Development•May 14
Reduceer tot 30% op uw Mobiele App Ontwikkel kosten
Hoe u met een Mobile Back-end As A Service (MBaaS) uw app ontwikkelkosten drastisch kunt verlagen terwijl u zich focust op uw core business.
Freelance Android
Developer
Based in Amsterdam. 10+ years building apps used by millions.
23+
Apps delivered
10+
Years of experience
Millions
of users reached
SCROLL
I build native Android apps that are high performant and look incredible.
With 10+ years of hands-on experience, I combine deep Android expertise with product ownership skills to deliver apps that users love and businesses depend on.
Android Development
Native Android development with Kotlin and Java. Modern architecture with MVVM, Coroutines, Jetpack Compose, and Material Design.
Kotlin & Java
Jetpack Compose
MVVM & Clean Architecture
Consultancy
Requirements gathering, software architecture review, UX consultation, and team coaching to help your development team level up.
Architecture Review
Requirements Gathering
Team Coaching
Product Ownership
Backlog management, stakeholder collaboration, and product lifecycle management. Bridging the gap between business and engineering.
Backlog Management
Stakeholder Collaboration
Product Strategy
Interested in working together?
Explore my servicesTrusted by leading brands
I've had the privilege of building Android apps for some of the Netherlands' most recognized companies.
23+
Apps built & shipped
10+
Years of Android experience
2018
Freelancer of the Year nominee
Ready to build your next Android app?
Start a conversationSelected work
A selection of Android apps I've built for leading Dutch brands across lottery, banking, payments, retail, and more.
2023–2025
KotlinAndroidProduct Ownership
Postcode Loterij App
Lottery & Entertainment
Android app for the Netherlands' largest charity lottery, enabling millions of players to check results, manage subscriptions, and engage with the lottery experience.
2023–2025
KotlinAndroidProduct Ownership
Vriendenloterij App
Lottery & Entertainment
Native Android app for the VriendenLoterij, providing a seamless mobile experience for lottery participants to check draws, manage their account, and stay engaged.
2021–2023
KotlinAndroidPayments
SmartPOS Payment System
Fintech & Payments
Android-based SmartPOS payment terminal application for CM.com's PayPlaza platform, enabling merchants to accept payments through a modern, integrated point-of-sale system.
View project
2020–2021
KotlinAndroidBanking
Knab Banking App
Fintech & Banking
Native Android app for Knab, an innovative online bank by Aegon. Built a modern banking experience with real-time account management, payments, and financial insights.
Turning ideas into apps people love
I partner with companies to build native Android apps that are reliable, performant, and a joy to use.
View my services
About me
Android Developer and Product Owner with 10+ years of experience in enterprise Android apps and 4 years of managing software teams. My recent focus has been on consumer Android apps in banking and fundraising, plus mobile payment systems.
I've recruited and coached junior developers, taken ownership of architecture, launched several app startups, and participated in international hackathons. I also worked in Silicon Valley as part of a traineeship.
"Wake up with Determination, Go to bed with Satisfaction"
— George Lorimer (my mojo)
Watch my introduction
Watch on YouTubeLatest insights
Thoughts on mobile development, app architecture, and the tech industry.
Insights•Dec 31
Best of 2015: A Special Present for Smart People
A curated collection of the most valuable videos of 2015 across software, inspiration, visions, productivity, and business.
Development•Nov 5
Programmers are from Saturnus, Customers are from Jupiter
On the communication gap between programmers and customers, and how Behaviour Driven Development (BDD) can bridge it.
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Get notified when I publish new articles about Android development, architecture patterns, and mobile product strategy.
Frequently asked questions
Everything you need to know about working with me. Can't find what you're looking for? Feel free to reach out.
Jim Clermonts is a freelance Android developer and Product Owner based in Amsterdam, the Netherlands. With over 10 years of experience, he has built enterprise Android apps for leading Dutch brands including Nationale Postcode Loterij, Knab, de Bijenkorf, CM.com, Oxxio, and many more. He holds a Bachelor's degree in Computer Science from Fontys University and was nominated for Freelancer of the Year in 2018.
Jim specializes in native Android development using Kotlin and Java. His technology stack includes Android SDK, Jetpack Compose, MVVM architecture, Coroutines, Android Jetpack libraries, Material Design, Room Database, Retrofit, Dagger/Hilt, and CI/CD pipelines. He has experience with both modern Kotlin-first development and legacy Java codebases.
Jim has worked for major Dutch companies including Nationale Postcode Loterij (2023–2025), Vriendenloterij (2023–2025), CM.com/PayPlaza (2021–2023), Knab/Aegon (2020–2021), Beterdichtbij (2019), Oxxio (2018), de Bijenkorf (2017), and earlier clients like Interpolis, Nuon, and Bosch.
Yes, Jim is available for freelance Android development projects, consultancy, and product ownership roles. He works both on-site in the Amsterdam area and remotely. You can reach him at Jim@JimClermonts.nl or call +31 6 17 30 70 04 to discuss your project needs and availability.
Jim is based in Amsterdam, the Netherlands. He works on-site with clients in the Amsterdam metropolitan area and is also available for remote work. His business is registered at the Dutch Chamber of Commerce (KvK: 17265486).
Jim's process starts with understanding your project requirements, including the programming language, frameworks, team size, and location. He then provides a rough time estimation and discusses the approach. During development, he follows Agile/Scrum methodologies with regular check-ins. After delivery, he provides ongoing support to keep the software up to date.
While Jim's primary expertise and focus is native Android development with Kotlin and Java, he does have experience with iOS development using Swift and Objective-C. He has built iOS apps earlier in his career, including the Wobbly iOS app. For iOS-specific projects, he can advise on architecture and approach.
You can reach Jim via email at Jim@JimClermonts.nl, by phone at +31 6 17 30 70 04, or connect on LinkedIn at linkedin.com/in/jimclermonts. You can also visit the contact page on this website to send a message directly.
Still have questions?
I'm happy to help. Get in touch and I'll get back to you within 24 hours.