Professional Summary
Versatile Fullstack Software Engineer with over 4 years of comprehensive software development experience, currently specializing in full-stack web development, AI/ML integration, and DevOps automation as a freelance developer. Strong background in mobile development (Flutter, React Native, Kotlin, SwiftUI) with 3.5+ years leading a mobile team of 8 developers. Proficient across the entire technology stack: React/Next.js on frontend, FastAPI, NestJS, Golang, Kotlin on backend, with expertise in AI/LLM integration (ChatGPT, Claude, Gemini APIs). Passionate about DevOps practices, CI/CD automation, and building custom tooling using multiple programming languages (Dart, Python, Bash, Rust, JavaScript, C/C++). Experienced in delivering SaaS applications, e-commerce platforms, AI-powered tools, internal dashboards, and API services. Additional experience in brand identity design for holistic product development.
Professional Experience
Fullstack Software Engineer (Freelance)
Independent Contractor | Oct 2024 - Present
Started part-time (evenings/weekends) alongside the AEGONA full-time role, then transitioned to full-time freelance after Oct 2025. Operating in early-stage environments, collaborating closely with founders to build and launch MVPs from scratch with high ownership and speed.
Key Projects & Deliverables:
- SportSeeker (AI & Mobile Desktop): Developed a Flutter Desktop application (macOS/Windows) for offline sports photo/video analysis. Integrated a Python FastAPI backend with an AI pipeline (InsightFace, PaddleOCR) for facial and BIB number recognition. Implemented modular packaging and cross-platform deployment.
- The Poet Residence (Quiet Luxury Web Platform + Brand Identity): Engineered the official website for The Poet Residence using React, TypeScript, Tailwind CSS and shadcn/ui, with a refined "Quiet Luxury" aesthetic. Also led the visual brand identity: extended the client-provided logo into additional variants, defined the color palette and typography system, illustrated a hero keyvisual plus two supporting keyvisuals, and produced a full brand guidelines book (Photoshop, Illustrator, InDesign). Now expanding into a shared-backend, multi-site platform for Phรบc Thanh An Group (CRM, booking, payments, resident services) across a monorepo of apps deployed on Vercel with Supabase and Cloudflare R2. Live at thepoetresidence.com.vn.
- Goal Card PRO (iOS Goal-Tracking App): Built and shipped a personal goal-tracking iOS app end-to-end โ Flutter codebase with native Swift bridging for notification categories/action handlers (Snooze, Check Goal) and APNs entitlements. Migrated static content to Firebase Firestore, integrated Firebase Cloud Messaging for push notifications. Owned the full App Store Connect submission pipeline, resolved two review rejections (Guideline 2.1, 2.3.3) with corrected demo evidence and Age Rating metadata, and debugged production-only push/notification-action bugs post-launch. Live at Goal Card PRO.
- Confidential Apartment Management App (Mobile UI/UX): Led the comprehensive UI/UX redesign of a Flutter-based enterprise app. Achieved a premium, high-density layout satisfying stakeholders' "no wasted space" requirement. Designed complex flows for billing, bulletin feeds with reactions, and fee comparison analytics.
- Nevio (AI Automation Agent): QA and requirements analysis for an n8n/LangChain-based conversational AI agent (OpenAI LLM, Postgres-backed memory) automating client outreach across email, SMS and CRM data sync. Diagnosed failing QA scenarios and proposed workflow/code fixes.
- Design and develop full-stack web applications using React/Next.js frontend and FastAPI/NestJS/Golang backends
- Build and deploy SaaS applications with scalable architectures, RESTful APIs, and database design
- Integrate AI/LLM capabilities (ChatGPT, Claude, Gemini APIs) into client applications for intelligent features
- Build API services and backend systems with comprehensive documentation and testing
- Implement DevOps practices: CI/CD pipelines, Docker containerization, cloud deployment (AWS)
Technologies: Frontend: Flutter (Desktop/Mobile), React, Next.js, Tailwind CSS, TypeScript · Backend: FastAPI (Python), NestJS (TypeScript), Golang, Supabase · Mobile (Native): Swift/iOS native bridging (UNUserNotificationCenter, APNs entitlements), Firebase (FCM, Firestore), App Store Connect · AI/ML: InsightFace, PaddleOCR, ChatGPT/Claude/Gemini APIs, Embeddings, Prompt Engineering · DevOps: Docker, AWS, GitHub Actions, Vercel · Database: PostgreSQL, MySQL, FAISS (Vector DB) · Design: Photoshop, Illustrator, InDesign, Brand Identity Design (logo systems, keyvisuals, brand guidelines)
Project Types:
- SaaS applications with subscription models and user management
- AI-powered chatbots and intelligent assistance tools
- E-commerce platforms with payment processing and inventory management
- Content management systems with custom workflows
- Internal business dashboards with analytics and reporting
- Microservices architectures and API development
Mobile Development Team Lead
AEGONA | Feb 2022 - Oct 2025
Led a mobile development team of 8 developers, overseeing architecture, code quality, and delivery of multiple cross-platform mobile applications.
