01
Backend systems
REST and event-driven services in Node.js and Go, optimized for the load they actually see — not the load slide-decks predict.
- Node.js
- Express
- Go
- REST
- WebSockets
- gRPC
Available for opportunities
I build software
that survives
production.
I'm Mayank Yadav— a backend & Web3 engineer with 1.5+ years building scalable APIs in Go and Node.js, and gasless Web3 infrastructure with EIP-4337 account abstraction.
100k+
Users served
99%
Uptime held
600+
LeetCode solved
1.5+ yrs
Production work
GoTypeScriptJavaScriptSolidityJavaC++CSQLNode.jsExpress.jsREST APIsWebSocketsRabbitMQgRPCEvent-driven systemsHardhatFoundryEIP-4337EIP-712Permit2ZeroDevLayerZeroArbitrumAccount AbstractionMongoDBPostgreSQLFirebase FirestoreReact.jsNext.jsTailwindCSSLinuxVPS DeploymentPM2DockerGitGitHubPostmanIPFS
01About
Backend, by way of Web3.
I'm a backend engineer who treats Web3 like the infrastructure problem it actually is. Message queues, event-driven Go services, consensus simulators, IPFS pinning— that's the work I'm proudest of, even when smart contracts get the headlines.
Across two production roles I've scaled REST APIs to 100,000+ users, kept 99% uptime on bare-metal Linux VPS, and held 85%+ test coverage across Go protocol modules. On the Web3 side I work with EIP-4337 account abstraction, custom paymasters and bundlers, EIP-712 / Permit2 signature flows, and cross-chain relayers via LayerZero.
Currently building blockchain-simulator and cross-chain relayer infra at Ancilar. Previously shipped Yuva Portal's production stack at Young Indians.
Download résumé02What I work on
Six things I do well.
The work below is what fills my days — and the parts of the stack I'd want to be hired for.
02
Smart contracts
Solidity with the discipline of a backend engineer — typed interfaces, fuzz tests, gas auditing, and deployment scripts that don't end careers.
- Solidity
- Hardhat
- Foundry
- EIP-712
- Permit2
03
Account abstraction
End-to-end ERC-4337 stacks: paymasters, bundlers, session keys, and the boring infra that makes gasless feel magical.
- EIP-4337
- ZeroDev
- Paymaster
- Bundler
- Session keys
04
Cross-chain infra
Go relayers backed by RabbitMQ and MongoDB, with LayerZero message tracking and IPFS pinning for batched on-chain delivery.
- Go
- RabbitMQ
- LayerZero
- MongoDB
- IPFS
05
Distributed systems
Consensus simulators, off-chain orchestration, and message-driven services that hold their shape under throughput.
- Go
- Consensus
- AMQP
- Event-driven
06
Frontend
React and Next.js with TypeScript and Tailwind — components built for the long haul, not the demo. (The site you're on is the proof.)
- React
- Next.js
- TypeScript
- Tailwind
03Selected projects
Production work, with users.
Five projects, three years, real systems. The first three are featured — each shipped to real users and survived load.
- 01Dec 2025Featured
FiduWork.
Hybrid Web2–Web3 freelance marketplace with on-chain milestone escrow.
- Full backend for job posting, freelancer onboarding, proposals, and contract lifecycle.
- Solidity escrow contracts handle milestone-based payouts without a trusted third party.
- JWT auth + role-based authz for distinct client / freelancer roles.
- Node.js
- Express
- MongoDB
- Solidity
- JWT
- 02Aug 2025Featured
HyperPNL.
Full-stack ERC-4337 smart account interface — gasless UserOps, batched txs, real-time status.
- ERC-4337 smart account UI with paymaster-sponsored UserOps, session keys, batch txs.
- Custom Node bundler/paymaster managing the full UserOperation lifecycle.
- WebSocket channel pushes pending/bundled/reverted UserOp status — zero client polling.
- Node.js
- React
- Solidity
- ERC-4337
- LayerZero
- WebSocket
- MongoDB
- 03May 2025Featured
SocialFi.
Gasless tipping platform with EIP-4337 paymaster and a Go relayer.
- Solidity suite — TipQueue, Treasury, BatchDistributor, StakingContract — on Arbitrum Sepolia.
- EIP-712 + Permit2 sig approvals; EIP-4337 with custom Paymaster + EntryPoint for full gas sponsorship.
- Production Go relayer with RabbitMQ AMQP consumers, MongoDB state, and IPFS/Pinata batch storage.
- Go
- Solidity
- RabbitMQ
- MongoDB
- ZeroDev
- Arbitrum
- 042023 – 24
Udyam Uplift.
Production web platform for CAXpert with Firebase auth and personality analysis.
- 10+ frontend & backend functionalities, deployed and live serving real users.
- Firebase auth with 6-digit OTP for hardened production logins.
- Personality analysis for 100+ users across 3 assessment parameters.
- Node.js
- React
- MongoDB
- Firebase
- TailwindCSS
- 052022 – 23
WasteConnect.
Multilingual web portal connecting farmers and industries for crop-residue trade.
- Podium finish at National Agro Hackathon 2023 (200+ teams).
- Multilingual support across 8 local languages with 700+ translated keywords.
- Backend data models for trade listings, user roles, and transaction records.
- Node.js
- React
- MongoDB
- Firebase
- TailwindCSS
04Experience
Where I've shipped.
Two roles. Real systems. Real users. Each bullet was something I owned end-to-end.
Ancilar
Indore, India
- System AnalystNov 2025 – Present
- Associate System AnalystAug 2024 – Nov 2025
- Built core execution-node logic for a blockchain simulator in Go, contributing 40% of consensus-node infra and supporting a test network processing 10,000+ simulated tx/day.
- Sustained an off-chain relayer in Go that cut cross-chain message-delivery latency by 45% in high-throughput conditions.
- Applied EIPs including EIP-4337 for account abstraction, validated across 1,500+ test deployments.
- Held 85%+ unit-test coverage across Go modules in collaboration with the protocol team.
Young Indians
Bhopal, India
- Full Stack Developer (Backend Focus)Nov 2022 – Mar 2024
- Architected Yuva Portal's RESTful API with 20+ endpoints in Node.js/Express.js — auth, authz, and aggregation for 100,000+ active users.
- Cut data-processing time by 30% via dual-database (MongoDB + relational) query refinement and indexing.
- Held 99% uptime on a Linux VPS with PM2, reverse-proxy, and env config (yuvaportal.youngindians.net).
- Shipped a unified React + Node + MongoDB platform with seamless API integration at scale.
05Recognition
Hackathons, ratings, podiums.
01
600+ LeetCode problems
Max contest rating 1850 — strong algorithmic problem-solving baseline.
02
5-star C++ on HackerRank
Top-percentile language proficiency rating.
03
National Agro Hackathon 2023 — Podium
WasteConnect finished on the podium among 200+ teams nationally.
04
Yellow Network Hackathon 2025 — IIT Delhi
Presented SocialFi gasless EIP-4337 relayer on Yellow SDK + Nitrolite state channels.
06Contact
Drop me a line.
Best for collaborations, role inquiries, and Web3 infra questions. I read every message.