Raj Kumar
Paswan

Gurgaon

• →Own backend services and the Django admin platform powering daily operations for one of India's largest D2C dairy brands.
• →Re-architected high-traffic SQL queries and schemas, cutting report generation and API latency across core dashboards.
• →Built end-to-end stock and procurement workflows, improving inventory accuracy and reducing manual reconciliation.
• →Designed delivery-partner systems: onboarding, support, and automated salary/tips payouts at scale.

Noida

• →Owned architecture of 5+ production microservices (Django/FastAPI on AWS) serving 10,000+ concurrent users at 99.9% uptime.
• →Cut database load 60% and p95 latency 45% by eliminating N+1 queries and strategic indexing.
• →Reduced response time 40% with Redis caching and SQS/SNS event-driven decoupling.
• →Shipped a GPT-4 + LangChain RAG support chatbot automating 5,000+ conversations/month at 90%+ accuracy.
• →Cut deployment time 70% with Terraform, Docker and standardized CI/CD; mentored 3 engineers.

Kochi

• →Designed REST APIs sustaining 50,000+ daily requests at <100ms latency and 99.95% uptime.
• →Reduced response times 65% via query refactoring, connection pooling and Redis caching.
• →Scaled to 100,000+ daily Celery tasks with retry and dead-letter handling.
• →Implemented OAuth2 and Stripe/Razorpay integrations; cut production bugs 40%.

Pune

• →Reduced downtime 60% resolving critical production issues across Python services.
• →Automated health checks for 50+ servers, cutting manual interventions 80%.
• →Reduced MTTD 75% with CloudWatch + SNS alerting.

Noida

• →Built an HRM platform with IoT integration processing 10,000+ sensor data points daily.
• →Developed Django backend for employee management serving 500+ employees.