Azolio / Blykalla

How do you inspect a reactor component through liquid lead, a coolant you cannot see through? No standard procedure exists for it yet, and none will until someone works out how ultrasound behaves in lead and builds a method around it. We are looking for a Level III in UT who wants to work this out together with us. You start the development and shape the technical roadmap with the team: what to investigate, with which techniques (PAUT, TOFD, TFM, EMAT and related), and in what order. You work on our test rigs and with partners, turn the data into better methods, and build the technical basis for the procedures and acceptance criteria. With your Level III competence in UT, you also support and guide the Level II technicians who will apply them. You are our main technical contact towards UT suppliers, and you collaborate with welding, materials, design and quality so that components are inspectable by design. WHAT WE DO AT BLYKALLA Blykalla is developing the next generation of nuclear technology with our Small Modular Reactor (SMR) based on innovative fuel, materials, and reactor designs. As Sweden’s only SMR developer, we are on a mission to decarbonize industries and enable safe, scalable, and sustainable energy solutions. Our technology uses uranium nitride fuel and lead coolant, creating novel challenges and opportunities for the fuel cycle and supporting systems. WHAT YOU’LL GET TO DO As Senior NDT R&D Engineer, you connect the method, the data and the evidence that it works. You help shape what gets developed and in which order, work with our team and partners on the test rigs, and make sure each method is validated before it goes into use. Your responsibilities will include: Method Development & Roadmap * Shape and maintain the UT method roadmap for NDE and In-Service Inspection together with the team, focused on through-lead acoustics: what is developed, in which order, and to what maturity. * Develop and adapt UT techniques (PAUT, TOFD, TFM, EMAT and others) to our geometries, materials and operating conditions, working from first principles where needed. * Draft UT procedures and acceptance criteria for LFR components, with input from welding, materials and quality. Testing, Data & Validation * Plan and run trials, mock-ups and reference samples on components, welds and base materials, on our test rigs or with partners, and join hands-on where a method needs it. * Interpret signals, characterise defects, and use signal processing and frequency-domain analysis to improve probe setup, calibration, procedures and sensitivity. * Document the evidence that each method performs as intended, and look after the integrity of inspection data. Level III Responsibilities * Approve and release validated UT procedures and acceptance criteria under the written practice. * Authorise Level II personnel, guide and mentor them, and maintain the written practice for UT. Suppliers, Partners & Team * Be our main technical contact for UT suppliers: screen and test their solutions, share findings, and give the technical decision and recommendation for selection. * Work together with research institutes, universities and our welding, materials, design and quality teams, so that components are inspectable by design. * Support documentation for codes and standards (ASME, ISO) and for customer and regulatory dialogue. WHERE THIS ROLE CAN TAKE YOU You will help shape how SEALER components are inspected, from the first test rig to fleet deployment. As the NDE and In-Service Inspection area grows, the role grows with it: into Responsible Level III for NDE and In-Service Inspection, with dedicated NDT R&D engineers joining the team to build the methods further together with you. WHO YOU ARE You are a curious, thoughtful engineer who enjoys turning an inspection problem into a method, and a method into data the team can trust. You bring technical depth, practical UT experience and a structured way of working, and you are not afraid to ask a supplier the critical question and check the answer against the data. We believe you have: * ISO 9712 Level 3 in UT (or equivalent, for example SNT-TC-1A Level III), with experience maintaining a written practice and guiding Level II technicians. * Practical UT experience in a regulated industry (aerospace, oil & gas, nuclear, power generation or pressure equipment), including at least one advanced technique (PAUT, TOFD, TFM or EMAT), and familiarity with ASME, ISO and industry NDT codes. * Experience in method development or inspection R&D, and the curiosity to work out a method from first principles when no standard procedure applies. * A good understanding of ultrasonic wave propagation and signal processing in the time and frequency domain. * An engineering or scientific degree (mechanical, materials, physics, acoustics or similar). * Clear communication and good collaboration with engineering, quality, suppliers and research partners. It is a plus if you also have: * A PhD. * Experience with test rigs or advanced inspection set-ups, and in working together with suppliers to evaluate their equipment. * Data analysis in Python or MATLAB, and NQA-1 or AS9100 experience. * Additional methods such as ET, or inspection experience with hazardous or high-temperature media such as liquid metal. LOCATION The position is based in Stockholm, with travel to Oskarshamn and partners expected.

