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Hire 13 Top Xamarin Developers

xamarin developers - Hire 13 Top Xamarin Developers

Xamarin has a vibrant global community of expert developers, open-source contributors, and tech influencers driving cross-platform mobile development forward.

Below is an updated list of the world’s top Xamarin developers (including those leading the transition to .NET MAUI), selected for their impact across open-source contributions, startup leadership (while still coding), technical content creation, roles at major tech companies, and even achievements in programming competitions – all considered equally. These individuals have helped shape Xamarin and its ecosystem (now evolving into .NET MAUI) through their code, products, and knowledge sharing:

  1. Maddy Montaquila
  2. Laurent Bugnion
  3. James Montemagno
  4. Leomaris Reyes
  5. David Ortinau
  6. Miguel de Icaza
  7. Dan Siegel
  8. Jonathan Dick
  9. Frank Krueger
  10. Charlin Agramonte
  11. Javier Suárez Ruiz
  12. Brandon Minnick
  13. Pedro Jesús

Now, let’s delve deeper into each of these remarkable developers and why they are recognized among the top.

Maddy Montaquila

YouTube Video

Nationality: American

Maddy played a key role in shaping the developer experience of Xamarin and .NET MAUI. Starting as an intern on the Xamarin team in 2018, she quickly became a leading advocate for improving mobile development workflows.

Maddy has been the public face of .NET MAUI at many conferences, livestreams, and training sessions, helping thousands of developers transition from Xamarin.Forms to MAUI. She focuses on productivity tooling – both local and cloud – and often creates demo apps and documentation to showcase new features. As an influential speaker and PM, Maddy’s efforts have greatly boosted MAUI adoption and community enthusiasm.

Laurent Bugnion

Nationality: Swiss

Laurent is a highly respected developer/architect in the .NET community, most famous for creating the MVVM Light Toolkit, which has been widely used in WPF, Silverlight, and Xamarin.Forms projects.

A veteran of XAML and C#, Laurent was a Microsoft Regional Director and MVP for years before recently joining AWS as a .NET Advocate. He’s authored books and given countless talks, drawing on decades of experience from early WPF to today’s .NET MAUI. Laurent actively contributes to open source (publishing libraries and samples) and helps ensure .NET (including MAUI) runs great on AWS cloud. His long history of tool-building (MVVM Light’s patterns influenced newer MVVM libraries) and community leadership make him a towering figure in cross-platform .NET development.

James Montemagno

James Montemagno 1 - Hire 13 Top Xamarin Developers

Nationality: American

James is an influential developer and evangelist in the Xamarin and .NET MAUI community. A Principal PM at Microsoft, he’s been crafting cross-platform apps since 2011 with Xamarin.

James created numerous popular Xamarin plugins that became essential building blocks and were later unified as Xamarin.Essentials. A prolific content creator, James co-hosts the weekly “Merge Conflict” development podcast and hosted The Xamarin Show on Channel 9, teaching countless developers via videos and blog posts. An active open-source contributor and community leader, he has helped developers share code across iOS, Android, and Windows. For example, his libraries like Connectivity and Settings are widely used by Xamarin developers. James exemplifies the blend of engineering skill and community influence – he not only built apps at a startup before Microsoft, but now spearheads .NET outreach and helped shape Xamarin.Essentials into the core of .NET MAUI.

Leomaris Reyes

Nationality: Dominican

Leomaris is a Microsoft MVP and one of the most prominent Xamarin educators, known for her blog “Ask Xammy” which features dozens of Xamarin.Forms and .NET MAUI tutorials. Based in the Dominican Republic, she has 6+ years of experience and is a Xamarin Certified Developer.

Leomaris often focuses on elegant UI designs, accessibility, and best practices in her articles. Beyond blogging, she has organized community events like “Xamarin Month” to encourage knowledge sharing globally. She currently works as a mobile developer at a fintech startup (Ontop), applying her MAUI skills in production apps, and remains active in the Women Techmakers community to inspire more women in tech. Leomaris’s clear and friendly explanations have lowered the barrier to entry for many new Xamarin/Maui devs, earning her a place among the top influencers in the community.

