Looking for a mobile app development company that delivers real results? I'm Jim Clermonts — an independent App specialist who brings agency-level expertise without the agency overhead. More than 48 apps shipped, millions of combined users served.
When companies search for a mobile app development company, they typically find agencies with large teams, long timelines, and high overhead costs. I offer a different model: a senior-level specialist who works directly with you, understands your business goals, and ships production-quality code from day one.
Over the past decade, I've delivered mobile app development services to some of the Netherlands' most recognized brands. The Nationale Postcode Loterij trusts their 600,000-user app to the architecture I built. CM.com's payment terminals, powered by Android, processed thousands of flawless transactions at the Dutch Grand Prix. Knab's banking app handles sensitive financial data with the security and reliability their customers expect.
My dual experience as both a developer and product owner means I don't just write code — I understand how mobile products drive business value. I help translate your strategic goals into technical decisions that make sense, avoiding over-engineering while ensuring your app can scale when the time comes.
End-to-end native Android app development using Kotlin, Jetpack Compose, and modern architecture patterns. I build apps that are fast, reliable, and take full advantage of the Android platform.
Kotlin Multiplatform development for sharing business logic between Android and iOS while keeping native UI performance. Proven to reduce development costs by up to 30%.
Technical reviews, architecture design, and hands-on mentoring for your Android team. I help organizations establish patterns and practices that improve velocity and reduce technical debt.
Ongoing support after launch: bug fixes, OS compatibility updates, dependency upgrades, performance optimization, and feature additions to keep your app competitive.
My mobile app development services span multiple industries, each with unique requirements for security, compliance, and user experience.
Postcode Loterij — 600k users
Knab (Aegon) — bank-grade security
CM.com — EMV-compliant terminals
Beterdichtbij — NEN 7510 compliant
Oxxio — smart meter integration
de Bijenkorf — premium shopping
"Although Jim did not come from the payment industry, he proved to be quite valuable to the team and the department. Together with our Enterprise Architect he worked on several proof of concepts of which a few of them have laid the basis for functionality currently in production."
Whether you need a new app built from scratch, an existing app modernized, or expert guidance for your development team — I'm here to help. Let's have a no-obligation conversation about your project.