Every design choice in our SEALER reactor needs evidence that it works. As Test & Validation Engineer for SEALER-E, our research setup at the Advanced Reactor Test Site in Oskarshamn, you shape the tests that provide it: you plan the tests, write the test plans and assess the results. Our product development follows the V-model, with a gate review at each stage. You make sure every gate rests on evidence the project can trust. You work side by side with the V&V Architect and a project team guided by a Project Manager, while our Commissioning and Test Engineers run the tests on site. This role ensures that SEALER technologies progress from concept to deployable system in a coherent, traceable, and strategically well-aligned way. WHAT WE DO AT BLYKALLA Blykalla is developing the next generation of nuclear technology with our Small Modular Reactor (SMR) based on innovative fuel, materials, and reactor designs. As Sweden’s only SMR developer, we are on a mission to decarbonize industries and enable safe, scalable, and sustainable energy solutions. Our technology uses uranium nitride fuel and lead coolant, creating novel challenges and opportunities for the fuel cycle and supporting systems. WHAT YOU’LL GET TO DO As Test & Validation Engineer, you connect requirements, tests and evidence along the V-model. On the left side you shape the test programme and the test plans together with the system / design engineers. On the right side you assess the results and help the project close its gate reviews. Tests range from thermal-hydraulics and mechanical components to instrumentation and system integration. Your responsibilities will include: Test Programme & Test Matrix * Build the test programme and test matrix for SEALER-E together with the technology domain owners, based on the Design Verification Plan, the Technology Maturation Plans and the failure modes and risks from the safety assessment. * Sort tests into development, verification, qualification and demonstration tests, and link each to a V-model stage. * Agree on instrumentation and data needs with I&C, and plan how the test rigs contribute evidence to the project. Test Plans & Campaigns * Write test specifications and plans with objectives, conditions, acceptance criteria and stop points, together with the system / design engineers and safety. * Coordinate each test campaign from the project planning side: scope, sequence and readiness for cold and hot commissioning. Hand the plan over to the Commissioning and Test Engineer who runs the campaign on site, and stay available for questions, deviations and changes. * Review test data, deviations and uncertainty after each test, and write the test report with conclusions, follow-up actions and feedback to design. Verification, Validation & Gate Reviews * Review requirements early to make sure they can be verified, and choose the verification and validation method for each: inspection, analysis, test or demonstration. * Take accountability for the verification and validation sign-off at each gate review, based on evidence that is sufficient, valid and traceable. * Keep the evidence record up to date from requirement to test result, raise open gaps early and route them into change and corrective action. Working with the Project * Work with the Project Manager, who guides the project and owns the delivery gate, and keep the test matrix and V&V status visible to the whole team. * Work with system / design engineers, suppliers, external laboratories and research partners, and use their results as evidence without co-authoring them. * Review the test plans and acceptance criteria of another project, and have yours reviewed in return. WHERE THIS ROLE CAN TAKE YOU You will help shape how SEALER tests turn into trusted evidence, from the first test rig to fleet deployment. As the V&V team grows, this role can develop into guiding the Test & Validation Engineers or into broader technical responsibility within SEALER’s development. WHO YOU ARE You are a curious engineer who enjoys turning a technical question into a clear plan, and a plan into evidence the team can trust. You bring technical depth, a structured way of working, and the honesty to say when a requirement is not yet verified, and why. We believe you have: * A relevant engineering degree (mechanical, chemical, process, nuclear, aerospace, systems engineering, or similar). * Experience in test engineering, commissioning or verification and validation of complex systems. * Experience writing test plans with acceptance criteria, and keeping a test matrix or verification plan (for example DVP&R) traceable to requirements. * Experience with instrumentation, data acquisition and test data evaluation (for example in Python or MATLAB), including how results scale from small rigs to larger systems. * Understanding of systems engineering methods, including the V-model, gate reviews and stage-gate ways of working. * Working knowledge of FMEA and failure mode identification, risk-based thinking and process understanding, to set safe test conditions. * Familiarity with Technology Readiness Levels (TRL) and readiness assessments. * Strong communication and collaboration skills across disciplines, including system / design engineers, site engineers and the Project Manager. * A background in nuclear, aerospace or another regulated industry, with NQA-1 or AS9100 experience, is a plus, as is test experience with hazardous or high-temperature media such as liquid metal. LOCATION The position is based in Stockholm, with travel to Oskarshamn and partners expected. You report to the Test and Operations Manager. Full-time and permanent, with the option to start as a contractor and move into permanent employment.

