During October 2025, Zumzoom contributed to the OpenZeppelin/openzeppelin-contracts repository by optimizing the Math.average function in the Math library. Collaborating with Ernesto García, Zumzoom applied unchecked arithmetic in Solidity to remove overflow checks, thereby reducing gas consumption and improving throughput for high-volume smart contract calculations. This approach maintained accuracy for safe inputs while enhancing performance, addressing the needs of blockchain applications that require efficient computation. The work demonstrated a strong grasp of Solidity and blockchain development, focusing on scalability and performance engineering within a widely used smart contract library. No bugs were fixed during this period, reflecting a targeted feature contribution.