Senior .NET Developer (Cross-Platform Mobile)

ABOUT THE ROLE

We are looking for an experienced Senior Software Engineer to join a cross-platform mobile development team. In this role you will design, build, and maintain high-performance applications that run on Android and iOS from a single shared .NET MAUI codebase. You will work closely with product managers, UX designers, and backend engineers to deliver polished, production-grade experiences.

As a senior member of the team, you will also mentor junior developers, contribute to architectural decisions, and champion engineering best practices across the team.

KEY RESPONSIBILITIES

• Design, develop, and maintain cross-platform applications using .NET MAUI for Android and iOS.
• Architect scalable, maintainable solutions following MVVM, Clean Architecture, and SOLID principles.
• Implement native platform integrations and custom handlers where platform-specific behaviour is required.
• Collaborate with UX/UI designers to translate wireframes and mockups into responsive, accessible interfaces.
• Integrate RESTful APIs and backend services with robust error handling.
• Write comprehensive unit, integration, and UI tests using xUnit, NUnit, or MSTest together 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.
• 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.

REQUIRED QUALIFICATIONS

• Bachelor's or Master's degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience.
• 8+ years of professional software development experience with C# and the .NET ecosystem.
• 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/Objective-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 branching 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.

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