[Hiring] [Worldwide] Backend Engineer, Part-Time AI Coding Evaluation - Remote (52 countries)

• $30–$100 per hour equivalent, paid per accepted task

• 100% remote

• Part-time

• Under 20 hours a week, you choose when

Work flexibly on part-time backend projects that turn real feature and bug-fix work into coding tasks and reviews for AI training and evaluation.

AI coding systems are trained and tested by software engineers. The teams building them need backend engineers who can create realistic feature and bug-fix tasks, judge whether the resulting code is correct and complete, write the checks that verify a solution, and explain where the code falls short. Your judgment helps evaluate and improve AI-generated code. This is that work, done remotely around your schedule.

What you'll do

• Write realistic backend tasks covering feature work and bug fixes for AI systems to complete

• Build deterministic checks that accept valid, complete solutions and reject incorrect or incomplete code

• Review generated code for correctness, performance, test coverage and maintainability

• Investigate debugging problems, software bugs, service bottlenecks and performance issues, then explain where the AI solution falls short

Why this is worth your time

• Earn the equivalent of $30–$100 an hour while creating and reviewing backend coding tasks

• Work hands-on with AI coding systems, writing the tasks and verifiers that show whether their backend code holds up

• Apply backend engineering judgment to evaluate how well AI systems write and fix real code

• Fully remote and flexible, no fixed shifts, no commute

Who this is for

• Backend development experience with one or more of Python, TypeScript, Go, C++, Java, Rust, Node.js or a similar language.

• Experience with scalable services and APIs, and a strong grounding in algorithms, data structures and foundational computer science

• Able to refactor code and build complex features in large-scale applications

• Professional fluency in English, with strong analytical, problem-solving and technical communication skills

• Helpful background includes service testing, automated test suites, flaky-test diagnosis, testing practices, or CI test pipelines.

• No AI experience needed.

Pay and details

• $30–$100 per hour equivalent; pay is per accepted task, as an independent contractor

• Part-time, flexible schedule; fully remote across 52 eligible countries.

• Eligible locations: Algeria, Argentina, Austria, Bahrain, Bangladesh, Belgium, Brazil, Canada, Chile, Colombia, Denmark, Egypt, France, Germany, Ghana, Greece, India, Indonesia, Italy, Japan, Jordan, Kazakhstan, Kenya, Kyrgyzstan, Kuwait, Lebanon, Malaysia, Mexico, Morocco, Netherlands, Nigeria, Oman, Pakistan, Palestine, Peru, Philippines, Portugal, Qatar, Saudi Arabia, Singapore, South Africa, Spain, Sri Lanka, Switzerland, Taiwan, Thailand, Tunisia, United Arab Emirates, United Kingdom, United States, Uzbekistan, and Vietnam.

How to apply

1. Apply on OpenTrain (about two minutes): https://app.opentrain.ai/api/out/cmurzv8ev000d04l2dhhowh7y?ch=qajobs-cmurzv8ev-20261115

2. Complete the application on the hiring platform.

3. If shortlisted, take a short AI interview.

Ready to turn your backend engineering judgment into coding tasks and reviews for AI systems?

OpenTrain AI is hiring for this role.

About OpenTrain AI

OpenTrain AI connects experienced professionals with paid, part-time AI training work: shaping and improving the AI systems that companies are building right now.