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Senior Software Engineering Experts

  • Pay: $120 to $180 / hour
  • Contract: Contract
  • Who can apply: United States, United Kingdom, Canada +2
  • Posted Oct 27, 2026

In short

You would help train and test AI systems on real software engineering work, such as feature changes, debugging and code review. The pay is 120 to 180 USD per hour on a freelance contract, and the work is remote. It may suit you if you have senior engineering experience at well-known tech, quant or finance firms.

What you will do

  • Design realistic software engineering tasks based on real work, such as changing large codebases or designing systems.
  • Write clear task proposals that explain why each task is realistic, how it is checked and why it is hard for current AI models.
  • Write reference solutions, tests and precise criteria that show what good work looks like.
  • Judge code written by AI coding agents and by engineers, noting where the AI succeeds or fails.
  • Improve your submitted work based on structured feedback from senior reviewers.

What you need to apply

  • At least 4 years of professional software engineering experience.
  • Strong command of at least one major language, such as Python, Java, C++, Go, TypeScript or Rust.
  • Experience with system design, testing, debugging and code review.
  • Excellent written English and a Bachelor's degree from an English-speaking country.

Who can apply

You can apply if you live in the United States, United Kingdom, Canada, Australia or New Zealand. The role is a freelance contract.

My tip

We suggest you explain in your application one or two technical decisions you made, including the trade-offs, because clear written reasoning matters a lot for this role.

Originally published on Mercor

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