# Principal Software Engineer at Endgame

- Company: Endgame
- What the company does: Endgame compiles every call, email, meeting, and playbook your team produces into one living context graph that people and agents can act on. Backed by Menlo.
- Company website: https://www.endgame.io/
- Type: Startups
- Level: Principal and up
- Location: Remote
- Work setup: Remote
- Posted: 2026-06-29
- Apply by: 2026-10-08
- Apply: https://jobs.ashbyhq.com/endgame/a4395505-64e4-4b92-ba60-66dd44115499
- Page: https://www.1752.vc/careers/jobs/endgame-principal-software-engineer/

## About the role

Build and evolve the MCP server and agent tool surfaces that AI clients use to query Endgame's context graph — designing tool schemas, managing context windows, and making sure every tool call returns the right data fast. Ship the frontend features, tRPC routes, and React components that customers interact with daily — from admin dashboards to the core product UI.

## What they're looking for

- Deep understanding of the TypeScript and JavaScript ecosystem. You've built and maintained serious systems in it, not just touched it
- Familiarity with Python
- Experience designing and implementing LLM and agent tool surfaces, including the tools themselves and the context management around them
- Experience with frontier AI models in production in cloud environments
- Experience developing APIs with a real focus on observability and authentication
- Strong product instincts. You can take an ambiguous product requirement and translate it into deliverable engineering scope

Tags: Engineering