Ayush Sharma

Key Contributions Engineering Initiatives

• Tokenisation (RBI Mandate): Implemented gateway-agnostic token flow to meet RBI compliance, eliminating card storage and enhancing security.
• 3DS2 Migration: Led migration from 3DS1 to 3DS2 across Visa, Mastercard, and Amex with zero downtime; supported post-rollout triaging and merchant onboarding.
• Push Provisioning: Designed and launched a multi-merchant tokenization portal (Swiggy, Zomato, Urban Company) in 1 month; presented at GFF 2024.
• Bin Service (DynamoDB, S3, gRPC): Built a 12K TPS IIN lookup service with 50ms latency and dynamic feature toggles based on issuer metadata.
• Card Authentication: Improved OTP success rates by enhancing in-house ACS, outperforming legacy bank-loaded ACS flows.
• Partner Payments: Integrated Cred Pay and Apple Pay into Razorpay Checkout for secure device-token-based transactions.
• Architecture & Migration: Rewrote legacy PHP modules in Golang; authored tech specs and contributed to system design reviews across teams.
• Monitoring & Reliability: Improved production observability via optimized PagerDuty alerts and Grafana dashboards, reducing MTTR.
• Mentorship & Security: Mentored engineers, enforced secure coding practices, conducted code reviews, and led vulnerability remediation efforts.

Key Contributions System Design & Optimization

• Self-Onboarding Platform: Built a self-serve onboarding system enabling hotel owners to list properties in ~30 minutes (down from ~15 days), with real-time verification and validation.
• China Tech Stack Migration:
  Migrated global supply products to China’s tech stack (Spring Boot, Kafka, Redis, Postgres, S3).
  Led data migration from AliCloud to AWS China and transitioned to Kubernetes-based deployments, improving scalability and reducing infra cost.
• Discover Program Integration: Developed APIs for the Cerebrum platform, enabling BDs and hotel owners to track daily room nights and performance metrics.
• Campaign CSV Generator: Created a service to compile property-level campaign data and export on-demand reports in CSV format.
• Performance Tuning: Improved backend performance by implementing efficient algorithms for data-heavy endpoints.
• Scalable Architecture: Helped design modular systems to support rapid expansion and regional deployment needs.