Open to Senior Engineering Roles

Domeshwar Kumar

Sr. Backend Engineer & Team Lead · Python · Django · AI

8+ years engineering scalable fintech systems, AI-powered SaaS and enterprise payment infrastructure — from zero to millions of users.

View Work → ↓ Resume

Years Exp

TXN / Month

App Users

Projects

Available for hire

Raipur, IN · Remote OK

[ 01 / 06 ] About

Senior engineer. Team leader.

I am Domeshwar Kumar — a Senior Backend Engineer & Team Lead with 8+ years of experience architecting production-grade fintech backends, AI-integrated SaaS products, and enterprise payment infrastructure.

At GimBooks (Gim Info Solutions), I designed every critical system from the ground up: a payment engine processing ₹100Cr+ monthly at 99.9% uptime, a Flutter platform with 5M+ downloads and 3M+ active users, real-time CRM dashboards, and 10+ live GST/KYC/banking integrations.

"Focused on clean architecture, AI-driven engineering, and systems built to last. I write code that teams are proud to maintain."

System DesignAI IntegrationPayment SystemsFlutterAPI ArchitectureTeam LeadershipAWS / GCPCI/CD

⚡

Backend Architecture

Django, FastAPI, DRF — APIs serving millions

🤖

AI Engineering

OpenAI, LLMs, intelligent automation

💳

Payment Infra

Multi-gateway, KYC, fraud detection

📊

SaaS at Scale

Zero to 3M+ users ownership

🔄

Async Systems

Celery, Redis, WebSocket pipelines

🐳

DevOps

Docker, Nginx, GitHub Actions, Cloud

[ 02 / 06 ] Skills

Full-stack depth

Eight years across the entire stack — from async queues to mobile UIs.

Backend Engineering

PythonExpert · 8+ yrs

Django & DRFExpert · 7+ yrs

FastAPIAdvanced · 3+ yrs

Celery & AsyncAdvanced · 5+ yrs

PostgreSQLAdvanced · 6+ yrs

RedisAdvanced · 5+ yrs

AI & Cloud

AI / LLMAdvanced · 2+ yrs

OpenAI APIsAdvanced · 2+ yrs

DockerAdvanced · 4+ yrs

AWS / GCP4+ yrs

Mobile, Frontend & Payments

FlutterAdvanced · 4+ yrs

React3+ yrs

Payment APIsExpert · 5+ yrs

GST / KYC / IRNExpert · 4+ yrs

[ 03 / 06 ] Experience

Engineering journey

Sept 2020 — Present · 4+ yrs

Gim Info Solutions Pvt. Ltd. (GimBooks)

Full Stack Backend Engineer & Team Lead · Raipur, IN

Led backend engineering for GimBooks — India fintech platform for 3M+ SMBs. Architected payment engine handling ₹100Cr+ monthly at 99.9% uptime with multi-gateway routing, KYC automation (PAN+Aadhaar), real-time fraud detection. Shipped Flutter app from 0 to 5M+ downloads. Built CRM (React+Django+Redis), GST engine, 10+ live banking integrations. Led engineering hiring, code reviews and cross-team technical leadership.

PythonDjangoDRFFastAPICeleryRedisPostgreSQLFlutterFirebaseAWSGST/KYCRazorpay

Sept 2017 — Sept 2020 · 3 yrs

CodeNicely Software Services LLP

Full Stack Software Engineer · Raipur, IN

Architected scalable ERP systems and built a Document Management System with version control and automated categorization — improving retrieval efficiency by 50%. Delivered client apps across e-commerce, logistics and SaaS using Django, Celery, Django Channels (WebSocket) and PostgreSQL.

PythonDjangoREST APICeleryDjango ChannelsWebSocketPandasPostgreSQL

[ 04 / 06 ] Projects

Systems built at scale

Production systems serving real users. Not side projects.

💳Production

Payment Infrastructure

GimBooks Payment Engine

Multi-gateway orchestration with KYC gate, real-time fraud detection, idempotent APIs. ₹100Cr+ monthly at 99.9% uptime.

DjangoCeleryRedisKYC APIs

📱5M+ Downloads

SaaS Platform

GimBooks SMB App

Mobile-first bookkeeping for 3M+ SMBs. GSTR filing, e-Way Bill, e-Invoice, in-app payments. Built from 0 to 5M+ downloads.

FlutterDjangoGSP APIsFirebase

🤖AI-Powered

AI SaaS

AI SaaS Automation

LLM-powered workflow automation using OpenAI APIs for intelligent document processing and BI reporting.

PythonFastAPIOpenAICelery

📊Live

Real-Time Dashboard

GimBooks CRM

RBAC admin dashboard with live monitoring, Chart.js analytics and Redis-powered real-time notifications.

DjangoReactRedisChart.js

🧾Live

Compliance Engine

GST Automation Engine

End-to-end GST: GSTR filing, IRN, e-Way Bill, eSign. Provider-agnostic with circuit-breaker pattern.

DjangoGSP APIsKYCeSign

🚛Live

Marketplace API

Vahak Marketplace

Scalable freight marketplace REST APIs with Google recommendation engine serving millions of transporters.

PythonDjangoMySQLAWS

[ 05 / 06 ] AI Toolkit

AI tools I use daily

Leveraging AI to engineer faster, smarter and better every day.

🤖

Claude (Anthropic)

AI Assistant

Primary AI coding and architecture assistant. Complex Django system design, code reviews, debugging distributed systems.

Code ReviewArchitecture

💬

ChatGPT (OpenAI)

AI Assistant

Rapid prototyping, explaining complex algorithms, generating boilerplate, exploring alternative engineering approaches.

PrototypingResearch

👾

GitHub Copilot

Code Completion

Real-time completion in VS Code. Accelerates Django views, Celery tasks, DRF serializers and SQL queries.

AutocompleteProductivity

🔗

LangChain

LLM Framework

Production LLM apps: RAG pipelines, document Q&A and intelligent agents with PostgreSQL vector stores.

RAGAgents

⚙️

OpenAI API

LLM Integration

GPT-4, embeddings and function calling integrated into production SaaS for document processing and automation.

GPT-4Embeddings

🤗

Hugging Face

ML Models

Open-source models for text classification and NER for GST document processing in Indian fintech use cases.

Open SourceNER

[ 06 / 06 ] Contact

Let's build something great

Open to Senior Engineering Lead roles, backend consulting and AI-powered SaaS projects. Remote-first, open to relocation.

Email
domeshwarkmr@gmail.com Phone
+91 8253059434 LinkedIn
linkedin.com/in/domeshwar GitHub
github.com/Domeshwarkmr WhatsApp
Message directly