Staff Software Engineer, Agent Platform

About the role

Replit is building an AI‑powered coding agent that lets anyone create applications via natural language. As a Staff Software Engineer on the Agent Platform team you will bridge the AI core team and the UX team, delivering high‑performance tools that accelerate product engineering.

Key responsibilities

• Build high‑throughput backend services such as streaming chat between users and the Agent.
• Design a collaborative “Multiplayer Computer” enabling humans and AI agents to share shells, filesystems and state in real time.
• Develop infrastructure (frontend and backend) that empowers product engineers to ship delightful experiences quickly.
• Create durable interfaces between the Agent and internal/external systems, including MCP.

Required profile

• 8+ years of professional experience building backend services, systems and platforms.
• Self‑directed, comfortable working autonomously while collaborating across teams.
• Strong sense of ownership and a pragmatic approach to solving complex problems.

Required skills

• Linux systems engineering.
• Experience with collaborative editing technologies such as Operational Transforms (OT) or Conflict‑free Replicated Data Types (CRDTs).
• Understanding of Git internals.
• Event‑sourcing system design.
• Building high‑performance, high‑throughput backend services.

What we offer

• Competitive salary and equity.
• 401(k) with 4% match, health, dental, vision and life insurance.
• Hybrid work model with in‑office days Monday, Wednesday and Friday, plus flexible time off and wellness stipend.