I am an experienced Full Stack and Blockchain Developer with over 9 years of building innovative solutions that enhance project outcomes and functionality.

About

I am an experienced Full Stack and Blockchain Developer with over 9 years of building innovative solutions that enhance project outcomes and functionality. Skilled in blockchain technology, smart contract development, and full-stack engineering, I deliver high-quality results that optimize user experiences. I am proficient in modern programming languages and frameworks, with a strong ability to integrate advanced technologies for efficiency and seamless processes. Passionate about continuous learning and solving complex challenges in the blockchain space and full stack development, I am dedicated to contributing to groundbreaking projects that drive technological advancement.

Industry experience

  • Software & Internet
  • Financial Services
  • Gaming

Projects · 1

Smart contract development using Solidity & Rust for token & NFT development ERC20, ERC 721, ERC 1155, BEP20 ....... Defi, NFT minting & marketplace Staking Contract audit and unit test, harhat, truffle, version upgrading game development using smart contract and web3.

  • Blockchain Developer
  • Project Manager

Work experience· 4 roles

Blockchain Developer · FREYSOFTJan 2024 – Aug 2025 · 1 yr 8 mos

Designed, developed, and audited smart contracts for DeFi platforms, NFT marketplaces, and DAOs, ensuring secure, gas-efficient, and upgradeable architectures while maintaining full EVM compatibility. Deployed ERC-20 and ERC-721 token contracts handling transactions exceeding $5M+ in total volume and implemented automated liquidity pool mechanisms for a decentralized exchange (DEX). Optimized gas costs in Solidity smart contracts by implementing bitwise operations, storage packing, and function modifiers, reducing average gas fees by 40% on Ethereum mainnet. Integrated Chainlink oracles to enable real-time price feeds and data-driven smart contract executions, ensuring secure on-chain data verification for lending protocols. Engineered staking and rewards mechanisms allowing users to stake governance tokens in a decentralized voting system with APY adjustments based on network participation.

Freelance Blockchain & Full-Stack DeveloperJan 2024 – Present · 2 yrs 11 mos

Developed and deployed custom smart contracts for DeFi lending platforms, staking protocols, and NFT marketplaces, ensuring secure, gas-efficient, and scalable implementations. Conducted rigorous unit and integration testing using Hardhat and Chai to prevent security vulnerabilities. Built and launched a feature-rich NFT minting platform integrating IPFS for decentralized storage, ensuring metadata immutability and long-term accessibility. Implemented dynamic NFT metadata updates enabling artists to modify NFT attributes post-mint based on predefined logic. Conducted smart contract security audits to identify and mitigate reentrancy attacks, integer overflows, and access control vulnerabilities, resulting in a 40% reduction in potential exploits before deployment. Developed and integrated multi-chain interoperability solutions enabling seamless asset transfers between Ethereum, BNB Chain, and Polygon. Utilized Layer 2 scaling solutions (Optimistic Rollups, zk-Rollups) to optimize trans

Senior Full Stack Developer · Sigma Software GroupJan 2020 – Aug 2025 · 5 yrs 8 mos

Led the end-to-end development of a high-traffic web application serving over 1M users, optimizing frontend performance with Next.js server-side rendering (SSR) and reducing page load times by 50%. Architected and implemented scalable microservices infrastructure, migrating from a monolithic system to containerized Node.js services on AWS ECS, improving system reliability and reducing downtime by 40%. Optimized PostgreSQL database queries using indexing and partitioning techniques, improving read/write efficiency by 30% and reducing query execution time from 200ms to 50ms. Designed and developed GraphQL APIs, reducing frontend-over-fetching issues and decreasing API response times by 35%, enhancing overall user experience. Built and maintained CI/CD pipelines using Docker, Kubernetes, and GitHub Actions, automating deployments and cutting release cycles from 2 weeks to just 3 days. Mentored a team of 5 junior developers, conducting code reviews and workshops on React best practices, Ty

Full Stack Developer · AccediaJan 2017 – Aug 2025 · 8 yrs 8 mos

Education

Bachelor's degree in Computer Science · Technical University of Denmark2009 – 2014

Testimonials · 5.0 from 1 review

Hire MICHAEL JOHN today

Post a job and invite MICHAEL, or contact them directly. No hidden commission.

Post a job