Vasek Mlejnsky
Co-Founder & CEO at E2B
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolVasek Mlejnsky is a founder and engineering leader with a decade of experience building developer-focused startups and shipping full-stack products from San Francisco. As Co-Founder and CEO of E2B he scaled the company to Series A, helping secure $37M+ in funding, reach 8-figure revenue, and grow a global team while serving thousands of customers and driving 4.5M+ monthly SDK downloads. He combines hands-on engineering—demonstrated by contributions to an open-source Next.js AI app that added streaming, tool execution, and UI integrations—with product sensibility from earlier ventures like Devbook. A regular speaker on sandboxed code interpreting and an alumnus of Pioneer, he blends technical depth in AI/devtools with practical experience commercializing developer platforms. Unusually, he splits his time between leading strategy and still shipping code, keeping him close to the developer experience he sells.
10 years of coding experience
2 years of employment as a software developer
Computer Science, Computer Science at Charles University
Czech, English
Github Skills (15)
typescript10
javascript10
nextjs10
typescripts10
react10
typescript-types10
apidoc9
anthropic9
api9
ai8
streamlit6
python6
tailwindcss6
html5
css5
Programming languages (12)
Github contributions (5)
e2b-dev/fragments
Jul 2024 - Mar 2025
Open-source Next.js template for building apps that are fully generated by AI. By E2B.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:13 reviews, 11 PRs, 30 pushes in 8 months
Contributions summary:Vasek primarily contributed to the development of the front-end and API functionality for an AI-powered application built on Next.js. They made significant changes to the `/api/chat/route.ts` file, integrating features like tool usage (Python code execution) and StreamData for streaming responses. The user also worked on the UI components, specifically `components/artifact-view.tsx` and `components/chat.tsx`, to display results and user interactions. Further contributions included adding Next.js developer capabilities with different templates and adding pre-compilation steps.
aiai-code-generationanthropicclaudeclaude-ai
e2b-dev/desktop
Oct 2024 - Mar 2025
E2B Desktop Sandbox for LLMs. E2B Sandbox with desktop graphical environment that you can connect to any LLM for secure computer use.
Contributions:35 reviews, 17 PRs, 43 pushes in 5 months
aidesktope2be2b-devgpt
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