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Sambhav Jain

@sambhavjain7

Message

I build reliable Django payment and ticketing systems that handle millions of transactions.

India

Message

At ApniBus, I own Django/DRF backends for offline booth ticketing, POS conductor, and merchant applications, covering LLD, data models, REST APIs, service layers, and integrations.

I built an idempotency-first payment service with Redis-backed retry queues that reduced payment failures by 45% and sustained 99.95% uptime. I also led a zero-downtime AWS-to-GCP-to-Azure migration that improved service reliability by 35%.

Previously at Nykaa, I optimized RESTful APIs and migrated Magento APIs to Django REST Framework, improving throughput by 30% while reducing errors. I enjoy building production systems across payments, real-time sync, AI ticket verification, and multi-cloud infrastructure.

Experience

Work history, roles, and key accomplishments

Current

SDE 2

Current

ApniBus

Oct 2024 - Present (2 years)

Took end-to-end ownership of LLD and Django/DRF backend for offline booth ticketing, POS conductor, and merchant apps. Integrated Google Gemini API for AI-powered ticket verification and engineered idempotency-first DRF payment service with Redis-backed retry queues.

Django Django REST Framework Python Google Gemini API Redis Azure Service Bus Azure Functions PG Bouncer Event Driven Architecture Microservices System Design LLD

SDE 1

ApniBus

Aug 2023 - Sep 2024 (1 year 1 month)

Released production-ready Django REST Framework APIs for commuter, operator, business, gamification, and POS apps. Used Redis caching and Celery task queues to reduce PostgreSQL load and improve API response times.

Django Django REST Framework Python Redis Celery PostgreSQL JWT REST APIs Monitoring

SDE Intern – Backend

Nykaa E-Retail Pvt Ltd

Jul 2022 - Jul 2023 (1 year)

Optimized RESTful APIs across Python/PHP/Java stack, reducing response time by 20% and error rate by 10%. Migrated Magento APIs to Django REST Framework, increasing throughput by 30% and reducing error rate by 20%.

Python PHP Java Django REST Framework REST APIs Magento API Optimization