David Ortinau

David Ortinau - Hire 13 Top Xamarin Developers

Nationality: American

David is the product management lead overseeing .NET MAUI’s evolution at Microsoft. A .NET developer since 2002, David worked at startups and even ran his own software company before joining Microsoft – giving him a unique perspective as both a startup tech leader and now a PM.

At Microsoft, he became the face of Xamarin.Forms and now .NET MAUI, coordinating engineering and community efforts. David frequently blogs and speaks about new MAUI features and best practices, and under his leadership the framework has embraced more community contributions and improved developer experience. For example, David has highlighted how MAUI simplifies multi-platform app development and integrates community toolkits. His mix of product vision, hands-on coding experience, and community engagement has been crucial in guiding Xamarin.Forms through to MAUI’s launch. David’s impact on the framework’s direction and the ecosystem’s growth cements his spot among the top Xamarin/MAUI leaders.

Miguel de Icaza

At Xamarin I left every day at 5pm and I prioritized a healthy life/work balance – and hope I lead my people that way.

Nationality: Mexican-American

Miguel is a legendary open-source developer best known for initiating GNOME, Mono, and Xamarin. As Xamarin’s co-founder and CTO, he was instrumental in open-sourcing the Mono runtime and making C# a viable mobile development platform.

Miguel’s leadership led to Xamarin’s acquisition by Microsoft and the launch of Xamarin.Forms, which later evolved into .NET MAUI. Until 2022 he served as a Distinguished Engineer at Microsoft, helping open-source Xamarin and kickstart the .NET Foundation. Even after leaving Microsoft, Miguel’s influence endures – the vision of “write C# once, run on iOS/Android” that he championed is now reality in .NET MAUI. For his contributions, he’s received numerous awards. Miguel’s unique combination of technical brilliance and open-source evangelism secures his place among the all-time top Xamarin/Mobile .NET developers.

Dan Siegel

Dan Siegel - Hire 13 Top Xamarin Developers

Nationality: American

Dan is an avid open-source contributor best known as a maintainer of the popular Prism Library which he expanded to support Xamarin.Forms and now .NET MAUI.

As a Microsoft MVP for 7+ years, Dan has contributed to many libraries like DryIoc and created tools to streamline DevOps for Xamarin/Maui apps. He regularly speaks at .NET user groups and conferences, sharing deep architectural insights on MVVM, dependency injection, and code reuse. Dan’s company, AvantiPoint, produces open-source libraries and offers consulting around MAUI – exemplifying the startup founder who still codes daily. His engineering excellence and community mentorship have made him well-known in Xamarin/Maui circles, easily earning him recognition as a top Xamarin developer.

Jonathan Dick

Nationality: Canadian

Jonathan “Jon” Dick is the engineering lead for the Xamarin.Android and .NET MAUI Toolkit teams at Microsoft. Hailing from Canada, Jon has been developing with Xamarin since its early days and was known in the community by the handle “Redth.”

He co-hosted the Gone Mobile podcast and authored numerous open-source projects on GitHub. At Microsoft, Jon was pivotal in the creation of Xamarin.Essentials and now drives the architecture of .NET MAUI – for example, he led the single project system and the new handler architecture replacing Xamarin.Forms renderers. His deep, hands-on contributions make him one of the most famous open-source contributors in this space. As a team lead, Jon also mentors other engineers and engages the community on GitHub and in podcasts. His technical leadership ensures MAUI’s core is robust and innovative, which is why he’s regarded among the very best in the Xamarin/Maui ecosystem.

Frank Krueger

Nationality: American

Frank is an independent Xamarin developer who achieved fame by creating innovative apps and developer tools single-handedly. He’s well known for popular iOS apps like iCircuit (circuit simulator) and Calca (markdown-based calculator), all built entirely in C# using Xamarin.

Frank also wowed developers by releasing Continuous, a C# & F# IDE that runs on the iPad, bringing live .NET coding to mobile devices. He co-hosts the “Merge Conflict” podcast with James Montemagno, where his deep knowledge of .NET (and love of F#) often shines. Frank’s open-source projects, such as Ooui, demonstrate his creativity with .NET. Notably, Frank is also a former international math olympiad medalist, reflecting his extraordinary programming talent. As a startup founder/indie hacker, he proves that one developer can create world-class software with Xamarin/Maui. This blend of exceptional coding skill and practical app-building experience secures Frank’s spot among the top Xamarin developers.

