Mechanical Engineer - Precision Systems

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. fab2 was founded by Sam Zeloof and Jim Keller. Sam is best known for making chips in his garage, and Jim has been a leader in the semiconductor industry for the past 40 years. About the team The Positioning Team operates on the nanometer scale. We make lithography, metrology and motion systems that pattern, inspect and characterize our chips in order to push our process to lower nodes. About the role We are seeking a highly skilled and hands‑on Mechanical Engineer to join our team. You will be responsible for designing, prototyping, and building the mechanical systems in our semiconductor fabrication equipment, from stages and frames up to complete systems. This role is for someone who has internalized precision machine design as a discipline and has a proven track record of rapidly prototyping complex precision systems and advancing them to the next stage of production. Our philosophy is to get things built and tested in days or weeks, not months. Because of this, a portfolio is generally required to apply: show us the things you’ve actually built! Responsibilities Design and iterate on precision machines, motion stages, structural loops, metrology frames, opto‑mechanical mounts, test fixtures, and inspection tooling targeting sub‑micron to nanometer performance Lead mechanical system integration, alignment procedures, and cross‑team coordination with electrical, controls, and optics engineers Drive mechanical design of frames, stages, and assemblies with GD&T, tolerance analysis, and a practical eye toward manufacturability and assembly Rapidly prototype, build and characterize new designs on the bench using a variety of tools and characterization equipment Select and integrate precision components: bearings, encoders, interferometers, actuators, isolators, and dampers Develop error budgets and tolerance stack‑ups; identify and mitigate dominant error sources (thermal, vibrational, structural, kinematic) Required Experience 3 years designing and building precision mechanical systems that had to hit real accuracy and repeatability targets Working fluency in precision machine design fundamentals: exact‑constraint design, kinematic couplings, flexures, error budgeting, structural loops, tolerance analysis Hands‑on prototyping, fabrication, assembly, and alignment experience — you're comfortable on a mill, on a granite surface plate, and behind an interferometer Experience selecting and integrating precision components (bearings, stages, encoders, isolators, actuators) Experience with dimensional metrology: interferometry, LVDTs, capacitance probes, autocollimators, and CMMs Nice‑to‑have Formal training in precision engineering Experience at an early‑stage startup Familiarity with firmware, controls, or electrical engineering Opto‑mechanical design and alignment experience Working at fab2 We’re an early‑stage hardware startup with solid funding, world‑class advisors, and offices in Austin, TX and San Francisco, CA. Compensation fab2 is committed to fair and equitable compensation practices. The annual salary range for this role is $115,000 – $180,000. Compensation is determined based on your qualifications and experience. Our total compensation package also includes generous equity in fab2. Benefits Medical, Dental, and Vision insurance Generous Paid Time Off inclusive of Holidays and Sick Time Visa Sponsorship Life and Disability Insurance 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 Fab2