Blykalla is scaling quickly in order to industrialize our small modular reactor (SMR) concept. If you are passionate about nuclear technology and want to make a...
Blykalla is scaling quickly in order to industrialize our small modular reactor (SMR) concept. If you are passionate about nuclear technology and want to make a significant impact, join us!
Blykalla is developing next-generation nuclear technology through the SEALER program, requiring structured and evidence-based technology maturation across multiple concurrent development streams. We are looking for a SEALER Technology Maturation & Validation Architect who will define and evolve the framework for Technology Readiness Levels (TRL), Technology Readiness Assessments (TRA), and Technology Maturation Planning across the portfolio.
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 SEALER Technology Maturation & Validation Architect, you will define and support how technologies mature across the SEALER portfolio. You will establish the framework that connects Technology Readiness, verification and validation approaches, and product development milestones into a coherent and traceable system. Your responsibilities will include:
Technology Maturation & Readiness
Define SEALER’s TRL framework and facilitate Technology Readiness Assessments (TRA) across programs.
Identify critical technologies and characteristics that influence system maturity and risk.
Develop and maintain Technology Maturation Plans (TMP) together with system engineers and subject matter experts.
Verification & Validation Strategy
Define how analysis, inspection, testing, and demonstration activities contribute to structured TRL advancement.
Establish method selection and qualification approaches aligned with system architecture.
Coordinate maturation efforts and validation resources across concurrent SEALER development streams.
Integrate Technology Maturation Plans into the Integrated Product Development Roadmap (IPDR).
Ensure readiness progression aligns with stage-gates and V-model design milestones.
Support Design Verification Planning (DVP), maturation reviews, and structured progression between development phases.
Where This Role Can Take You
You will play a key role in shaping how SEALER technologies mature from early-stage concepts to fleet deployment. As the V&V organization grows, this role can evolve into functional leadership of Advanced Validation Engineers or broader portfolio-level technical leadership within SEALER’s development.
Who You Are
You are a systems-oriented engineer who enjoys working at the intersection of technology development, validation, and structured product maturation. You bring strong technical depth, a thoughtful and structured approach, and the ability to translate complex engineering topics into clear and actionable maturation pathways across a portfolio.
We believe you have:
A relevant engineering degree (nuclear, aerospace, mechanical, systems engineering, or similar).
Experience with Technology / Manufacturing Readiness Levels (TRL / MRL), Technology Readiness Assessments (TRA), or similar readiness frameworks.
Strong background in systems engineering and structured product development.
Experience in (S-/D-) FMEAs and identifying critical technologies and defining structured maturation and design verification/validation plans (DVP&R).
Understanding of stage-gate models, concurrent engineering, and V-model development.
Strong analytical thinking and the ability to structure complex topics.
Clear communicator and effective collaborator across disciplines and programs.
Background in nuclear, aerospace, or other highly regulated industries preferred.
Comfortable contributing in a dynamic and evolving development environment.
Location
The position is based in Stockholm, with travel to Oskarshamn and partners expected.
What we do at Blykalla
At Blykalla, we're transforming the future of nuclear power by developing innovative Small Modular Reactors (SMRs). Our mission is to create a new generation of nuclear energy systems that are safer, more efficient, and environmentally friendly. As Sweden's only developer of SMRs, we're at the forefront of a groundbreaking industry.
The role
You will take ownership of the steam generator - one of the most critical components in our SEALER reactor, sitting at the interface between the lead-cooled primary circuit and the power conversion system. You are the system-responsible engineer: defining what it must do, how it should be designed, and who builds it.
The role spans the full engineering lifecycle — from writing requirements and leading trade-off studies, through detailed design, manufacturing coordination, and qualification. You will combine sharp mechanical engineering judgment with the ability to align people, suppliers, and analyses toward a common technical goal.
What you'll get to do
Your work spans three interconnected areas.
On the requirements and design basis side, you will define the steam generator's functional and design requirements, develop and maintain the design basis documentation, and lead trade-off studies on configuration, materials, and manufacturing approaches.
On the mechanical design side, you will drive decisions on component architecture, assembly sequences, weldability, inspectability, and manufacturability — making sure the design is practical to fabricate, transport, install, test, and maintain.
On the thermal-hydraulic and structural side, you will not run complex simulations yourself, but you will be the one asking the right questions: defining calculation scopes, providing inputs to analysts, and critically reviewing results. You should be comfortable performing hand calculations to sanity-check outputs and steer design iterations.
On the coordination side, you will define the scope and technical content of supplier work packages, evaluate proposals and deliverables from manufacturers, lead design reviews, and keep component development aligned with plant requirements and the project schedule — working across internal teams as well as academic and industrial partners.
Who you’ll get to work with
The System Engineer - Heat Transfer Equipment sits within our Fluid Systems Engineering team at Blykalla, reporting to Federico Barbano. You will collaborate closely with thermal-hydraulic analysts, mechanical and system engineers and procurement team — as well as external suppliers and research partners.
We are a diverse team that is passionate about our work and about Blykalla.
