Websites, web apps and mobile apps — from idea to launch, on a backend that keeps running

I'm Gioi, a full-stack engineer in Ho Chi Minh City. I build complete products — the site or app your customers use, the admin you run it from, and the server and cloud behind it — or take on just the part you need.

Start a project See my work

What I can do for you

Fixed-scope projects or a monthly arrangement. Not sure which fits? Describe the problem and I'll suggest one.

Most requested · end to end

Full web & app solutions

For founders and businesses who need a complete product, not just code: one person responsible from the first sketch to the live app.

Website or web app your customers use (fast, found on Google)
Mobile app for Android and iPhone — installable, with push notifications
Admin panel to manage content, users and orders
Backend, database, sign-in, hosting, backups and monitoring

Plan & screens
Build
Test
Launch
Support

Typical: 6–16 weeksPrice on requestStart a project

Backend & API development

For startups and product teams that need a solid backend, a new service or an API for their app.

Spring Boot services, REST APIs, PostgreSQL and Redis
Sign-in, a clean data model and automated tests
Documentation and a handover session

Typical: 3–8 weeksPrice on requestStart a project

Cloud setup & migration

For teams moving to AWS or Azure, or whose cloud bill and deploys have got out of hand.

Serverless (Lambda, API Gateway), containers and CI/CD
Single sign-on (Cognito and Entra ID)
A cost and reliability review

Typical: 2–6 weeksPrice on requestStart a project

Audit & rescue

For systems that are slow, unstable or failing security checks — and nobody's sure why.

Performance and architecture review
OWASP and SonarQube security fixes
A written report with a priority list

Typical: 1–2 weeksPrice on requestStart a project

Ongoing maintenance

For products already live that need someone to keep them patched, monitored and improving.

Updates, bug fixes and small features
Monitoring and backups
A set number of hours each month

Typical: MonthlyPrice on requestStart a project

How we'd work together

Clear scope and price before any work starts.

Tell me about it
Fill in the project form. I reply within one working day.
Intro call
30 minutes to understand the goal and constraints. Free.
Proposal
Scope, timeline and a fixed price or monthly rate, in writing.
Build & hand over
Weekly updates, then code, docs and access handed over — it's yours.

Questions

Do you work with clients outside Vietnam?

Yes. I work remotely in English on Vietnam time (GMT+7), which overlaps with Europe's morning and Australia's afternoon.

Who owns the code?

You do. Once the project is paid, the code, designs and accounts are handed over to you.

Can you join an existing team instead of building alone?

Yes. I can take on part of the work inside your team, with your tools and your review process.

What if the scope changes halfway?

We agree on the change in writing before I start it, including what it adds to the time and the price.

Have a project in mind?

Tell me what you're building. You'll get an answer within a day, even if it's "not a fit".

Start a project

Looking to hire full-time? See my CV.