Deepak Kushwaha enhanced gateway routing flexibility for RUPAY card flows in the juspay/decision-engine repository by implementing a targeted filtering update. He removed HyperPg from the CardMandateBinFilterExcludedGateways, thereby broadening the available gateway options for RUPAY mandate transactions and aiming to reduce processing bottlenecks. Working primarily with Rust and focusing on backend development, Deepak ensured the change was fully tracked for traceability and auditability through detailed commit history. Although the scope was limited to a single feature over one month, the work addressed a specific business need by streamlining transaction processing and supporting a smoother rollout in future releases.