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.