Euclid is a high-growth AI startup replacing unreliable LLM "guessing" with Precision Agents™—deterministic AI built for mission-critical logistics. Their platform delivers 100% benchmarked accuracy and 1–2ms resolution times. Enterprise giants like Ruan and Dot already trust them, and they are scaling fast.

As a Senior Fullstack Engineer, you will work directly with the CTO in their San Francisco office to architect and deploy AI-driven backend systems. This is a high-velocity, backend-heavy full-stack role focused on shipping production-ready AI automation.

• Experience: 7+ years of professional web dev; 3+ years with production TypeScript.
• AI Expertise: Hands-on experience building with or on top of LLM APIs (Claude, OpenAI).
• Backend & DB: Deep experience with PostgreSQL, Drizzle ORM, and Hono (or similar API frameworks).
• Full-Stack Capability: Ability to build complete web apps; experience or willingness to touch our AI-assisted Svelte frontend.
• Presence: Ability to work from our SF office 4 days a week.

• Design and build robust, scalable APIs capable of 1–2ms resolution times.
• Integrate frontier LLM capabilities into production systems via API while maintaining 100% deterministic accuracy.
• Architect database schemas and optimize complex data workflows.
• Collaborate face-to-face with the founding team to rapidly prototype and ship features.

• Location: San Francisco, CA (Hybrid - 4 days/week in-office)
• $200,000 base salary.
• High-upside founder equity ($50K–$400K value).
• High-growth, in-person engineering culture in the heart of San Francisco.
• Flexible PTO and local public holidays.