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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Engineer for Peripherals - **Company:** MAGNOTHERM Solutions GmbH - **Location:** Darmstadt, Germany - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Computer-Aided Design, Integrated Development Environments, Systems Integration, Performance Testing, State Machines, Peripherals - **Published:** August 7, 2026 - **Apply:** https://de.indeed.com/viewjob?jk=c416284d11321312 ## About the Role * Degree in mechanical, process, or energy engineering with strong thermo-fluids fundamentals; 5+ years designing thermal-hydraulic systems in hardware that shipped - chillers, heat pumps, process cooling, plant engineering, or similar. * Hydraulic system design at machine scale: piping, pumps, valves, reservoirs, instrumentation - and the pressure-drop and heat-balance calculations behind them. * Heat-exchanger and heat-rejection competence: sizing, selection, and integration of air- and water-side heat exchange at industrial capacity. * System integration experience: you've owned a machine-level design with electrical, software, and structural contributors, and held interfaces between parallel workstreams. * Team leadership: you've led a small engineering team through design, build, and commissioning - planning, delegation, reviews, and the accountability that goes with it. * Efficiency mindset: you think in COP, part-load behavior, and parasitic losses, and you can defend a design-point choice with numbers. * Working style: hands-on lead who still opens the CAD and walks the build floor, clear documentation, calm under integration pressure. English language skills (C1+), German language skills (C1+). Nice to have * Refrigeration or heat-pump system design background (including natural-refrigerant or water-based systems). * Controls literacy: you can read a state machine and a piping & instrumentation diagram (P&ID) with equal comfort, and speak the software team's language. * Commissioning experience: fill/flush, hydraulic balancing, electrical bring-up, performance testing of large thermal systems. * Experience with container-format or skid-built plant: transportability, lifting, site installation. * Familiarity with the relevant standards landscape for chillers and pressure/electrical safety. * Prior work in a startup or first-of-kind development environment. ## Description Our STELLAR program builds them big - and while the magnetocaloric core gets the headlines, the machine around the core is what makes it a product: hydraulics, heat rejection, power and control electronics, software, and the container-format frame that carries it all. That platform is one machine that hosts every generation of our magnetocaloric core: the core is swapped out, the platform stays. You lead the team that builds it - electrical, thermo-fluid, structural, and design engineers - delivering the thermal-hydraulic architecture, the system's efficiency, and the platform every other team docks onto. If the core is the heart, you build everything else - and you own how well the whole machine performs. What you'll own: * Thermal-hydraulic architecture. The system's fluid backbone: circuit topology, flow rates and pressure heads at the design point, reservoir/pump/recooler placement, and the design trade-offs that decide the machine's efficiency. System efficiency - coefficient of performance, COP - is won or lost in your loop - pump power and temperature approaches are your budget to defend. * Heat rejection. Sizing and specification of the large air-cooled recooler - one of the program's major long-lead procurements - plus its integration: mounting, air paths, ducting, acoustics. * Platform integration & interfaces. The platform hosts a swappable core unit and must serve every machine generation without redesign. * Efficiency & component performance. Own the component-benchmarking program, including the pump-efficiency campaign that settles one of the program's biggest open questions - how much power the pumps really cost us - and the component down-selects that follow from it. * Electronics & software oversight. Your team delivers power electronics, cabinets, safety interlocks, and the platform control software (state machine, monitoring, HMI, customer building-automation protocols). * Team leadership & project management. Lead your team: plan and schedule its work, track budget and material spend, drive the long-lead procurement together with our procurement manager, and report progress and risks into the program's rhythm of sprints, weekly cross-team reviews, and design reviews., * One platform, every generation: the machine you build hosts the entire development program - each step swaps in a new core, and your platform is what makes that a week's work instead of a redesign. * Efficiency is the product: the company's pitch is performance; the loop, pumps, and heat rejection you own are where the claimed numbers become measured ones. * Real team, real authority: a dedicated team of specialists is yours to lead, inside a lean program that keeps its central overhead thin and pushes decisions down to the people doing the work. * From rig to product: your frame and loop run open as the program's test rig first and become the shipped product's backbone later - you design for both from day one. What you will get from the job * Flexible hours and 30 days of vacation. * Compensation aligned with startup standards, with room to grow as the company scales. * A team that's sharp, interdisciplinary, and doesn't take itself too seriously. * The chance to pioneer technology that actually helps the planet. * Ownership, responsibility, and a culture where learning from mistakes is expected. * A front-row seat as a deep-tech company scales. * Memes. Good ones. 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