About Me
Hi, I’m Harmeet Singh, a software developer with a passion and rich background in building both Web2 and Web3 applications. Having a full-stack development background, I work independently to offer end-to-end solutions that include developing responsive and dynamic frontends to building stable backends and creating secure smart contracts for decentralized applications. Over my years of practice working on a wide variety of projects from traditional centralized systems to cutting-edge blockchain technology, I have been able to integrate the best of both worlds—applying proven and reliable Web2 approaches while embracing the innovations of Web3. Whether I am designing a seamless user interface to a web application or deploying a decentralized application to the blockchain, I approach every project with precision, creativity, and a can-do attitude.
As a solo developer, I am personally accountable for each step of development. I am not just coding; I am building thoughtful, functional, and scalable applications that will solve real-world needs. My aim is always to create neat, maintainable code and products that perform well under load—no shortcuts taken, no compromises.
My Objectives Driving Innovation
I believe that continuous learning and innovating is essential to aboth professional and personal
growth. The technology industry is constantly evolving, especially in the rapidly developing
space of Web3. I make it my responsibility to stay updated with new tools, frameworks, and
trends so that I can offer solutions that not only represent today’s times but also look to the
future.
Security and performance are two vital pillars of my work. While developing a centralized
platform or a decentralized application, I follow best security and optimization practices to make
what I create secure and stable. This is particularly crucial in smart contract development, where
precision and trust cannot be sacrificed.
Let’s join forces and create solutions that not only innovate but also make a difference. If you’re
looking to create a new web platform or venture into the decentralized space of Web3 for the
very first time, I can help you make your vision a reality
Modern Technologies I Use to Build Fast, Scalable Applications
Technologies I Use for Custom Web Development
ReactJS
Next.js
Redux Toolkit
AngularJS
Vue.js
Svelte
React Native
Capacitor
TypeScript
JavaScript
Electron.js
Node.js
Express.js
Fastify.js
Rust
GoLang
Nest.js
GraphQL
REST APIs
WebSockets
JWT
OAuth
Refresh Tokens
CORS
Swagger
Postman
PostgreSQL
MySQL
MongoDB
Redis
Elasticsearch
Sequelize
Mongoose
Gorm
Gin
Zookeeper
grpc/http2
RabbitMQ
Kafka
API Gateway
NGINX
Docker & Docker Compose
Kubernetes
BullMQ
AWS Lambda
AWS ECS
AWS EKS
AWS EC2
AWS S3
AWS Secret Manager
AWS CloudWatch
AWS Elasticsearch (OpenSearch)
AWS Managed Grafana
AWS Lens
GitLab
Github
BitBucket
Smart Contracts (Solidity)
Web3
Web3Auth
Ethers.js
Ethereum
Binance Smart ChainPolygon
Fantom
Arbitrum
Cosmos
SolanaTron
Klaytn
Bitcoin
Bitcoin Cash
Litecoin
Liquid Bitcoin (LBTC)
XRP
MetaMask
WalletConnect
Coinbase Wallet
MultiSig Wallets
Custodial & Non-Custodial Wallets
NFTs (ERC-721/1155)
OpenZeppelin
SlitherHardhat
Alchemy
Infura
IPFS
Pinata
BIP-32
BIP-39
BIP-44
Hierarchical Deterministic (HD) Wallets
Elliptic Curve Cryptography (secp256k1)
Moralis
EsLint
dotenv
Mocha
chai
Helmet.js
Rate limiting
Input Sanitization
npm packages
go packages
YAML
My Experience
Your Product, Powered by My Expertise.
Blending the power of Web2 and Web3 to build scalable, secure,and smart applications.
Full-Stack Development
Blockchain Development
API Development & Integration
Smart Contract Development
Code Audits & Security Reviews
Performance Optimization
Case Studies & Projects — From Idea to Scalable Product
Jiggle Wallet
As Full-Stack Developer and Team Lead, I created Jiggle Wallet, a scalable crypto wallet app offering unified multi-network management, secure transactions, and advanced wallet features. Its key innovation is MPC-enhanced security via threshold cryptography, sharding private keys for superior protection.
I optimized performance for cross-platform (app/web via Capacitor) deployment. My responsibilities spanned full-stack MERN development (Node.js backend, React/TypeScript frontend), system architecture guidance, and leading code reviews. I implemented Redis caching, custom payment requests, and integrated multiple blockchains. Swagger was used for API documentation. Jiggle Wallet features in-app fiat-to-crypto onramps/offramps via Banxa and Paybis.
I ensured clear communication with stakeholders through agile practices, providing technical updates and strategic insights. This project demanded expertise in blockchain, smart contracts, performance, and security, resulting in a user-friendly, enterprise-grade wallet with advanced cryptographic protection.
Tech Stack: MERN Stack, Node.js, React (TypeScript), Redis, Capacitor, Swagger, Banxa, Paybis, Payment Gateway Integration.
Fanverse
As Web3Auth & Smart Contract Integration Lead for Fanverse, a Web3 platform, I spearheaded the integration of smart contracts and wallet systems for a seamless user experience across crypto-native and new users. A key achievement was implementing Web3Auth, supporting both custodial and non-custodial wallets with Torus Wallet as the default for secure, social-login onboarding.
