Location: San Francisco (Hybrid: 3 days in SoMA) | Open to London (5 days/month in SF)

Type: Full-Time

Team: Research Tribe

Focus: Agent Systems Engineer

Who we are

We're a team of founders, engineers, researchers, creatives, and operators building what we believe will be one of the defining companies of the AI era.

The hardest part of building products isn’t writing code - it’s predicting human behavior.

Until now, it’s been guesswork. Blok changes that. We simulate real user behavior before anything ships.

Who we are not

• We are not your average SF startup. We’re a diverse team of 20 people - hailing from 10 countries and speaking 10 languages with a range of non-traditional backgrounds.
• We are not remote: We value the energy of solving hard problems on a whiteboard in our SF HQ.
• We are not “researching to learn”: Research and product move in tight, high-velocity loops. If it doesn’t become code to solve a customer problem, it doesn't exist.

How we work

We operate under Blok OS - a playbook for how we build, collaborate, and make decisions in a high-velocity environment:

• Anchor Days: We’re in the SF HQ (SoMA) 3 days/week (Mon, Tues, Thurs) to solve hard problems together.
• Core Collaboration Hours: We’re online 9-11am PT daily so the whole team (SF ↔ UK) can collaborate in real time.
• Deep Work: Outside of that, we protect uninterrupted time to build.

What you’ll own & build