First Engineer — Build AI Platform & Open‑Source Tools

TraceRoot.AI (YC S25); San Francisco (CA); On-site; USD 120,000 - 220,000; Full time

Job summary

A cutting-edge technology startup in San Francisco is seeking a first engineer to collaborate with founders in building innovative AI products. This role requires strong full-stack development skills, particularly with React, TypeScript, and Node.js. Candidates should have a builder mindset and be able to work quickly within a startup environment. You will engage with users, ship new features rapidly, and maintain open-source projects as part of a dynamic team culture.

Qualifications

• You have shipped production features from start to finish.
• You thrive under pressure and solve hard problems efficiently.

Responsibilities

• Talk to users to improve AI and UX.
• Ship full-stack features for user applications.
• Maintain open-source projects to engage developers.
• Enhance AI agents' performance and reliability.
• Build robust infrastructure for telemetry events.

Skills

Strong full-stack experience with React, TypeScript, and Node.js

Strong sense of ownership

Strong communicator

Scrappy and execution-driven

Relentless builder mindset

Tools

Multi-agent systems

Observability tooling

Startup experience

Job description

A cutting-edge technology startup in San Francisco is seeking a first engineer to collaborate with founders in building innovative AI products. This role requires strong full-stack development skills, particularly with React, TypeScript, and Node.js. Candidates should have a builder mindset and be able to work quickly within a startup environment. You will engage with users, ship new features rapidly, and maintain open-source projects as part of a dynamic team culture.