Get AI-powered advice on this job and more exclusive features.
Flux is pioneering a new class of AI accelerators called Optical Tensor Processing Units (OTPUs). Our work environment rewards innovation, speed, and bold thinking.
The Role
We’re looking for a Process Engineer – Optoelectronics to design novel GaAs-based VCSELs, detectors, and passive components that sit at the heart of our OTPUs and develop the rapid-fabrication processes that bring those designs to life. Your mission is to go from CAD to measured die in days, iterate fast, and feed insights directly back into the next design spin.
Responsibilities
* Device design & simulation – create and refine GaAs electro-optical structures; balance optical, electrical, and thermal constraints for first-pass success.
* Prototype-first process execution & optimisation – run quick cycles of thin-film deposition (sputtering / e-beam), UV photolithography, lift-off, dry etch (ICP-RIE / RIE), wet etch chemistries, wafer thinning, and metallisation for GaAs device stacks.
* Process development – plan DOEs, define SPC limits, and establish repeatable recipes that can scale from R&D to pilot.
* Cross-functional collaboration – work side-by-side with IC, packaging, and test teams to ensure devices integrate cleanly with CMOS control and board-level builds.
* Documentation & knowledge sharing – log process changes, run design / process reviews.
* Cross-functional integration – partner with analogue IC, packaging, and systems engineers to ensure seamless GaAs-to-CMOS co-integration.
* Mentorship & reviews – guide junior engineers; run regular process reviews and FMEA sessions.
* Stay ahead of the curve – monitor industry advances in III-V growth, dry-etch chemistries, and photonics packaging to keep Flux at the bleeding edge.
Skills & Experience
* 3+ years of hands-on III-V (ideally GaAs) semiconductor process engineering in ISO 4/5/6 (Class 10/100/1000) cleanrooms.
* Practical experience with at least three of the following: UV photolithography, dry etching of GaAs/AlGaAs, selective wet etching, thin-film sputtering/evaporation, wafer thinning, lift-off metallisation.
* Proven record taking optoelectronic devices (VCSEL, PIN/APD, modulators, or photonic MEMS) from concept to prototype.
* Comfortable with JMP/Python for DOE, SPC, and data visualisation; familiar with ISO-14644, SEMI, and safety protocols for III-V toxics.
* B.Eng./M.Sc./Ph.D. in Materials Science, Electrical Engineering, Physics, or a related field.
* Excellent written & verbal communication; thrive in fast-paced, cross-disciplinary start-up settings.
* Bonus: experience interfacing GaAs dies with flip-chip or SiPh interposers.
* Bonus: Familiarity with numerical simulation tools (e.g., FDTD, RCWA, TCAD, BPM) and optical/electrical characterisation techniques (L-I-V curves, spectral and near-field imaging, high-speed testing).
Details
* Competitive salary ranging from £70k+, depending on experience.
* Stock options in a rapidly growing AI company.
* Based in our new 5,000 square foot office in the AI hub of Kings Cross, London.
* Flux hires candidates within a 45-minute commute of our office—offering an extra £24k/year incentive if you choose to live within 20 minutes. The <45-minute commute is a firm requirement.
* Comprehensive healthcare insurance.
* Private use of our 3D printer.
If you’re excited about building the future of optical-electrical integration and eager to contribute to groundbreaking AI hardware, we’d love to hear from you. Apply now to join Flux and help shape the future of optical computing.
Seniority level
* Seniority level
Mid-Senior level
Employment type
* Employment type
Full-time
* Industries
Semiconductor Manufacturing
Referrals increase your chances of interviewing at Flux Computing by 2x
Sign in to set job alerts for “Process Engineer” roles.
Greater London, England, United Kingdom 3 weeks ago
Hounslow, England, United Kingdom 3 days ago
Carshalton, England, United Kingdom 2 weeks ago
London, England, United Kingdom 5 days ago
Electrical and Instrumentation Technician
London, England, United Kingdom 3 weeks ago
London, England, United Kingdom 1 week ago
London, England, United Kingdom 2 months ago
London, England, United Kingdom 1 month ago
London, England, United Kingdom 2 days ago
Kingston Upon Thames, England, United Kingdom 1 week ago
London, England, United Kingdom 5 hours ago
Richmond Upon Thames, England, United Kingdom 5 months ago
London, England, United Kingdom 1 month ago
London, England, United Kingdom 3 weeks ago
London, England, United Kingdom 1 month ago
London, England, United Kingdom 1 month ago
London, England, United Kingdom 5 days ago
West Drayton, England, United Kingdom 3 months ago
London, England, United Kingdom 2 weeks ago
London, England, United Kingdom 3 days ago
London, England, United Kingdom 4 days ago
London, England, United Kingdom 3 months ago
London, England, United Kingdom 4 weeks ago
London, England, United Kingdom 2 weeks ago
London, England, United Kingdom 1 month ago
Woking, England, United Kingdom 2 months ago
Hertfordshire, England, United Kingdom 1 week ago
London, England, United Kingdom 1 month ago
London, England, United Kingdom 3 months ago
London, England, United Kingdom 2 weeks ago
We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI.
#J-18808-Ljbffr