WHAT WE DO AT BLYKALLA Blykalla is a global leader in advanced nuclear technology, commercialising the next generation of clean, reliable energy through its lead-cooled reactor, the SEALER. By combining decades of specialised research with world-class partners, Blykalla is building the backbone of the global AI and industrial economy. For more information, visit https://www.blykalla.com. WHAT YOU’LL GET TO DO We're seeking a Senior Thermal-Hydraulics Code Validation Engineer to join our Nuclear Engineering & Safety team, working from Stockholm or Oskarshamn. In this role, you will work on experiments with the aim of validating thermal-hydraulics system codes for use in the design and safety analysis of our lead-cooled fast reactors. More specifically, you will * Coordinate, specify and analyze experiments to be run in our ARTS (Advanced Reactor Testing Site) facility in Oskarshamn. * Act as a technical lead for engineers and technicians working on both the experiments and the simulation codes. * Contribute to our validation program for thermal hydraulics system codes and associated methodologies. * Stay current with advances in thermal hydraulics, computational methods, and regulatory requirements. WHO YOU’LL GET TO WORK WITH The thermal-hydraulics validation engineer sits in the Nuclear Engineering & Safety team within Blykalla, and reports to the manager of Nuclear Engineering & Safety. We are a diverse team that is passionate about our work and our company. You can choose to work from any of our offices in Stockholm, Oskarshamn or ARTS (at Simpevarp). In case of work from the Stockholm office, frequent (monthly) travel to the ARTS site is expected. WHO YOU ARE You will be part of a highly skilled team with a can-do attitude. We value personal chemistry and strive to create a workplace where you enjoy coming to. There are however a few things that we think will help for you to succeed in this role, these are: * Master's degree in physics, engineering or a related field * Hands-on experience in designing, commissioning, and performing thermal-hydraulic experiments, including instrumentation and data analysis * Familiarity with building validation envelopes for system codes used in nuclear safety analysis such as BISON (BWR), TRACE, RELAP, APROS or similar as well as for CFD tools * Solid understanding of the physics and phenomena involved in thermal hydraulics simulations * A structured way of working, together with excellent problem-solving and technical writing skills * Fluency in English, spoken and written Meritorious skills: * Working experience in safety analysis of PWR, BWR or advanced reactors * Working experience from liquid metal applications * Experience in supporting nuclear licensing activities or in regulatory interaction * Fluency in Swedish, spoken and written If you are not sure that you are 100% qualified, but are up to the challenge, we encourage you to apply. Location This position is for our office in Stockholm, Oskarshamn or ARTS (Simpevarp) So, what do you think? Don't miss the chance to be at the forefront of revolutionizing nuclear power. Join our team as Senior Thermal-Hydraulics Code Validation Engineer and help shape the energy landscape of tomorrow. Apply today with your resume and a cover letter highlighting your relevant experience and achievements. We are proud to foster an inclusive workplace free from discrimination. We strongly believe that diversity of experience, perspectives, and background will lead to a better environment for our employees and a better product. This is something we value deeply, and we encourage everyone to be a part of changing the way the world thinks about power supply! Reference & Background Checks As part of our recruitment process, we conduct background checks on all candidates. We may also conduct reference checks to gain a well-rounded understanding of your professional experience, performance, and ways of working. This includes both references provided by you and, where relevant, conversations with other professional contacts who have worked closely with you. We strive to be transparent about our reference-checking process and handle all personal data in accordance with applicable data protection regulations. Any additional references will be sought with professional judgment and only when considered relevant to the role. Salary Range: SEK 57 000 - 95 000 / month, depending on experience and qualifications. We offer competitive compensation aligned with our internal salary framework and growth potential in the role. We do not accept applications via email. We are not open to external help from recruitment agencies. Note on AI Use: Blykalla may use AI technology to assist with certain administrative aspects of the hiring process, such as note-taking, interview documentation, and reporting. However, every resume and application is reviewed directly by our recruiting team. AI tools are used solely for operational support and do not influence candidate evaluation or hiring decisions.

