Arya Pathak

Electronic Gift Voucher (EGV) platform · Merchant workflows, security, and data infrastructure.

Built and evolved merchant-facing EGV APIs for instant and bulk order creation, status and details, cancellation, merchant onboarding, balance top-up, and balance adjustment. Integrated Aerospike-backed distributed rate limiting with reservation, confirmation, and release semantics for daily and monthly payment limits. Designed reusable AES-256-GCM response-encryption infrastructure for sensitive APIs, and modernized database sharding, observability, transactions, and core service-platform integrations.

• Merchant APIs. Built merchant-facing EGV APIs covering instant and bulk order creation, status/details, cancellation, merchant onboarding, balance top-up, and balance adjustment across service, persistence, audit, and asynchronous processing layers.
• Distributed rate limiting. Integrated daily and monthly limits for EGV workflows using reservation, confirmation, and release semantics, backed by Aerospike for distributed state management, explicit failure handling, and end-to-end testing.
• Security infrastructure. Designed an annotation-driven AES-256-GCM response-encryption framework for sensitive APIs with pluggable encryption strategies, configurable key management, selective plaintext exposure, and tested failure paths.
• Database sharding. Modernized sharding across EGV services through shard-aware DAOs, query modes, ID generation, metrics, and transaction coverage while consolidating duplicated configuration and removing obsolete infrastructure.
• Platform modernization. Migrated core EGV services to a unified platform stack, resolving dependency, service-discovery, bootstrap, and HTTP-integration conflicts.

PPI platform engineering

Optimized EGV redemption with shard-level batch fetches for users with 300+ gift cards. Built operational tooling and improved CI, configuration, and test infrastructure.

• Redesigned EGV redemption by replacing per-card database queries with shard-level batch fetches after balance reservation, supporting users with 300+ gift cards without degrading performance.
• Built internal operational tooling and improved PPI engineering infrastructure through maker-checker workflows, isolated feature-environment CI, reusable test/configuration infrastructure, and HTTP integration modernization.

Built a Go-based Microsoft Teams agent to automate GCP onboarding and IAM operations using Gemini, backed by a secure Cloud Run service.

• Built and deployed a Go-based AI agent integrated with Microsoft Teams to automate GCP onboarding and IAM operations using Gemini API function calling, backed by a secure Google Cloud Run service.