
Blykalla AB · Stockholm
Som Fuel Performance Lead hos Blykalla kommer du att leda utvecklingen och kvalificeringen av avancerat bränsle för Sveriges första små modulära reaktorer (SMR) med blykyld teknik.
Som Fuel Performance Lead hos Blykalla kommer du att leda utvecklingen och kvalificeringen av avancerat bränsle för Sveriges första små modulära reaktorer (SMR) med blykyld teknik.
Help Us Prove a New Standard in Nuclear Fuel
Are you a technically sharp, self-driven engineer or scientist who understands how nuclear fuel really behaves - and how to prove it with credible models? Join Blykalla and lead the fuel development and qualification effort that underpins the use of a novel nuclear fuel in an advanced reactor. This role puts you at the center of predicting, validating, and defending fuel behaviour for the western world’s first lead-cooled SMR. You’ll own the delivery of the fuel qualification programme, and strongly influence the development of models and codes that allow for producing regulator-ready evidence to understand our fuel performance.
What we do at Blykalla At Blykalla
we are developing the next generation of nuclear technology with our Advanced Small Modular Reactor (SMR), based on uranium nitride fuel and a compact, lead-cooled design. As Sweden’s only SMR developer, we are on a mission to decarbonize heavy industry and other energy-intensive sectors and deliver safe, scalable, and sustainable energy.
What you’ll get to do Your mission is to ensure that we can predict, explain and justify fuel behaviour with confidence, using validated models, defensible assumptions and traceable data. Build & evolve fuel performance models
● Take ownership of the development, extension, and adaption of fuel performance models for a lead-cooled fast-spectrum operation, with a focus on physical mechanisms rather than black-box use.
● Lead the benchmarking of models against multiple fuel types (including nitride, oxide and metallic fuels) and fuel performance codes, to support comparison, validation, and fallback options. ● Understand and improve model behaviour by analysing why models work, where they break down, and what must be changed for lead-cooled fast spectrum operation.
● Work closely with experimental and design teams to specify experimental testing (in- and out-of-pile) and examinations that generate data relevant for model validation or development. Shape data, experiments, and model credibility
● Define what experimental and operational data are needed to support, challenge, and improve fuel performance models
● Work closely with experimental and design teams to specify irradiation tests and pre- and post-irradiation examinations that generate data relevant for model validation or development
● Integrate data from experiments, literature, and historical programmes to calibrate models, assess validity ranges, and reduce key uncertainties
● Contribute to cross-disciplinary activities between reactor physics, thermal hydraulics, materials, backend, safety and licensing to ensure design coherence, manufacturability, and regulatory compliance. Align modelling with fuel qualification, licensing and industrialisation
● In collaboration with the Head of Fuel and wider fuel team, drive forward the company's advanced fuel qualification and update our plans for how the company will meet them.
● Define, maintain and own the modelling basis used in fuel qualification, including scope, gaps, assumptions, acceptance criteria, and regulatory expectations
● Coordinate with international labs and irradiation facilities to secure the knowledge and services (irradiation, PIE) needed to reach qualification and licensing goals.
● Ensure Blykalla is pro-active in interfacing with regulatory bodies and relevant programs that support advanced fuel qualification/performance modelling (including, but not limited to: SSM, DOE/NRC and IAEA).
● Contribute to the establishment of modelling workflows, documentation, and quality practices that ensure traceability, reproducibility, and regulatory readiness Fuel Design & Development
● With the Head of Fuel and Head of Nuclear Safety, coordinate cross-disciplinary integration of the fuel design between nuclear design, thermal-hydraulics, materials group, fuel experimental and modelling teams to ensure design coherence, consistent modelling assumptions, manufacturability, and regulatory compliance." Technical leadership
● With the Head of Fuel, support the transfer of knowledge and development of the next generation of “subject matter experts” across both fuel performance authorities or cross-disciplinary technical leadership.
● Provide technical mentorship to early career individuals, disseminating your experience and knowledge. Experience & Qualifications
● At least 15-years post-degree experience in nuclear fuel modelling, development and/or qualification.
