--- title: 'Product Engineer - Backend Developer at E2B' canonical: 'https://feeny.ai/job/product-engineer-backend-developer-e2b-prague-6a4j1bpy60wh' type: 'job' last_seen: '2026-09-07' --- # Product Engineer - Backend Developer at E2B - **Company:** E2B - **Location:** Prague, Czech Republic - **Compensation:** €80k–€120k - **Employment:** full-time - **Work type:** onsite - **Posted:** 2026-07-17 - **Last confirmed live:** 2026-09-07 - **Apply:** https://jobs.ashbyhq.com/e2b/dea22a97-293e-41af-9fdb-c7e6e2c73b37 ## Job description ## 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 Artificial Analysis. 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 E2B Dashboard https://github.com/e2b-dev/dashboard and 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 Manus, Genspark, Lindy, ClickUp, Groq, Artificial Analysis 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. ## About E2B ## Company Overview - **One-liner**: E2B provides open-source, secure sandboxed cloud infrastructure for AI agents to execute code, access tools, and run autonomously. - **Entity Type**: Private (Series A) - **Headquarters**: San Francisco, California, United States (also office in Prague, Czechia) - **Founded**: 2023 - **Founders**: Vasek Mlejnsky (Co-Founder & CEO), Tomas Valenta (Co-Founder & CTO) ## Core Business - **Primary Industry**: Cloud infrastructure for AI agents, secure code execution, developer tools - **Target Customers**: B2B – Enterprise (Fortune 100), AI startups, LLM providers, and developers building agentic workflows - **Mission / Purpose**: “Build and run AI agents with confidence.” – providing enterprise-grade, open-source environments for agents. ## Products & Services - **E2B Sandboxes** (Cloud): Isolated microVM environments (powered by Firecracker) that start in under 200 ms, support any LLM, and run for up to 24 hours. Used for code execution, data analysis, deep research, reinforcement learning, and computer use agents. Available via BYOC, on-prem, or self-hosted on AWS, GCP, Azure. - **Code Interpreter SDK** (SaaS/API): JavaScript and Python SDKs to run AI-generated code inside sandboxes (`@e2b/code-interpreter`). - **Secure MCPs** (API): Infrastructure for Model Context Protocols with full isolation. - **Desktop Sandbox** (Feature): Provides virtual desktop environments for LLMs (computer use agents). ## Market Standing - **Valuation / Market Cap**: Not publicly available (private company) - **Key Metric**: Total Funding – $35 M (Series A $21 M, Seed $11.5 M, Pre-seed $2.5 M) - **Notable Investors / Partners**: - **Lead Investors**: Insight Partners (Series A), Decibel Partners (Seed), KAYA (Pre-seed) - **Partners**: Hugging Face, Manus (case studies); works with OpenAI, Anthropic, Meta Llama, Mistral, and custom models. - **Growth Signals**: - Headcount grew 169 % YoY to 20 employees (LinkedIn) - 7 M+ monthly downloads, 1 B+ sandboxes started - 94 % of Fortune 100 companies use E2B (self-reported) - Open-source GitHub repo has 12,720 stars, 527 releases, active contributor community - Traffic: 196,886 monthly visits (+42 % YoY) ## Competitive Advantages - **Open‑source & LLM‑agnostic**: Works with any model (OpenAI, Llama, Anthropic, Mistral, custom). - **Speed & Isolation**: Sandboxes start in <200 ms; microVM isolation (Firecracker) for untrusted code. - **Enterprise‑grade**: BYOC, on‑prem, VPC deployment, SAML/Okta SSO, GDPR/enterprise security features. - **Deep Integrations**: Supports Python, JavaScript, TypeScript, Go, Ruby, C++, and most Linux packages. - **Large Community**: 12.7 K GitHub stars, active Discord, cookbook with example workflows. ## Strategic Focus - **Scale Enterprise Adoption**: Already serving Fortune 100 clients, aims to become the default cloud for AI agents. - **Product Expansion**: Adding reinforcement learning, deep research agents, and longer sessions (up to 24 h). - **Talent Growth**: Actively hiring 16+ roles (Product Engineer, SRE, Distributed Systems, DevRel, etc.) to accelerate product development. ## Why Work Here - **High‑impact mission**: Build the foundational infrastructure for the next wave of AI – used by the largest tech companies and open‑source community. - **Strong engineering culture**: Cross‑disciplinary team (distributed systems, security, AI) with an open‑source ethos; tech stack includes Python, TypeScript, Go, Kubernetes, Docker, Terraform, Firecracker, and major cloud providers. - **Growth trajectory**: 169 % headcount growth, $35 M in funding, and a clear enterprise traction story. - **Location & flexibility**: Offices in San Francisco (HQ) and Prague, Czechia. Remote/hybrid not explicitly stated but team operates across 5 countries. - **Visible open‑source work**: GitHub repository with 12.7 K stars allows engineers to contribute publicly and build reputation. ## Sources 1. [e2b.dev](https://e2b.dev/) 2. [e2b.dev/careers](https://www.e2b.dev/careers) 3. [linkedin.com/company/e2b-dev](https://www.linkedin.com/company/e2b-dev) 4. [github.com/e2b-dev/e2b](https://github.com/e2b-dev/e2b) 5. [tracxn.com](https://tracxn.com/d/companies/e2b/__U7C82j6Wk3VH-rgW0n4LFnUqqq-LuBw6rnIcnLGz2yU) ## Other roles at E2B - [Technical Copywriter](https://feeny.ai/job/technical-copywriter-e2b-san-francisco-ssw0phegqcyz) — San Francisco, CA - [Community & Events Marketing Manager](https://feeny.ai/job/community-events-marketing-manager-e2b-san-francisco-mn9gr036axce) — San Francisco, CA - [Content Marketing Lead](https://feeny.ai/job/content-marketing-lead-e2b-san-francisco-6hefb4wh2csd) — San Francisco, CA - [Engineering Team Lead, Platform](https://feeny.ai/job/engineering-team-lead-platform-e2b-prague-306jybs5caqr) — Prague, Czech Republic - [Product Engineer - Backend Developer](https://feeny.ai/job/product-engineer-backend-developer-e2b-san-francisco-zks5f2vz66tr) — San Francisco, CA - [Platform Engineer](https://feeny.ai/job/platform-engineer-e2b-prague-394epn2ng4xj) — Prague, Czech Republic - [Technical Recruiter](https://feeny.ai/job/technical-recruiter-e2b-san-francisco-jbj831szarvq) — San Francisco, CA - [Business Operations](https://feeny.ai/job/business-operations-e2b-san-francisco-x91a6jab142t) — San Francisco, CA - [Platform Engineer](https://feeny.ai/job/platform-engineer-e2b-san-francisco-qvdmdpg4510q) — San Francisco, CA