Rakib M. Hossain — Backend & Web3 Developer

Backend & Web3 developer focused on Python and Node.js — building scalable APIs, blockchain systems, and smart contract integrations. Available for freelance work. Hire me on Fiverr

PythonNode.jsFastAPISolidityWeb3PostgreSQLRedisDockerTypeScriptReact

Selected Projects

Certificate in Web3

A production-grade blockchain certificate management system with FastAPI, Ethereum wallet authentication, Polygon smart contracts for immutable on-chain storage, Storj cloud uploads, and automated email delivery.

PythonFastAPIPolygonSolidityDocker

cTrip

A production-style crypto payment gateway with async workers, Redis queues, PostgreSQL storage, blockchain scanners, and webhook delivery, deployed via Docker.

PythonRedisPostgreSQLDockerWeb3

SafeTea Wallet

A minimal, gas-efficient multi-signature wallet with on-chain proposal and confirmation workflows for managing ETH and ERC20 assets across multiple owners.

SolidityFoundryReactWagmiEthereum

OmniToken

A production-grade LayerZero V2 cross-chain token bridge with verified contracts and a modern Web3 frontend.

SolidityLayerZeroReactTypeScript

LocalScan

A lightweight EVM blockchain indexer and explorer that runs entirely on your machine. Connect to any EVM-compatible node and start indexing blocks and transactions in real time into a local SQLite database.

PythonFastAPISQLiteweb3.py

Coffee Chain

Coffee Chain is a decentralized Ethereum platform where supporters tip creators with ETH and attach messages through transparent, secure smart contracts.

SolidityReactEthereumWagmi

MonoDEX

A decentralized exchange enabling trustless token swaps and liquidity management.

SolidityReactUniswap V2TypeScript

Work Experience

Backend & Web3Current

Freelance

2026 – Present

Backend & Web3 Engineer

SomPay

Evolucione

Freelance

Writing

Certificate in Web3 — Blockchain-Verified Certificate Management with FastAPI

How I built a production-grade certificate management system with FastAPI, Ethereum wallet auth, Polygon smart contracts for immutable on-chain hashing, Storj storage, and automated email delivery.

Jan 2025

SafeTea Wallet — Building a Minimal Multisig Wallet in Solidity

How I built SafeTea, a gas-efficient multi-signature wallet with on-chain proposal workflows, owner governance, and a React + Wagmi frontend.

Mar 2026

LocalScan — A Lightweight EVM Blockchain Indexer That Runs on Your Machine

A lightweight EVM blockchain indexer and explorer built with Python + FastAPI, designed for local development with Anvil, Hardhat, and any EVM node.

Fab 2026