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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Software Engineer - **Company:** Fmr LLC - **Location:** Westlake, TX, United States (Remote available) - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** .NET Framework, A/B Testing, Application Programming Interfaces (APIs), Application Frameworks, Software Applications, Automation of Tests, Unit Testing, Microsoft Azure, C Sharp (Programming Language), Continuous Delivery, Continuous Integration, Data Structures, Software Design Patterns, DevOps, Extensible Application Markup Language, Github, Microsoft Visual Studio, Windows Presentation Foundation, Nunit, Performance Tuning, Rapid Prototyping Process, WebStorm, Xamarin, Test-Driven Development (TDD), Xunit, Data Analytics, Api Design, Programming Languages, Microservices - **Published:** September 18, 2026 - **Apply:** https://www.themuse.com/jobs/fidelityinvestments/senior-software-engineer-net-c-xaml-digital-experience ## About the Role Our teams build and contribute to Fidelity's digital presence. As a desktop developer, you will help us build the desktop user experience and the underlying platforms needed to support our digital presence. You'll work on building end to end features as part of our autonomous, cross functional teams. You'll have the opportunity to contribute to own entire features from concept to deployment working on cross-functional teams. You'll have the opportunity to contribute ideas to improve our products as well as develop your skills, learn new technologies and languages, and continue to learn. We're looking for highly motivated individuals who work well in a collaborative, iterative, and fast-paced environment. The Expertise You Have You have a passion for technology and can navigate your way across complex and rapidly-changing landscapes by staying on top of latest trends and thrive by sharing knowledge. Are a creator, a doer, and a disruptor who will help us solve real-life problems and meet real customer needs. You'll be helping us build things, taking an idea, and creating rapid prototypes that are shippable and learn from real-life feedback. Are comfortable to be a self-starter, who actively challenges status-quo, is curious and not afraid to ask Why and What if? Are experienced with the tools of the trade including a variety of modern programming languages and frameworks Care about cycle time and use CI/CD practices, tools to rapidly deploy changes to customers while minimizing risk using practices like A/B tests, blue-green deployments, and feature toggles Stay on top of Algorithms, Data Structures and Design Patterns and love the challenge of building highly scalable systems that can support thousands of transactions/sec. Have a mindset of test first development and are experienced in modern test frameworks. We believe in testing and that quality is everyone's job. Are data-driven and can measure, collect and use data to make decisions. We understand the value of intuition and the need to balance decisions accordingly. Have strong communication skills and technical expertise to drive and participate in meaningful discussions. The Skills You Bring * Strong knowledge of HTTP based APIs, Networking and how the internet works. * Strong .Net/C#/XAML based applications expertise desired * DevOps, Automated Testing and Continuous Delivery * Strong experience with application frameworks such as WPF, MAUI, Xamarin * Experience with Azure DevOps or GitHub repository/pipelines and tools * Experience with performance tuning and memory utilization of desktop applications * Comfortable with Visual Design and Rapid Prototyping * Expert at one IDE of choice (Visual Studio, WebStorm) * Unit testing and Automation Tools/Frameworks (MS Unit, NUnit, xUnit) * API Design and Development, MicroServices Architecture. ## Description Are you interested in serving the needs of millions of customers by building the best-in-class digital experience that helps them in financial planning, investing, and retirement solutions? Our chapter comprises teams that work on desktop applications and platforms like Active Trader Pro®. We're looking for product-aware engineers who are passionate, inquisitive, and responsible individuals to help us on our mission to deliver the best user experience to our customers. ## Related Videos - [pytest: Simple, rapid and fun testing with Python](https://www.wearedevelopers.com/videos/213-pytest-simple-rapid-and-fun-testing-with-python) - [Innovating Developer Tools with AI: Insights from GitHub Next](https://www.wearedevelopers.com/videos/1268-innovating-developer-tools-with-ai-insights-from-github-next) - [But, you're not Facebook](https://www.wearedevelopers.com/videos/378-but-you-re-not-facebook) - [Using code generation for test automation – the fancy way](https://www.wearedevelopers.com/videos/230-using-code-generation-for-test-automation-the-fancy-way) - [Testing .NET applications a Tool box for every developer](https://www.wearedevelopers.com/videos/704-testing-net-applications-a-tool-box-for-every-developer) - [Bringing AI Model Testing and Prompt Management to Your Codebase with GitHub Models](https://www.wearedevelopers.com/videos/1536-bringing-ai-model-testing-and-prompt-management-to-your-codebase-with-github-models) ## Related Articles - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [The 8 Best Code Testing Tools](https://www.wearedevelopers.com/magazine/402-the-8-best-code-testing-tools) - [What Are The Top Skills Required For Azure Developers?](https://www.wearedevelopers.com/magazine/77-what-are-the-top-skills-required-for-azure-developers) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift)