Headline

Software Engineer @ Techspawn | Backend & Distributed Systems | Node.js · NestJS · TypeScript · PostgreSQL · Redis | Building scalable OMS & integrations

About

Backend-focused Software Engineer at Techspawn Solutions, building distributed, multi-tenant systems that scale to hundreds of stores and 50K+ events a day. I work primarily with Node.js, NestJS, TypeScript, PostgreSQL, and Redis, and I like the hard parts of backend: event-driven architectures, event sourcing/CQRS, OAuth 2.0 flows, webhook processing, and third-party integrations (Shopify, Wix, WooCommerce, Stripe, FedEx). Recently I shipped an end-to-end Wix integration for an Order Management System that cut merchant onboarding time by 60%, and built a JWT-verified webhook pipeline handling 50K+ events/day at 99.9% reliability. B.Tech in IT (Honors in ML), CGPA 9.0/10. OCI Generative AI Professional certified. 350+ DSA problems solved. Open to backend / full-stack Software Engineer roles. Reach me at sumitjain0721@gmail.com.

Location

Pune District

AI stack

claude

codex

opencode

Work experience

Junior Software Developer at TechSpawn Solutions, May 2026 - Present · 3 mos, • Built end-to-end Wix integration for the multi-tenant OMS — OAuth install flow, access token exchange, and automated sales channel + stock location setup. • Implemented a JWT-verified webhook handler (RS256) routing Wix product, order, inventory, and customer events into BullMQ workers for async processing. • Added bidirectional disconnect/uninstall handling and initial product + customer import jobs, achieving parity with the existing Shopify and WooCommerce flows.

Trainee Software Developer at TechSpawn Solutions, Dec 2025 - Apr 2026 · 5 mos, • Built the FedEx shipping integration as a Medusa fulfillment provider — OAuth auth, rate estimation, shipment creation, and label generation. • Fixed import/export bugs in the Shopify and WooCommerce sync pipelines, improving reliability for product, customer, and order syncs. • Shipped admin UI enhancements — rebuilt the filter bar, improved the search menu UX, and polished multiple data tables and forms across the dashboard.

Android Developer at Shree Ramdev Enterprises, Nov 2024 - Feb 2025 · 4 mos, Solapur, Maharashtra, India, • Developed an inventory system using Java, XML, Firebase, and REST APIs, improving tracking speed by 30%. • Implemented order management and billing modules that reduced manual entry errors by 40%. • Automated stock categorization, increasing inventory update efficiency by 50%.

Education

Bachelor of Technology - BTech, Information Technology, Walchand Institute of Technology, Solapur