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Prototype Machinist

Atomic Semi

San Francisco, CA

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JOB DETAILS
SALARY
$105,000–$125,000 Per Year
SKILLS
Assembly Equipment, Automation, CAD/CAM (Computer-Aided Design/Computer-Aided Manufacturing), CNC (Computerized Numerical Control) Systems, Communication Skills, Computer Hardware, Dental Insurance, Disability Insurance, Electricity, Funding, Geometric Dimensioning and Tolerancing, Lathe, Life Insurance, Machining, Printers, Prototyping, Semiconductors, Startup, Surface Mount Technology, System Integration (SI), Team Building, Team Lead/Manager, Vision Plan, Writing Skills
LOCATION
San Francisco, CA
POSTED
Today
About Atomic Semi

Atomic Semi is building a small, fast semiconductor fab.

It's already possible to build this with today's technology and a few simplifications. We'll build the tools ourselves so we can quickly iterate and improve.

We're building a small team of exceptional, hands-on engineers to make this happen. Mechanical, electrical, hardware, computer, and process. We'll own the stack from atoms to architecture. Our team is optimistic about the future and we want to continue pushing the limits of technology.

Smaller is better. Faster is better. Building it ourselves is better.

We believe our team and lab can build anything. We've set up 3D printers, a wide array of microscopes, e-beam writers, general fabrication equipment - and whatever is missing, we'll just invent along the way.

Atomic 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

Our tools are designed in-house, machined in-house, and assembled in-house. The Production team owns everything from CNC machining and SMT to tool assembly and system integration, and we're scaling the number of concurrent builds, work centers, and staff significantly in 2026.

About the role

The Prototype Machinist is responsible for creating new programs, organizing tool libraries, creating set-up sheet templates, and communicating effectively to machinists via program notes, setup sheets, and/or verbal instructions. This is a unique opportunity to work with unconventional setups to push the boundaries of production and automation.

Responsibilities
  • Create new programs and organize tool libraries
  • Create setup sheet templates
  • Lead communication and planning efforts with machinists and technicians
  • Help create and manage a tool-and-work holding system that is flexible to various parts, constraints of size, and available axis
  • Hands-on guidance and training of machinists and assembly technicians as required
Required Experience
  • 3+ years of experience programming for multi-axis machining
  • 3+ years of experience working with Haas CNC 4-axis machine and lathe
  • Professional experience working with or reading G code
  • Professional experience interpreting GD&T drawings
  • Professional experience running manual machines
Nice-to-have
  • 3+ years of experience programming with Fusion 360 for multi-axis machining
  • Professional experience programming with various CAM programs
  • 5+ years of professional experience running Haas, Fanuc, Siemens, and/or Mazak Machines
  • Professional experience making custom tools to finish or expedite a job
  • Professional experience with CAD fixtures and any custom items needed to machine parts
Working at Atomic Semi

We're an early-stage hardware startup with solid funding, world-class advisors, and a lab/office in Austin, TX and San Francisco, CA.

Compensation: Atomic Semi is committed to fair and equitable compensation practices. The annual salary range for this role is $105,000 - $125,000. Compensation is determined based on your qualifications and experience. Our total compensation package also includes generous equity in Atomic Semi.

Benefits: Atomic Semi offers the following benefits, subject to applicable eligibility requirements:
  • 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.

About the Company

A

Atomic Semi

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