Senior Full Stack Engineer (Observability & Evals Platform)

Location: San Francisco, CA; in person 5 days per week

Annual salary: $175,000–$240,000 USD

Company

Builds open-source frameworks and commercial products for developing, evaluating, deploying, and operating AI agents at scale, including an observability and evaluation platform for production use.

What you will do

• Lead the technical architecture and implementation of key features for the commercial observability and evaluation platform.
• Work across the Go, Python, and TypeScript stack, including backend services and frontend experiences.
• Collaborate with product and design teams to iterate on new features.
• Mentor junior engineers and drive projects while maintaining high engineering standards.
• Write clean, maintainable, and well-tested code.
• Engage directly with enterprise customers, developer users, and internal stakeholders.

Requirements

• 5+ years of software engineering experience on complex platform products.
• Fullstack experience with Go or Python on the backend and React with TypeScript on the frontend.
• Strong understanding of database systems, particularly PostgreSQL and Redis.
• Experience designing and scaling APIs, preferably in high-performance, data-intensive applications.
• Strong communication, ownership, and ability to collaborate with internal stakeholders and customers.
• Ability to ship quickly, iterate on user feedback, and maintain high engineering quality.

Nice to have

• Experience with AI or LLM-powered applications.
• Experience with developer tools or observability platforms.

Culture & Benefits

• Full-time, on-site work in San Francisco.
• Opportunity to shape the technical direction of a rapidly growing platform.
• Medical, dental, and vision coverage.
• Flexible vacation, 401(k), and meals on in-office days in the US.
• Base salary, variable compensation where relevant, equity, and additional benefits.