NEERAJ SINGH

Full-Stack Developer · Web3 · AI/LLM

ekaneeraj@gmail.com · Remote · Worldwide

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Software Engineer with 4+ years building production-grade web, Web3, and AI/LLM applications, from modern frontend and backend systems to smart contracts, blockchain integrations, and AI-powered solutions.

Experience

Freelance Software Developer

Independent

Mar 2026 – Present

Remote

  • Building full-stack, Web3, and AI/LLM applications end-to-end, including backend APIs and integrations.
Next.jsTypeScriptNestJSAI/LLMWeb3

Software Developer

Web3Citadel

Mar 2022 – Mar 2026

Remote

  • Owned development across multiple production applications, including multi-tenant SaaS with auth, subscriptions, scheduling, dashboards, analytics, and Stripe/Razorpay payments.
  • Designed and integrated smart contracts and Web3 applications across EVM chains and Solana — including trading, launchpads, NFTs, tokens, staking, swaps, and DeFi.
Next.jsReactTypeScriptNestJSPostgreSQLRedisSurrealDBSolidityFoundryDockerAWS

MERN Stack Intern

Neuro Education Research Institute

Sep 2021 – Nov 2021

Remote

  • Built features for an online language-learning platform (MERN).
MongoDBExpressReactNode.js

React.js Intern

Skynox Tech Pvt. Ltd.

Apr 2020 – Jun 2020

Remote

  • Developed responsive web interfaces and app features with React.js.
React.js

Selected Projects

NFT Marketplace

Web3

Full-stack NFT marketplace with minting, listings, trading, wallet connectivity, and blockchain transactions.

Next.jsNestJSPostgreSQLSolidityViemEVM

Legal Document AI — RAG Application

AI / LLM

Processes legal PDFs, generates embeddings into a vector database, and enables natural-language Q&A over documents.

LangChainLLMEmbeddingsVector Database

Reflection Token

DeFi

Token smart contract with swap and automated liquidity.

Next.jsViemSolidityEVM