Senior .NET Mobile Engineer

Job Description

We’re looking for a Senior Mobile Software Engineer with deep expertise in .NET mobile development and a strong foundation in native iOS and Android development. This role focuses on delivering high-quality, performant mobile applications using .NET (C#) while leveraging platform capabilities to ensure the best possible user experience. You’ll work on apps used by millions, driving feature implementation, architecture, and platform-level decisions.Responsibilities

• Design, build, and maintain mobile applications using .NET for iOS and Android.
• Collaborate across disciplines (product, design, backend) to deliver high-impact mobile experiences.
• Write high-quality C# code and contribute to native platform code in Swift (iOS) and Kotlin/Java (Android) as needed.
• Lead integration efforts with native SDKs, custom UI components, and low-level platform features.
• Guide architectural decisions balancing cross-platform efficiency with native performance and UX.
• Own debugging, profiling, and optimization for responsiveness, startup time, and resource usage.
• Create and maintain unit, integration, and automated UI tests.
• Help evolve and maintain CI/CD pipelines for reliable mobile delivery.
• Stay informed on the latest developments in .NET, iOS, and Android ecosystems and recommend adoption where beneficial.

Tech Stack

• Core: .NET for iOS and Android (C#), SDK-style .NET 8+ projects
• Native: Swift, Objective-C, Kotlin, Java
• Architectures: MVVM, Dependency Injection, async/await, multi-targeting
• Tooling: JetBrains Rider, Visual Studio, VS Code, Xcode, Android Studio, Azure DevOps, crash & performance monitoring tools
• APIs: REST, JSON, GraphQL, OAuth2

Qualifications

Qualifications

• 5+ years of mobile development experience, including:
  • Extensive experience with .NET mobile development using C#
  • Strong native iOS development experience (Swift, UIKit, Xcode)
  • Strong native Android development experience (Kotlin, Jetpack, Android Studio)
• Proven ability to integrate and maintain native SDKs and platform-specific functionality, including creating and maintaining bindings for iOS and Android libraries.
• Experience building and maintaining production apps with large user bases.
• Strong understanding of mobile app architecture, lifecycle management, and platform guidelines (App Store / Play Store).
• Solid testing practices including unit, integration, and UI automation.
• Comfortable working in a collaborative, agile team environment.
• Ability to think creatively, solve complex problems, and contribute innovative ideas that enhance product quality and user experience.
• Bonus: (Familiarity with)
  • Firebase
  • In-app purchases
  • Third-party login integrations (e.g., Google, Facebook)
  • Cross-platform frameworks such as .NET MAUI, React Native, Flutter, or Kotlin Multiplatform

Fully Remote: This position has been designated as fully remote, meaning that the position is expected to contribute from a non-NBCUniversal worksite, most commonly an employee’s residence.

• This position may require up to 10% travel for onsite collaboration and meetings at a Versant office location, based on the needs of the business.
• The final round of the interview process will be conducted in person.

#LI-remote

Additional Information

As part of our selection process, external candidates may be required to attend an in-person interview with an NBCUniversal employee at one of our locations prior to a hiring decision. NBCUniversal's policy is to provide equal employment opportunities to all applicants and employees without regard to race, color, religion, creed, gender, gender identity or expression, age, national origin or ancestry, citizenship, disability, sexual orientation, marital status, pregnancy, veteran status, membership in the uniformed services, genetic information, or any other basis protected by applicable law.

If you are a qualified individual with a disability or a disabled veteran and require support throughout the application and/or recruitment process as a result of your disability, you have the right to request a reasonable accommodation. You can submit your request to [email protected].

Although you'll be hired as an NBCU employee, your employment and the responsibilities associated with this job likely will transition to Versant in the future. By joining at this pivotal time, you'll be a part of this exciting company as it takes shape.