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Senior System Engineer

Thorizon Engineering BV · Amsterdam · Netherlands · On-site

Posted Jul 14, 2026

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Your mission Help realize one of the world's most promising reactor technologies.  As a Senior System Engineer, you will play a key role in the development of Europe's first nuclear molten salt reactor demonstrator. You will take ownership of one or more systems that are essential to the success of the reactor and guide their development from concept to integrated design. You will bring together experts from different engineering disciplines, translate technical challenges into clear engineering solutions, and drive decisions that balance performance, safety, reliability, manufacturability and cost.    This role is about mastering complexity. It requires systems thinking, engineering judgment and the ability to create alignment across multidisciplinary teams. We are looking for engineers who have solved complex engineering challenges and are excited to apply their expertise to a new technological frontier. In this role you will: Lead the development of one or more major systems within the Thorizon Pioneer  programme .  Define,  validate  and manage system requirements throughout the design lifecycle.  Drive system architecture,  integration and interface management across multiple engineering disciplines.  Balance technical trade-offs between performance, safety, reliability, operability,  manufacturability and cost.  Coordinate multidisciplinary engineering activities and bring together specialists to develop integrated solutions.  Initiate and guide analyses, simulations,  testing  and design activities needed to mature your systems.  Identify  technical risks, challenge assumptions and drive engineering decisions based on evidence.  Plan and coordinate verification and validation activities to  demonstrate  that systems meet their intended functions.  Deliver system documentation, prepare design  reviews  and contribute to licensing documentation. Collaborate closely with architects, technical leads, project management  and external partners to  ensure successful integration of your systems.  Contribute to the continuous development of  Thorizon's  systems engineering practices. About you: You enjoy solving problems that have never been solved before. You are comfortable working at the intersection of multiple engineering disciplines and know how to bring structure to technical complexity. You combine analytical thinking with pragmatism and know how to move engineering  work  forward by bringing people together. You  probably hold a  Master's degree in  Engineering or another relevant technical discipline.  You have  significant experience  developing complex engineered systems or products.  Experience in systems engineering, systems  integration or and technical leadership within a multidisciplinary engineering environment.  Experience in industries such as aerospace, defense, energy, industrial equipment, automotive, marine, process industries, or other complex engineering sectors. Nuclear experience is an…