Anton Spilnyy contributed to JetBrains’ ij-perf-report-aggregator and intellij-community repositories by delivering targeted improvements in metric evaluation and benchmarking. He updated the AI test generation chart metrics to use SessionsWithoutSyntaxErrorsRatio, providing more accurate insights for quality assurance workflows. In intellij-community, Anton enhanced the evaluation pipeline by implementing runtime metrics propagation and adding support for double indicators, which improved the fidelity of performance data. He also configured a repeatable Kotlin benchmarking dataset, supporting robust performance analysis. His work demonstrated depth in Kotlin, front-end development with Vue, and benchmarking, focusing on precise, maintainable solutions without introducing or addressing major bugs.