Product Engineer - Developer Platform

Department: Engineering

Location: San Francisco Office

Employment Type: FullTime

TypeSafe is a frontier model lab. We build reliable and general AI systems to power economically valuable automation. Our mission is to usher in a new era of Transformative Artificial Intelligence (TAI): technology with the power to drive a societal shift on the scale of the agricultural and industrial revolutions.

While others chase benchmarks and academic puzzles, we’ve been quietly rethinking the LLM stack from first principles — building a new kind of general frontier model designed for real-world reliability, decision-making, and autonomy in production.

About the role

As a full-stack product engineer on our platform team, you will build and own tools on our developer console — the site where developers create accounts, get API keys, and explore our models.

You'll make sure that developers can get started, understand what our models can do, and manage their usage. Through awesome interfaces, you'll also help developers discover what's possible with our models. You will be responsible for the front-line experience of developers interacting with our platform.

We use TypeScript, Next.js, and Tailwind CSS for our front-end. Some of our backend services are written in Python.

We empower developers to use any tooling they find helpful for getting their job done, including Claude Code and Cursor.

On a day to day level, you might

• Craft beautiful and intuitive UIs - for the boring stuff and the cool stuff

• Develop deep understanding of our models' capabilities — including new ones as they ship — and figure out how to convey that to developers through the playground and other interactive examples

• Build and maintain core platform features that developers rely on every day — account management, API keys, teams, usage dashboards, and billing

• Make our platform easy to use for both developers and agents

• Investigate and resolve issues developers encounter on the platform

• Build internal tools that help us better understand and support our developers

• Close the loop between developer feedback and the product — work with solutions engineering, product, and marketing to identify friction and ship improvements to the developer experience

We are looking for people who

• Put developers first — you use APIs yourself, you know what a bad developer experience feels like, and you want developers to succeed

• Love beautiful interfaces and product — you are thrilled by a good UI that simplifies complex concepts and feels easy to use

• Show complete ownership — can think about goals on a strategic level and define what needs to happen toward that goal, rather than at the level of tasks or tickets

• Have shipped software apps end-to-end, including integration with AI/LLMs, and understand their capabilities and limitations

• Have a teaching mindset — you're excited about helping people understand things, not just building features

• Are comfortable working across very different problem types, from billing infrastructure to interactive playgrounds to debugging developer issues

• Are familiar with popular frameworks and tools that can accelerate work (incl coding agents), and stay current on SOTA best practices

• Have 5+ years of professional software engineering, or equivalent professional expertise

Life At TypeSafe

We’re a small, flat, close-knit team dedicated to real-world impact preparing the world for Transformative AI. Our team works fully in-person in our San Francisco office near Embarcadero station. We love what we do and care about our work a lot.

We strive for excellence and craftsmanship and won't stop until we get there. When the team wins, we all win, and we enjoy collaborating and inspiring each other to grow as a team and as individuals.

We also value emotional honesty, kindness, and bringing your whole self to work. We build machines; we don't try to be machines.

We want you to be able to do the most impactful work of your career at TypeSafe and help define our future as a company.

We provide

- Competitive salary and equity

- 100% covered health insurance

- Daily lunch and dinner

- Visa sponsorships

- 401K plans