Who you are
We are looking for a candidate with up to five years of professional experience. There are a few things we think will help you succeed in this role:
Degree in mechanical, energy, chemical, nuclear engineering or a closely related discipline
A meaningful portion of your experience spent at a heat exchanger or pressure equipment manufacturer - ideally in a role combining thermohydraulic and mechanical design with production engineering and workshop interface
Strong working knowledge of heat exchanger mechanical design (ideally steam generators) and applicable design codes and standards such as ASME, PED, or RCC-M
Thermal-hydraulic and heat transfer fundamentals sufficient to steer and critically review calculations performed by others - including the ability to perform hand calculations to sanity-check results
Comfort writing clear technical specifications, reviewing deliverables critically, and communicating effectively with both internal colleagues and external suppliers
Familiarity with CAD tools and engineering software
Fluent in English, spoken and written
Nuclear experience is welcome but not required — candidates from oil and gas, power generation, petrochemical, and similar industries are highly relevant.
Meritorious
Hands-on experience with steam generators or shell-and-tube heat exchangers
Experience with FEA or CFD — the priority is the ability to define, commission, and review such analyses rather than execute them
Prior experience coordinating multidisciplinary design work or managing supplier technical interfaces
Background in the nuclear industry
If you are not sure that you are 100% qualified but are up for 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 be at the forefront of revolutionizing nuclear power. Join and help us shape the energy landscape of tomorrow. Apply today with your resume and a cover letter highlighting your relevant experience and achievements.
We offer competitive compensation aligned with our internal salary framework and growth potential in the role.
Yrken med teknisk inriktningCivilingenjörsyrken inom maskinteknik
Ej specificerad•Heltid•Publicerad: 16 juni•Sista ansökan: 1 sep.
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
As a Rotating Machine Lead Engineer, you will own the rotating equipment portfolio of the SEALER plant — from the Primary Coolant Pumps (PCPs) submerged in molten lead above 400 °C, where conventional bearing and sealing solutions don't apply, to the secondary-side feedwater and condensate pumps and the full set of auxiliary and safety-related pumps the plant requires. It is a technically demanding portfolio that spans genuinely novel engineering on the primary side and rigorous nuclear-grade discipline throughout:
Define functional and design requirements for the full rotating equipment portfolio — PCPs in molten lead, secondary-side feedwater and condensate pumps, and all auxiliary, safety-related, and service pumps.
Develop design basis documentation and lead trade-off studies on pump configuration, drive arrangement, sealing strategy, and bearing technology.
Set priorities across the portfolio — distinguishing where Blykalla-specific engineering is warranted from where standard industrial solutions suffice.
Act as Blykalla's technical counterpart to pump suppliers and engineering partners, challenging design choices and steering solutions to fit plant requirements across hydraulics, sealing, materials, and maintainability.
Define the scope of hydraulic, rotordynamic, and structural analyses; brief specialists; and critically review their outputs. Use hand calculations to sanity-check results.
Own supplier work packages: evaluate proposals, lead design reviews, and keep pump development aligned with plant requirements and schedule.
Support test rig development when needed to advance tailor-made pumping solutions.
Collaborate across internal teams and with academic and industrial partners.
Who’ll you’ll get to work with
The Rotating Machine Lead Engineer sits in the Fluid Systems Engineering Team within Blykalla, and reports to the Manager of Fluids Engineering. 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 for you to succeed in this role, these are:
More than 5 years of professional experience as a rotating equipment engineer.
Degree in mechanical, energy, nuclear, or a closely related discipline.
A meaningful portion of your experience at a pump manufacturer or rotating equipment OEM, ideally in a role combining hydraulic and mechanical design with workshop and field interface, or equivalent experience as a discipline lead on the operator or EPC side.
Strong working knowledge of centrifugal and/or axial pump design, including rotordynamics, bearing selection, mechanical seals or seal-less concepts, and applicable design codes and standards such as API 610, API 682, ASME III, PED, or RCC-M.
Hydraulic and mechanical fundamentals sufficient to steer and critically review calculations performed by specialists, including the ability to perform hand calculations on head, NPSH, power, and basic rotordynamics to sanity-check results.
Comfort writing clear technical specifications, reviewing supplier deliverables critically, and managing a multi-vendor technical dialogue from concept through qualification.
Familiarity with CAD tools and engineering software.
Fluent in English, spoken and written.
Fluency in Swedish is a plus.
Meritorious skills:
Hands-on experience with heavy liquid metal pumps (lead, lead-bismuth, sodium).
Experience with reactor coolant pumps in light-water reactors.
Experience with high-pressure feedwater or boiler feed pumps in conventional or nuclear steam plants.
Familiarity with magnetic drives, canned-motor pumps, or other seal-less concepts.
Experience with rotordynamic, CFD, or FEA analyses; the priority is the ability to define, commission, and review such analyses rather than execute them.
Prior experience coordinating multidisciplinary design work or managing supplier technical interfaces.
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?
Take the chance to be at the forefront of revolutionizing nuclear power. Join our team as Rotating Machine Lead 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.
Yrken med teknisk inriktningCivilingenjörsyrken inom maskinteknik
