iOS Engineer - AI Model Evaluator

mercor; United States; Remote; USD 455,000 - 647,000; Part time

Job summary

Mercor is seeking an iOS Engineer (Coding Agent Experience) for a remote contract role. You will use frontier AI coding agents to complete and evaluate complex engineering tasks, reviewing model-generated iOS code for correctness, quality, maintainability, and performance.

You will compare outputs from multiple frontier models, identify bugs and edge cases, and apply professional engineering judgment to realistic mobile engineering scenarios.

Qualifications

• 2+ years of professional iOS engineering experience.
• Experience building and maintaining production iOS applications using Swift and modern iOS frameworks.
• Regular use of AI coding agents such as Cursor , Claude Code , Codex , Windsurf , Gemini CLI , or similar tools.
• Ability to evaluate model-generated mobile implementations and architectural decisions.

Responsibilities

• Use frontier AI coding agents to complete and evaluate complex engineering tasks.
• Review model-generated mobile application 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 mobile engineering scenarios.

Skills

iOS engineering

Swift

AI coding agents

Code review

Tools

Cursor

Claude Code

Codex

Windsurf

Gemini CLI

Job description

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

Responsibilities

• Use frontier AI coding agents to complete and evaluate complex engineering tasks.
• Review model-generated mobile application 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 mobile engineering scenarios.

Qualifications Must-Have

• 2+ years of professional iOS engineering experience.
• Experience building and maintaining production iOS applications using Swift and modern iOS frameworks .
• Regular use of AI coding agents such as Cursor , Claude Code , Codex , Windsurf , Gemini CLI , or similar tools.
• Ability to evaluate model-generated mobile implementations and architectural decisions.

Preferred

• Experience shipping production mobile applications.

Compensation & Legal

• $400 per accepted task
• Typical tasks take approximately 2-3 hours after ramp-up.
• Compensation is tied to accepted work.