Solid professional experience writing C++ in a production environment
Strong working knowledge of macOS internals, frameworks, and platform APIs (e.g. NSFileProvider, FSEvents)
Proficiency in Swift and/or Objective-C for macOS-native development
Experience debugging complex, multi-threaded, or multi-process applications
Experience with software development workflows, including version control (Git), code review, and CI/CD pipelines
Experience with file sync, backup, or storage-related products
Familiarity with Windows desktop development (the x360Sync agent also has a Windows counterpart)
Exposure to cross-platform C++ codebases targeting both macOS and Windows
Experience working in an Agile/Scrum team environment
Background in developer tooling, performance profiling, or low-level system programming on macOS
Why Join the x360Sync Team
The x360Sync team works on software that businesses genuinely depend on — keeping their files safe and in sync. You won't be building another internal dashboard; your work ships to real customers and has a clear, direct impact. The team values technical rigor, honest communication, and getting things done without unnecessary ceremony. If you enjoy owning hard problems in a native desktop environment and want your expertise in C++ and macOS to be the main event rather than a footnote, this is the role for you
The Senior Software Engineer for x360Sync is responsible for designing, building, and maintaining the macOS desktop agent application that keeps critical business data in sync for thousands of customers. Working in C++, Swift, and Objective-C, you will collaborate closely with a cross-functional engineering team to deliver reliable, high-quality software — from feature development through to production support. This role requires strong technical depth, clear communication, and a genuine care for the end-user experience