Senior .NET (WPF) Developer

Skylum (https://himalayas.app/companies/skylum) empowers millions of photographers to create incredible images. Our award-winning photo editing software combines AI-powered automation with full creative control. We make editing enjoyable, easy, and accessible for everyone. You'll join an environment where growth, learning, and creativity are encouraged. Flexible schedules, trust-based workflows, and a supportive team give you everything you need to focus on your best work. 🇺🇦 Proudly Ukrainian, Skylum (https://himalayas.app/companies/skylum) stands with Ukraine through action, regularly supporting organizations that help accelerate our victory.Requirements:3-5+ years of commercial C#/.NET desktop development experience;Deep WPF expertise: Strong mastery of MVVM, data binding, custom controls, and a solid grasp of the UI thread / Dispatcher model and async programming;Real experience with .NET memory management and performance profiling - and a proven track record of fixing leaks, not just describing them;Practical exposure to native C++ interop (C++/CLI, P/Invoke, or marshaling);Solid understanding of OOP, SOLID, clean code, and a genuine code-review habit;Comfortable in Agile environment, writing clear acceptance criteria and handling corner cases;A practical, daily relationship with AI-assisted development tooling (Copilot, Cursor, etc.) to boost productivity;English strong enough to live in official documentation and deep-dive technical literature (MSDN, specs, deep-dive articles).Nice to have:Experience with Image/graphics processing, GPU, or DirectX/Direct2D;Experience with WinUI 3;A background in photo, creative, or media desktop apps;Comfort improving large legacy codebases through deliberate and safe refactoring;Native instinct for desktop pitfalls - handling leaks, permission levels, and UI-thread affinity;Photography as a hobby.Responsibilities:Architect and build high-performance features using .NET 10 and WPF, ensuring the UI remains fluid and responsive under heavy loads;Develop and optimize C++/CLI wrappers to maintain a seamless, memory-safe bridge between our .NET environment and native C++ core libraries;Profile and hunt down complex desktop issues - eliminate memory leaks, fix UI thread blockages, and resolve interop vulnerabilities;Deliberately refactor legacy modules, gradually transforming older parts of the codebase into clean, testable, and modern architecture;Conduct high-standard code reviewsLeverage modern AI-assisted tools to accelerate routine coding, unit-test generation, and documentation;Collaborate closely with the team during 2-week sprints to flesh out technical requirements, cover tricky corner cases, and estimate complex tasks.What we offerFor personal growth:A chance to work with a strong team and a unique opportunity to make substantial contributions to our award-winning photo editing tools;An educational allowance to ensure that your skills stay sharp;English, German, and Polish classes to strengthen your capabilities and widen your knowledge.For comfort:A great environment where you'll work with true professionals and amazing colleagues whom you'll call friends quickly;The choice of working remotely or in our office space located on Podil, equipped with everything you might need for productive and comfortable work.For health:Medical insurance;Twenty-one days of paid sick leave per year;For leisure:Twenty-one days of paid vacation per year;Fun times at our frequent team-building activities.What to expect when you applyAn interview with our Talent Acquisition SpecialistProfessional/technical interviewManagement interviewAnd finally, your job offer! Originally posted on Himalayas (https://himalayas.app)