Hello, I'mVishal Sah
Building the bridge between traditional systems and the decentralized future. Crafting scalable backends and innovative Web3 solutions.
Get to Know Me
Discover my background, skills, and what drives my passion for building innovative solutions.
My Story
Versatile backend engineer with expertise in both Web2 and Web3 technologies. Skilled in building scalable Node.js backends, Spring Boot microservices, blockchain protocols, and secure infrastructure.
B.Tech in Computer Science
Gyan Ganga College of Technology
CGPA: 7.61
const engineer = {
"focus": "Web2 ↔ Web3",
"passion": buildBridges()
};Web2
- Node.js & Spring Boot
- RESTful API Design
- Database Optimization
- AWS Cloud
Web3
- Smart Contracts
- Protocol Design
- NFT Standards
- IPFS & Lit Protocol
Passionate About
Languages
Backend & Systems
Databases
Web3 & Blockchain
Infrastructure
Tools & Platforms
Featured Projects
Here are some of the projects I've worked on. Each one represents a unique challenge and learning experience.
A decentralized music rental system using NFTs for content ownership and access control. Record NFTs represent music ownership, while rental NFTs grant time-bound access to encrypted content. Integrated Story Protocol for IP registration and Lit Protocol for cryptographic access control with TEE-backed secure decryption.
A domain-aware rate-limiting gateway supporting multiple customer domains with dynamic SSL certificate resolution. Built with NGINX/OpenResty and Lua scripting, featuring payment-gated API access, domain onboarding, billing systems, and comprehensive abuse prevention. Prevents free scraping while enabling monetized API usage.
More Projects
Built a production-ready RAG system integrating LLMs with PostgreSQL vector databases for Attenomics. Processed Twitter data, generated Jina embeddings, and implemented LangChain memory for persistent conversational context. Developed comprehensive backend APIs and deployed on AWS with scalable services and caching.
A full-stack mobile marketplace for buying and selling sneakers built with Flutter and Node.js. Features secure user authentication, real-time data synchronization, and a responsive mobile-optimized UI. RESTful APIs handle business logic with proper validation and error handling, while MongoDB stores user data, product listings, and transactions.
A backend-focused live streaming and video playback platform using RTMP, FFmpeg, and Node.js. Features live video broadcasting via RTMP protocol, video encoding and processing with FFmpeg, and efficient large file storage using MongoDB GridFS. Includes REST APIs for stream management, content delivery, and real-time interaction support.
A scalable backend system for processing and analyzing social media attention data at scale. Features automated daily data processing pipelines via cron jobs, ML-based attention metrics extraction, and secure REST APIs for analytics delivery. Built to handle 1,000+ users with optimized PostgreSQL queries and cloud-hosted infrastructure on AWS.
Work Experience
My professional journey and the valuable experiences that have shaped my career.
Software Engineering Intern
Built a RAG-based backend system integrating LLMs with PostgreSQL vector databases. Scraped and processed Twitter data, generated 1024-dimensional Jina embeddings, and implemented LangChain memory for persistent conversational context. Designed scalable backend services with async job handling and caching. Deployed production-ready systems on AWS for low-latency performance.
Get In Touch
I'm always open to discussing new opportunities, interesting projects, or just having a chat about technology. Let's connect!
Contact Info
I typically respond within 24 hours