SAMARTH SRIVASTAVA

Designed and shipped standalone Python microservices including a priority-based notification service (FastAPI, AWS Lambda workers, SQS/EventBridge, SendGrid/Twilio, async SQLAlchemy/Alembic) and a scalable PDF ticket generator (ReportLab) deployed via Terraform with DLQs and CloudWatch monitoring. Migrated legacy Perl ticket generation to Python microservices, improving ticket PDF generation time by 5x. Re-architected a ticketing service into a modern Laravel app and built a virtual waiting room to queue/throttle peak sale traffic, reducing p95 latency from ~1.2s to ~350ms. Rebuilt outbound email pipelines to increase throughput and reliability (5K→50K emails/hr) and converted blocking HTTP calls to queued background jobs. Integrated AI into data workflows and built MCP-based end-to-end AI workflows for P0 debugging; designed a config-driven fraud-protection engine and event-level delayed ticket delivery with signed PDF URLs and release-window restrictions.

Built a scalable serverless backend for FASTag recharge and vehicle services on AWS Lambda, API Gateway, and CloudFormation with autoscaling. Designed and shipped a Settlement SDK (PHP/Laravel) enabling partners to create settlement accounts, initiate settlements, and query status using token-authenticated APIs. Developed and maintained REST APIs for payment and settlement flows, improving reliability of transaction processing.

Developed backend services and REST endpoints for FASTag recharge and vehicle features. Contributed to AWS serverless infrastructure and internal tooling.