WHAT WE DO AT BLYKALLA Blykalla is a global leader in advanced nuclear technology, commercialising the next generation of clean, reliable energy through its lead-cooled reactor, the SEALER. By combining decades of specialised research with world-class partners, Blykalla is building the backbone of the global AI and industrial economy. For more information, visit https://www.blykalla.com. WHAT YOU’LL GET TO DO We are looking for a Modularization Lead to make our SEALER reactor cost-competitive by design. Small reactors lack the economies of scale of large plants – our business case depends on a reactor built in factories, from standard components, with every design choice weighed against cost and value. You will own that agenda across our reactor development program. This is a role for someone who wants to shape the product, not review it afterwards. You will sit at the table where design decisions are made and have the mandate to change how they are made. Key responsibilities include: * Own and drive design-to-value across our reactor development program – break cost, availability, and schedule targets down to system level and hold design choices against them * Implement design-to-value ways of working in the design and engineering team – processes, design reviews, rules, and tools that make cost and value part of every design decision. * Define and own the modularization strategy and roadmap – degree of modularization, module boundaries, standardized interfaces, and the path from first-of-a-kind to fleet. * Drive component standardization and COTS – standard before custom, across systems and plant units. * Enable a reactor designed for factory production – off-site fabrication, pre-testing, transport, and fast site assembly, together with suppliers. WHO YOU’LL GET TO WORK WITH The Modularization Lead sits in the Product team within Blykalla, and reports to the Head of Product. You will work daily with design engineering, cost engineering, procurement, and construction, and closely with suppliers and partners. We are a diverse team that is passionate about our work and Blykalla. WHO YOU ARE You will be part of a highly skilled team with a can-do attitude. We value personnel chemistry and strive to create a workplace where you enjoy coming to. You have taken a complex engineered product from one-off engineering to standardized, factory-built modules – and you know that cost is decided at the drawing board, not on site. You are comfortable challenging designers on why a component is custom, and credible enough that they listen. You will be part of a highly skilled team with a can-do attitude. We value personnel chemistry and strive to create a workplace where you enjoy coming to. There are however a few things that we think will help for you to succeed in this role, these are: * 8+ years in modularization, design-to-value/design-to-cost, or industrialization of complex engineered products (e.g., shipbuilding, offshore, process plants, aerospace, automotive, or energy). * Proven track record of moving a product towards standardized, factory-built modules and COTS components. * Hands-on with design-to-value methods – target costing, cost teardowns, value engineering, and trade studies. * Strong understanding of interface management, manufacturing, transport, and site assembly constraints. * Ability to change how engineering teams work – introducing processes that stick, not just documents. * Clear and structured communication – you can make the cost case to both engineers and executives. * Fluent in English, spoken and written. * Fluency in Swedish is a plus. We don’t expect candidates to already know the nuclear industry – we are looking for someone who has industrialized complex products elsewhere and wants to apply it to a first-of-a-kind reactor. Exposure to some of the areas below is a plus, not a checklist. Meritorious skills: * Experience from nuclear or other regulated, safety-classified industries. * Modular plant construction – e.g., structural modules, skid-based process modules, open-top installation. * Modular product architecture or platform design in serial production. * 3D/BIM, PLM, or digital tools for layout, cost tracking, and decision support. * Experience building a new function or capability from scratch. If you are not sure that you are 100% qualified but are up to the challenge, we encourage you to apply. Location This position is for our office in Stockholm. So, what do you think? Don't miss the chance to be at the forefront of revolutionizing nuclear power. Join our team as Modularization Lead and help shape the energy landscape of tomorrow. Apply today with your resume and a cover letter highlighting your relevant experience and achievements. We are proud to foster an inclusive workplace free from discrimination. We strongly believe that diversity of experience, perspectives, and background will lead to a better environment for our employees and a better product. This is something we value deeply, and we encourage everyone to be a part of changing the way the world thinks about power supply! Reference & Background Checks As part of our recruitment process, we conduct background checks on all candidates. We may also conduct reference checks to gain a well-rounded understanding of your professional experience, performance, and ways of working. This includes both references provided by you and, where relevant, conversations with other professional contacts who have worked closely with you. We strive to be transparent about our reference-checking process and handle all personal data in accordance with applicable data protection regulations. Any additional references will be sought with professional judgment and only when considered relevant to the role. We offer competitive compensation aligned with our internal salary framework and growth potential in the role. We do not accept applications via email. We are not open to external help from recruitment agencies. Note on AI Use: Blykalla may use AI technology to assist with certain administrative aspects of the hiring process, such as note-taking, interview documentation, and reporting. However, every resume and application is reviewed directly by our recruiting team. AI tools are used solely for operational support and do not influence candidate evaluation or hiring decisions.

