open to backend / full stack / genai roles

$ whoami

Sumit Kumar

Full Stack Developer building backend systems, data pipelines, and GenAI agents — currently shipping production network-management software in Kolkata.

I build backend systems and data pipelines for production telecom infrastructure, and spend my off-hours pushing GenAI agents through hackathons and competitions.

JavaSpring BootApache KafkaPostgreSQLReactPythonLangChainNode.js
Sumit Kumar
online
system status
all systems nominal

NMSWorks — DMS & Dashboard

prod · Java / Spring Boot

online

Kafka Streaming Pipeline

real-time · Apache Kafka

online

PostgreSQL Cluster

tuned · indexing + query opt

online

GenAI Agent Lab

active · hackathon builds

building

uptime

3+

years in prod

since

Mar 2023

career start

base

Kolkata

IN · GMT+5:30

featured work

Recent builds

Multi-Modal Claim Verification Agent

competition

Jun 2026 — HackerRank Orchestrate

Vision-driven pipeline that cross-checks insurance damage photos against claim narratives and flags inconsistencies automatically.

Built for the HackerRank Orchestrate June 2026 challenge. Ingests a batch of insurance claims, runs each submitted image through a vision-capable model alongside the written description, scores narrative-image consistency, and outputs a structured verification report across all 44 claims in the set. Handled real-world input mess along the way: AVIF-to-JPEG conversion, Windows PowerShell environment quirks, and API key/config wrangling.

PythonClaude APIVisionCSV PipelinesPowerShell

Multi-Domain AI Triage Agent

competition

HackerRank Orchestrate

An agent that routes incoming requests across domains and prioritizes them automatically — placed in the global top tier of the hackathon.

Designed a triage system that classifies and routes multi-domain requests (support, technical, escalation) using LLaMA 3.3-70B served through the Groq API, optimizing for both latency and routing accuracy. Achieved a notable global ranking in HackerRank's Orchestrate hackathon field.

PythonGroq APILLaMA 3.3-70B

Vera — Merchant AI Assistant

shipped

magicpin AI Builder Challenge

A Spring Boot-based conversational bot that helps merchants manage listings, offers, and queries — live on Railway.

Built end-to-end for magicpin's AI Builder Challenge: a Spring Boot backend wired to an LLM for natural-language merchant support, deployed to Railway for public access. Focused on reliable conversation state handling and fast response times for non-technical merchant users.

Spring BootJavaLLM IntegrationRailway
All projects

career log

Where I've worked

Software Engineer · NMSWorks Software

Apr 2024 — Present

Kolkata, India

JavaSpring BootApache KafkaMySQLJenkinsTomcat

Project Technical Support III Programmer · ICMR — National Centre for Disease Informatics and Research

Mar 2023 — Apr 2024

India

ReactAngularVB.NETPHPMySQL
Full history

let's talk

Hiring for backend, full stack, or GenAI?

I'm actively looking for my next role — product companies, SaaS teams, and fast-growing startups across India, remote or onsite.

Get in touch