Filip M.

Seasoned Java/Full-Stack Developer with 14 years of experience, specializing in diverse industries such as hospitality, air and water quality monitoring, sports betting, casinos, fintech, and medicine. My expertise spans multiple technologies including Java, Kotlin, Go, JavaScript, TypeScript, Spring Boot, PostgreSQL, MySQL, MongoDB, Node.js, Express.js, Nest.js, Next.js, React, Angular, and Vue. I hold a Master's degree in Computer Science. Throughout my career, I have provided the following services: ?️ Backend Development ? Frontend Development ?️ Web Development ?️ System Architecture ? Database Design & Modeling ? API Development & Integration ? IoT Backend Development ? AI Development & Integration ? Blockchain, DeFi, DApp, NFT ☁️ Cloud Engineering I have collaborated with global banking institutions, game development companies, startups, and several Fortune 500 clients across various sectors: ? Health Care ? Air and Water Quality Monitoring ? Sports Betting ? Casinos ? Fintech & Banking ? Medicine ? Hospitality I specialize in building secure and scalable blockchain solutions using Solidity, Ethereum, Polygon, Binance Smart Chain, and other EVM-compatible chains. I’ve delivered projects in DeFi, NFT marketplaces, DAOs, staking platforms, token development (ERC20, ERC721, ERC1155), and crypto payment gateways. I have deep knowledge of tokenomics, gas optimization, contract auditing, and full-stack dApps using React, Next.js, Node.js, and Web3.js/Ethers.js. I ensure all contracts are secure, upgradeable, and fully tested using tools like Hardhat, Truffle, and Foundry. I follow best practices in smart contract development with CI/CD, Git, and test-driven workflows. Whether you need a fully-featured dApp, NFT minting engine, DeFi protocol, or blockchain integration into existing systems, I’m here to deliver high-quality, production-ready code. As a Spring Boot expert, I have developed numerous robust backend systems, showcasing my ability to integrate complex server functionalities seamlessly. Here’s a snapshot of the tech stacks I've mastered: - Languages: Java, JavaScript, TypeScript - Frameworks: Spring Boot, React, Vue.js, Angular - Blockchain Development: Ethereum, Solana, Smart Contracts, Solidity, Rust, MemeCoins, Trading Strategies - Web Development: - Frontend: HTML5, CSS3, React, Vue, Angular - Backend: Spring Boot, Node.js, Express.js - Database Management: MySQL, PostgreSQL, MongoDB - DevOps and Collaboration Tools: Git, Docker, Jenkins, AWS, Azure - Software Testing: JUnit, Mockito, Selenium, Jest - Additional Skills: RESTful APIs, microservices architecture, Agile methodologies, DevOps practices My career is a testament to my dedication to continuous learning and embracing new challenges. I am enthusiastic about further enhancing my technical skills and am always prepared for the next technological advancements in the software development industry.