UK
ProjectsExperience

Uttam Kumbhakar

Python Backend Engineer

Real-time systems · Automation · 100+ shipped projects

Uttam Kumbhakar
Open to work
Python Backend Engineer
Dhanbad (JH), India
blocksdev.pro
06:26 (Local)
mail@blocksdev.pro
he/him
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About

Self-taught Python backend engineer with 3+ years of experience delivering 100+ projects for international clients across APIs, automation systems, bots, scrapers, AI integrations, and payment processing. Earned ₹60L+ in freelance revenue working with clients across the US, Europe, and Southeast Asia. Currently building FastQ and learning Rust. Looking for a full-time remote backend role.

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Stack

Python FastAPI PostgreSQL AsyncIO Redis Docker WebSockets REST APIs MongoDB Nginx Pytest gRPC Rust (learning)

Experience

Freelance Backend Engineer

Jan 2022 – Present
Independent Contractor • Remote (International — US, Europe, SEA)
  • Delivered 100+ backend projects for international clients via Fiverr, Upwork, and direct referrals — earning ₹60L+ over 3 years.
  • Built REST APIs, automation pipelines, Telegram bots, web scrapers, AI/LLM integrations, and payment systems across dozens of client verticals.
  • Operated across the full delivery lifecycle: scoping, architecture, implementation, deployment, and post-launch support.
  • Maintained high client satisfaction with repeat business and long-term retainer relationships across multiple timezones.

Backend Developer

March 2025 – August 2025
Async Integrations d.o.o. • Remote (Zagreb, Croatia)
  • Designed and implemented FastAPI microservices for a multi-tenant CRM serving real-time dashboard data.
  • Optimized PostgreSQL queries, reducing API response times under production load.
  • Implemented JWT & OAuth 2.0 authentication across backend services.
  • Integrated Pipedrive CRM API with retry logic and fault tolerance.
  • Dockerized and deployed services to DigitalOcean.

Projects

2
💎
Production TRON blockchain payment processor built from scratch — no third-party SDK. Achieved sub-1-second transaction detection via WebSocket event streaming, faster than Tronscan's own indexer. Ran reliably on a 2-core/4GB VPS using TronGrid's free tier through aggressive async optimization.
  • ⚡ Faster than Tronscan's own indexer
  • 🔍 Full TRC20 event log parsing
  • 🔔 Two-phase payment confirmation
  • 🔐 Multi-tenant wallet management
  • ♻️ Fault-tolerant WS reconnection with missed-block recovery
  • 🖥️ Free WebSocket API on a 2-core/4GB VPS
PythonAsyncIOWebSocketsMongoDBTronGrid API
🥗
Snap photos of meals and get instant nutritional breakdowns. AI-powered platform converting visual data into macro feedback with smart journaling and analytics.
  • 📸 Instant food recognition from photos
  • 🤖 AI-powered macro calculation
  • 📊 Smart journaling with progress tracking
  • ⚡ Sub-2 second image analysis
  • 🔐 Privacy-first with local storage option
Next.jsFastAPIComputer VisionPostgreSQLOpenAI

Education

Binod Bihari Mahto Koyalanchal University

B.Com

Feb 2028 (Expected)

Languages

English

Fluent

Hindi

Native
UK