I have been building software products for over 9 years, creating scalable platforms across fintech, blockchain, healthcare, and SaaS environments. Much of my recent work has focused on Web3 and digital asset platforms, where I have helped design and build blockchain ecosystems, wallet infrastructure, token issuance systems, and exchange style trading platforms. I have also developed blockchain explorers, smart contract integrations, and token distribution platforms that support real world crypto products and high volume transaction environments.
My strength is combining strong engineering fundamentals with deep knowledge of blockchain systems and modern web technologies. I focus on building secure, scalable platforms that connect traditional web applications with decentralized infrastructure. I have led projects from architecture through production, designing transaction engines, wallet authorization systems, and cross network asset bridges while working closely with product teams and other engineers to deliver reliable digital asset services.
Now I am focused on building the next generation of Web3 platforms that combine blockchain, AI, and modern cloud infrastructure. I enjoy working on products that require strong system design and real world impact, especially in areas like decentralized finance, digital asset infrastructure, and intelligent platforms that help shape the future of the crypto ecosystem.
Experience: 9 years
Yearly salary: $80,000
Hourly rate: $50
Nationality: 🇻🇳 Vietnam
Residency: 🇩🇰 Denmark
Experience
Senior Full Stack Engineer
DIFINES 2024 - 2026
• Led architecture and development of the DFS Chain ecosystem, a Web-based Layer-0 blockchain platform implementing a centralized ledger and transaction engine simulating decentralized infrastructure for wallets, exchanges, token issuance, launchpads, and digital asset services. • Designed and implemented DFS Scan, a blockchain explorer comparable to Etherscan/BscScan, delivering real-time block aggregation, transaction indexing pipelines, and optimized analytics for large-scale ledger inspection. • Engineered MetaFace Wallet, a MetaMask-style digital asset wallet supporting DFS-native and bridged Web3 assets, implementing wallet abstraction, transaction execution workflows, and secure authorization across ecosystem applications. • Developed Quick IDO, a hybrid exchange and launchpad supporting Web3↔Web3, Web2↔Web2, and Web3↔DFS asset bridging, including custody handling, liquidity settlement, and cross-ledger deposit/withdrawal pipelines. • Built Moegi IDO platform enabling project onboarding, whitelist validation, vesting configuration, and automated token distribution integrated with shared ledger infrastructure. • Implemented DFS WhiteCreator, enabling no-code token issuance with configurable supply models, ownership governance, and ecosystem-wide integration with wallet and exchange services. • Architected WEX, an AMM-style trading platform similar to PancakeSwap implementing swap routing, pricing algorithms, liquidity accounting, and centralized settlement backed by ledger state management. • Developed Uhalisi, a ledger-backed digital content registration system providing timestamped ownership verification and immutable metadata validation. • Built POIPI, a token airdrop and campaign orchestration platform implementing automated reward distribution and wallet-based participation tracking. • Designed Burn-to-Earn economic mechanisms, integrating token burn tracking, emission modeling, and automated reward distribution within DFS tokenomics. • Architected shared ledger and transaction infrastructure including block simulation, confirmation handling, wallet synchronization, and cross-application interoperability. • Implemented cross-ledger asset bridges integrating external Web3 networks via blockchain event monitoring, asset mint/burn mapping, and secure settlement workflows. • Integrated AI-assisted analytics and operational automation to monitor transaction behavior, improve ecosystem insights, and support intelligent platform management workflows. • Leveraged LLM-assisted engineering workflows to accelerate development, automate debugging/testing processes, and improve delivery efficiency across distributed services. • Optimized backend services, database schemas, and caching strategies supporting high-throughput financial operations across interconnected DApps.
Back End | Smart Contract Developer
Decent Reviews 2023 - 2023
• Crafted a user review API and automated review aggregation engine using Node.js, TypeScript, and Express.js, improving data collection efficiency by 50% for the customer support team. • Established a badge generation engine, resulting in a 25% increase in user-generated content shared across social media, improving brand visibility and engagement. • Integrated Ethereum smart contracts via Web3.js enabling automated verification workflows and reducing manual operations by 60%. • Implemented CI/CD pipelines using GitHub Actions improving deployment reliability and reducing release failures. • Generated detailed API documentation with Swagger and conducted thorough API testing using Cypress and Jest, boosting developer onboarding by 40% and increasing system uptime by 15%. • Containerized backend services with Docker, reducing database response times below 200ms.
