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

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:

• Experience with writing automated tests for UI — unit tests, integration tests, UI automation tests; familiarity with relevant testing frameworks. - Experience with performance optimization for desktop apps (memory usage, startup time, rendering performance, high-DPI support, responsiveness under load). - Experience with localization/globalization, right-to-left UI support, internationalization, accessibility for multiple regions. - Familiarity with telemetry, analytics, crash reporting, logging, and error monitoring in desktop applications. - Previous experience in shaping CI/CD workflows, release pipelines, and deployment strategies for desktop applications. - Demonstrated ability to take ownership of feature areas or modules and drive them long-term, including maintenance, refactoring, and technical debt management. What we offer

• A high-impact role: you will define architecture, shape the future of our Windows product, and directly influence what millions of users see and experience. - A collaborative, flat-structure engineering culture — you are not just a coder, but a builder and a decision-maker. - Opportunities to lead — mentor others, steer technical direction, and grow into broader technical leadership (e.g. Tech Lead, Architect). - Flexibility, autonomy, and responsibility: you define how to solve problems, own features end-to-end, and contribute to long-term product vision. - A purpose-driven mission: building software that’s reliable, accessible, and user-centered — making a real difference for people. Think you’re a good fit for this job?

Tell us more about yourself and why you're interested in the role when you apply. And don’t forget to include links to your portfolio and LinkedIn. Not looking but know someone who would make a great fit? Refer them! Speechify is committed to a diverse and inclusive workplace. Speechify does not discriminate on the basis of race, national origin, gender, gender identity, sexual orientation, protected veteran status, disability, age, or other legally protected status.