Algorithmic Challenge and Checker Author
Job Description
IXO is engaging specialists to evaluate competitive-programming problems with rigorous solution and checker design. Your contribution is technical work: make the reasoning inspectable, identify substantive errors and provide evidence that supports a reliable assessment.
Work you will do
• Author challenging algorithmic tasks that require the intended reasoning rather than an accidental shortcut.
• Develop reference solutions and C+• checking or validation logic appropriate to the problem.
• Test edge cases, difficulty and correctness, and document why the verifier accepts valid solutions and rejects invalid ones.
Required background and routes
• Strong competitive-programming performance, practical C+• implementation and the ability to design difficult algorithmic problems with reliable solutions, tests and checkers.
Preferred background
• Prior service as a setter, checker or tester on established competitive-programming platforms.
Deliverables
Submit the completed technical artifact or assessment with its supporting evidence, explicit assumptions, reproducible checks where applicable, and concise reasons for each material judgment. Address review findings within the agreed scope.
Location and schedule
Remote assignments are scheduled by agreement, with no guaranteed weekly volume. IXO confirms the applicable timing before work.
Pay and working terms
Per completed task; fee agreed before work USD. Payment is for a completed task that meets the agreed acceptance criteria. The fee, task specification and revision requirements are agreed before work; an advertised time estimate does not determine payment. Applying does not guarantee an assignment. Use public, licensed or otherwise authorized material only; do not submit confidential employer information, personal data or restricted research.