chetansk

Architected a distributed, multi-chain blockchain indexing platform in Go that ingests 100K+ on-chain events/day with sub-2 s latency across EVM networks. Built and deployed a production Solidity contracts with storage layout optimization for gas efficiency and ABI encoding; implemented ethers.js-based backend integration to query contract state and execute on-chain transactions — covering the full lifecycle from contract design to off-chain consumption including L2 networks (Zora, Base) and Gold. Built the Farcaster Social Indexer, a distributed pipeline handling 5M+ events/day powering the $MOXIE Social Capital Score and enabling distribution of 2B+ tokens; end-to-end ownership from design to production monitoring. Collaborated with third-party security auditors to conduct comprehensive smart contract reviews; remediated vulnerabilities and hardened on-chain logic to ensure audit-clean multi-chain deployments across chains. Designed high-availability services with rate limiting, circuit breakers, and retry strategies across multi-chain infrastructure, sustaining >99.9 % uptime on Kubernetes (AWS/GCP). Wrote unit and integration tests using Hardhat and foundry prior to multi-chain deployment. Led 2–4 backend engineers: drove architecture decisions, code reviews, and engineering standards that increased delivery velocity 30–40 % and cut ramp-up time for new engineers from 5 weeks to ~2 weeks.

Responsible for building blockchain indexers for Ethereum-compatible chains while leading a team of four. Indexes block, transactions, and balances data. (https:/ /xscan.io/) Handling chain integrations and helping the company reach 1Mn in annualized revenue. Developed Price tracking service for ERC20 tokens using the data from multiple DEXs. Developed ERC20 Token details service to capture metadata like decimal, logo, symbol etc. (https:/ /docs.unmar shal.io/) Developed plan-based rate limiting and payments. Developed backend for Blockchain explorer which includes smart contract verification, NFT(inventory, holders and transactions), block details, tx details, latest blocks and txs

Replaced Redis with Azure Cosmos DB in the workforce management application backend using C#. Automated the product packing service using JenkinsPipeline, integrating build, test, regression, and deploy processes. Fostered a positive and collaborative work environment, promoting teamwork, knowledge sharing, and continuous learning among team members.

Developed a Diet planner application using the MEAN Stack (MongoDB, Express.js, Angular, and Node.js) and integrated Razorpay payment gateway, responsible for complete development. Enhanced the backend application to serve multiple clients using Node.js and MongoDB.

Developed a web app for controlling remote PacketScanHD hardware using Oracle DB for storage, .Net for the front end, and C# for the backend. Implemented features for monitoring call detail records, supporting new protocols, and developing backend functionalities. Added chart representations and implemented email and SMS sending with custom filters. Developed a CSV loader application in C# to extract and transform data from CSV files into an Oracle DB.