● Modelling and simulation experience covering code/model modification, development or critical assessment rather than “black-box” use
● Degree, ideally PhD in nuclear engineering, physics, chemistry or a closely related field
● Experience defining and integrating experimental data from irradiation tests, post-irradiation examinations, literature, or historical programmes to support and improve modelling and accelerate fuel qualification
● Ability to define what data and experiments are needed to support model credibility and uncertainty reduction, and to work effectively with experimental and qualification teams
● Demonstrated ability to understand fuel behaviour at the mechanism level and to diagnose why models work, where they fail, and how they must be improved
● Hands-on experience with fuel performance codes such as TRANSURANUS, FRAPCON/FRAPTRAN, BISON, or similar tools, including extending, adapting, or validating models
● Understanding of how modelling contributes to fuel qualification, safety arguments, and regulatory submissions
● Ability to communicate and defend modelling assumptions, limitations, and results in technical discussions with regulators, authorities, and partners
● Fluency in English; Swedish is an advantage
● Willingness to travel within Europe, North America and occasionally beyond
● Eligibility to work with nuclear materials in Sweden Location The position is based in Stockholm. Travel to partner sites and research facilities will be part of the role.
About the job What we do at Blykalla Blykalla is a Swedish deep-tech company at the forefront of the nuclear industry, pioneering the development of small modular reactors that provide clean, safe, and reliable energy. Thanks to lead-cooling, we achieve high safety in a very compact format, allowing for a simple and cost-effective design that can be mass-produced. Our unique reactor design will provide safe and green baseload energy that perfectly complements solar and wind power . What you'll get to do We're seeking an experienced Nuclear Safety Engineer within deterministic safety analysis to join our Nuclear Engineering & Safety team in Stockholm. In this role, you will analyze the safety case for our lead-cooled fast reactor designs, using deterministic methods on transient and accident conditions. An important part of the job is to document your work with the aim of supporting regulatory interactions, thereby ensuring that our SMRs meet and demonstrate the highest level of nuclear safety throughout design, licensing, and deployment. More specifically, you will: Develop and maintain the deterministic safety analysis case for our cutting-edge lead-cooled fast reactor designs Perform simulation and analysis of transient and accident conditions using computer codes such as Bella, Apros and Spectra, as well as fuel performance and/or CFD tools, depending on skills and interest. Develop and maintain a transparent and efficient ecosystem of computer codes, plant models, verification & validation cases and all associated documentation. Prepare safety analysis reports and technical submittals for regulatory review Stay current with advances in safety methodologies, computer codes, regulatory requirements, and international standards Who'll you'll get to work with The Nuclear Safety & Licensing 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. Cross-functional interaction with the fuel performance team will be an important part of your job. 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: Master's degree in engineering, physics, or related field 5-10 years of experience in deterministic safety analysis for any commercial reactor types Strong understanding of reactor safety principles, defense-in-depth, transients and accident phenomenology Familiarity with regulatory frameworks (SSM, NRC, IAEA, or equivalent) and licensing processes Excellent analytical, problem-solving, and technical writing skills Fluent in English, spoken and written 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. So, what do you think? Don't miss the chance to be at the forefront of revolutionizing nuclear power. Join our team as a Nuclear Safety 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! We do not accept applications via email. We are not open to external help from recruitment agencies.
Are you passionate about high-performance electronics, embedded systems, and cutting-edge engine technology? Join our client’s innovative engineering team where your expertise in hardware design will directly impact next-generation technology. Apply today, as we review applications on an ongoing basis! About the role Our client is a specialist and market leader in advanced electronic engine management systems, Vessel/Vehicle control systems and Power distribution modules. They develop the hardware and software that optimizes performance, reduces fuel consumption, and lowers emissions for everything from marine and automotive applications to industrial engines running on renewable fuels and next- generation hybrid/electric systems with a legacy of high-octane motorsport. As a Hardware Engineer, you will play an important role creating next-generation Electronic Control Units (ECUs). You will join a collaborative, highly technical engineering team where your work has a direct impact. Your market will be truly global, supporting customers across the EU, US, India, and the UK from initial specification all the way to mass production. Work tasks In this role, you will own the hardware development lifecycle. You will be responsible for delivering high-quality products on time and within scope. Your main responsibilities will include: End-to-End Hardware Design: Developing specifications, schematics, component configurations, and PCB designs for advanced ECUs. Documentation & Strategy: Creating Bill of Materials (BOM) and documented design strategies, including hardware design descriptions and precise calculations. Design Verification: Ensuring technical excellence through rigorous testing and verification phases. Customer Collaboration: Acting as a technical bridge for clients worldwide. This includes understanding their needs, supporting them from prototyping to certification, and occasionally traveling to client sites to help implement the products firsthand. We are looking for A university degree in Electrical Engineering, Mechatronics, Computer Science, or a similar field A strong, demonstrable interest in hardware development (gained through university, professional experience, or personal hobby projects). Solid knowledge of embedded systems hardware. Professional fluency in English, both written and spoken It is meritorious if you have experience in: Working in a similar role within a company in the automotive industry Group Lead – daily planning and follow up of deliverables Power electronics development Emotor control Unmanned Vessels/Vehicles Low level software: HardWare InterFace (HWIF) and eTPU coding Establishing and maintaining customer relations Our recruitment process This recruitment process is handled by Academic Work and it is our client’s wish that all questions regarding the position is directed to Academic Work. Our selection process is continuous and the advert may close before the recruitment process is completed if we have moved forward to the next phase. The process includes two tests: one personality test and one cognitive test. The tests are tools to find the right talent for the right position, to enable equality, diversity, and a fair process.
