Atomic Semi Inc.

Reimagining the Semiconductor Fab

Atomic Semi, founded by YouTube chip-making sensation Sam Zeloof and legendary silicon architect Jim Keller, is on a mission to radically simplify semiconductor manufacturing. Instead of relying on massive, multi-billion-dollar facilities that take years to build, Atomic Semi is designing miniaturized, fast, and highly automated micro-fabs. By owning the entire stack—from atoms to architecture—the company aims to produce custom, affordable chips in a matter of hours rather than months. Backed by heavyweights like the OpenAI Startup Fund and notable angels, they are challenging the industry's long-standing paradigms.

A Culture of Radical Invention

The engineering culture at Atomic Semi is profoundly hands-on and optimistic. "Smaller is better. Faster is better. Building it ourselves is better" is not just a tagline; it's the operational philosophy. Engineers here are makers who aren't afraid to get their hands dirty. The team has set up 3D printers, e-beam writers, and an array of microscopes, with a clear mandate: if a tool is missing or inadequate, they will invent it along the way. It's an environment that rewards deep technical curiosity, first-principles thinking, and a willingness to push the physical limits of technology.

What You'll Actually Do

Working at Atomic Semi means touching hardware and software in equal measure. Software engineers might build the central web app that acts as the nervous system for the fab, directly controlling physical robotics and real-time monitoring systems. Mechanical and hardware engineers focus on precision systems, lithography, and automation, dealing with sub-micron positioning and non-standard sensors. Whether you are writing bare-metal Linux code, designing robotic automation, or managing complex physical experiments, your work directly translates to the physical production of silicon chips.

Compensation & Benefits

Atomic Semi offers competitive compensation paired with generous early-stage equity. Base salaries for engineering roles (Software, Robotics, Infrastructure) generally range from $125K to $195K. Specialized hardware and precision mechanical roles typically see base salaries between $105K and $180K. Beyond base pay and equity, the company provides comprehensive health, dental, and vision insurance, a 401(k) plan, and paid parental leave. The onsite experience in San Francisco and Austin is heavily subsidized with daily lunches, dinners three times a week, a fully stocked kitchen, and commuter benefits including late-night Uber rides.

The Interview Process

While public interview data is limited due to the company's early stage, candidates can expect a rigorous, highly technical evaluation process. Given the interdisciplinary nature of the work, interviews likely focus heavily on hands-on problem-solving, system design, and practical engineering skills. Expect to discuss your past projects in depth, particularly those where you had to build tools from scratch or solve critical, early-stage design issues. The process is designed to gauge not just your technical depth, but your alignment with their "maker" culture.

Why Join / Why Not

Why Join: If you are frustrated by the slow iteration cycles of traditional hardware and want to be part of a team attempting a moonshot in semiconductor manufacturing, Atomic Semi is unparalleled. You will work alongside industry legends and have immense ownership over systems that blend software, robotics, and physics.

Why Not: This is a hardcore, onsite hardware startup. The work is demanding, the problems are largely unsolved, and the environment requires a high tolerance for ambiguity. If you prefer the comfort of established playbooks, remote work, or strictly software-focused roles without a physical component, this will not be the right fit.