Competitive Programming Expert - Freelance AI Trainer

• Strong competitive programming background shown by a public profile such as a Codeforces rating or IOI/ICPC/national-olympiad record.
• Fluent contest C++ (STL, complexity);
• Comfortable writing Python.
• Ability to explain why a solution is wrong and build input that breaks it.
• Strong written English with C1+ proficiency.

Nice to have:

• IOI/ICPC alumni and top competitive programmers especially encouraged.
• Experience setting or testing problems for contests like Codeforces rounds, ICPC, national olympiads, online judges.
• Testlib experience (checkers, validators, generators).
• Experience creating data for LLM code benchmarks or RL/evaluation datasets.

• Write original algorithmic problems with clear statements, sound constraints, and intended solutions.
• Write correct solutions in C++ and Python.
• Write realistic wrong solutions to test against.
• Build and harden test cases including generators, edge cases, stress, and hacking tests.
• Write checkers/interactors (testlib) for problems with multiple valid answers.
• Confirm quality bar: correct solutions pass, wrong ones fail within time limits.

Fluent written English C1+ proficiency is required. Participation is project-based, not permanent employment. Tasks must be submitted by deadlines and meet acceptance criteria. Candidates must submit a CV in English indicating their level of English proficiency.