I developed ERC-1155 smart contracts enabling multi-edition NFT minting, reducing gas costs and allowing flexible ownership. The project also incorporated lazy minting and voucher-based distribution for enhanced efficiency. I contributed to the microservices backend architecture using React, Node.js, MySQL, Redis, and Docker, ensuring robust NFT management and performance.
Collaborating closely with design and blockchain teams through agile practices, I focused on aligning technical development with product vision. My responsibilities included code reviews and deployment support. Fanverse exemplifies the synergy of user-centric design and decentralized technology, balancing complexity with accessibility in Web3 applications.
Tech Stack: Web3Auth, Torus Wallet, ERC-1155, React, Node.js, MySQL, Redis, Docker.
Risely
As Full-Stack Developer and Service Architect at Risely, an end-to-end fintech platform, I architected and built scalable microservices (user, KYC, admin, wallet) on Amazon EKS, integrating traditional finance with decentralized infrastructure for loan issuance, asset management (crypto/fiat), KYC, and digital banking (cards, wallets).
I implemented gRPC for secure microservice communication and developed a Rust-based system for enhanced private key security via shard generation and threshold cryptography. Performance and reliability were ensured through Redis caching, AWS ElasticSearch for logging/monitoring, and Google Cloud Storage for data. The MERN stack powered the user interface, and Docker containerization provided modularity and consistent deployment.
Collaborating closely with DevOps and blockchain teams, I focused on seamless deployment and system resilience. Agile practices, including sprint planning and demos, along with clear documentation, facilitated alignment across teams. Risely demonstrates the convergence of CeFi and DeFi, delivering a secure and modern digital banking experience.
Tech Stack: MERN Stack, Redis, GRPC, Rust, Amazon EKS, AWS ElasticSearch, Google Cloud Storage, Docker.
Spozz Club
As the lead Blockchain Developer for Spozz Club, an NFT tokenization platform, I spearheaded its end-to-end development, building a system around the ERC-721 standard with a factory-based smart contract architecture. This enabled users to easily register, create custom NFT collections, and mint multiple NFTs with project-specific upload limits. Each collection was deployed as an independent ERC-721 contract on Ethereum, BSC, or Polygon via batch processing.
I utilized Hardhat for smart contract development and testing, with Infura as the RPC provider. IPFS ensured decentralized and secure NFT metadata storage. A key feature I implemented was CSV integration for efficient bulk NFT attribute uploads. The frontend integrated MetaMask, WalletConnect, and Coinbase Wallet for broad user accessibility.
Taking full ownership, my responsibilities spanned system architecture, smart contract deployment, and wallet/metadata integration. Spozz Club demonstrates a scalable, decentralized NFT infrastructure empowering users with control and seamless digital asset creation.
Tech Stack: ERC-721, Hardhat, Infura, IPFS, WalletConnect, MetaMask, Coinbase Wallet, CSV Integration, Redis, Rabbitmq, API Gateway, Microservices.
Frontend
Others
Full-Cycle Web Development — From MVP to Scale
End-to-end development services tailored for MVPs, dashboards, dApps, and SaaS — built with precision, delivered with speed.
Startup MVP Launch
Quickly turn your idea into a working MVP with clean architecture, modern tech, and fast delivery.
Web3 App Integration
Seamlessly connect wallets, smart contracts, and on-chain features into any frontend or backend system.
Custom Admin Dashboards
Build powerful, user-friendly internal tools for data, users, and analytics—tailored to your operations.
Product Architecture & Planning
Lay the groundwork with a future-proof tech stack, modular design, and scalable backend structure.
Smart Contract Audit & Optimization
Detect bugs, minimize gas usage, and ensure security before deployment—ideal for NFTs, DeFi, and DAOs.
Performance Fix & Refactor
Refactor bloated or slow apps, optimize database/API layers, and reduce frontend load times.
CI/CD & Deployment Setup
Set up automated deployment flows using Docker, GitHub Actions, and Vercel for smoother rollouts.
Team Collaboration & Handoff
Jump into ongoing projects or teams with clean, modular code and thorough documentation for seamless handoff.
Ready to take the first step? I’m here to help start-to-finish.
Whether you’re starting with a rough idea or a full feature list, I’ll help you plan, build, and launch your product with clean code, scalable architecture, and clear communication every step of the way. I’m not just a developer — I’m a partner in building something meaningful, reliable, and future-ready.
Frequently Asked Questions
I work on everything from MVPs and admin dashboards to full-scale Web3 platforms and smart contract systems. Whether you need a fast prototype or a production-ready app, I’ve got you covered.
Both. I love helping solo founders bring ideas to life just as much as I enjoy jumping into larger teams to help scale or add Web3 features.
As a full-stack dev, I use React, Next.js, Node.js, MongoDB, and PostgreSQL. For blockchain projects, I work with Solidity, Hardhat, and Ethers.js. I also use Docker, GitHub Actions, Vercel, and AWS for CI/CD and deployment.
Yes. I can review and refactor your codebase, improve app speed, clean up performance issues, and make everything run more efficiently.
Let’s Turn Your Vision Into a Scalable Application.
- Mr. Harmeet Singh
- +91-9501401193
- Contact@harmeet.io