Pankaj Kumar

Designed high-performance FastAPI services and 20+ Python automation tools (Motor/async MongoDB, SQLAlchemy/MySQL) for multi-tenant Healthcare, Insurance, and Mortgage clients saving 500+ Engineering and Sales hours per quarter and enabling onboarding of million-dollar enterprise logos by accelerating platform fit and expansion contract delivery. Architected and implemented ZEGA (Zenith GitHub App), a high-performance FastAPI token-management service replacing hardcoded PATs with dynamic GitHub App token generation across 180+ repos, 3 environments (dev, QA, prod), and all Ushur CI/CD systems backed by Redis caching to sustain 500+ requests/minute at peak monthly release windows. Eliminated a hard scalability ceiling: PATs are limited to 5,000 tokens/hour per GitHub account vs. 15,000 tokens/hour per repo with GitHub Apps directly unblocking release cadence scale across growing customer infrastructure while eliminating hardcoded credential security risk. Designed fault-tolerant, event-driven data pipelines (SQS with dead-letter queues, EventBridge, Lambda, S3) with KMS-at- rest encryption, Secrets Manager, and least-privilege IAM achieving 75% faster data product delivery, compliance-grade audit readiness, and zero critical security incidents in regulated Healthcare and Insurance production. Hardened API security with AWS WAF on API Gateway, Vault-integrated credential management, and per-service IAM least- privilege across all 65 microservices maintaining a zero critical security incidents record across regulated production environments. Resolved a systemic CI/CD bottleneck where 65+ microservices were coupled in a single monolith pipeline, blocking all teams on any one failure. Re-architected to independent pipelines each service builds and ships in ~1 minute; all 65 complete in 67 minutes, delivering 9x build concurrency and 40% shorter release cycles. Built 'Zenith,' a FastMCP server enabling engineers to manage all 65 repos branching, PRs, and CI/CD directly from Cursor, VSCode, and PyCharm. Recovered 70 engineering hours/week (~$8,400/week) for a 70-person US/India team by eliminating GitHub UI context-switching entirely. Integrated SumoLogic observability (log aggregation, metrics dashboards, real-time alerting) across the full platform reduced incident detection and resolution from 8+ hours to minutes, replacing reactive customer escalations with proactive monitoring and improving SLA reliability for Healthcare and Insurance accounts.

Serverless Python backend engineering for a global FinTech platform serving millions of users. Built Django REST Framework APIs (SQLAlchemy, DynamoDB, AWS Lambda, API Gateway) supporting millions of daily transactions secured with WAF, VPC endpoints, and X-Ray tracing; zero compliance incidents on a regulated FinTech payments platform. Engineered a distributed event-driven marketing platform (EventBridge, Lambda, SNS fan-out, per-channel SQS with reserved concurrency) scaled PayPal from 1 to 200+ personalised campaigns/day per region for millions of users globally, directly driving user acquisition and retention revenue. Replaced batch warehouse reporting with a serverless analytics pipeline (Kinesis Firehose S3 Parquet Glue Athena) delivered same-day campaign performance insights from a daily lag and eliminated ad-hoc warehouse query costs.

Architected and delivered Django REST Framework APIs (SQLAlchemy, PostgreSQL, DynamoDB, AWS Lambda) for decathlon.in scaled to 510M monthly active users, contributing to 2030% digital revenue growth for India's largest sporting goods retailer. Led and mentored a backend team of 8 engineers. Designed for performance and reliability at national E-commerce scale implemented SQLAlchemy connection pooling, PostgreSQL query optimisation, and ElastiCache-backed caching ensuring consistent sub-200ms API response times at peak load across web, Android, and iOS. Led monolith-to-microservices transformation with RabbitMQ for async distributed inter-service messaging eliminated cross-service release coupling, improved deployment independence, and increased fault isolation and platform resilience at national scale. Designed and launched AllForSport (now Decathlon Play) from 01 DRF APIs, Motor/MongoDB, RDS Aurora Multi-AZ, ElastiCache built for high availability and fault tolerance; created a new recurring revenue stream by monetising vacant sports facilities nationally. Led a team of 5 from zero to production.

Built a Django REST Framework Seat Management platform (MySQL) enabling enterprise business units to self-serve seat and workspace allocation across locations reduced manual onboarding effort and improved operational efficiency at scale.