Leadership & Management:
- Managed and mentored a team of 8 mobile developers, fostering technical growth and collaboration
- Established coding standards, conducted code reviews, and enforced best practices
- Coordinated sprint planning, task allocation, and delivery timelines for concurrent projects
- Successfully re-architected team's project structure, creating scalable, modular design
- Built custom automation tools and CLI utilities (Dart, Python, Bash) for team workflow optimization
Technical Achievements:
- Deployed 5+ mobile applications on iOS and Android platforms
- Integrated complex third-party services: payment gateways, authentication, location services, iBeacon, NFC
- Developed CI/CD automation that meaningfully cut deployment time across the team
- Implemented AI/LLM capabilities in mobile applications
- Created team-wide automation scripts that eliminated a substantial share of the team's repetitive manual work
Featured Projects
Highlighted Projects (Freelance 2024-2026)
Confidential Apartment Management AppNDA
Flutter
High-density premium UI redesign for an enterprise apartment management system. Integrated complex billing analytics and interactive community bulletins.
SportSeeker
Flutter Desktop, Python AI
Cross-platform desktop app for sports event management using offline AI facial/BIB recognition.
Goal Card PRO
Flutter, Swift (iOS Native), Firebase
Personal goal-tracking iOS app with alarm/reminder notifications. Built native Swift notification handling (categories, action buttons, APNs) alongside the Flutter codebase, migrated static content to Firestore, and owned the full App Store Connect submission and review-rejection resolution end-to-end.
Nevio
n8n, LangChain, OpenAI, PostgreSQL, Twilio, SendGrid
QA for a conversational AI automation agent built on n8n and LangChain (OpenAI LLM, Postgres-backed memory), handling client outreach across email, SMS and CRM data sync. Diagnosed a failing execution and fixed it through n8n configuration, proposing the solution to the team in meetings and demos.
Confidential Footwear E-commerce PlatformNDA
WordPress, WooCommerce
E-commerce website for a footwear retailer. WooCommerce storefront with integrated MoMo payment gateway.
Confidential Skincare E-commerce WebsiteNDA
WordPress, WooCommerce
E-commerce catalog site distributing European skincare brands. Product browsing funnels to Zalo/Facebook for consultation instead of online checkout.
Confidential Real Estate Listing WebsiteNDA
WordPress
Real estate listing website for the Bรฌnh Hฦฐng Hรฒa area, covering rentals, sales, and boarding rooms.
Legacy Multiplayer Game Server VPS MigrationNDA
Linux, VM Disk Image Analysis (qemu-nbd/libguestfs), Systems Migration
Migrated a legacy self-hosted multiplayer game server from a VM-based deployment to a native Linux VPS. Extracted and repackaged the core application layer directly from a VM disk image, bypassing the original virtualization dependency, and resolved legacy binary/library compatibility issues for a modern hosting environment.
ARLIX โ Personal AI Assistant OS
Rust, Flutter, Dart, Ollama, Claude API, Unix Socket/HTTP IPC
Ongoing personal project (since June 2026): a local-first, persistent AI daemon running 24/7, serving both a Rust TUI and Flutter GUI over Unix socket/HTTP. Includes a Codex CLI parity research program โ capturing and differentially analyzing OpenAI Codex's runtime behavior (streaming event protocol, session/thread lifecycle, tool-call semantics) against ARLIX's own implementation, backed by an evidence-based capability matrix and resource/memory profiling methodology.
Production Applications (AEGONA 2022-2024)
Confidential Civic Engagement PlatformNDA
Xamarin, C#
Multi-tenant SaaS civic engagement platform for local councils across Australia and New Zealand. Features include geo-tagged infrastructure incident reporting, push notification alerts, and community news feed. Contributed to iOS build pipeline and cross-platform deployment in a production enterprise environment. Available on iOS & Android.
Confidential Home Services Booking AppNDA
Flutter, Golang
Service-booking platform for home services. Advanced Google Maps integration, VNPay/MoMo payment gateways, Fastlane CI/CD pipelines. Custom Dart scripts for test automation. Deployed on iOS & Android.
