Senior Software Engineer, Agent Platform

Replit Replit · Enterprise · Foster City, CA · Hybrid · Engineering

Senior Software Engineer role focused on building the Agent Platform at Replit, a consumer-facing agentic software creation platform. The role involves developing backend services, collaborative systems for human-AI interaction, and infrastructure to support rapid iteration on the Agent experience. It bridges the gap between core AI logic and user experience.

What you'd actually do

  1. Build high-throughput backend applications and services, like streaming chat between user and agent.
  2. Design a collaborative "Multiplayer Computer" that lets humans and AI agents work together on shared shells, filesystems, and state—conflict-free and in real time.
  3. Develop infrastructure (frontend & backend) that empowers product engineers to rapidly ship delightful user experiences.
  4. Design and build durable, well-crafted interfaces between the Agent and internal systems, as well as external agentic systems (MCP)

Skills

Required

  • backend services
  • systems
  • platforms
  • collaborative editing technologies
  • event sourcing systems

Nice to have

  • full-stack
  • AI powered tooling or products
  • Operational Transforms (OT)
  • CRDTs
  • Git

What the JD emphasized

  • 5+ years professional experience in building backend services, systems and platforms

Other signals

  • agentic software creation platform
  • AI coding agent
  • build powerful tools that help product engineers iterate rapidly on the Agent experience and directly enhance the core Agent itself
  • bridge the gap between the AI team (working on the core Agent logic) and the UX team (crafting delightful Agent experiences)