Abdul Rehman Sohail

- Built Node.js backend services for Web3 applications, integrating with Ethereum, Polygon, and BNB Chain via ethers.js and web3.js. - Developed wallet authentication flows (MetaMask / WalletConnect) and NFT metadata APIs for decentralized applications (dApps). - Designed on-chain data indexing pipelines and DeFi protocol integrations on AWS infrastructure. - Led CI/CD pipelines via GitHub Actions and AWS CodePipeline; conducted code reviews and mentored junior developers.

- Built and maintained a clinic-facing portal enabling healthcare providers to order compounded medications for their patients, with role-based access for clinics, doctors, and pharmacy staff. - Integrated with DEA licensing systems and the Pharmatika portal to streamline onboarding of new clinics and licensed physicians across the US. - Implemented controlled substance e-signature workflows, allowing doctors to digitally sign prescriptions for controlled substance products in compliance with US regulations. - Integrated third-party identity and authentication provider Exostar for secure, compliant access management for medical professionals. - Built and managed shipping integrations with USPS, UPS, and FedEx to automate order fulfillment, tracking, and delivery notifications for patient medication shipments. - Designed scalable RESTful APIs on AWS to support portal operations, ensuring HIPAA-aligned data handling and high availability.

Cash Casino

January 2021

A fully on-chain blockchain casino on Arbitrum where users can place bets or act as the house by providing liquidity. Integrated smart contracts with Alchemy webhooks and The Graph for provably fair RNG-based game outcomes fetched from the blockchain.

TheCryptoBasic

January 2021

A comprehensive crypto market platform similar to CoinMarketCap, featuring live coin prices, volume changes, interactive charts, and portfolio management. Integrated with MetaMask for wallet connectivity and multiple exchanges including Binance, MEXC, Huobi, and Bybit.

Legion Network

January 2021

A Web3 wallet application enabling users to manage funds, connect to various payment methods, and earn LGX tokens through gamification and referral systems. Built on a microservices architecture with real-time transaction processing.

Hype

January 2021

A blockchain-powered freelance marketplace connecting KOLs and marketing agencies, similar to Upwork. Payments and work delivery are handled via smart contracts, ensuring fraud-proof, trustless transactions between parties.

Diet & Cheat App

January 2021

A mobile application connecting users with professional fitness and diet coaches. Coaches create personalised meal and fitness plans, track user progress, and set goals. The backend handles user-coach matching, plan delivery, scheduling, and real-time notifications.

VPI Compounding Pharmacy Portal

January 2021 - January 2025

A healthcare portal for a US-based compounding pharmacy, enabling clinics to order medications for patients. The system handled DEA license verification, controlled substance e-signatures for doctors, clinic and physician onboarding via Pharmatika, and automated medication shipments through USPS, UPS, and FedEx integrations.