JW Cornelis

Software Engineer

Your Mobile App Development Partner

Whether you're launching a brand-new app or scaling an existing one, I help businesses build apps that not only work, but thrive across all devices. From iOS and Android to tablets and beyond, I create experiences that feel seamless and perform at every touchpoint.

With years of experience crafting apps for a diverse range of industries, I build solutions that adapt to your unique needs—whether that's in-app purchases, real-time syncing, or optimizing for performance across multiple platforms.

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Build a game-changing app in weeks

  • Not just another app

    I don't just make apps that ‘work.’ I create experiences that users actually want to spend time on. Your app will be more than functional—it will be intuitive, fast, and designed to keep users engaged.

  • Ready for any device

    From phones to tablets, your app will look and feel like it was built for each device. I optimize for different screen sizes and resolutions so your users get the best experience—every time.

  • Beyond the basics

    Your app can do more than you think. I integrate complex features like in-app purchases, real-time syncing, notifications, and custom APIs to create something that fits exactly what your business needs.

  • Automate the mundane

    Save time and focus on growth by automating repetitive tasks within your app. From handling payments to syncing across devices, I'll help your app run smoothly so you can focus on the bigger picture.

What can I help you with?

  • Custom mobile apps

    I develop apps tailored to your brand and business. Whether it’s a sleek new concept or a rebuild of an existing app, I ensure your app stands out and scales with ease.

  • Cross-platform development

    Building for iOS, Android, or both? I deliver apps that perform flawlessly across platforms, using the latest technologies to give you a future-proof product.

  • App Store deployment & optimization

    From handling the entire App Store submission process to optimizing for discoverability and downloads, I ensure your app gets noticed and performs well.

  • In-app purchases & subscriptions

    Monetize your app with ease. I integrate subscription models, in-app purchases, and payment systems that offer flexibility for your users and reliability for your business.

  • Data sync & offline capabilities

    Your app should work whether your users are online or offline. I develop apps with real-time syncing and offline-first approaches, ensuring seamless functionality no matter where your users are.

Build an app that changes the game

I don’t just build apps—I help you create something that users will love, from the first tap to long-term engagement. By focusing on your goals, customers, and vision, we’ll build an app that’s ready to outperform the competition.

Frequently asked questions

  • How long does it take to build an app?

  • What does mobile app development cost?

  • How do you approach app development?

  • Can you work on an existing app?

  • Do you provide post-launch support?

  • Can you build custom features for my app?

  • Will my app work across all devices?