
Arnab Kumar developed and enhanced SMS delivery and authentication systems across the nammayatri/shared-kernel and nammayatri/nammayatri repositories over five months. He integrated Karix and Pinbix SMS providers, refactored modules for maintainability, and implemented provider-agnostic configurations to improve OTP reliability and reduce vendor lock-in. Using Haskell and YAML, Arnab introduced encryption for sensitive SMS configuration data, strengthening security around OTP workflows. He also built the Rider Platform Authentication API, establishing a foundation for token-based access control, and expanded the messaging schema to support role-specific notifications. His work demonstrated depth in backend development, API integration, and secure, scalable system design.
Feb 2026: Delivered Messaging System Enhancement by adding MerchantMessage.messageType to enable clearer, role-specific messaging for riders and drivers. The change establishes a scalable foundation for targeted notifications and analytics, aligned with product goals to improve user experience and operational clarity.
Feb 2026: Delivered Messaging System Enhancement by adding MerchantMessage.messageType to enable clearer, role-specific messaging for riders and drivers. The change establishes a scalable foundation for targeted notifications and analytics, aligned with product goals to improve user experience and operational clarity.
Delivered foundational security enhancement for the rider platform by implementing the Rider Platform Authentication API. This internal API enables secure access to rider-related functionalities and establishes groundwork for token-based authentication and future access controls. The implementation is tied to commit 86fe104f9cf3e1af895a45a787951330b63a58a5 with message 'Auth api for BAP'. Overall impact: improved security posture for rider features, clearer access boundaries, and a scalable auth foundation for upcoming features across the nammayatri/nammayatri repository.
Delivered foundational security enhancement for the rider platform by implementing the Rider Platform Authentication API. This internal API enables secure access to rider-related functionalities and establishes groundwork for token-based authentication and future access controls. The implementation is tied to commit 86fe104f9cf3e1af895a45a787951330b63a58a5 with message 'Auth api for BAP'. Overall impact: improved security posture for rider features, clearer access boundaries, and a scalable auth foundation for upcoming features across the nammayatri/nammayatri repository.
December 2025: Security enhancements and SMS delivery expansion across two repositories. Implemented encryption for SMS configuration data to protect OTP credentials, and integrated Pinbix as an additional SMS provider to diversify delivery options. No user-reported defects; changes are designed to reduce risk, improve reliability, and support business goals. Demonstrates cross-repo collaboration with a focus on security, scalability, and vendor flexibility.
December 2025: Security enhancements and SMS delivery expansion across two repositories. Implemented encryption for SMS configuration data to protect OTP credentials, and integrated Pinbix as an additional SMS provider to diversify delivery options. No user-reported defects; changes are designed to reduce risk, improve reliability, and support business goals. Demonstrates cross-repo collaboration with a focus on security, scalability, and vendor flexibility.
Month: 2025-11. Delivered Pinbix SMS provider integration for OTP delivery in nammayatri/shared-kernel. Implemented new configurations, API handling, and response mapping to support additional mobile carriers and improve OTP reliability. This work extends provider options and strengthens the OTP delivery pipeline with Pinbix.
Month: 2025-11. Delivered Pinbix SMS provider integration for OTP delivery in nammayatri/shared-kernel. Implemented new configurations, API handling, and response mapping to support additional mobile carriers and improve OTP reliability. This work extends provider options and strengthens the OTP delivery pipeline with Pinbix.
Month 2025-10: Implemented Karix SMS provider integration across two repositories (shared-kernel and nammayatri), introducing new modules and refactors to support Karix in SMS handling, OTP delivery, and provider configuration. This work enables reliable, scalable SMS delivery through Karix and positions the platform for easier addition of future providers.
Month 2025-10: Implemented Karix SMS provider integration across two repositories (shared-kernel and nammayatri), introducing new modules and refactors to support Karix in SMS handling, OTP delivery, and provider configuration. This work enables reliable, scalable SMS delivery through Karix and positions the platform for easier addition of future providers.

Overview of all repositories you've contributed to across your timeline