Your app can do more — I'll show it how.
I extend your existing Android or iOS app with new features, modern UI, and smart integrations — cleanly built in, without disrupting your live operations.
Sound familiar?
I keep encountering these situations with companies whose apps work fine — but can't keep up anymore.
Users are waiting for new features
Your customers are asking for features your competitors already have. Every week without an update costs you users and trust.
Your codebase is slowing you down
New features can only be added with enormous effort. Outdated architecture and technical debt make every extension a risk.
Integrations are missing
Your app exists as an island. Connections to payment providers, CRM systems, or external APIs are missing — and that's costing you revenue.
Competitors are pulling ahead
While your competitors ship new features regularly, your app stagnates. Users switch to the alternative that offers more.
Does this sound familiar?
Is feature development right for you?
Your app is live, but it's missing key functionality
The foundation is there, but user needs and business requirements have evolved. I build exactly the features that deliver the most value.
Your app needs a technical refresh
From XML Views to Jetpack Compose, from UIKit to SwiftUI: I modernize your app step by step — without rebuilding everything from scratch.
You want to connect third-party systems
Payment, CRM, analytics, push notifications, or external APIs: I integrate new services cleanly into your existing architecture.
Your team lacks mobile capacity
Your development team is at full capacity or lacks mobile expertise. I step in as a senior developer and deliver the feature — independently and reliably.
Sounds like your situation?
How feature development works
Feature analysis
I understand your goal, analyze the existing codebase, and assess technical feasibility. You get a realistic evaluation of effort, risks, and architectural decisions.
Concept & fixed price
I create a detailed feature concept with technical specifications, milestones, and a binding fixed price. No surprises.
Iterative development
I develop the feature in short cycles with regular demo builds. You see the progress and can give feedback at any time — before it's too late.
Integration & rollout
The feature is thoroughly tested, integrated into the existing app, and rolled out through your release process. I support the launch and remain available afterward.
Ready for the first step?
Why work with me?
I think in architecture
I don't just bolt on new features — I build them in properly. Clean Architecture, MVVM, and testability aren't buzzwords to me, they're daily practice.
Direct communication
No project manager, no middleman. You talk directly to the developer who writes the code. That saves time and avoids misunderstandings.
12+ years of real-world experience
From enterprise apps for IBM to consumer apps for RTL to komoot with 3M+ downloads: I've planned, built, and rolled out features in projects of every scale.
Your existing code is respected
I work with your existing codebase, not against it. No unnecessary refactoring, no dependencies on my ecosystem. Your code stays yours.
Convinced?
Transparent and fair
Feature development at a fixed price. You know what it costs upfront — no surprises.
- Feature analysis, concept, and architecture decisions
- Iterative development with regular demo builds
- Tests and documented, review-ready source code
- Integration into your existing CI/CD pipeline
- Launch support and 30 days of post-launch assistance
All prices exclude VAT. Scope and pricing depend on the complexity of the feature.