Senior Mechanical Engineer (£70k-£90k + Equity) at Seed-stage synthetic fuel startup

Job Title

Senior Mechanical Engineer

Salary

£70k-£90k + Equity

Company Description

Seed-stage synthetic fuel startup decarbonising heavy industry through first-principles hardware engineering

Job Description

You will own the end-to-end design and manufacture of critical hardware sub-systems, including reactors and electrolysers. Tasked with making synthetic fuel cheaper than fossil fuels, you will rethink low-volume technologies for mass production. This role involves everything from concept generation and CAD to hands‑on fabrication and commissioning in our London workshop.

Location

London, UK

Why this role is remarkable

• Radical engineering freedom to rethink complex systems from first principles, stripping away complexity to achieve ultra‑low‑cost mass manufacturing.
• Extraordinary team culture of hands‑on builders, featuring engineers from elite motorsports, rocketry clubs, and world‑class institutions like Imperial and Cambridge.
• Unique relocation and housing benefits, including a £6,000 annual subsidy to live near the HQ, ensuring you are at the heart of the action.

What You Will Do

• Lead the architecture and technical requirement capture for major sub-systems like DAC modules or high-pressure electrolyser stacks.
• Design and execute rapid, low-cost test rigs to validate underlying physical hypotheses and iterate hardware based on real-world data.
• Manage the full lifecycle from SolidWorks CAD models and workshop fabrication to the final assembly, integration, and commissioning of fuel plants.

The Ideal Candidate

• Has 5+ years of professional mechanical or aerospace engineering experience with a proven track record of delivering complex hardware systems.
• Possesses deep expertise in SolidWorks and DFM/DFA, complemented by hands‑on workshop experience in fabrication, welding, or prototype assembly.
• Demonstrates strong fundamentals in thermofluids, heat transfer, and simulation tools like Python, FEA, or CFD to solve high-stakes engineering problems.

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