Victor K. worked on the starkware-libs/sequencer repository, focusing on migrating the core backend to Hyper library version 1.x using Rust. He addressed new API requirements by updating dependencies and packaging specifications, ensuring the build process remained reproducible and compatible with future upgrades. His technical approach involved aligning the build configuration with the updated API surface, which reduced future maintenance costs and improved readiness for downstream integration. Although no bugs were reported or fixed during this period, Victor’s work demonstrated depth in backend development and dependency management, laying a stable foundation for ongoing development and smoother integration of future features.