Worked on enhancing the sequencing pipeline in the starkware-libs/sequencer repository, focusing on improving reliability and correctness as blocks approach capacity limits. Developed a more accurate block fullness detection mechanism by comparing execution results to input transactions, ensuring that blocks reflect their true status. Refined the block builder’s logic to prevent premature termination and reduce transaction loss, addressing edge cases that could lead to mis-ordered or dropped transactions. Expanded integration test coverage to verify end-to-end sequencer behavior under full-capacity scenarios. Utilized Rust for backend development and integration testing, applying smart contract and StarkNet expertise to strengthen system robustness and monitoring.