# Sr Staff/Principal Laser Design Engineer at Lightmatter

- Company: Lightmatter
- What the company does: Rethinking the limits of AI, Lightmatter merges photonics and computing to build a future where speed, efficiency, and intelligence converge. Backed by GV.
- Company website: https://lightmatter.co
- Type: Startups
- Level: Principal and up
- Location: Boston, MA; Mountain View, CA
- Work setup: On-site
- Posted: 2026-09-10
- Apply by: 2026-10-25
- Apply: https://boards.greenhouse.io/lightmatter/jobs/5407374008?gh_jid=5407374008
- Page: https://www.1752.vc/careers/jobs/lightmatter-sr-staff-principal-laser-design-engineer/

## About the role

If you're passionate about tackling complex challenges, making an impact, and being an expert in your craft, join our team of brilliant scientists, engineers, and accomplished industry leaders.

## What they're looking for

- Deep, hands-on expertise in semiconductor laser and epitaxy design for III-V compound semiconductor devices
- Proven track record designing DFB, DBR, and/or external-cavity lasers
- Strong grounding in laser physics and semiconductor device physics (optical gain, threshold, slope efficiency, RIN, linewidth, thermal rollover, and back-reflection behavior)
- Proficiency with physics-based laser and photonic device simulation tools (e.g., PhotonDesign Harold/PICWave, VPIphotonics, Lumerical, or equivalent) and data analysis in Python
- Demonstrated ability to independently own complex designs spanning multiple programs, and to resolve critical, ambiguous technical issues as a recognized subject-matter expert
- Track record of close collaboration with characterization/test teams and cross-functional hardware teams

Tags: Photonics & Silicon Engineering