Stephen Lin is Co-Founder at Advanced Metal Research, a Y Combinator-backed startup building machine intelligence for American welding, based in Los Angeles, CA.

Stephen previously worked at NASA on spacewalks and planetary exploration, where he built systems used by mission control for 19 spacewalks, enabling real-time telemetry and monitoring of extravehicular activities.

Stephen brings a rare combination of aerospace-grade engineering rigor and industrial manufacturing expertise to the challenge of modernizing American metal fabrication.

At Advanced Metal Research, Stephen co-founded the company alongside Julian Fried and Angus Muffatti, applying machine intelligence to robotic welding equipment for the domestic manufacturing sector.

Advanced Metal Research, part of the Y Combinator 2025 cohort, is at the forefront of reindustrializing American welding through AI-driven automation, targeting a critical and underserved segment of the manufacturing industry.