A full-stack studio engineering games, mobile apps, web platforms, and the infrastructure that connects them. From smart contracts to game servers, Dev00 ships complete products — not fragments.
10 delivered projects across game, mobile, web, backend and blockchain engineering.
From gameplay to infrastructure, Dev00 covers the full surface of a digital product so nothing has to be stitched together across vendors.
Games and real-time experiences built in Unity and shipped to mobile, desktop, and the web.
Cross-platform apps engineered for performance, offline resilience, and native feel.
Product frontends, portals, and dashboards built for speed, clarity, and scale.
APIs, authentication, data modeling, and high-load services that hold products together.
Smart contracts, wallets, token systems, and on-chain event processing.
Electron tools and Python-powered automation that connect systems and devices.
A selection of the systems Dev00 has designed, built, and delivered for clients — spanning mobile, desktop, backend infrastructure, and blockchain.
Play-to-earn game with NFT minting and token-based rewards, built with a scalable backend handling user authentication, game state management, reward distribution, and blockchain transaction orchestration.
Technical Lead (Backend, Game)
One of the most widely used crypto wallets in the Web3 ecosystem, featuring a robust backend architecture built with Node.js for wallet management, secure key handling, transaction signing, and real-time processing of on-chain events to ensure reliable interaction with Ethereum smart contracts and dApps.
Mobile Developer (Freelance)
A cross-platform social networking application built with Flutter, focusing on scalable user management, real-time data synchronization, content sharing, and push notification delivery through Firebase services and RESTful APIs.
Mobile Developer (Freelance)
For Prayer Times is a web-based application designed to calculate and display Islamic prayer times globally, featuring a well-structured frontend architecture built with Next.js, React, and Redux for efficient state management.
Web Developer (Freelance)
Built a crypto token distribution platform with scheduled release rounds, leveraging Solidity smart contracts, a Next.js frontend, and a Node.js service to monitor blockchain events and track token distribution status in real time.
Backend & Blockchain Developer
A crypto slot machine game allowing players to spin and earn token rewards, featuring a Node.js backend responsible for spin validation, reward logic, transaction tracking, and anti-cheat mechanisms, integrated with a Unity cross-platform game client.
Technical Lead (Game developer)
it's an open-source desktop application designed to orchestrate workflows and automate browser actions while managing Android emulators. Built on top of existing open-source projects such as browser-use and droidrun, it provides a unified interface for task automation and remote control.
Desktop app developer
Built a scalable backend system for an e-commerce web application using Node.js, responsible for REST API design, authentication and authorization with JWT, order and user management, and optimizing PostgreSQL queries to ensure high performance and reliability.
Backend Developer (Freelance)
Developed a workout and exercise mobile application using Flutter for the frontend, with a Node.js backend managing workout data, exercise routines, and user progress. Integrated Supabase for database management and authentication to ensure reliable data storage and synchronization. Implemented Node.js services to crawl and collect exercise data from multiple sources, then leveraged AI-based processing to normalize, enrich, and generate structured workout content for the application.
Mobile Developer/ Backend Developer (Freelance)
Developed backend services for a music streaming application, focusing on user data management and media storage using AWS S3, including authentication, playlists, and listening history.
Backend Developer (Freelance)
Languages, frameworks, and tooling grouped by where they operate in a product — from the interface down to the chain.
A tight, transparent loop that keeps the product aligned with the goal and production-ready at every stage.
We map the product goal, the audience, and the technical constraints before writing a line of code.
Systems, data, and interfaces are designed together so the product scales instead of being rebuilt.
Small, verifiable increments across frontend, backend, game, or chain — with quality gates throughout.
Deployment, monitoring, and iteration. The product goes live and keeps improving after launch.
Dev00 is a full-stack technology studio that takes products from first sketch to production. We work across the parts most teams split apart: the game client, the mobile app, the web platform, the API, and the chain underneath it.
That range means fewer handoffs, faster decisions, and systems designed together instead of bolted together. Whether the surface is a play-to-earn game, a fintech wallet, or a high-volume commerce backend, the goal is the same: software that holds up when real users arrive.
Tell us what you are making and where it is stuck. We will come back with a straight read on scope, approach, and next steps.
Or email haihoang1993@gmail.com
