San Cao
Backend Engineer • Infrastructure
2019 - 2021 Problem Setter
Competitive ProgrammingAlgorithmsVOIProblem Setting

FreeContest

Problem Setter for Vietnam's premier competitive programming platform, preparing content for National Olympiad (VOI) candidates.

Project Link

Collaborated with technical teams to engineer weekly competitive programming contests on the self-hosted FreeContest platform. Focused on providing high-fidelity training for high school students preparing for the Vietnam National Olympiad in Informatics (VOI).

  • Problem Engineering: Authored rigorous problem statements, defined technical constraints, and designed edge-case verification samples.
  • Testsuite Development: Generated robust, high-coverage test datasets to ensure submission validity and judging accuracy.
  • Technical Editorials: Drafted comprehensive solution documents detailing optimal algorithmic approaches, complexity analysis, and implementation strategies.