Back End Engineer
XMRPlay Ltd 2023 - 2024
• Engineered scalable backend infrastructure using Node.js, TypeScript, Express.js, and MongoDB supporting 5M+ daily transactions with 99.9% uptime. • Designed real-time communication and gaming interaction systems using Socket.io, improving user engagement and retention by 30%. • Developed AI-assisted payment processing and fraud detection workflows, improving transaction speed by 50% while strengthening platform security. • Implemented secure authentication architecture using JWT, CAPTCHA, and session orchestration reducing unauthorized access by 40%. • Built affiliate and referral systems increasing traffic by 40% and driving measurable revenue growth. • Designed customer ticketing workflows reducing average response time from 48h to 12h.
Blockchain Full Stack Engineer
World Speed 2021 - 2023
• Spearheaded the creation of a comprehensive DeFi ecosystem, token generation and ICO platforms, 5 play-to-earn games, 2 NFT marketplaces, and 10+ Web3 projects. • Developed an auto DEX bot for Burn&Drop that executed trades in under 2 seconds, increasing transaction efficiency by 40% and enhancing user engagement across the platform for over 1,000 active users. • Designed a series of robust token bridges that facilitated seamless asset transfers across five different blockchain networks, enhancing transaction efficiency and improving cross-chain communication by 40% within the first quarter of implementation. • Automated the integration process between React.js front-end and smart contracts using Web3.js and Ethers.js; streamlined deployment time by 60%, allowing quicker updates and feature rollouts for end-users. • Built a robust internal back-end system by synchronizing with a blockchain database using Node.js and Express.js; improved data retrieval speed by 40% while enhancing security measures across the platform. • Reconstructed existing API endpoints to utilize GraphQL, providing a more flexible data querying mechanism; this effort yielded a 50% reduction in code complexity, improving maintainability across the development team. • Managed CI/CD processes for the development team, utilizing CircleCI, Bitbucket, GitHub, and AWS Lambda functions; achieved a 40% reduction in deployment time and improved overall software quality.
Blockchain Developer
Defichain 2020 - 2021
• Developed and deployed smart contracts supporting liquidity pools and yield farming strategies on Binance Smart Chain. • Achieved full automated testing coverage using Truffle and Hardhat frameworks. • Built Web3 interfaces improving staking and liquidity onboarding workflows.
Full Stack Developer
Liva Healthcare 2019 - 2020
• Contributed to the architecture and development of a configurable cloud-native digital health platform enabling end-to-end care program management, patient engagement, and real-time health data monitoring. • Designed and implemented scalable backend services using Node.js, Express, and MongoDB to securely ingest, process, and serve high-volume patient data from mobile applications, connected health devices, and third-party healthcare integrations. • Developed advanced analytics dashboards and coach management portals using React.js and D3.js, improving clinical visibility into patient progress, treatment outcomes, and operational performance. • Implemented real-time data processing pipelines and monitoring workflows to enable proactive interventions, personalized patient feedback, and measurable outcome tracking across healthcare programs. • Integrated wearable devices and remote monitoring systems through secure API architectures to enhance automated health tracking and support personalized care delivery. • Partnered closely with clinicians, product stakeholders, and DevOps teams to deliver highly available, secure, and performance-optimized healthcare solutions aligned with enterprise reliability standards. • Enhanced platform scalability and operational resilience through microservices architecture, distributed caching strategies, and observability tooling, supporting expanding patient populations and increasing data workloads.
Front End Developer
Adapt Agency 2017 - 2019
• Developed and maintained large-scale web applications using React.js, TypeScript, HTML5, and CSS3, delivering reusable and maintainable UI component architectures. • Built over 100+ production-grade UI components following modern frontend patterns, improving development scalability and consistency across applications. • Collaborated within Agile teams to translate product and design requirements into performant frontend implementations, accelerating feature delivery timelines by approximately 25%. • Led frontend debugging and stabilization efforts, resolving 300+ production issues across application lifecycle stages and improving platform reliability. • Implemented responsive layouts and cross-browser compatible interfaces ensuring consistent user experience across desktop and mobile environments. • Participated in continuous integration workflows, application testing, and release cycles to maintain production stability.
Skills
ai
angular
bitcoin
blockchain
blockchain-engineer
crypto
cryptography
defi
education
ethereumjs
firebase
front-end
full-stack
laravel
medical
nextjs
nft
node
php
postgres
python
react
react-native
rust
serverless
smart-contract
solana
solidity
tailwind
typescript
vue
web3js