Senior Software Engineer (.Net MAUI)

Sopra Steria is a listed European technology leader specializing in Consulting, Digital Services, and Software. With over 51,000 employees worldwide across Europe, North America and Asia, the Group supports organizations in driving their digital transformation and delivering sustainable business value.

In Asia Pacific, Singapore serves as the regional headquarter for Sopra Steria’s Infrastructure, Cloud and Cybersecurity services.

Description

We are seeking a talented and experienced Senior Software Engineer specializing in .NET MAUI to join our client's 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.

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

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.

Requirements

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/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.

Nice to have

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.