Executive Assistant & Office Manager

Company: Blacksmith
Location: San Francisco
Posted on: April 1, 2026

Job Description:

About Blacksmith We started by building infrastructure to run CI workloads really fast. Our first product helps companies run GitHub Actions substantially faster and cheaper by owning and operating our own global fleet of bare-metal machines rather than renting generic cloud VMs. Today, we orchestrate tens of millions of Firecracker VMs each month, running CI for 2,000 companies and hit ~$10M in ARR in less than 2 years. We operate thousands of bare-metal machines across multiple regions, regularly schedule 50k vCPUs concurrently, and run a petabyte-scale Ceph cluster that we manage ourselves. We’ve raised $13.5M across Seed and Series A, led by Google Ventures (GV), and we’re intentionally building a small, but exceptional team. Blacksmith was founded by a team with deep systems and scaling experience, including building search/ads infrastructure at Faire, and operating large distributed systems at Cockroach Labs. Our GTM is led by Jon Boyer, formerly Head of Sales at Zapier. We’re now extending the same CI infrastructure into a broader platform: running agent sandboxes at scale and building our own background coding agent on top of it. The role We’re looking for someone to work directly with me (co-founder & CEO) and also run our SF office. This is a mix of executive assistant and office lead. You’ll handle the day-to-day stuff that keeps things unblocked, and also make the office a place people actually like being in. If things are running well, people shouldn’t have to think about logistics at all. That’s the bar. Working with me (EA side) Manage my calendar and scheduling Help triage email and keep things moving Book travel and handle logistics Help with random things that come up (this will vary a lot) Keep me organized and on top of things Running the office Set up and improve the SF office over time Furnish and decorate it so it actually feels like a good place to work Keep everything stocked (food, snacks, supplies, etc.) Handle new hire setup (desks, equipment, onboarding logistics) Coordinate deliveries, vendors, and anything operational Making it a great place to be Plan events, team dinners, off-sites, etc. Make the office feel welcoming and high-energy Help people when they need things Notice gaps and fix them without being asked You’re a good fit if You’re very organized and reliable You’re proactive; you don’t wait to be told what to do You have good judgment and can prioritize well You have experience working at a high-growth startup You like being around people and making things run smoothly You’re comfortable working closely with a founder You want to be in-office in SF 5 days/week Bonus You’ve done EA, office management, or ops before You’ve worked at a startup You have good taste and care about how spaces feel Compensation & benefits Competitive salary equity Health, dental, vision 401k match Unlimited PTO Annual offsite Early exercise

Keywords: Blacksmith, Fremont , Executive Assistant & Office Manager, Administration, Clerical , San Francisco, California