About Foundry We're building the foundational infrastructure to automate digital work. Today's browser-based workflows represent a potential trillion dollar opportunity—currently trapped behind inefficient manual tasks and repetitive actions. Current AI agents fail when facing complex real-world scenarios; they're brittle experiments, not scalable solutions. Foundry provides the critical, high-fidelity simulation environment necessary for training, testing, and deploying robust AI agents. Think Waymo’s Sim for autonomous driving, but for digital tasks. Our goal is to unlock unprecedented efficiency by building the platform that powers the next wave of automation at global scale. Your Role: As a founding engineer, you'll build core systems from first principles, influencing every aspect of the platform's design and performance: Simulation Core Engine: Architect and implement an ultra-realistic, scalable browser simulation environment capable of handling complex enterprise scenarios. Architect and implement an ultra-realistic, scalable browser simulation environment capable of handling complex enterprise scenarios. Evaluation and Benchmarking Systems: Design rigorous frameworks and evaluation tools that set industry standards for AI reliability and performance. Design rigorous frameworks and evaluation tools that set industry standards for AI reliability and performance. Full-stack Platform Development: Deliver high-quality internal and customer-facing products, leveraging deep expertise in backend (Python, Rust, Go) and frontend (React/Next.js, TypeScript) technologies. Deliver high-quality internal and customer-facing products, leveraging deep expertise in backend (Python, Rust, Go) and frontend (React/Next.js, TypeScript) technologies. End-to-End Production Ownership: Own the full lifecycle—from conception through deployment to scale—of systems used by leading global tech companies. Own the full lifecycle—from conception through deployment to scale—of systems used by leading global tech companies. Establish Engineering Excellence: Define and implement best practices for code quality, CI/CD, automated testing, monitoring, and observability from the start. Who We're Looking For: Exceptional Technical Talent: 6-10+ years experience building highly complex, full-stack platforms at top-tier technology firms or startups, demonstrating clear ownership from initial design to scalable production. 6-10+ years experience building highly complex, full-stack platforms at top-tier technology firms or startups, demonstrating clear ownership from initial design to scalable production. Deep System Knowledge: Advanced expertise in distributed systems, browser internals, concurrency, and networking with a track record of engineering leadership. Advanced expertise in distributed systems, browser internals, concurrency, and networking with a track record of engineering leadership. Master Builder Mindset: Proven ability to architect and rapidly deliver elegant, scalable, and maintainable software solutions that impact industry standards. Proven ability to architect and rapidly deliver elegant, scalable, and maintainable software solutions that impact industry standards. Elite Coding Skills: Fluent in TypeScript (React/Next.js) and Python (FastAPI). Strong familiarity with modern infrastructure technologies including Kubernetes, Docker, and cloud platforms (AWS/GCP). Fluent in TypeScript (React/Next.js) and Python (FastAPI). Strong familiarity with modern infrastructure technologies including Kubernetes, Docker, and cloud platforms (AWS/GCP). Standout Track Record: Demonstrated excellence through significant achievements such as recognized open-source contributions, leadership of widely used technical products, or competitive programming accolades (e.g., Codeforces rating ≥1600). Demonstrated excellence through significant achievements such as recognized open-source contributions, leadership of widely used technical products, or competitive programming accolades (e.g., Codeforces rating ≥1600). Comfort in Uncharted Territory: Thrive in highly ambiguous environments, eager to independently shape foundational products and technical strategies with minimal guidance. Tech Stack: Backend: FastAPI (Python), Go, Rust FastAPI (Python), Go, Rust Frontend: React/Next.js (TypeScript) React/Next.js (TypeScript) Core Tech: WebSockets, Playwright/Puppeteer, PostgreSQL, Redis, RabbitMQ WebSockets, Playwright/Puppeteer, PostgreSQL, Redis, RabbitMQ Infrastructure: Kubernetes, Docker, robust CI/CD pipelines (GCP/AWS) Why Join Foundry: