Senior Agent Platform Engineer | AI-Powered Collaboration

Fdetimes; Foster City (CA); Hybrid; USD 180,000 - 260,000; Full time

Benefits offered by this job

Health insurance

401(k) match

Paid time off

Flexible Time Off

Job summary

Replit is hiring for a senior backend/infra engineer to build high-throughput services that power the Agent experience and scale the platform. You will bridge gaps between AI and UX teams, shaping end-to-end tooling and infrastructure for rapid product iteration.

The role blends systems engineering with developer experience, requiring autonomy, collaboration, and a passion for durable, scalable software across frontend/backend and Linux systems. Foster City hybrid work engages in-office M/W/F.

Qualifications

• 8+ years professional experience building backend services, systems and platforms.
• Self-directed and autonomous with strong ownership.
• Collaborative, team-oriented with a strong sense of shared ownership.

Responsibilities

• Build high-throughput backend applications and services, like streaming chat between user and agent.
• 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.
• Develop infrastructure (frontend & backend) that empowers product engineers to rapidly ship delightful user experiences.
• Design and build durable, well-crafted interfaces between the Agent and internal systems, as well as external agentic systems (MCP)

Skills

Backend services

Self-directed

Collaborative

Ownership

Tools

OT/CRDTs

Git

Event Sourcing

Job description

Replit is hiring for a senior backend/infra engineer to build high-throughput services that power the Agent experience and scale the platform. You will bridge gaps between AI and UX teams, shaping end-to-end tooling and infrastructure for rapid product iteration.

The role blends systems engineering with developer experience, requiring autonomy, collaboration, and a passion for durable, scalable software across frontend/backend and Linux systems. Foster City hybrid work engages in-office M/W/F.