App & Web Development for Startups
App and web development at Golden Sea means shipping — from concept to working product, fast. Based in Ho Chi Minh City, Vietnam, we build web apps, mobile apps, and blockchain products for startups and businesses globally.
Discuss your project
What is included
A closer look
MVP in 2 weeks is a real capability, not a tagline. We cut to the product core, remove everything non-essential for v1, and get working software in front of real users as fast as possible. Several clients have gone from concept to investor demo in 10–14 days.
App development stack: Next.js, React, Node.js, TypeScript, Python, Java Spring, React Native (iOS + Android), AWS, Vercel. Blockchain: Solidity on BNB Chain, Polygon, Ethereum — staking, NFTs, DeFi, GameFi. Smart contracts audited by CertiK before mainnet.
Golden Sea stays after launch: monitoring, bug fixes, next features. Not the team that delivers and disappears.
Selected work
How the engagement runs
Frame the problem
We study users, goals, data, and real constraints before proposing a solution.
Define the scope
You see milestones, responsibilities, and success measures before work begins.
Build and validate
Every phase produces working software for early review and informed decisions.
Run it reliably
After go-live, we monitor, resolve issues, and improve from real usage data.
Have a problem worth solving?
Send a short brief. We reply within one business day.