WHAT WE DO AT BLYKALLA Blykalla is a global leader in advanced nuclear technology, commercialising the next generation of clean, reliable energy through its lead-cooled reactor, the SEALER. By combining decades of specialised research with world-class partners, Blykalla is building the backbone of the global AI and industrial economy. For more information, visit https://www.blykalla.com. WHAT YOU’LL GET TO DO * Run the monthly close across the Group's companies — reconciliations, accruals, and reporting packages that feed group consolidation. * Be the day-to-day contact for our external accounting firm, coordinating bookkeeping across subsidiaries and making sure each close lands on time and in the right format. * Own cash flow and liquidity planning, including rolling forecasts and payment planning. * Follow up actuals against budget, analyze variances, and be the first point of contact for project managers who need to understand their numbers. * Prepare supporting documentation for audits and annual reporting, and work with our auditors on the schedules they request. * Perform and document internal controls, and help strengthen the routines behind them as we scale. * Act as a go-to person for finance questions across the organization. WHO YOU’LL GET TO WORK WITH You will be part of a highly skilled team with a can-do attitude. We value personnel chemistry and strive to create a workplace where you enjoy coming to. There are, however, a few things that we think will help you succeed in this role; * Degree in Finance, Economics, Industrial Engineering, or equivalent. * 2-3 years in accounting or financial control, ideally from an audit firm, an accounting firm, or a group with several legal entities. * Comfortable owning a monthly close end to end and working independently against deadlines. * Curious about the business, not only the ledger — you want to understand why a number moved, not just that it did. * Strong in Excel, and quick to find your way in new systems. * Communicative and collaborative – you create clarity and trust across teams. * Fluent in English; Swedish is a plus. Meritorious skills: * Experience from a fast-growing, international, or project-driven organization. Location The position is based at our office in Stockholm. So, what do you think? Don't miss the chance to be at the forefront of revolutionizing nuclear power. Join our team as Financial controller and help shape the energy landscape of tomorrow. Apply today with your resume and a cover letter highlighting your relevant experience and achievements. We are proud to foster an inclusive workplace free from discrimination. We strongly believe that diversity of experience, perspectives, and background will lead to a better environment for our employees and a better product. This is something we value deeply, and we encourage everyone to be a part of changing the way the world thinks about power supply! Reference & Background Checks As part of our recruitment process, we conduct background checks on all candidates. We may also conduct reference checks to gain a well-rounded understanding of your professional experience, performance, and ways of working. This includes both references provided by you and, where relevant, conversations with other professional contacts who have worked closely with you. We strive to be transparent about our reference-checking process and handle all personal data in accordance with applicable data protection regulations. Any additional references will be sought with professional judgment and only when considered relevant to the role. Salary Range: SEK 43 000 – 50 000/ month, depending on experience and qualifications. We offer competitive compensation aligned with our internal salary framework and growth potential in the role. We do not accept applications via email. We are not open to external help from recruitment agencies. Note on AI Use: Blykalla may use AI technology to assist with certain administrative aspects of the hiring process, such as note-taking, interview documentation, and reporting. However, every resume and application is reviewed directly by our recruiting team. AI tools are used solely for operational support and do not influence candidate evaluation or hiring decisions.

