Senior Software Engineer, Windows/Desktop Applications - Cologne, Germany

speechify · Colognesenior

In short

▸Desarrollar aplicaciones de escritorio nativas para Windows con C#, XAML y Windows App SDK
▸Liderar arquitectura, rendimiento y accesibilidad en aplicaciones, asegurando calidad y usabilidad
▸Destacado por ganar premios de inclusividad de Apple y Chrome, con impacto global de millones de usuarios

Fluent English required for collaboration across global teams

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What they ask for

✓3+ años en desarrollo de aplicaciones de escritorio en Windows con Windows App SDK, WinUI, C# y XAML
✓Conocimiento profundo de arquitectura de aplicaciones Windows y interoperabilidad entre .NET y código nativo
✓Experiencia comprobada en lanzamiento de aplicaciones de producción con enfoque en rendimiento y mantenibilidad
✓Dominio de APIs de accesibilidad en Windows (como Microsoft UI Automation)
✓Habilidades sólidas en fundamentos de ingeniería de software: OOP, patrones, manejo de memoria, programación asíncrona
✓Capacidad para liderar diseño técnico, mentorar a otros ingenieros y tomar decisiones arquitectónicas

Don't tick every box? That's normal — your free dossier shows your gaps and how to cover them in the interview.

Windows App SDKWinUIC#XAMLC++Win32WinRTCOMMicrosoft UI AutomationVisual Studio

Who should you write to at speechify?

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Mission The mission of Speechify is to make sure that reading is never a barrier to learning. Over 50 million people use Speechify’s text-to-speech products to turn whatever they’re reading – PDFs, books, Google Docs, news articles, websites – into audio, so they can read faster, read more, and remember more. Speechify’s text-to-speech reading products include its iOS app, Android App, Mac App, Chrome Extension, and Web App. Google recently named Speechify the Chrome Extension of the Year and Apple named Speechify its 2025 Design Award winner for Inclusivity. Today, nearly 200 people around the globe work on Speechify in a 100% distributed setting – Speechify has no office. These include frontend and backend engineers, AI research scientists, and others from Amazon, Microsoft, and Google, leading PhD programs like Stanford, high growth startups like Stripe, Vercel, Bolt, and many founders of their own companies What You’ll Do • Lead the design, architecture, and development of native Windows desktop applications using Windows App SDK, WinUI (or related UI frameworks), C#, XAML, and — when needed — C++. • Define and enforce best-practices for Windows desktop development across the codebase: code architecture, performance, memory usage, responsive UI, cross-version compatibility (Windows 10/11+), and maintainability. • Drive accessibility efforts: integrate and validate support for accessibility APIs (e.g. Microsoft UI Automation or other relevant Windows accessibility frameworks), ensure UI controls, focus management, keyboard navigation, screen-reader support, and usability for users with disabilities. • Collaborate closely with product designers, UX researchers, QA, and other stakeholders to shape feature planning, UI/UX architecture, and long-term roadmap for the Windows platform. • Take ownership of full lifecycle of features: conception → design → implementation → testing → release → maintenance. Ensure quality, reliability, and consistency across releases. • Identify, diagnose, and resolve complex bugs, performance bottlenecks, memory leaks, rendering issues, or compatibility problems — and propose robust architectural or design solutions. An ideal candidate should have Required: • 3+ in Windows desktop application development using Windows App SDK, WinUI (or similar), C#, XAML — and ideally additional experience with native Windows code (C++, Win32/WinRT/COM). • Deep understanding of Windows application architecture, including interop between managed code (.NET) and native code. • Proven track record of designing, building, and shipping production-quality desktop applications, with an emphasis on reliability, performance, scalability, and maintainability. • Strong experience with accessibility APIs on Windows (e.g. Microsoft UI Automation or similar), and a dedication to building accessible and inclusive software. • Excellent software engineering fundamentals: OOP, design patterns, data structures, algorithms, memory management, multi-threading or asynchronous programming (where relevant). • Experience leading technical design, mentoring other engineers, conducting code reviews, and making architecture-level decisions. • Strong communication skills; ability to articulate tradeoffs, collaborate with cross-functional teams, and drive consensus. • A user-centric mindset: focus on building polished, intuitive, and accessible experiences for end users. Preferred / Bonus:<

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