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Senior Software Engineer, Windows/Desktop Applications - Yokohama, Japan

1 hour ago
Japan
Full-time
Senior
Software Engineer
Software Development
C# C++ CI/CD .NET
Apply Now
Speechify

Speechify

Speechify is a top-rated text to speech AI app with voice cloning and dubbing features, serving over 10 million users including students and professionals.

Internet Software & Services
51-250
Founded 2017
View All Jobs 669

Description

  • Lead the design, architecture, and development of native Windows desktop applications.
  • Define and enforce best practices for code architecture, performance, memory usage, UI responsiveness, cross-version compatibility, and maintainability.
  • Drive accessibility work by integrating and validating Windows accessibility APIs and supporting screen readers, keyboard navigation, and focus management.
  • Collaborate with product designers, UX researchers, QA, and other stakeholders on feature planning and UI/UX architecture.
  • Own the full feature lifecycle from conception and design through implementation, testing, release, and maintenance.
  • Diagnose and resolve complex bugs, performance bottlenecks, memory leaks, rendering issues, and compatibility problems.
  • Propose robust architectural and design solutions to improve the Windows platform.
  • Contribute to long-term roadmap and technical direction for the Windows product.

Requirements

  • 3+ years of experience in Windows desktop application development using Windows App SDK, WinUI, C#, and XAML.
  • Additional experience with native Windows code such as C++, Win32, WinRT, or COM is ideal.
  • Deep understanding of Windows application architecture, including interoperability between managed .NET code and native code.
  • Proven experience designing, building, and shipping production-quality desktop applications.
  • Strong experience with Windows accessibility APIs such as Microsoft UI Automation or similar.
  • Excellent software engineering fundamentals, including OOP, design patterns, data structures, algorithms, memory management, and multi-threading or asynchronous programming.
  • Experience leading technical design, mentoring engineers, conducting code reviews, and making architecture-level decisions.
  • Strong communication skills and the ability to collaborate across functions and drive consensus.
  • User-centric mindset focused on polished, intuitive, and accessible experiences.
  • Experience with automated UI testing, performance optimization, localization and globalization, telemetry and crash reporting, or CI/CD workflows is preferred.

Benefits

  • High-impact role shaping the future of the Windows product for millions of users.
  • Collaborative, flat-structure engineering culture with real ownership.
  • Opportunities to mentor others and grow into broader technical leadership roles.
  • Flexibility, autonomy, and responsibility to own features end-to-end.
  • Purpose-driven mission focused on accessible, user-centered software.
  • Remote, 100% distributed work environment.

Interested in this position?

Apply directly on the company website

Apply Now

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