Andreas Hoehmann developed epoch-second support for the project.build.outputTimestamp property in the spring-projects/spring-boot repository, enabling reproducible builds across diverse environments. He introduced the MavenBuildOutputTimestamp class and an integration test to ensure accurate generation of build information using epoch seconds, expanding compatibility beyond the existing ISO-8601 format. Working primarily with Java, Maven, and build tools, Andreas addressed the challenge of reducing variability in CI/CD pipelines by improving determinism in build artifacts. His work focused on enhancing cross-environment reliability for build outputs, demonstrating a deep understanding of build reproducibility and the technical nuances of timestamp parsing and validation.