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3K TechOne

Custom software development · Vietnam

Turn your idea into working software

We build custom web apps, mobile apps, enterprise software, and AI features. Our team has over 5 years of experience and works with you from shaping the idea to after launch.

years of team experience
5+
projects
10+
service areas
6
working languages: Vietnamese, English, Japanese
3

Featured projects

Some of the systems we have built.

View projects
  • Travel and hospitality Coming 2027

    IGOGO

    A platform that connects travelers with homestay hosts across Vietnam, with mobile and web apps and an AI assistant for planning itineraries.

    Next.js · TypeScript · React Native · Expo · NestJS

  • Productivity Live

    OmiTask

    An AI-assisted to-do list app that adapts to the way you work and lets you switch productivity methods with a single click.

    React · TypeScript · NestJS · PostgreSQL · Redis

Why 3K TechOne

We don't just write code. We are your technology partner.

  1. Cross-industry experience

    Our team has built software for healthcare, education, e-commerce, logistics, and HR management. We understand your problem quickly.

  2. Flexible, short cycles

    We work in short iterations and share progress updates often. When requirements change, the plan adapts.

  3. Quality comes first

    Code is reviewed and tested before delivery. The system runs reliably and is easy to maintain later.

  4. Transparent quotes

    Costs are broken down by line item, with no hidden costs. You know what you are paying for.

Frequently asked questions

Short answers to common questions before you start a project.

How much does custom software cost?

The cost depends on the number of features, the complexity, and the timeline. After a free initial discussion, we send a quote broken down by line item, with no hidden costs.

How long does it take to develop software?

A simple app usually takes 2–3 months. A complex enterprise system can take 6–12 months. If you need to launch early, we build an MVP first and then expand step by step.

Do you sign NDAs?

Yes. We can sign a non-disclosure agreement (NDA) before you share project details. Your ideas and data are kept confidential.

What if my idea isn't clear yet?

That's fine. We work with you to clarify requirements, choose suitable technology, and draw up a roadmap, so your idea becomes a concrete plan.

Do you provide maintenance after launch?

Yes. After delivery, there is a warranty period for bug fixes under the contract. After that, you can choose a long-term support package for bug fixes, updates, and new features.

How does payment work?

Payment is usually split by project milestones, for example at contract signing, on completion of the development phase, and at acceptance. The exact percentages follow each project's contract.

Can you work with our in-house development team?

Yes. We can work alongside your in-house team or take on a separate part of the work end to end, depending on how you want to collaborate.

How are you different from other agencies?

You work directly with the founder and a team with many years of experience, without layers of intermediaries. We are lean, our quotes are transparent, and we work closely with you throughout the project.

Ready to start your project?

Tell us about your idea. The first conversation is completely free.