Back End Developer

Locke44 are proud the be partnered with an early-stage, VC-backed startup on a mission to teach AI how to use the internet. Think: thousands of autonomous agents navigating the web, at scale. We’re looking for a sharp Back End Engineer to help build the core systems powering this vision.

You’ll architect scalable simulations, ship production-ready integrations with cutting-edge ML, and shape the product from the ground up.

What You’ll Be Doing:

• Build back end systems to simulate complex browser interactions at massive scale
• Power dashboards that track and explain agent performance and failure
• Collaborate with ML/RL researchers to deploy cutting-edge models into prod
• Shape product, tech stack, and engineering culture from Day 1

What You Bring:

• Strong with Python or Go, and backend systems that scale
• Experience with GraphQL, HTTP/2/3, WebSockets, and distributed architectures
• Familiarity with browser automation: Selenium, Playwright, Puppeteer, etc.
• Bonus: web scraping tools like Scrapy, or experience with ML/data pipelines
• Curious, fast-moving, product-minded, and love solving hard problems

Full spec available, please apply to Locke44 for the details