During September 2025, Hardvan developed a BitwiseGCD utility for the Hardvan/Java repository, implementing Stein’s algorithm to compute the greatest common divisor efficiently for int, long, and BigInteger types. The solution focused on algorithm implementation and bit manipulation in Java, with careful handling of edge cases such as zero values and Long.MIN_VALUE to ensure correctness across all numeric types. Hardvan also created comprehensive unit tests to validate the new functionality under various scenarios. This work improved runtime performance for GCD-heavy numeric utilities and enhanced reliability, demonstrating depth in both algorithmic design and robust, type-safe Java development practices.