Confidential Restaurant Booking AppNDA
Flutter, Django
Restaurant booking app with custom iBeacon implementation. Deep native iOS/Android intervention, peripheral device connectivity. Dart automation tools for device testing. Deployed on iOS & Android.
Confidential Escape Room Booking PlatformNDA
Flutter, NestJS (Vendure), PostgreSQL
Escape room booking platform on a self-hosted, deeply customized Vendure (NestJS/TypeORM) commerce backend โ not just a consumer of it. Built the VNPay payment integration end-to-end (create-payment-url, return-url + IPN webhook handlers, refund, status check) as an injectable NestJS service; authored a custom Vendure `OrderProcess` config to fit service-booking flow (no shipping step) instead of e-commerce; built the booking-timer service that holds a slot during payment; contributed to a custom `AuthenticationStrategy` (Google/Apple SSO) and a region/administrative-unit plugin. Custom bash deployment automation using App Store Connect API and Firebase CLI. Nearing deployment.
Confidential Student Verification AppNDA
SwiftUI
Student verification app with ClearPass API integration. Apple School Manager deployment (private enterprise distribution, not public App Store). Python automation for bulk provisioning. Production use.
Confidential IoT Device Management AppNDA
Kotlin, Jetpack Compose, Java
Native Android app for IoT device management. MVVM architecture, high-speed barcode/NFC scanning. Kotlin automation scripts for device simulation. Internal production use.
Confidential Music Streaming AppNDA
React Native, Objective-C
Music streaming application with ad integration. Custom native iOS module in Objective-C for persistent audio stream caching (AVPlayer + NSURLSession-based local caching so playback survives network drops). Deployed on iOS & Android.
Confidential Insurance & MLM ApplicationsNDA
React Native
Insurance and MLM cross-platform applications. Successfully deployed.
Confidential Field Sales Tracking AppNDA
Flutter, GPS Background Tracking
Grab-style background GPS tracking feature for a field sales team (FMCG/beverage industry client), feeding a backend for automated KPI/route calculation.
Confidential Attendance Tracking SystemNDA
ASP.NET Core, MySQL
Attendance/timesheet tracking system (ATS) backend for enterprise workforce management โ the only .NET engagement among AEGONA production projects.
Confidential Field Dispatch & Task Management AppNDA
Flutter
Field dispatch and task management mobile app for a Finnish client, maintained across multiple release cycles from 2021 to 2025.
Confidential Sports Social Networking AppNDA
Flutter
Sports-focused social networking mobile app โ feed, profiles, and social features, maintained over a long-running multi-year engagement (~1700 commits).
Confidential Education Platform (Parent & Teacher Apps)NDA
Flutter
Dual-app education platform: an iPortal parent portal and a companion teacher app for school communication and management.
Confidential Home-Care Staff Shift & Wallet AppNDA
Flutter (FlutterFlow-based)
Shift scheduling and digital wallet app for home-care staff workforce management.
Confidential Cosmetics Label Scanning AppNDA
Flutter
Weighting label scanner app supporting a cosmetics manufacturing/QC workflow.
Confidential E-commerce AppNDA
Flutter
E-commerce mobile app with cart, checkout, and wishlist functionality.
Confidential Insurance Agent AppNDA
Flutter
Insurance agent mobile app covering financial needs analysis (FNA), insurance requests, and policy illustrations.
Confidential E-commerce & Events AppNDA
Flutter
E-commerce and event-focused mobile app.
Backend & Automation Project
Confidential Data Crawling ServiceNDA
Kotlin, Apache Camel, MySQL
High-volume data crawling service built with Kotlin and Apache Camel (camel-http, camel-jdbc, camel-sql, camel-quartz). Dockerized, deployed on AWS with MySQL. Daily cron jobs for automated reporting via Slack webhooks. Kotlin CLI tools for monitoring.
Internal R&D (AEGONA)
Confidential Sports Platform Microservices BackendNDA
NestJS, PostgreSQL, Docker
Internal AEGONA initiative (postponed/cancelled before launch, never reached production) โ microservices backend for a court-booking + social sports app, separate gateway, auth, customer, payment, and partner services, containerized and orchestrated via Docker Compose. Service-separation architecture designed drawing on Vendure's patterns (not built on or using the Vendure codebase itself).
Education
Mobile Development Certificate, 2021
VTC Academy
Bachelor of Electrical and Electronics Engineering, 2019
HCMC University of Technology (HCMUT - OISP)