WHAT WE DO AT BLYKALLA Blykalla is a global leader in advanced nuclear technology, commercialising the next generation of clean, reliable energy through its lead-cooled reactor, the SEALER. By combining decades of specialised research with world-class partners, Blykalla is building the backbone of the global AI and industrial economy. For more information, visit https://www.blykalla.com. WHAT YOU’LL GET TO DO As Fluid System Engineer you will own one or more of the fluid systems of SEALER, from concept through qualification. Depending on where the department needs support at the time of your joining, this could mean the cover gas system, the lead conditioning and purification circuits, the depressurisation system, other safety-classified reactor auxiliaries, or systems on the secondary side. In every case you will act as the system-responsible engineer: defining what the system must do, how it should be designed, and how it integrates into the plant. WHAT YOU'LL GET TO DO * Own the functional and design requirements, design basis, and system architecture for the fluid systems assigned to you. * Lead trade-off studies on system configuration, and drive the design forward through concept, preliminary, and detailed design phases. * Define the scope of supporting analyses (thermohydraulic, structural, chemical), provide inputs to specialists, and critically review their results. Use hand calculations to sanity-check outputs and steer the design. * Define supplier work packages, evaluate proposals, and manage the technical dialogue with suppliers and partners from concept through qualification. * Ensure system requirements are traceable to plant-level and safety objectives, and that the system integrates correctly with neighbouring systems and disciplines. * Contribute to system-level documentation, chair or participate in design reviews, and maintain the plant technical baseline for your systems. * Support commissioning and testing activities as the plant progresses toward operation. WHO YOU’LL GET TO WORK WITH The Fluid System Engineer sits in the Fluid Systems Engineering Team within Blykalla, and reports to the Manager of Fluid Systems Engineering. You will collaborate daily with the other system engineers in the team, and interface closely with the Mechanical, Nuclear and Safety, Test and Validation, Quality, Material, Layout and Piping, and Electrical and I&C teams, as well as with external suppliers and research partners. We are a diverse team that is passionate about our work and Blykalla. WHO YOU ARE You will be part of a highly skilled team with a can-do attitude. We value personnel chemistry and strive to create a workplace where you enjoy coming to. There are however a few things that we think will help in order for you to succeed in this role, these are: * More than 3 years of professional experience as a system, process, or fluid engineer on complex power, process, or industrial plants. * Degree in mechanical, energy, chemical, nuclear, or a closely related engineering discipline. * Solid working knowledge of applied thermodynamics, thermohydraulics, and heat and mass transfer. * Working understanding of P&IDs, PFDs, piping and instrumentation conventions, and how a fluid system connects with layout, electrical, and I&C scope. * Comfort writing clear technical specifications, reviewing supplier deliverables critically, and managing a multi-vendor technical dialogue. * Familiarity with applicable industrial codes and standards (ASME, PED, or equivalent). * Familiarity with CAD tools and engineering software; comfort scripting in Python or MATLAB is a plus. * Fluent in English, spoken and written. * Fluency in Swedish is a plus. Meritorious skills: * Nuclear industry experience, ideally in reactor system design or in nuclear auxiliary systems. * Familiarity with heavy liquid metal or sodium technology. * Experience with fluid systems for gas conditioning, chemistry control, or purification. * Prior involvement in supplier or partner codevelopment of complex equipment. * Experience with plant engineering tools (AVEVA, Hexagon, AutoPlant, Kadmatic, or equivalent) and PLM systems. * Experience contributing to a nuclear licensing submittal. Location This position is for our office in Stockholm. So, what do you think? Don't miss the chance to be at the forefront of revolutionizing nuclear power. Join our team as Fluid System Engineer and help shape the energy landscape of tomorrow. Apply today with your resume and a cover letter highlighting your relevant experience and achievements. We are proud to foster an inclusive workplace free from discrimination. We strongly believe that diversity of experience, perspectives, and background will lead to a better environment for our employees and a better product. This is something we value deeply, and we encourage everyone to be a part of changing the way the world thinks about power supply! Reference & Background Checks As part of our recruitment process, we conduct background checks on all candidates. We may also conduct reference checks to gain a well-rounded understanding of your professional experience, performance, and ways of working. This includes both references provided by you and, where relevant, conversations with other professional contacts who have worked closely with you. We strive to be transparent about our reference-checking process and handle all personal data in accordance with applicable data protection regulations. Any additional references will be sought with professional judgment and only when considered relevant to the role. We offer competitive compensation aligned with our internal salary framework and growth potential in the role. We do not accept applications via email. We are not open to external help from recruitment agencies. Note on AI Use: Blykalla may use AI technology to assist with certain administrative aspects of the hiring process, such as note-taking, interview documentation, and reporting. However, every resume and application is reviewed directly by our recruiting team. AI tools are used solely for operational support and do not influence candidate evaluation or hiring decisions.

