Senior Optical Engineer

Senior Optical Engineer
This is a future role. We're building a shortlist now and will contact you when it opens. About us Foundational is building the most precise picture of Earth and orbit, using lasers fired from the ground. We call it ground truth for orbit. We design and run low-cost, autonomous satellite laser ranging stations. They measure the distance to satellites with extreme precision, day and night. Our data platform turns those measurements into tracking data and orbit products for satellite operators, space agencies and governments.

We also build our own flight-proven laser retroreflector arrays, so any satellite can be tracked. Our station network is expanding across continents. The data supports resilient navigation, Earth observation and the safe, sustainable use of space. We're a small, fast-moving team of engineers, scientists and operators in London. We're backed by venture investors and supported by ESA, the UK Space Agency, and Innovate UK. Position Overview London · Full time · On-site You'll own optical design across our laser ranging stations, optical tracking systems and retroreflector products.

This is a hands-on senior role. You'll set the architecture, run the analysis and be in the lab when it's built.

What you'll do Lead optical design for transmit and receive paths, from requirements and tolerancing through to verified hardware
Design and test optics for tracking satellites in daylight and at night
Support the design and test of retroreflector arrays for LEO and MEO missions
Run trade studies with suppliers on telescopes, windows, coatings and filters
Mentor graduate and junior engineers, and set our standards for optical design and test
Write technical content for ESA and customer programmes
What you'll bring Extensive experience in optical engineering, ideally on astronomical, laser, defence or space instruments
Strong skills in optical design software (Zemax OpticStudio, CODE V or similar) and in tolerance analysis
Hands-on alignment, metrology and test experience (interferometry, wavefront sensing, radiometry)
A working knowledge of high-power laser optics: coatings, contamination and damage thresholds
Clear technical writing for design reviews and bids
Nice to have Experience with satellite laser ranging, lidar, free-space optical comms or adaptive optics
Stray light analysis
Observatory or telescope experience
ECSS or ESA project experience

What We Offer A high-impact role with real ownership at an early-stage, venture-backed spacetech company
EMI share options (UK employees)
25 Days Annual Leave + Bank Holidays
Enhanced Parental Leave
Cycle to work schemes
Work alongside engineers and scientists across optics, lasers, software and astrodynamics
Offices in central London, with snacks, tea, coffee and regular socials
We actively champion underrepresented groups and seek to bridge gaps in our workforce. If you're excited by the role but don't match every point, or you’re seeking a part time role, please apply anyway and add a note into your application. Building the best team is our priority.