Competitive Programming Expert - Freelance AI Trainer

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# Competitive Programming Expert - Freelance AI Trainer > Mindrift · Sweden (Remote) · Part-time · Posted 2026-08-26 **Workplace:** remote **Department:** Competitive Programming ## Description _Please submit your CV in English and indicate your level of English proficiency._ Mindrift connects specialists with project-based AI opportunities for leading tech companies, focused on testing, evaluating, and improving AI systems. Participation is project-based, not permanent employment. **What this opportunity involves** We're building competitive-programming problems and their automatic graders (test cases + checkers) used to train advanced AI coding models. You'll create problems, write both correct and deliberately-wrong solutions, and design the tough test cases that catch subtly-broken code. Your work is what makes the training signal trustworthy. To apply, share: your competitive-programming handle(s) + current/peak rating, any problem-setting experience, and IOI/ICPC/olympiad history. **What you'll do** - Write original algorithmic problems — clear statement, sound constraints, an intended solution; - Write correct solutions in C++ and Python; - Write realistic wrong solutions (common mistakes) to test against; - Build and harden test cases: generators, edge cases, stress and "hacking" tests; - Write checkers/interactors (testlib) for problems with more than one valid answer; - Confirm the quality bar: correct solutions pass, wrong ones fail, within time limits. **What we look for** - Strong competitive programming background, shown by a public profile — a Codeforces rating (see levels below), OR an IOI / ICPC / national-olympiad record; - Fluent contest C++ (STL, complexity); comfortable writing Python; - Can explain why a solution is wrong and build an input that breaks it; - Strong written English (C1+). Levels (by Codeforces rating, or equivalent olympiad achievement): - _Associate_ — 1700–2100 (Expert / Candidate Master): easier problems; - _Expert_ — 2200–2600 (Master / Grandmaster): harder problems - _Senior / Reviewer_ — 2600+ (Int'l Grandmaster) or IOI/ICPC medalist: hardest problems + quality review. **Nice to have** - IOI / ICPC alumni and top competitive programmers especially encouraged to apply; - Experience setting or testing problems for real contests (Codeforces rounds, ICPC, national olympiods, online judges); - Testlib experience (checkers, validators, generators); - Experience creating data for LLM code benchmarks or similar RL / evaluation datasets. **How it works** Apply → Pass qualification(s) → Join a project → Complete tasks → Get paid **Project time expectations** For this project, tasks are estimated to require around 10-20 hours per week during active phases, based on project requirements. This is an estimate, not a guaranteed workload, and applies only while the project is active. Tasks must be submitted by the deadline and meet the listed acceptance criteria to be accepted. **Compensation** Paid per accepted task. Your rate depends on the qualification tier you reach and how efficiently you complete tasks — up to the equivalent of **$90/hr**. Because payment is per task, a faster pace raises your effective hourly rate. ## Apply [Apply at Mindrift](https://apply.workable.com/toloka-ai/j/80DE7D542C/apply) --- Powered by [Workable](https://www.workable.com)