As Manager of Fluid Systems Engineering, you will lead the team responsible for the fluid systems of SEALER, Blykalla’s lead-cooled small modular reactor (SMR) – from the molten lead in the reactor pool to the steam powering the turbine. This is a key engineering leadership role with a broad plant-level perspective. Your team owns the functional and system engineering of the primary and secondary fluid systems, bringing together thermodynamics, thermohydraulics and system engineering to ensure they perform as one integrated plant. You will lead and develop a growing team of fluid system engineers, set the technical direction and priorities for the department, and work closely with engineering teams and industrial partners to turn the reactor design into robust, buildable solutions. The role combines technical and people leadership, giving you the opportunity to shape both the engineering and the team behind some of the most critical systems in Blykalla’s nuclear power plant. WHAT YOU'LL GET TO DO * Lead and grow a team of approximately 15 system engineers, with clear end-to-end system ownership. * Own the department's design intent across the fluid systems scope, from primary lead systems and reactor auxiliaries to steam generators, coolant pumps, secondary systems, and conventional island interfaces. * Set technical priorities across the portfolio, balancing Blykalla-specific engineering with proven industrial solutions. * Drive requirements-based systems engineering, with clear design basis documentation, traceable requirements, and trade-off studies guiding key design decisions. * Own the plant's thermodynamic and thermohydraulic backbone, including system performance, heat balance, and technical inputs to LCOE and energy system models. * Manage the department's key industrial partnerships (steam generator, primary coolant pump, intermediate loop and condenser cooling, turbine island), owning the plant design intent and requirements while the partners contribute equipment know-how and manufacturing capability. * Work across engineering disciplines and with commercial and strategy teams to drive plant-level design, integration, and performance. * Develop the team and department as Blykalla grows into a nuclear-regulated organisation, including hiring, project delivery, quality, and export-control requirements. WHO YOU'LL GET TO WORK WITH You will report to the VP of Engineering and join the Engineering leadership team, working closely with peer managers across Mechanical, Nuclear and Safety, Test and Validation, Quality, Material, Layout and Piping, and Electrical and I&C. You will also collaborate with commercial, strategy, and special projects teams, and represent Blykalla in technical discussions with industrial partners and potential customers on plant performance and integration. WHO YOU ARE You will be part of a highly skilled team with a can-do attitude. We value personnel chemistry and strive to create a workplace where you enjoy coming to. There are however a few things that we think will help for you to succeed in this role, these are: * More than 10 years of professional experience in fluid systems, thermohydraulics, or system engineering on complex power or process plants, with a meaningful portion of that time spent on plant-level system integration rather than component design in isolation. * Prior experience leading a technical team as a line manager or discipline lead. * Broad technical competence across the fluid systems scope. * Solid working understanding of plant layout, piping design, and the electrical and I&C scope, sufficient to challenge and integrate work owned by neighbouring teams even without being the discipline expert. * A track record of managing complex supplier and partner relationships in a codevelopment mode, from concept through qualification, with the ability to own the plant design intent while giving partners the space to bring their expertise. * Comfort writing clear technical specifications, chairing design reviews, and making decisions with incomplete information, with the temperament to argue your case and to change your mind when the evidence changes. * Fluent in English, spoken and written. * Fluency in Swedish is a plus. MERITORIOUS SKILLS: * Experience in the nuclear industry, ideally with exposure to Generation IV reactor programmes or comparable frontier technologies. * Prior experience with nuclear licensing, whether supporting a submittal to a regulator (SSM, NRC, or equivalent) or interfacing with licensing teams during design development. * Background in a scale-up or early-stage technology development environment, in addition to more mature industrial settings. * Familiarity with ASME III, RCC-M, RCC-MRx, PED, or equivalent nuclear-grade design codes, and with the transition into an NQA-1 quality environment. * Experience with plant heat balance and thermodynamic cycle modelling tools and with the technical inputs that feed LCOE and energy system models. * Experience with PLM systems and plant engineering tools (Aras Innovator, AVEVA, Hexagon, AutoPlant, Kadmatic, or equivalent). * Prior experience commissioning or operating a nuclear or thermal power plant, and comfort translating operational lessons back into design decisions. LOCATION This position is for our office in Stockholm. SO WHAT DO YOU THINK? Don't miss the chance to be at the forefront of revolutionizing nuclear power. Join our team and help shape the energy landscape of tomorrow. Apply today! We are proud to foster an inclusive workplace free from discrimination. We strongly believe that diversity of experience, perspectives, and background will lead to a better environment for our employees and a better product. This is something we value deeply, and we encourage everyone to be a part of changing the way the world thinks about power supply! We do not accept applications via email. We are not open to external help from recruitment agencies.

