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gaganr489

Gagan

@gaganr489

Backend Engineer NodeJS NestJS GraphQL AWS

India
English, Kannada, Hindi
About me
I build fast, reliable backends for SaaS products and startups. Backend engineer with 2.5 years building multi-tenant SaaS for 500+ enterprise customers and 50K+ daily API requests: GraphQL APIs, AWS fraud detection, Temporal and Kafka workflows. I've also launched two products of my own with paying users. I can help with: • REST and GraphQL APIs (Node.js, NestJS, FastAPI) • PostgreSQL and Redis design and optimization • Auth, payments and AI/LLM integrations • Docker, CI/CD and AWS deployment Message me with what you're building!... Read more

Skills

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gaganr489
Gagan
Offline • 

See my services

API & Integrations
I will build a scalable rest or graphql API with nodejs and nestjs
From$40 / projectMore details
Bug Fixes
I will fix nodejs backend bugs and optimize postgresql queries
From$30 / projectMore details

Portfolio

Work experience

Talview

Associate Software Engineer

Talview • Full-time

Feb 2024 - Jul 2026 • 2 yrs 5 mos

Backend engineer on a SaaS proctoring and assessment platform used by 500+ enterprise customers. • Architected a GraphQL API layer (Hasura, PostgreSQL) serving 50K+ daily requests, with OAuth 2.0, JWT and role-based access control • Built real-time fraud detection with FingerprintJS Pro and AWS Lambda@Edge, cutting fraudulent sessions by ~25% • Designed session replay infrastructure with Kafka and S3, and orchestrated long-running workflows in Temporal with zero-downtime rollouts • Resolved a production SSO failure for a Fortune 500 client and led a zero-data-loss migration for another enterprise client • Automated CI/CD with Docker and Kubernetes, cutting release time by 30% • Received the Quarterly Champion and Key Player awards (2025)