UK
Uttam Kumbhakar
Junior Backend Developer
Building scalable backend systems and secure APIs with clean code and attention to detail.
Open to work
About
Junior Backend Developer with hands-on experience building and deploying scalable APIs using FastAPI and NestJS. Skilled in authentication systems, PostgreSQL database design, and integrating third-party APIs like Pipedrive. Worked as part of a 4-person engineering team, contributing to a multi-tenant sales portal and deploying services on DigitalOcean. Passionate about backend engineering, automation, and continuously improving technical skills.
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Stack
FastAPI NestJS PostgreSQL JWT & OAuth 2.0 API Development DigitalOcean Backend Engineering Web3 Docker Git
Experience
Junior Backend Developer
March 2025 – August 2025Async Integrations d.o.o. • Remote (Zagreb, Croatia)
- Developed and maintained scalable REST APIs using FastAPI and NestJS.
- Designed and optimized PostgreSQL schemas, queries, and migrations.
- Implemented secure authentication flows including JWT and OAuth 2.0.
- Integrated third-party services such as Pipedrive CRM into backend systems.
- Deployed and managed backend applications on DigitalOcean infrastructure.
- Built core backend modules for a multi-tenant sales portal platform.
- Collaborated with a 4-person development team and participated in code reviews.
Projects
1Tron Payments API
Feb 2022 – Nov 2023
A fully automated Crypto Deposit & Webhook System built to solve limitations of existing gateways. Supports TRX and TRC-20 tokens with complete flexibility.
FastAPIBlockchainTron/TRC-20WebhooksRedis
Education
PK ROY MEMORIAL COLLEGE
B.Com
Languages
English
Hindi
UK