Duong Cong Tung

(Tung Duong)

Senior Full Stack Developer

Passionate about crafting digital experiences that seamlessly blend form and function. With expertise in full-stack development, advanced AI integration, and machine learning implementation, I transform complex challenges into elegant, user-centric solutions. My code doesn't just work—it empowers businesses through intelligent systems, predictive analytics, and natural language processing, delivering smarter applications that adapt and evolve with users' needs.

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Duong Cong Tung

About Me

I'm a full-stack developer with a passion for crafting elegant solutions to complex problems. Specializing in JavaScript ecosystems, I blend technical expertise with creative thinking to build applications that not only function flawlessly but also delight users with their intuitive design and performance.

Since late 2023, I've been deeply fascinated by artificial intelligence and its creative applications. I actively use AI for content creation—generating images, videos, and even music. I'm particularly enthusiastic about working with Open Source LLMs and other language models to enhance my productivity and workflow. This passion has driven me to continuously expand my knowledge in the AI field, with the goal of becoming an AI expert.

Beyond coding, I'm an avid marathoner who applies the same discipline and persistence to software development that I bring to long-distance running. This mindset helps me tackle challenging projects with endurance and precision, always pushing toward excellence while maintaining a balanced perspective on both technical achievements and user needs.

AI & ML

LLMs, Ollama, Stable Diffusion, HuggingFace, Langchain, N8N

Frontend

React, Next.js, Redux

Backend

Node.js, Express, Laravel

Mobile

React Native, Android, Expo, Native Modules

Database

MongoDB, Mongoose, PostgreSQL, MySQL, Supabase, Firebase

Performance

Optimization, Caching

Professional Experience

Senior Full-stack Developer

Amplifi & Impact Ltd

December 2024 - Present

Hanoi, Vietnam

Leading full-stack development projects
Architecting scalable web applications
Implementing modern frontend frameworks and backend technologies
Collaborating with cross-functional teams

Senior Full-stack Developer

Peppermint Innovation Limited

December 2023 - December 2024

Hanoi, Vietnam

Developed and maintained full-stack applications
Worked with modern JavaScript frameworks
Implemented responsive designs and backend APIs
Collaborated with teams to deliver high-quality software solutions

Full-stack Developer

Xpon Technologies

January 2021 - December 2023

Hanoi, Vietnam

Built and maintained web applications using modern technologies
Implemented frontend interfaces with React and backend systems with Node.js
Worked with databases and API design
Collaborated in an Agile development environment

Full Stack Developer, Mobile Developer

Holoscribe

June 2020 - December 2020

Remote

Developed both web and mobile applications
Implemented full-stack solutions with modern frameworks
Worked on cross-platform mobile development
Created responsive and user-friendly interfaces

Fullstack Developer

Focal Labs Limited

April 2018 - December 2019

London, United Kingdom

Developed full-stack web applications
Worked with JavaScript frameworks and backend technologies
Implemented database solutions and API integrations
Participated in the full software development lifecycle

Mobile Developer

Freelancer.com

August 2017 - March 2018

Remote

Developed mobile applications for various clients
Created cross-platform solutions using React Native
Designed and implemented UI/UX for mobile interfaces
Collaborated directly with clients to deliver customized solutions

IT Specialist

GaneshAID Non-profit Consultancy Company

October 2016 - August 2017

Hanoi, Vietnam

Managed IT infrastructure and systems
Developed and maintained web applications
Provided technical support and solutions
Implemented digital strategies for non-profit initiatives

Web Developer

Freelancer.com

January 2014 - October 2016

Remote

Developed websites using PHP, WordPress, HTML, JS, and CSS
Created custom WordPress themes and plugins
Implemented responsive designs and user interfaces
Worked directly with clients to deliver web solutions

Skills & Expertise

AI & Machine Learning

Ollama, LLMs, HuggingFace, Stable Diffusion, Langchain, OpenAI

Developing with local and cloud-based AI models, fine-tuning with LoRA, creating image generation workflows with ComfyUI, and building AI automation pipelines with N8N.

Frontend Development

React.js, Next.js, Redux

Building responsive and interactive web applications with modern React ecosystem and server-side rendering for optimal performance.

Backend Development

Node.js, Express, Laravel

Creating robust and scalable server-side applications with focus on clean architecture and API design.

Mobile Development

React Native, Android, Expo, Native Modules

Developing cross-platform mobile applications with React Native, Android, custom native modules, and Expo for rapid deployment.

Database Management

MongoDB, PostgreSQL, MySQL, Supabase, Firebase

Working with both SQL and NoSQL databases to design efficient schemas and optimize queries for various application needs.

TypeScript/JavaScript

ES6+, TypeScript, Type Safety

Writing maintainable and type-safe code with modern JavaScript features and TypeScript for improved developer experience.

State Management

Redux, Context API, Recoil, Zustand

Implementing efficient state management solutions for complex web and mobile applications.

Version Control & CI/CD

Git, GitHub, GitHub Actions, CI/CD

Managing code versions and implementing automated testing and deployment pipelines for efficient development workflows.

Web Performance

Optimization, SSR, Caching, SEO

Optimizing web applications for speed, accessibility, and search engine visibility using modern performance techniques.

Cloud Services

AWS, Firebase, Vercel, Netlify

Deploying and managing applications using various cloud platforms and services for scalable infrastructure.

My Services

Web Application Development

Modern, performant web applications built with React and Next.js. I create intuitive user interfaces that convert visitors into customers with seamless interactions and responsive design.

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Mobile App Development

Cross-platform mobile applications using React Native and Expo. I deliver native-feeling iOS and Android apps from a single codebase, maximizing efficiency without compromising on quality.

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Backend Development

Scalable and efficient server-side solutions with Node.js, Express, and Laravel. I build robust APIs and microservices that power your applications with reliability and performance.

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Database Design & Integration

Optimized database architecture using MongoDB, PostgreSQL, MySQL and cloud solutions like Supabase and Firebase. I design schemas that ensure data integrity while maintaining fast query performance.

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Performance Optimization

Speed up your existing applications through code analysis, optimization techniques, and implementing best practices. I improve load times, responsiveness, and overall user experience.

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Full-Stack Development

End-to-end development solutions from concept to deployment. I handle the entire technical stack, ensuring seamless integration between frontend interfaces and backend systems.

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