Headline

Full Stack & Backend Developer | Java · Spring Boot · React · Node.js | Google Solution Challenge Top 105 Global (0.16%) | B.Tech IT ’26 | Open to SWE Roles & Internships

About

Top 105 of 64,000+ participants (top 0.16%) — GDG Solution Challenge 2025, selected across 3,700+ projects worldwide. I build production-ready systems, not just portfolios. Here's what I've shipped: → MeshPay — an offline payment settlement network that routes payments across a peer mesh using gossip-based forwarding and hybrid RSA-OAEP + AES-256-GCM encryption. Built on Java, Spring Boot, and PostgreSQL. Deployed live on Render. No internet required, no central server. → Blockchain Certificate Platform — tamper-proof ERC-721 NFT certificates on Ethereum Sepolia, with IPFS metadata pinning and one-scan QR verification. No database. No central authority. No forgery. Stack: Java · Spring Boot · React.js · Node.js · PostgreSQL · Docker · REST APIs · Solidity · IPFS Core CS: DSA · System Design · Operating Systems · Computer Networks · DBMS 200+ problems solved on LeetCode, GFG, and CodeChef. 1st Place — RCET Departmental Project Competition 2025 (AI-driven IP detection system). Microsoft Learn Student Ambassador. Final-year B.Tech IT @ RCET Bhilai (May 2026). Open to full-time SWE roles and backend internships from June 2026 onward. 📩 sauravkumar9447@gmail.com | 🔗 github.com/saurav7557 | 💼 Portfolio: saurav-portfolio-roan.vercel.app

Location

Bengaluru

AI stack

antigravity

claude code

codex

cursor

github copilot

lovable

Work experience

Backend Engineer(Personal Project) at Self-Employed, May 2026 - Present · 5 mos, Bhilai, Built MeshPay — a cryptographically secured offline payment settlement network designed for low-connectivity environments where standard UPI fails. • Designed gossip-based payment routing with TTL-controlled forwarding across a peer mesh — independent of central payment servers. • Implemented hybrid RSA-OAEP + AES-256-GCM encryption with SHA-256 hashing for replay-attack prevention and idempotent processing — crypto stack built from scratch. • Developed REST APIs spanning the full transaction lifecycle (creation → bridge ingestion → real-time mesh monitoring → settlement) on Spring Boot + Hibernate + PostgreSQL. • Containerized with Docker Compose, documented with Swagger/OpenAPI, and deployed on Render cloud.

Education

Bachelor of Technology - BTech, Information Technology, Rungta College of Engineering & Technology Kohka-Kurud Bhilai

12th, Bihar School Examination Board (BSEB)