name: Sumit Jain
role: Junior Software Developer @ Techspawn Solutions
location: Pune, Maharashtra, India
degree: B.Tech in IT (Honors in ML) · CGPA 8.95/10
focus: backend-heavy product engineering
loves: APIs · queues · webhooks · inventory flows · auth · dashboards
learning: system design · DSA in C++ · production TypeScript/Node.js
open_to: SDE-1 / Software Developer roles- 🏢 Building commerce & marketplace integrations for a multi-tenant OMS.
- 🎓 B.Tech in Information Technology with Honors in Machine Learning, Walchand Institute of Technology.
- ⚙️ I like the hard, reliable parts of a product: event-driven workflows, idempotency, retries, and data consistency.
- 🚀 Currently deepening system design through real projects instead of only diagrams.
| Area | Tools |
|---|---|
| Backend | Node.js · Express.js · NestJS · REST APIs · Prisma · Redis · BullMQ · JWT · OAuth · Webhooks |
| Frontend | React.js · TypeScript · Vite · Tailwind CSS · Three.js |
| Databases | PostgreSQL · MongoDB · MySQL · Firebase |
| Cloud & Tools | Git · GitHub · Docker · Postman · Vercel · Oracle Cloud (OCI) · Medusa.js |
| Languages | C++ · JavaScript · TypeScript · Python · Java |
- Built an end-to-end Wix integration for a multi-tenant OMS (OAuth install flow, token exchange, automated sales-channel + stock-location setup) — cutting merchant onboarding time by 60% and enabling 500+ stores.
- Implemented a JWT-verified webhook handler (RS256) routing Wix events into BullMQ workers, handling 50K+ events/day at 99.9% reliability.
- Added bidirectional disconnect/uninstall handling and initial import jobs, reaching Shopify/WooCommerce parity and reducing support tickets by 25%.
- Built shipping integrations with FedEx and Canada Post using OAuth, XML/REST APIs, and Medusa fulfillment services.
- Implemented product & inventory synchronization across multi-channel marketplaces using event-driven workflows.
- Enhanced catalog management using Node.js, TypeScript, React, Redis, and Medusa v2.
- Developed an inventory management system with Java, XML, Firebase, REST APIs — improved tracking speed by 30%.
- Implemented barcode automation, cutting order-fulfillment errors by 15%.
- Automated stock categorization, improving update efficiency by 50%.
|
Source-of-truth order & inventory management for multi-location commerce. NestJS · React · TS · Prisma · PostgreSQL · Redis · BullMQ · Docker Event-sourced inventory ledger, Available-to-Promise engine, split-shipment sourcing, order state machine, returns, reconciliation, Shopify sync & Stripe payments. 🔗 Live: oms-system-theta.vercel.app |
Inventory drift detection & correction service for OMS ↔ sales-channel consistency. TypeScript · NestJS · Queues · Idempotent Jobs Detects stock mismatches, retries correction flows, and keeps an auditable trail to reduce overselling risk. |
|
AI-assisted code review on the MERN stack + Google Gemini. MERN · Google Gemini · Express APIs Reduced manual review time by 60% with automated bug detection and real-time feedback. |
Interactive algorithm learning platform. React.js · Three.js · JavaScript Visualizes 20+ sorting/searching algorithms with step-by-step execution, race mode & leaderboard. |
|
C++ low-level design project focused on clean architecture. C++ · OOP · SOLID · Design Patterns Driver matching, pricing logic, ride tracking & CLI simulation. |
My ongoing DSA practice in C++. C++ · Problem Solving Structured solutions and patterns as I sharpen data structures & algorithms. |
- 🥇 Winner — National Level Hackathon, WITchar
- 🥇 2× Winner — Coder Army Nexus Online Hackathon
- 🎯 Top 10 — Smart India Hackathon (College Level)
- ☁️ Oracle Cloud Infrastructure — Generative AI Professional
- ☁️ Oracle Cloud Infrastructure — AI Foundations Associate
- 🧱 Building backend systems for orders, inventory, webhooks, sync jobs, and marketplace integrations.
- 🧠 Practicing DSA in C++ through Leetcode-DSA.
- 📐 Deepening system design through real, production-grade projects.
💬 Open to SDE-1 / Software Developer roles where I can build reliable products and keep learning fast.