Charlin Agramonte

Charlin Agramonte - Hire 13 Top Xamarin Developers

Nationality: Dominican

Charlin has been a cornerstone of the Xamarin community, especially in Latin America. She co-founded CrossGeeks, a consulting firm focused on Xamarin solutions, and runs the popular blog XamGirl.com.

With 10+ years in .NET and experience dating back to Xamarin.Forms’ launch in 2014, Charlin has published dozens of Xamarin and MAUI tutorials on XamGirl. She is also a leader of the .NET Dominicana community and frequently speaks at international conferences. As an entrepreneur, Charlin continues to actively code and architect mobile solutions at CrossGeeks while mentoring other developers. Her passion for mobile development and consistent knowledge sharing (in both English and Spanish) have made her one of the most influential bloggers and community leaders in the Xamarin world.

Javier Suárez Ruiz

Nationality: Spanish

Javier is a Microsoft engineer on the Xamarin.Forms & .NET MAUI team, and was a Xamarin MVP prior to joining Microsoft. Based in Spain, he first gained recognition through his community blog and contributions.

Now at Microsoft, Javier is one of the key contributors to the MAUI codebase, specializing in graphics, performance tweaks, and new UX controls. For example, he has worked on enhancing MAUI’s graphics drawing capabilities and helped introduce new controls in .NET MAUI. Javier also curates the .NET MAUI Showcase of sample apps to inspire developers, and remains a “community helper” – speaking at events and enthusiastically sharing tips on Twitter. His dual identity as a former MVP and now core framework engineer means he deeply understands developer needs. Javier’s work on performance improvements and his approachable online presence make him a standout Xamarin/MAUI developer.

Brandon Minnick

Brandon Minnick - Hire 13 Top Xamarin Developers

Nationality: American

Brandon is a Xamarin/Maui app developer who has worn many hats – he was a Developer Advocate at Microsoft and is now a Developer Advocate at AWS, focusing on .NET. Known online as “The Code Traveler”, Brandon has a strong community presence.

He has nearly a decade of experience building iOS and Android apps in C#, including open-source apps like GitTrends (a Xamarin.Forms app for GitHub analytics). At Microsoft, Brandon co-hosted the weekly Xamarin and MAUI Community Stand-ups and produced video tutorials, becoming a friendly face for developers learning mobile .NET. Now at AWS, he continues to promote .NET MAUI by demonstrating how to integrate it with cloud services.

Brandon is also very active on StackOverflow (one of the top Xamarin answerers) and writes blog articles on MAUI best practices. With this mix of real-world app development and community advocacy, Brandon exemplifies the modern cross-platform developer and easily earns recognition among the top Xamarin/Maui developers.

Pedro Jesús

Nationality: Brazilian

Pedro, often known by his handle “pictos”, is a pillar of the Xamarin/Maui open-source community. He is a core maintainer of the Xamarin Community Toolkit and its successor, the .NET MAUI Community Toolkit, which provides ready-made UI controls and helpers for developers.

Pedro’s expertise lies in building reusable controls, behaviors, and extensions that simplify Xamarin development. For example, he contributed features like the Expander control and various state management helpers in the toolkit. A C# developer from Brazil, Pedro has also been a frequent code contributor to the MAUI framework itself – often submitting pull requests for bug fixes and performance improvements. He shares his knowledge through talks at events like .NET Conf and community stand-ups. Colleagues jokingly call him “Jesus” in the community for his almost savior-like contributions. By equipping Xamarin/Maui developers with quality components and actively shaping the framework’s evolution, Pedro has undoubtedly earned recognition as one of the top Xamarin developers worldwide.

Wrap Up

These legends represent exceptional talent, making them extremely challenging to headhunt. However, there are thousands of other highly skilled IT professionals available to hire with our help. Contact us, and we will be happy to discuss your hiring needs.

Note: We’ve dedicated significant time and effort to creating and verifying this curated list of top talent. However, if you believe a correction or addition is needed, feel free to reach out. We’ll gladly review and update the page.

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