Coding Puzzle Verification Task Author

IXO is engaging specialists to evaluate coding puzzles that reveal how a solver reasons through a difficult problem. Your contribution is technical work: make the reasoning inspectable, identify substantive errors and provide evidence that supports a reliable assessment.

Work you will do

• Develop or solve algorithmic challenges with a clear objective and well-defined constraints.
• Check the correctness and efficiency of candidate solutions, including edge cases and misleading approaches.
• Write understandable reference reasoning and feedback that helps distinguish robust problem solving from a lucky answer.

Required background and routes

• Strong algorithmic reasoning and a general-purpose language such as C++, Python, Java, Go, Rust, C#, TypeScript or JavaScript.
• Evaluate constraints, complexity and edge cases; debug unfamiliar code, work in terminal environments and deliver reproducible, testable solutions with clear technical explanations.

Preferred background

• A verifiable Codeforces record showing meaningful competition experience.

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. Availability planning can include 15 hours per week depending on the track. 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.