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