Backend Developer

E2B is a fast-growing Series A startup with 8-figure revenue. We've raised over $37M since our founding in 2023. Our customers include companies like Microsoft, Perplexity, Hugging Face, Manus, and Groq. We're building the next hyperscaler for AI agents.

• Owning the Go services behind the dashboard and SDK — APIs, data models, and the contracts the frontend builds on
• Designing auth/authorization, billing, and usage-metering surfaces
• Building the real-time backends (WebSockets, SSE) that feed sandbox logs and metrics to the dashboard
• Optimizing data access and server-side performance — query design, caching, response times
• Partnering closely with dashboard engineers to ship features end-to-end, and with Core/Platform on the boundaries where product meets infrastructure
• Making architectural decisions around observability, testing, and security best practices

• 3-5+ years shipping production backend services, with deep expertise in Go
• Strong API design — REST/RPC, contracts, versioning, and an eye for the interface the frontend actually needs
• Solid with PostgreSQL: schema design, query optimization, migrations, and reasoning about data at scale
• Backend fundamentals: authentication/authorization, server-side performance, and building real-time data flows (WebSockets, SSE)
• Working TypeScript (Next.js is a plus) competence — you won't live here, but you can move into the app-router frontend to wire up a feature end-to-end and not be lost
• Understand data fetching patterns on frontend side
• Excited to work in person from Prague on a devtool product
• Ownership mentality: you see projects through from conception to launch to iteration
• Comfortable talking to customers and explaining technical tradeoffs
• Not being afraid to take ownership of your part of the product
• Great communication, curiosity, and interest in the AI space

• We offer healthcare, vision, and dental insurance, unlimited PTO, 401k, and a variety of perks for in-office employees