Full Stack Engineer

Full Stack Engineer

⚠️ Please read first

• This is a full-time, in-person role based in San Francisco (Presidio) - we work from the office 5 days a week.
• You must be based in the Bay Area or willing to relocate before starting.
• We require US work authorisation

Who You Are

Minimum

• You have 4+ years of engineering experience, with a strong track record of shipping real products.
• You’re fluent in TypeScript and comfortable working across the stack — frontend, backend, and database.
• You’ve built and owned complex full-stack systems end to end, not just small pieces.
• You’re comfortable with ambiguity, unblock yourself, and make progress without waiting on perfect specs.
• You've worked in either a startup or a high calibre high paced team before

Bonus (but not required)

• You’ve worked with the stack: React, Next.js, Node.js, PostgreSQL, Cloudflare Durable Objects.
• You’ve built or integrated with LLM-based tools and have hands-on experience with AI workflows.
• You’ve been a founder or early-stage engineer before, and care deeply about product.

About the Opportunity

This is an exciting opportunity to join a fast-growing startup building an IDE for AI agent development using natural language. The platform looks and feels like Notion, but lets users design, test, and deploy AI systems in real time—without writing code.

The mission: Bring structure and joy to human–AI collaboration.

The company is backed by top-tier investors, including Spark Capital, Felicis, and Y Combinator ($30M seed round - the largest in YC history).

You’ll work in a high-trust, high-impact environment where you’ll do the best work of your life alongside a talented, collaborative team.

What You’ll Do

You’ll write and ship full-stack features end to end — from frontend UI, to backend logic, to the database and infra.

As part of a small, early-stage team, you won’t just be building features; you’ll help shape the trajectory of the company and the future of AI development.

Here are a few examples of the kinds of things you might work on:

• Build a real-time, multiplayer IDE for AI development — think Google Docs meets VSCode, powered by Y.js and TipTap.
• Extend a custom runtime that turns natural language into live, traceable agent workflows with pause/resume and retries.
• Design the “GitHub for AI” — an interface for exploring, remixing, and sharing agents and flows with versioning and collaborative editing.
• Talk to users, debug live issues, and ship fixes fast — often the same day.
• Make product calls in the moment when things are ambiguous, and help shape the platform being built.
• $​{your ideas}

Stack

TypeScript, React, Next.js, Node.js, PostgreSQL, Cloudflare Workers, Durable Objects, Y.js, and TipTap

Benefits

• Competitive compensation and equity
• Comprehensive healthcare coverage
• Professional growth and learning opportunities
• Work with cutting-edge AI technology
• Collaborative, mission-driven team environment

Company Culture

The company is mission-driven, values creativity and collaboration, and fosters a supportive, high-trust environment. You’ll be empowered to take ownership, move fast, and make a real impact on the future of AI development

Logistics

• Full-time, in-person role (San Francisco, Presidio)
• Must be based in the Bay Area or willing to relocate
• US work authorization required