
Jacek contributed to the stellar/stellar-core repository by enhancing the Docker-based build and test infrastructure over a two-month period. He implemented Ubuntu 24.04 support in the build environment, introducing conditional logic in shell scripts to manage LLVM repository setup and AWS CLI installation, which improved CI reliability and enabled timely package publishing for new OS releases. In parallel, Jacek upgraded the perftests Docker image to include the Redis CLI, automating dependency installation for performance testing workflows. His work leveraged skills in DevOps, Docker, and shell scripting, delivering targeted improvements that reduced manual maintenance and accelerated parallel testing in CI pipelines.

Month: 2025-10. Focused on enhancing test infrastructure for Stellar Core by delivering a feature that speeds up parallel catchup workflows and reduces setup toil in CI. Key feature delivered: Perftests Docker image enhanced to include Redis CLI, enabling Redis-based tooling for the paralle catchup V2 mission and ensuring dependencies are installed automatically when STELLAR_CORE_VERSION ends with '~perftests'. This directly accelerates testing cycles and improves reliability of performance tests.
Month: 2025-10. Focused on enhancing test infrastructure for Stellar Core by delivering a feature that speeds up parallel catchup workflows and reduces setup toil in CI. Key feature delivered: Perftests Docker image enhanced to include Redis CLI, enabling Redis-based tooling for the paralle catchup V2 mission and ensuring dependencies are installed automatically when STELLAR_CORE_VERSION ends with '~perftests'. This directly accelerates testing cycles and improves reliability of performance tests.
September 2025 focused on expanding platform compatibility and sustaining build reliability for stellar-core. Implemented Ubuntu 24.04 support in the Docker build environment by updating the build script and adding conditional logic to install LLVM repositories and the AWS CLI, aligning with the new OS release and enabling publishing of 24.04 packages. These changes improve CI reliability, reduce manual maintenance, and position the project to deliver timely packages for newer environments.
September 2025 focused on expanding platform compatibility and sustaining build reliability for stellar-core. Implemented Ubuntu 24.04 support in the Docker build environment by updating the build script and adding conditional logic to install LLVM repositories and the AWS CLI, aligning with the new OS release and enabling publishing of 24.04 packages. These changes improve CI reliability, reduce manual maintenance, and position the project to deliver timely packages for newer environments.
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