Backend Developer

About the job

Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark, General Catalyst, Peter Thiel, Adam D'Angelo, Larry Summers, and Jack Dorsey.

Position: Backend Engineer (Coding Agent Experience) Type:Contract Compensation:$85/hour Location:Remote

Role Responsibilities

• Use frontier AI coding agents to complete and evaluate complex engineering tasks. • Review model-generated code for correctness, quality, maintainability, and performance. • Identify bugs, edge cases, and failure modes in model outputs. • Compare outputs from multiple frontier models and assess their strengths and weaknesses. • Apply professional engineering judgment to realistic backend engineering scenarios. • Work independently and asynchronously to meet deadlines while improving AI model performance.

Qualifications

Must-Have

• 2+ years of professional backend engineering experience. • Experience building APIs, distributed systems, microservices, backend platforms, or databases. • Regular use of AI coding agents such as Cursor, Claude Code, Codex, Windsurf, Gemini CLI, or similar tools. • Ability to evaluate model-generated code and identify bugs, edge cases, and architectural tradeoffs.

Preferred

• Experience working on large-scale production systems.

Compensation & Legal

• $400 per accepted task. • Typical tasks take approximately 1–3 hours after ramp-up. • No fixed task limits. • Compensation is…