<Senior Full Stack /> From product interfaces to production backends.Specializing in NestJS architecture, Stripe payment flows, React products, and serverless automation.
// Welcome to my workspaceimport { Developer } from './universe'; const Portfolio = () => {return (<Developername="Nguyen Duy Thuan"role="Senior Full Stack Product Engineer"passion="Engineering Beyond Boundaries"/>);};whoami
Senior full-stack product engineer building TypeScript systems end to end: React and Next.js products, Capacitor mobile apps, NestJS backends, Stripe payment flows, and serverless automation.
cat mission.txt
Turning product requirements into reliable delivery across frontend, backend, mobile, payments, distributed systems, and production automation.
Led major backend contributions to a platform for user accounts, content, campaigns, subscriptions, and payments. Implemented contract-driven APIs, payment routing and webhooks, event streams, migrations, caching, and integration tests across its long production lifecycle.
Led frontend and mobile delivery for a shared product spanning responsive web and Capacitor applications. Built MobX presenter flows, localized Stripe checkout, visual regression coverage, and deferred deep links that resume after installation and authentication.
Contributed APIs and integration tests for issuing, collecting, donating, gifting, reserving, and transferring digital assets. Also built resilient Redis and Redlock recovery for safe coordination across service instances.
A queue-driven service reconciles payment, subscription, and mailing outcomes and publishes status updates. Contributed error handling and tests for subscription and protection flows, including fixes that prevent false operational alerts.
A serverless rendering service generates personalized certificates, campaign pages, images, and QR-enabled documents for delivery and storage. Contributed rendering actions, email workflows, object-storage backups, runtime upgrades, and integration tests.
Architected a service that extracts link metadata and page dimensions with HTTP, oEmbed, and headless-browser strategies. Packaged Chromium for serverless execution and added proxy support, URL sanitization, and browser-fingerprint defenses for difficult sites.
Implemented a commerce integration that calculates and issues post-purchase digital rewards. Built the checkout extension, reward settings UI, customer-history and tagging flows, API integration, and associated tests.
Developed an API and build pipeline for reusable, localized transactional-email templates. Implemented account, payment, donation, collection, subscription, and deep-link messages compiled and compressed before provider delivery.
An edge API validates email addresses and stores validation data through a hosted database client. Contributed versioned routing, cross-origin policy, request logging, error handling, and edge deployment configuration.
A Capacitor plugin exposes camera preview controls across web, iOS, and Android applications. Maintained its iOS implementation and package compatibility while preserving the typed TypeScript bridge and example application.
Authored broad acceptance and regression specifications for desktop and mobile product journeys. The suite combines Gherkin scenarios with database assertions and object-storage fixtures to verify behavior beyond the browser surface.
Contributed browser tests for web and mobile authentication journeys, including QR and email-confirmation paths. Reusable login and inbox helpers coordinate Playwright with mail APIs and message parsing.
A serverless runner receives visual-test configuration, captures selected page regions, and returns browser snapshots from the cloud. Its implementation packages headless Chromium and Puppeteer behind an HTTP-triggered function for parallel regression checks.
A Go service manages geospatial records and geometry-backed asset operations through HTTP APIs. It combines PostGIS persistence with Redis-backed coordination and ships as a containerized service with integration coverage.
Sole-authored a focused bilingual campaign experience with responsive carousel content, animated leaderboards, and live supporter presentation. Shipped the application through a serverless edge deployment pipeline.
Built a small backend gateway that starts assistant conversations and returns the latest generated message through an HTTP API. Added the NestJS service flow, tests, container packaging, and deployment configuration around the provider SDK.
A desktop product hosts modular operator tools and plugin-delivered interfaces. Built its configurable React administration dashboard with persistent layouts, custom widgets, responsive drag-and-resize behavior, and direct DOM updates that avoid re-rendering during pointer movement.
A desktop plugin catalogs local media, extracts metadata, removes duplicates, and organizes assets into projects and collections. Its Go pipeline and React interface provide scanning, filtering, map views, statistics, and detailed image and video inspection.
Built a plugin for operators to inspect users, activity, content, integrations, campaigns, and digital-asset transactions. Implemented the Rust bridge and React dashboard with sortable tables, metrics, persistent draggable widgets, and automatic synchronization.
A desktop plugin provides visual authoring, packaging, and testing for agent and event-driven workflows. Its Rust service and React node editor manage project metadata, imports, permissions, run controls, live status, and completion events.
Real Campaign — primarily frontend work on an email-marketing platform for creating, managing, scheduling, and sending email templates; modernized and maintained a combined React + AngularJS codebase. EarthToday / UON — full-stack ownership across React / Next.js / MobX web and Capacitor mobile apps, plus NestJS / TypeScript backends for Stripe payments, event-sourced services, Redis-backed services, and serverless automation.