Staff Software Engineer, Agent Platform

Replit

Engineer developing backend applications and collaborative tools for AI Agent at Replit. Bridging gaps between AI logic and UX design to enhance product experiences.

Posted 4/15/2026full-timeFoster City • California • 🇺🇸 United StatesLead💰 $250,000 - $365,000 per yearWebsite

About the role

Key responsibilities & impact

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)

Requirements

What you’ll need

5+ years professional experience in building backend services, systems and platforms
Someone who values simplicity and pragmatism—you think radically but ship incrementally.
Self-directed and comfortable working autonomously.
Collaborative and team-oriented with a strong sense of shared ownership.
Experience across the full-stack.
Experience building AI powered tooling or products.
Experience with collaborative editing technologies such as Operational Transforms (OT), CRDTs, or the inner workings of Git.
Experience with event sourcing systems.

Benefits

Comp & perks

Competitive Salary & Equity
401(k) Program with a 4% match
Health, Dental, Vision and Life Insurance
Short Term and Long Term Disability
Paid Parental, Medical, Caregiver Leave
Commuter Benefits
Monthly Wellness Stipend
Autonomous Work Environment
In Office Set-Up Reimbursement
Flexible Time Off (FTO) + Holidays
Quarterly Team Gatherings
In Office Amenities

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

backend developmentfull-stack developmentAI powered toolingcollaborative editing technologiesOperational TransformsCRDTsevent sourcing systems

Soft Skills

self-directedcollaborativeteam-orientedshared ownershipsimplicitypragmatism