Product Engineer - Backend Developer
E2B
About E2B
E2B is a fast-growing Series A startup with over $37M in funding and 8-figure revenue. We are building the Agent Cloud and power the infrastructure behind AI labs and some of the most widely used consumer and enterprise agents, including Manus, Genspark, Lindy, ClickUp, Groq, and Black Forest Labs. Our team includes original authors of Firecracker, the AWS microVM technology powering Lambda, along with alumni of Cognition, JetBrains, Zapier, and Wish.
About the role
Your job will be to own and scale the backend that powers the E2BDashboardand SDK - the APIs, data, and services developers rely on to run, monitor, and debug their sandboxes. You're the backend counterpart to our dashboard engineers: they own the experience, you own the services and data behind it, and together you ship product end-to-end.
This is product/application backend - APIs, data layer, auth, billing, usage metrics, real-time log/metric pipelines. It is not our low-level infrastructure (Firecracker, orchestration, the sandbox runtime) - that lives with our Core and Platform teams, who you'll integrate with but not duplicate.
The split is roughly 80% Go backend, 20% TypeScript - you live in Go, but you're comfortable dropping into the Next.js app to wire things up end-to-end and unblock the frontend rather than throwing work over a wall.
You'll build enterprise-grade services that scale to 100k+ weekly active users. Responsibilities include:
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
This role requires a high amount of ownership and the ability to take projects from 0 to 1. You'll have deep autonomy to make backend and product decisions. If you see a better way to build something, you build it.
What we're looking for
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
If you join E2B, you'll get a lot of freedom. We expect you to be proactive and take ownership. You'll be taking projects from 0 to 1 with the support of the rest of the team.
What it’s like to work at E2B
We’re a fast-growing startup with in-person (4 days on-site, 1 day WFH) offices in San Francisco and Prague, Czech Republic. We already generate 8-figure revenue and work directly with top-tier AI companies like Groq, Manus, Hugging Face, Lindy, and other exciting teams pushing the frontier of AI.
We offer healthcare, vision, and dental insurance, unlimited PTO, 401k, and a variety of perks for in-office employees.