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Think big, Start small, Scale fast!!!
Windows Extension Developer – Contractor
Location
Mexico
Posted
106 days ago
Salary
0
Seniority
Senior
Job Description
Windows Extension Developer – Contractor
Tech Holding
• Design and implement a Windows Cloud Files API (CF API) sync provider, including placeholder management, hydration/dehydration callbacks, and range-based partial hydration. • Build robust Windows Shell integration: overlay icons, right-click context menus, and deep Windows Explorer integration via COM. • Own Win32 and NTFS-level file system interactions, including extended attributes, reparse points, and oplocks. • Implement high-performance I/O using IOCP and Windows thread pool APIs to handle concurrent file transfers reliably. • Write and maintain COM servers and in-process shell extensions that meet Microsoft's strict reliability and compatibility requirements. • Debug complex race conditions, kernel-mode interactions, and edge cases introduced by antivirus software, Group Policy, and diverse hardware configurations. • Maintain backward compatibility across Windows 10 and Windows 11, including various enterprise and consumer SKUs. • Instrument code with ETW tracing, WPR/WPA profiling, and crash dump analysis to diagnose production issues. • Collaborate with QA to develop stress tests, fuzz tests, and automated regression suites for the sync engine. • Contribute to architecture and design reviews, set engineering standards for the Windows client codebase.
Job Requirements
- 5+ years of Windows systems programming in C++, with deep mastery of Win32 APIs, NTFS internals, and COM.
- Strong, hands-on experience with the Windows Cloud Files API (cfapi.h): placeholder files, CF_CALLBACK_TYPE hydration callbacks, pin/unpin semantics, and range-based partial hydration.
- Demonstrated expertise in Windows Shell integration: overlay icon handlers, context menu shell extensions, and Explorer namespace extensions via COM.
- Solid multithreading experience using IOCP, Windows thread pools, and synchronization primitives (events, mutexes, critical sections, slim reader/writer locks).
- Has shipped at least one production Windows sync client (cloud storage client, backup agent, or equivalent), this is non-negotiable.
Benefits
- Fully remote engagement across MX.
- Opportunity to work on high-impact client systems with real operational ownership.
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