Backend · Web3 · Developer tooling

Atharv Chauhan

I build backend systems, on-chain apps, and the tooling that sits between them.

Right now I'm architecting the API layer for Kumele, a social meetup platform, and maintaining ClawRoute — an open-source proxy that cuts LLM API bills by 60–90%. I've been taking paid client work since January 2023, which is also when I started my B.Tech; the two have run in parallel ever since. Lately I've been building integration tooling for healthcare and finance: an MCP server over hospital FHIR data and a bank-statement-to-Tally reconciler.

Shipping while studying

B.Tech IT — ABES Engineering College
Fiverr — Freelance Web3 Developer
Contract.dev — QA Engineer
Kumele — Backend Developer
ClawRoute released

Solid = ongoing · Outlined = completed · Dashed = degree, graduating 2027

/work

Kumele

Backend Developer, freelance · Remote Jan 2026 — present
  • Architected and built 60+ RESTful APIs for a social meetup platform on NestJS, PostgreSQL and Redis.
  • Implemented layered authentication — JWT, Google OAuth, WebAuthn passkeys, TOTP 2FA — with role-based access control.
  • Built real-time event chat and push notifications on Socket.IO and Redis Pub/Sub.

NestJS · Node.js · TypeScript · PostgreSQL · Redis · Socket.IO

Fiverr

Freelance Web3 Developer · Remote Jan 2023 — present
  • Completed 10 client projects (about $3,000 billed) with a 4.8/5 average across 9 reviews, for clients in the US, Canada, Germany and Sweden; engagements of up to 9 weeks.
  • Built ERC-20 and ERC-721 token contracts, staking systems, and audited multi-token ICO launchpads on Ethereum, Polygon and Solana.
  • Built cross-chain swap platforms on LayerZero with a Wagmi v2 + Viem frontend, plus Chainlink integrations for EVM interoperability.

Solidity · Next.js · Wagmi · Viem · Ethers.js · LayerZero · Chainlink

Contract.dev

QA Engineer, part-time · Remote Nov 2025 — Jan 2026
  • Ran end-to-end testing on Web3 applications; found and documented security issues, race conditions and edge cases in DApp wallet flows and smart contract integrations.

Web3 testing · Smart contract integrations · DApp wallet flows

/projects

ClawRoute

Open-source LLM cost router · on npm Feb 2026
  • A local HTTP proxy that intercepts LLM requests, classifies task complexity with sub-5ms local heuristics, and routes simple work to cheap models and hard work to frontier models — 60–90% cost reduction, with automatic escalation on failure.

TypeScript · Node.js · Hono · SQLite · OpenAI / Anthropic / Gemini / DeepSeek APIs

All projects →

/stack

Languages
TypeScript · JavaScript · Solidity · Python · C/C++ · SQL
Backend & APIs
Node.js · NestJS · Express.js · Hono · Socket.IO · REST · Redis Pub/Sub · MCP
Frontend
React · Next.js · HTML/CSS · Wagmi · Viem · Ethers.js
Blockchain
Ethereum · Solana · Polygon · Kaspa · Avalanche · ERC-20/721 · LayerZero · Chainlink · Hardhat · Foundry
Databases
PostgreSQL · MongoDB · Redis · SQLite
Auth & security
JWT · OAuth2 · WebAuthn passkeys · TOTP 2FA · RBAC
Tools
Git/GitHub · GitHub Actions · Docker · Vitest · Zod · Vercel · Postman
Coursework
Data Structures & Algorithms · Operating Systems · Computer Organization & Architecture · DBMS · Computer Networks · Cloud Computing · Data Science · Machine Learning
B.Tech, Information TechnologyABES Engineering College, Ghaziabad (AKTU)
Senior SecondarySSMV, Shahjahanpur
SecondaryTakshashila Public School, Shahjahanpur

/contact

Open to backend, full-stack and Web3 engineering roles. The fastest way to reach me is email — I reply to everything.

atharvskeletons@gmail.com