Machinist

About fab2 The fab2 team can build anything. We design all the hardware and software needed to make chips and we make the fabs, tools, and components ourselves. We’re looking for exceptional, hands‑on people who can iterate to the limits of what’s possible. About the team The fab2 production team manufactures chip fabs. From deposition and etching tools to lithography and metrology, we are building every tool ourselves. We fabricate the metal parts, operate SMT lines to build PCBAs, and assemble the tools in‑house. About the role fab2 is building a new generation of semiconductor manufacturing equipment. We’re staffing up our first production facility, and the CNC programmer is the seat that decides how fast we can build them. You own the CAM programs that run our Haas fleet — three UMC‑500SS five‑axis VMCs, one UMC‑750SS, two DS‑30Y mill‑turn lathes. Today our chassis‑mix mill cycle is ~45 min/part. Your year‑one target is to drop that to 20 min/part through better toolpaths, smarter fixturing, optimized tool selection, and disciplined process documentation. That single number controls how many cubes we can ship per month. Responsibilities Day‑to‑day operation of Haas UMC‑500SS (×3) and UMC‑750SS 5‑axis VMCs, plus DS‑30Y dual‑spindle Y‑axis lathes Setup, first‑article inspection, in‑process gauging Tool loading from the Haas presetter Pallet‑pool management on the UMCs (lights‑out queue) Bar feeder setup and material changeover on the DS‑30Y Reading prints, holding tolerances on stainless and aluminum (typical ±0.005") Required Experience 3+ years CNC machining experience, including at least 1 year on 5‑axis Haas control fluency (or comparable Fanuc) Ability to read GD&T and inspect to print Ability to own offsets and edits at the machine Nice‑to‑have Mastercam, Fusion 360, or HSMWorks programming Renishaw probing Bar‑fed lathe with sub‑spindle (DS‑30Y, ST‑25Y, etc.) Mill‑turn / live‑tooling on lathes Working at fab2 We’re an early‑stage hardware startup with solid funding, world‑class advisors, and a lab/office in San Francisco, CA. Benefits Medical, Dental, and Vision insurance Generous Paid Time Off inclusive of Holidays and Sick Time Visa Sponsorship Life and Disability Insurance Paid Parental Leave 401(k) retirement plan Weekly Learning & Development opportunities Commuter Benefits including Parking and Late Night Uber rides from the office Lunches daily, Dinners 3x per week, Stocked Office Kitchen with Snacks and Spindrifts We are an equal‑opportunity employer and do not discriminate on the basis of race, religion, national origin, gender, sexual orientation, age, veteran status, disability or other legally protected statuses. Export Control Analysis This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. fab2, formerly known as Atomic Semi #J-18808-Ljbffr Atomicsemi