Cognition
Software Engineer
$260K–$300K
San Francisco +1 · On-site · Full-time · Posted Aug 6, 2026
- Location
- San Francisco
New York City - Education
- BS, MS, or equivalent in Computer Science, Mathematics, Engineering, or a related technical discipline from a highly selective program.
About the job
Build and ship AI agent infrastructure and AI-native developer tools for Devin and Windsurf, focusing on reliable reasoning, coding workflows, and production performance.
What you'll do
- Design agent systems for long-horizon execution, including tool use, context management, planning, subagent orchestration, and sandboxed code execution.
- Improve Windsurf’s editor intelligence, agent-in-the-loop workflows, real-time code understanding, and developer experience.
- Translate model capabilities into product features and build reliable, low-latency systems for agentic tasks at scale.
What they ask for
- Strong Python proficiency and experience owning large Python codebases in production.
- Experience building reliable, performant distributed systems.
- Demonstrated ability to ship quickly while maintaining code quality and build products used by people.
- BS, MS, or equivalent in Computer Science, Mathematics, Engineering, or a related technical discipline from a highly selective program.
Nice to have
- Prior experience at a frontier AI lab, applied AI company, or developer tools company.
- Curiosity about LLMs, agents, and reliability of AI-powered systems.
Pay
$260,000 - $300,000 USD base salary
Tools
Python
AI focus
Build AI agents that reason across code and long-horizon tasks, coordinate subagents, use tools reliably, and support AI-native developer workflows; collaborate with researchers to bring model capabilities into products.
Model-written summary · the original posting is authoritative