Clario, part of Thermo Fisher Scientific is seeking a Lead Mobile Application Engineer (.
NET MAUI / Xamarin) to provide technical leadership in the design, development, and evolution of the Clario App—our core mobile platform used by patients and clinical research sites across global clinical trials. This platform plays a critical role in how patients engage with research, enabling reliable data collection, improving compliance, and supporting a high‑quality trial experience. In this role, you will lead the development of robust, scalable mobile applications using C#, MVVM architecture, and modern cross‑platform frameworks such as .
NET MAUI, building on Xamarin‑based implementations where applicable. You will own key architectural decisions across the mobile platform, guide technical standards and best practices, and act as a technical reference point for mobile engineering within the R&D; organisation. What You’ll Be Doing
• Define and own the architecture for cross-platform mobile applications using .
NET MAUI, ensuring scalability, maintainability, and alignment with mobile engineering best practices.
• Lead the development of core mobile application features using C#, .
NET, and XAML, remaining hands-on with complex, performance-critical, and platform-specific components.
• Drive the migration and modernization of legacy Xamarin.
Forms applications to .
NET MAUI, establishing standards, reusable components, and modernization strategies.
• Collaborate with UX/UI teams to implement responsive, accessible, and high-performance user interfaces optimized for Android and iOS platforms.
• Oversee integration with RESTful APIs, third-party SDKs, secure local data storage solutions, and offline synchronization mechanisms.
• Establish and enforce coding standards, perform architecture and code reviews, and ensure application security, performance optimization, and stability.




• Own the end-to-end mobile application lifecycle, including CI/CD pipelines, build automation, versioning, signing, and deployment to the Apple App Store and Google Play Store.
• Mentor and guide senior and junior engineers, supporting technical decision-making and fostering a culture of engineering excellence and continuous improvement.
• Act as a key technical partner to product owners, backend teams, QA, and other stakeholders, translating business requirements into robust technical solutions. What We Look For
• Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent practical experience
• 7+ years of professional software development experience
• Hands-on experience with .
NET MAUI or advanced experience with Xamarin.
Forms, including proven migration expertise
• Strong proficiency in C#, .
NET, and XAML
• Deep understanding of MVVM, clean architecture principles, and up-to-date mobile design patterns
• Proven experience delivering production-grade Android and iOS applications
• Strong knowledge of mobile application lifecycles, threading, and platform-specific behaviors
• Experience integrating RESTful APIs, third-party services, and secure local data storage solutions
• Familiarity with CI/CD pipelines and modern DevOps practices for mobile application delivery
• Demonstrated leadership skills, with the ability to mentor engineers and guide architectural decisions
• Strong communication skills and the ability to collaborate effectively with technical and non-technical stakeholders At Clario, our purpose is to transform lives by unlocking better evidence. It’s a cause that unites and inspires us. It’s why we come to work—and how we empower our people to make a positive impact every day. Whether you're advancing clinical science, building innovative technology, or supporting our global teams, your work helps bring life-changing therapies to patients faster.

📌 Lead Mobile Application Engineer (Canada)
🏢 Clario
📍 Canada