Want to shape the future of waterborne transport and join a world-class team? Candela is the global leader in electric hydrofoil vessels. Since 2014, we’ve gone from building our first premium electric speedboat in a small Stockholm workshop to delivering game-changing vessels around the globe. The Candela P-12 is our latest innovation - the world’s first electric hydrofoil ferry is not just operating in Stockholm, but now attracting orders from around the world. Our boats “fly” thanks to computer-guided underwater wings under the hull made out of lightweight carbon fiber. The wings lift the vessel above the water, which results in cutting energy use by up to 80%, while offering zero emissions and a far better passenger experience than traditional diesel vessels. And that’s exactly why we do this. Our mission is clear: to speed up the transition to fossil fuel–free lakes and oceans. You can be part of the amazing team in Candela now! We are looking for a Senior Production Planning Manager to support Candela’s future growth ambitions. Purpose and Goals In this role, you will take ownership of developing and scaling Candelas global production planning as we prepare for multi-site manufacturing. You will build the structure and processes needed to support our continued growth, ensuring alignment across Sourcing, Production, and Logistics so that production runs smoothly and on schedule. You will also strengthen planning tools and workflows, using advanced Excel models while supporting the transition of planning processes into Odoo. You will work closely with a production administrator in Rotebro and a global controller, reflecting the close link between production planning and financial performance. The role will be an important part of the Operations management team as Candela expands its global production footprint. Your core responsibilities will include: Create, update, and monitor the daily/weekly/bi-weekly and long-term production plan based on manning capacity, material availability, R&D and ME releases. Create KPI and planning reports to the COO and participate as support at performance reviews with the CEO. Analyze stock levels, anticipate shortages, and alert Procurement before issues escalate. Ensure production orders, in Odoo, are created, sequenced, and closed correctly. Track production KPIs and flag risks early. Work closely with the Production team to challenge and adjust priorities when things shift. Prepare planning reports in Excel and support the migration of these workflows into Odoo. Follow up on critical ongoing production activities and keep teams aligned with deadlines. Support continuous improvement initiatives across planning processes. What are we looking for? You are highly organized with a natural drive to keep processes structured and efficient. You thrive in a fast-paced environment where priorities can change quickly and are comfortable adapting when needed. With strong analytical skills and clear communication, you work effectively with operational teams at all levels across the organization. Requirements: 5+ years of experience in production planning, supply chain, or a similar operational role. Strong Excel skills (INDEX/MATCH, XLOOKUP, Pivot Tables, data cleaning, etc.). A relevant University degree within Engineering and/or Business. It would be preferred if you have: Experience with Odoo. Background in manufacturing or physical production environments. Understanding of Lean / continuous improvement principles. Form of employment: Full-time with initial 6 month probation period Start date: ASAP Location/base: Rotebro/Frihamnen Reporting to: COO Why people love working at Candela? At Candela, we’re not just building electric vessels - we’re creating a whole new category of clean, efficient waterborne transport. You get the chance to work with cutting-edge technology, solving complex challenges, and seeing the results in action - sometimes literally, when we organize test rides for our newcomers! We’re a diverse and ambitious team of over 50 nationalities, united by a revolutionary spirit and kindness. That means we work hard, but always with humility and while having fun - whether it’s solving a manufacturing challenge, improving processes, or cheering each other on during Candela Months, our year-round calendar of bonding activities and events. We’re office-first but not office-only. We believe collaboration is most powerful when we build together, in person - but we also trust our team to work in ways that fit their life. At Candela, you’ll find a place where bold ideas are welcomed, great people are celebrated, and the ride is just as important as the destination. We welcome the opportunity to meet you!