10/12/2025 updated

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Front-end Developer, Full-stack Engineer

La roche sur yon, France Bachelor’s degree of computer science in Hanoi University
La roche sur yon, France Bachelor’s degree of computer science in Hanoi University

Profile attachments

Melvin.pdf

About me

As an innovative and passionate Full Stack Developer, he has extensive experience delivering scalable, high-performance web and mobile applications across sectors including healthtech, SaaS, and crypto. I particularly enjoy working with client-side like React, React Native, Angular, and Vue.

HTMLJavaScript (Programming Language)PHP (Programming Language)Application Programming Interfaces (APIs)Amazon Web ServicesConfluenceJIRABootstrap (Software)Cascading Style Sheets (CSS)Software QualityDatabasesText EditingElasticsearchLaravelPostgreSQLVector GraphicsMongoDBMySQLNginxNode.JsSoftware ArchitectureBlockchainNext.jsRich Text FormatSQL DatabasesSubversionTypeScriptWebRTCWordPressFront End (Software Engineering)User ControlsTailwindReactJSPixel PerfectFirebaseBackendGitVue.jsSyntactically Awesome Style Sheets (SASS)AngularJSMaterial UICassandraSolidityFigmaNpm(Software)GraphqlWeb3.jsReact ReduxMochaServerless ComputingDockerMicroservices
AWS, Angular, API, APIs, backend, back-end, blockchain, Bootstrap, Css, SCSS, Cassandra, Confluence, database, docker, Elasticsearch, figma, Firebase, Git, GraphQL, Html, Jira, Javascript, Laravel, Material UI, Microservices, micro services, Mocha, MongoDB, MySQL, Next.js, nginx, Node.js, NPM, PHP, pixel-perfect, Postgresql, Redux, React, rich text, SQL, serverless, software architecture, code quality, Solidity, Subversion, SVN, SASS, Tailwind CSS, text editing, TypeScript, user controls, vector graphics, Vue, web3.js, Web3, WebRTC, Wordpress

Languages

EnglishNative speaker

Project history

Full-stack Developer

CarersHQ
  1. Led a full refactor and modernization of an aging React Native application, migrating code to a modular, scalable architecture using Expo SDK 50+, TypeScript, and React Native for consistent UI/UX across platforms.
  2. Implement native OS authentication methods (Touch ID, Face ID) using Expo Local Authentication and native modules for secure and seamless user access.
  3. Architected and delivered robust care management features including:
  4. Timesheet generation & validation, with real-time logging and digital signatures.
  5. Task scheduling and calendar sync (integrated with Google Calendar API).
  6. In-app communication module with real-time messaging, audio/video calls via WebRTC, and push notifications using Firebase Cloud Messaging (FCM).
  7. Location tracking & routing with Google Maps SDK and geofencing for monitoring caregiver visits.
  8. Developed scalable RESTful APIs and GraphQL endpoints using NestJS, TypeORM, PostgreSQL, and Redis for caching real-time location and chat sessions.
  9. Implemented microservices architecture using Docker and Kubernetes for scalable backend deployments and service isolation.
  10. Created a responsive Admin Dashboard (React + Chakra UI) for managing users, carers, care logs, compliance, payments, and analytics.
  11. Integrated Stripe for secure payments, earnings tracking, and subscription management.
  12. Setup and maintained CI/CD pipelines using GitHub Actions and deployed it using Docker, AWS Fargate, and S3/CloudFront for frontend hosting.

Front-end Developer

Miidas
  1. Created frontend using UX design in a pixel-perfect and user friendly way.
  2. Created frontend to integrate Live video conferencing & collaboration function using WebRTC.
  3. Developed a blockchain-based NFT marketplace platform using React, Redux Toolkit, Material-UI, Storybook, and Web3.js.
  4. Introduced an atomic design with descriptive documentation using Storybook and configured its UI library and design system on the top of Material-UI using all the reusable components like atoms, molecules, and organisms.
  5. Built a user-friendly filtering functionality and boosted the code quality and performance significantly.
  6. Created several muti-chart like Line chart, Bar Chart, Pie Chart and Bubble Chart within backend APIs integration.
  7. Created test cases for frontend using Jest.
  8. Integrated ChatGPT api in user QA page.
  9. Created a React Native mobile application, integrating Auth0 for authentication, Firebase Cloud Messaging (FCM) for push notifications, and various third-party APIs to enhance functionality and user experience.
Tech Stack: React, Redux, Next.js, Storybook,TypeScript, Tailwind CSS, Material-UI, WebRTC, Web3.js, Webpack, CanvasJS Chart, Node.js, ChatGPT, Jest, React Native, Firebase

Full-stack Engineer

Wee Bee Kids Inc
  1. Created frontend using figma design for mobile responsiveness.
  2. Led the development of a unified rich text editor that runs on mobile, desktop, and web for users.
  3. Developed a JavaScript-based image annotation app that runs on desktop and web, it also allows for re-editable PNGs/JPGs by storing vector annotation data in the image binary.
  4. Created a feature to present Angular-based pages in a full-screen auto-generated presentation with advanced user controls and layout options.
  5. Integrated a build pipelines of 5+ complex applications to reliably use common rich-text editing component.
  6. Developed a custom vector graphics library for use in annotating both bitmaps and PDFs.
  7. Implemented Microservices using a serverless framework.
  8. Developed a React Native mobile application and implemented a real-time messaging feature using WebSockets, ensuring seamless and instant communication between users.
Tech Stack: Angular, NgRx, Rx.js, EJ2, Tailwind CSS, PHP, MySQL, React Native, GraphQL

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