You will own the chemistry of SEALER's fluid systems, from the molten lead in the primary loop to the water-steam chemistry on the secondary side. You will define the chemistry envelope in which the plant operates and help develop the systems, instrumentation, and operational strategies that keep it there. The role sits at the intersection of chemistry and system engineering. You will work closely with our Materials team to ensure compatibility between coolants and structural materials, and translate chemistry requirements into practical engineering solutions for oxygen control, impurity management, water chemistry, and cover gas systems. WHAT YOU'LL GET TO DO * Define chemistry requirements for the primary lead loop and secondary water-steam systems, in close collaboration with the Materials team. * Develop the systems and instrumentation used to monitor and control chemistry, including oxygen control, impurity management, water chemistry conditioning, and cover gas systems. * Lead trade-off studies on chemistry control strategies and monitoring technologies. * Work with suppliers and academic and industrial partners on instrumentation, lead chemistry, and R&D. * Support chemistry-related operating strategies for startup, normal operation, shutdown, and abnormal conditions. * Work with the Nuclear Waste System Engineer on chemistry-related inputs such as polonium, activation products, and impurity streams. * Contribute to safety analyses for chemistry-related events, including loss of chemistry control and ingress events. WHO YOU'LL GET TO WORK WITH You will join Blykalla's Fluid Systems Engineering Team and report to the Manager of Fluid Systems Engineering. You will work closely with our Materials, Nuclear and Safety, and Test and Validation teams, as well as with external partners working on lead chemistry and materials. We are a diverse team that is passionate about our work and Blykalla. WHO YOU ARE You are an experienced chemist or engineer who enjoys turning complex chemistry into practical engineering solutions. You are comfortable working across disciplines and taking ownership in an environment where both the technology and the organisation are developing quickly. We think the following will help you succeed in the role: * More than 5 years of professional experience in industrial or nuclear chemistry, ideally involving coolant chemistry, corrosion control, or high-temperature chemistry. * A degree in chemistry, chemical engineering, materials, nuclear engineering, or a related field. * Strong understanding of high-temperature chemistry, corrosion mechanisms, and interactions between coolant chemistry and structural materials. * Experience with chemistry instrumentation, measurement, or sampling systems. * Ability to translate chemistry requirements into system-level engineering solutions. * Comfortable writing technical specifications and working with suppliers, researchers, and engineers from other disciplines. * Fluent in English, spoken and written. * Fluency in Swedish is a plus. MERITORIOUS SKILLS: * Experience with heavy liquid metal chemistry (lead, lead-bismuth), especially oxygen control and polonium handling. * Familiarity with sodium chemistry in sodium-cooled fast reactors, or with molten salt chemistry. * Prior involvement in reactor coolant chemistry for a nuclear plant (LWR primary or secondary chemistry, CANDU heavy water chemistry, etc.). * Nuclear licensing experience on chemistry-related topics. * Experience with FeCrAl or other alumina-forming alloys and their oxide layer development. * Familiarity with tritium management in fusion or advanced fission systems. If you are not sure that you are 100% qualified but are up to the challenge, we encourage you to apply. LOCATION This position is based at our office in Stockholm. SO, WHAT DO YOU THINK? Take the chance to work at the forefront of a new generation of nuclear power. Join Blykalla as a Nuclear Chemistry System Engineer and help develop the systems at the heart of SEALER. Apply today with your resume and a cover letter highlighting your relevant experience and achievements. We are proud to foster an inclusive workplace free from discrimination. We strongly believe that diversity of experience, perspectives, and backgrounds creates a better environment for our employees and a better product. We encourage everyone to be part of changing the way the world thinks about power supply. We do not accept applications via email. We are not open to external help from recruitment agencies.