• Android
  • iOS

You need an app?
I will make it happen.

I develop your app for Android and iOS with 50 % less development and maintenance costs using Kotlin Multiplatform.

  • Development of new apps
  • Modernization & Optimization
  • Maintenance & Support


Free intro call


Page Keeper app on iPhone Lazy Pizza app on an Android phone Jörg Voyé — app developer based in Hamburg
Services

What I build for you

Whether it's a brand-new app or the modernization of an existing solution — you get software your customers love to use and that grows with your business.

  • New apps for Android & iOS

    From the first idea to the app store release: I build native or cross-platform apps with clean, maintainable code – tailored to your audience and your budget.

    • Development & Invoices in milestones
    • Kotlin Multiplatform for Android & iOS from one shared codebase
    • UX/UI concept developed together with you
    • Integration with backends, APIs & databases
    • Release support on the App Store & Play Store

  • Optimizing existing apps

    Your app runs, but not smoothly? I analyse performance, stability and user flows, then fix exactly what is actually slowing your users down.

    • Performance & loading time analysis
    • Fewer crashes and errors
    • Fixing UX weak spots
    • Measurable before/after metrics

  • Modernizing legacy apps

    I bring your grown or outdated app up to today's standards – technically, visually and security-wise – without you having to start from scratch.

    • Migration to current frameworks & OS versions
    • Reworked design & interaction concept
    • Closing security gaps
    • Step-by-step migration with no downtime

  • Ongoing development & support

    After the launch comes the next feature. I support your app long term – with new functionality, updates and fast help whenever something breaks.

    • Continuous feature development
    • Maintenance for OS & store updates
    • Monitoring & quick bug fixes
    • Flexible support packages as needed
Portfolio

Selected projects

Three apps, three different requirements — a glimpse of how I turn ideas into finished products.

I'm looking forward to your app project.

Schedule an intro call lasting about 30 minutes.

Free intro call
How your app is built

Your app in five steps

Transparent and predictable — you always know where your project stands.

  1. Intro call

    In a free video call we talk, with no obligation, about your app project, your goals and your requirements. You get first suggestions on how it could be built, and at the end I give you a rough estimate of the effort and the time needed to develop your app.

    • We get to know each other
    • You introduce me to your app project
    • Advice on how to build it
    • Rough estimate of the effort and duration of your app project

  2. Concept & quote

    In the second step, a concept and the design are created, including a clickable prototype of your app. Once you have signed off on the concept and design, you receive a final, transparent quote with a milestone-based timeline.

    • Concept created for your app
    • You get a clickable prototype
    • We fine-tune it together
    • Final quote for developing your app

  3. Development

    Your app is developed in short stages, usually in two-week sprints. That gives you the chance to give feedback regularly: after every milestone reached, you receive a preview build to try out.

    • Development of your app
    • Short sprints
    • Feedback loops
    • Milestone-based preview builds

  4. Testing & launch

    The development process includes continuous testing, be it unit tests, integration tests or UI tests. Before your app is released in the app stores, it is tested on a wide range of real devices.

    • Automated tests
    • Manual user testing
    • Release on the Google Play Store
    • Release on Apple's App Store

  5. Support & updates

    On request I provide regular updates or take care of further development, so that your app always stays technically up to date. Since it is not only releasing an app that matters but also running it, we can optionally agree on a support contract, a so-called service level agreement. It sets out precisely how faults in your app will be resolved should they occur.

    • Service level agreement
    • Regular updates
    • Further development of features
    • Bug fixing
Jörg Voyé, founder and owner of JV Coding Solutions
About me

Jörg Voyé

Founder & Owner

I help companies bring new app projects to life — from the first concept through to release — and modernize existing legacy applications.

For app development on Android and iOS I rely on modern Kotlin Multiplatform technology: a shared codebase lets both platforms be built faster and more cost-effectively, without giving up native performance.

Across more than 12 years in IT and software development I have worked in a range of roles — project management, product management and consulting — for mid-sized companies as well as in international corporate environments, gaining extensive experience of the complete lifecycle of software applications.

That professional experience is exactly what makes the difference when working with companies: I support clients end to end on their app projects, from concept through development to launch and operations.

Let's meet
FAQ

Frequently asked questions

Answers to the questions that come up most often in a first call.

How does a typical project work?

It starts with a free introductory call in which we discuss your app project and clarify your requirements and goals. Based on those requirements, a concept and design for your app are created. Once you have approved them, the app is developed in short stages. At regular intervals you receive a working build to try out — all the way to launch in the app stores.

What does it cost to develop an app?

It depends on the scope of features — every app is different. With Kotlin Multiplatform, Android and iOS share a common codebase, which significantly reduces development and maintenance costs. Once the app concept and the design have been agreed together, you receive a final, transparent quote.

How long does it take until the app is finished?

A first usable prototype (MVP) is often achievable within a few weeks, depending on the scope. Because I develop in short stages, you receive a working build at regular intervals. We define the concrete timeline together in the concept.

What about updates and support?

On request I support your app beyond release — with updates, bug fixes, adjustments to new operating system versions and the implementation of new features. That keeps your app up to date over the long term.

How do we communicate during the project?

For communication during the project I like to use MS Teams or Slack — whichever you prefer. A dedicated channel holds all the requirements, design templates and documents. There you can also transparently follow the progress of your app's development in the stored project plan. Whenever a previously defined milestone is reached — usually every two weeks — we have a joint video call.

Contact

Let's get to know each other

Drop me a line by e-mail or on LinkedIn — or book your free 30-minute intro call right here.

Prefer writing?