About OLIX
OLIX is developing the next generation Optical Tensor Processing Unit (OTPU) with high performance and energy efficiency.
The Role
Senior Laser Engineer – responsible for leading the design and production of VCSEL devices for integration into OTPU systems. The role focuses on III‑V semiconductor lasers from epitaxial design to reliability.
Responsibilities
- Own the design and development of VCSEL devices and arrays for high-density optical systems
- Define and optimise epitaxial layer structures including quantum wells, DBRs, oxidation layers, and current confinement schemes
- Work with external epitaxy suppliers and foundries to specify, review, and iterate wafer growth runs
- Drive device simulation across optical, electrical, and thermal domains
- Characterise fabricated devices including LIV, spectral behaviour, modulation bandwidth, efficiency, thermal rollover, and reliability
- Develop strategies for current confinement, high-speed modulation, and array uniformity
- Collaborate with electronics teams on driver integration and impedance considerations
- Interface with packaging and optics teams to ensure coupling efficiency, mechanical tolerance robustness, and thermal performance
- Establish reliability methodologies including accelerated life testing and failure analysis
- Contribute to multi-generation device roadmaps aligned with system architecture requirements
- Support transfer from R&D to pilot and volume manufacturing
Required Skills & Experience
- 7+ years of experience in semiconductor laser development, with strong emphasis on VCSELs
- Degree in Physics, Electrical Engineering, Materials Science, or related discipline
- Deep understanding of III‑V materials systems such as GaAs/AlGaAs or InP-based structures
- Understanding of epitaxial techniques such as MBE or MOCVD
- Deep familiarity with high-speed modulation and bandwidth limitations
- Understanding of thermal management in dense laser arrays
- Experience working with external foundries or epitaxy houses
- Ability to interpret SEM, AFM, and other device-level characterisation data
- Strong cross‑functional collaboration skills
Nice‑to‑have Skills
- Experience with large VCSEL arrays
- Knowledge of reliability standards for datacom applications
- Experience integrating lasers with custom driver ASICs
- Background in yield optimisation and statistical process control
- Python skills
Compensation & Benefits
- Competitive Salary: £126,000 – £154,000 annual salary commensurate with experience, skills, and location.
- Equity & Ownership: Meaningful stock options.
- Proximity Bonus: £24,000 annual Living‑Local Bonus if residence is within 20 minutes of the office.
- Time off: 25 days of annual leave, plus all UK bank holidays.
Legal
Due to U.S. export control regulations, candidates’ eligibility to work at OLIX depends on their most recent citizenship or permanent residency status. The company is generally unable to consider applicants whose most recent citizenship or permanent residence is in certain restricted countries (currently including Iran, North Korea, Syria, Cuba, Russia, Belarus, China, Hong Kong, Macau, and Venezuela). Applicants who have subsequently obtained citizenship or permanent residency in another country not subject to these restrictions may still be eligible.
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