Senior Mobile Developer

Role Summary 

Our client is seeking a talented and experienced Senior Mobile Developer specialising in .NET MAUI to join our cross-platform mobile development team. 

In this role, you will design, build, and maintain high-performance applications that run seamlessly on Android, iOS, from a single shared codebase. You will work closely with product managers, UX designers, and backend engineers to deliver polished, production-grade experiences to our users. You will also mentor junior developers, contribute to architectural decisions, and champion engineering best practices across the organisation. 

Main Responsibilities 

• Design, develop, and maintain cross-platform applications using .NET MAUI targeting Android, iOS. 
• Architect scalable, maintainable solutions following MVVM, Clean Architecture, and SOLID principles. 
• Implement native platform integrations and custom renderers/handlers where platform-specific behaviour is required. 
• Proficiency with platform-specific APIs on Android (Java/Kotlin interop) and iOS (Swift/Obj-C interop). 
• Collaborate with UX/UI designers to translate wireframes and mockups into responsive, accessible user interfaces. 
• Integrate RESTful APIs and backend services with robust error handling. 
• Write comprehensive unit tests, integration tests, and UI tests using xUnit, NUnit, or MSTest along with Appium or similar frameworks. 
• Optimise application performance including startup time, memory usage, rendering, and battery consumption. 
• Conduct code reviews, provide constructive feedback, and mentor junior and mid-level engineers. 
• Participate in Agile ceremonies (sprint planning, stand-ups, retrospectives) and contribute to continuous improvement initiatives. 
• Stay current with .NET MAUI releases, Xamarin migration paths, and the broader .NET ecosystem. 
• Maintain CI/CD pipelines for automated building, testing, and deployment of mobile applications. 

Qualifications & Experience 

• Bachelor’s or Master’s in Computer Science, Software Engineering, or a related field (or equivalent practical experience). 
• More than 8 years of professional software development experience with C# and the .NET ecosystem. 
• More than 5 years of hands-on experience with .NET MAUI or Xamarin.Forms (with demonstrated MAUI migration expertise). 
• Proficiency with platform-specific APIs on Android (Java/Kotlin interop) and iOS (Swift/Obj-C interop). 
• Experience consuming and integrating RESTful and/or GraphQL APIs. Solid knowledge of dependency injection, asynchronous programming (async/await), and reactive patterns. 
• Familiarity with Git-based workflows, pull request culture, and branch strategies (GitFlow, trunk-based). 
• Strong debugging, profiling, and performance-tuning skills across multiple target platforms. 
• Excellent written and verbal communication skills. 

Preferred Qualifications 

• Knowledge of platform-specific design systems (Material Design, Apple Human Interface Guidelines, Fluent Design). 
• Hands-on experience with Azure DevOps, GitHub Actions, or App Center for CI/CD. 
• Familiarity with SQLite, Realm, or other embedded databases for local data persistence. 
• Experience with accessibility standards (WCAG) and building inclusive applications. 
• Contributions to open-source .NET or MAUI community projects. 
• Relevant Microsoft certifications are a plus. 

Technology Stack

• Languages: C#, XAML, T-SQL; exposure to Kotlin/Swift a plus.
• Frameworks: .NET 8/9/10, .NET MAUI, Blazor Hybrid, ASP.NET Core.
• Architecture: MVVM, Clean Architecture, Repository Pattern.
• Tools & IDEs: Visual Studio 2022, VS Code, JetBrains Rider.
• DevOps: Azure DevOps, GitHub Actions, App Center, Docker.
• Testing: xUnit, NUnit, Appium, Moq, FluentAssertions.
• Databases: SQL Server, SQLite, Redis.