👋 Welcome to My Portfolio

🏠 Home

Senior Blockchain Engineer with 10+ years in software development and 7+ years specialising in EVM and multi-chain systems. I own the full Web3 lifecycle — smart contracts, deterministic indexing (Subsquid/The Graph), and high-performance backend APIs. Currently building production-grade L2 infrastructure at Shiba Inu (Shibarium), with a track record spanning 10+ blockchain projects across DeFi, NFTs, DeSci, and enterprise domains. Passionate about software development, teaching, and public speaking.

• Smart Contract Development
• Deterministic Indexing & Data Pipelines
• Backend APIs (Node.js, GraphQL, REST)
• Cross-chain Interoperability
• DeFi, NFTs & DeSci
• Blockchain Architecture

👨‍💻 About Me

Professional Experience

• Senior Smart Contract, Web3 Backend & Indexing Engineer at Shiba Inu (Apr 2024 – Present)

  • Own end-to-end data pipelines: smart contracts → Subsquid indexers → Node.js/GraphQL APIs powering Shibarium ecosystem tools
  • Architected Subsquid indexers syncing millions of L2 blocks with deterministic event modelling, handling finality, reorgs, and RPC inconsistencies
  • Led smart contract development for ShifuAirdrop Proxy - Implementation
  • Implemented cross-chain token standards using Chainlink CCIP
  • Developed Central Authentication Service SDK cas-sdk
  • Built smart contracts for On Chain Gaming Registry game-registry
  • Developed cross-chain swap contracts using CCIP and Li.Fi crosschain-shibaswap
  • Developed, implemented & deployed Shib Newsletter Cover V2 NFT contracts Proxy - Implementation

• Senior Software Engineer (Blockchain) at V2Soft (May 2021 – Feb 2024)

  • Translated client requirements into production Solidity smart contracts; architected comprehensive blockchain solutions
  • Designed, developed, and deployed the V2Soft 25th Anniversary NFT system end-to-end — Solidity contracts, Node.js APIs, MySQL, AWS
  • Built the Vehicle NFT platform storing vehicle lifecycle data on-chain via ERC-721 with IPFS metadata
  • Ensured transaction atomicity from submission to block inclusion across all on-chain operations
  • Developed PoCs and actively contributed to the Blockchain Innovation Team; trained newcomers on Solidity and blockchain

• Senior Blockchain & Backend Engineer — Self Employed / Freelance (Dec 2019 – Apr 2021)

  • Designed & deployed production smart contracts for staking, rewards, vesting, ERC20/721, and full token ecosystems
  • Built the EarnTV Reward Engine — ERC-20 issuance, staking, NFTs, and Gnosis MultiSig wallet integration
  • Developed smart contracts for OpenTherapeutics (Decentralised Science) — researcher rewards, funding, and collaboration
  • Led backend & blockchain development at Humation Limited (Junior Team Lead) — cross-chain interoperability across Ethereum, TRON, Waves, and Stellar

• Senior Software Engineer at Harbinger Systems (Jan 2017 – Dec 2019)

  • Specialised in Solidity and Truffle Framework; created private blockchain networks with diverse consensus algorithms
  • Developed Certificate of Authenticity — ERC-721 NFT platform for artwork provenance with IPFS and React.js front-end
  • Forked ARK blockchain to create Blockpool — analysed architecture, proposed changes, and implemented the fork
  • Created Loan Lending App and Land Records DApps; achieved 100% smart contract test coverage via TDD
  • Established blockchain nodes on AWS; deployed contracts across Ganache, private networks, testnets, and mainnet

• Associate Software Engineer at AtoS India Pvt. Ltd (May 2014 – Jul 2015)

  • Monitored production servers, scheduled batch jobs, tested endpoints, and conducted root-cause analysis of incidents

Skills & Expertise

🎓 Education

• M.Sc. in Scientific Computing — Savitribai Phule Pune University (CGPA: 8.6/10, Grade A+) | Jul 2015 – Apr 2017
• B.Sc. in Computer Science — Nowrosjee Wadia College (CGPA: 6.8/10, Grade A) | Jul 2011 – May 2014

📜 Certifications

• Consensys Blockchain Developer Bootcamp — Scholar Recipient
• IAAA Certified Ethereum Blockchain Developer and Professional
• Arc Certified Remote Developer — Arc
• Intensive Certificate in German Language — Savitribai Phule Pune University

🚀 Projects

Enterprise Projects

OpenTherapeutics (DeSci)

• Decentralised science platform for researcher funding, rewards, and collaboration
• Migrated contracts from Ethereum to Polygon
• Advanced security measures with MultiSig wallet
• View Contract

EarnTV

• ERC-20 reward engine with staking, NFTs, and Gnosis MultiSig wallet integration
• NFT-based subscription system
• Secure token economics
• View Contract

Shibarium Indexing & Data Pipelines

• Subsquid indexers for staking, rewards, token transfers, validator ops, and custom Shibarium L2 logic
• Deterministic event modelling syncing millions of L2 blocks

V2Soft 25th Anniversary NFT

• End-to-end NFT issuance: Solidity contracts, Node.js APIs, MySQL, AWS

Vehicle NFT

• On-chain vehicle lifecycle tracking via ERC-721 with IPFS metadata storage

Personal Projects

• Treasury Smart Contract: View Code
• Solhub Token Ecosystem: View Code
• FAVE ERC-20 Token: View Code
• Staking Contract: View Code

📝 Blog

Latest Articles

Medium

• How to estimate gas for a blockchain transaction?
• Understanding Cross-chain Interoperability
• Smart Contract Security Best Practices

LinkedIn

• How OpensSea works with any ERC721 contract?
• Get All ERC721 Tokens Owned By An Account
• Scaffold-ETH: Debug Contracts Tab

📫 Contact

📊 GitHub Stats

---

_{Built with ❤️ by Balaji Pachai}