Senior Windows Developer

Stealth Mode Startup; Redwood City (CA); On-site; USD 150,000 - 210,000; Full time

Job summary

Stealth Mode Startup in Redwood City, CA seeks a Senior Windows Developer to build high-performance desktop tools using .NET/C# with essential C++ system components. You will design AI-native endpoint management solutions, integrating Win32, WinRT, and modern Windows tech.

Candidate will collaborate with AI/ML teams, OS engineers, and security architects to deliver efficient, scalable software while keeping the agent lightweight on endpoints.

Qualifications

• Experience with engineering endpoint agents for enterprises.
• Familiarity with AI hardware acceleration using the NPU or GPU.
• Familiarity with code signing and driver development & deployment processes.
• Deep experience working with Windows telemetry, including event tracing, diagnostic pipelines, and system-level instrumentation.
• Exposure to cross-platform endpoint agents (Linux/macOS).
• Proven track record integrating AI/ML models into production systems, including agentic architectures, LLMs, and adaptive workflows.
• Experience leveraging AI-driven development tools to design, generate, and optimize production-grade code.

Responsibilities

• Architect and develop next generation endpoint AI framework for our sensors on Windows, enabling secure and intelligent agentic interactions across Windows environments.
• Collaborate with cross-functional teams including AI/ML scientists, OS engineers, and security architects to design and implement robust solutions.
• Define resource utilization limits and optimize solutions to provide AI powered management & security on the endpoint while maintaining our agent's lightweight footprint.
• Develop and maintain native Windows applications using Win32 API, COM, and Windows Runtime (WinRT)
• Implement native components and plugins in C++ where necessary, while focusing primarily on C#/.NET application development
• Integrate C# UI layers with high-performance C++ backends via C++/CX, C++/WinRT, or P/Invoke
• Work with Windows-specific technologies: UWP/WinAppSDK, Windows Services, Task Scheduler, Registry, GDI+/Direct2D, WIC
• Debug and profile native memory, threading, and performance issues
• Write clean, documented, and testable code following team standards
• Collaborate with senior developers on architecture and code review

Skills

C#/.NET

C++

Windows telemetry

AI/ML integration

Code signing

Driver development

Win32 API

P/Invoke

WinRT interop

Cross-platform agents

Tools

Win32 API

WinRT

C++/CX

C++/WinRT

COM

Job description

Company Description

We are a Stealth Mode Startup building a unique product experience that aims to disrupt an industry. Operating with a lean, high-impact team, the company values technical excellence, ownership, and collaborative problem-solving. Based in Redwood City, CA, the startup offers the opportunity to work closely with founders and influence core product and architectural decisions. Team members should expect a fast-paced environment, evolving challenges, and the chance to shape a product from the ground up.

Role Description

We are seeking a motivated Senior Windows Developer for a role primarily focused on .NET/C# development, with deep expertise in C++ required for system-level components. You will contribute to building high-performance desktop applications and tools using modern C#/.NET frameworks and the Win32 API. This role involves building the next generation of AI-native endpoint management & security solutions that interact deeply with the Windows OS.

Qualifications

• Experience with engineering endpoint agents for enterprises.
• Familiarity with AI hardware acceleration using the NPU or GPU.
• Familiarity with code signing and driver development & deployment processes.
• Deep experience working with Windows telemetry, including event tracing, diagnostic pipelines, and system-level instrumentation.
• Exposure to cross-platform endpoint agents (Linux/macOS).
• Proven track record integrating AI/ML models into production systems, including agentic architectures, LLMs, and adaptive workflows.
• Experience leveraging AI-driven development tools to design, generate, and optimize production-grade code.

Responsibilities

• Architect and develop next generation endpoint AI framework for our sensors on Windows, enabling secure and intelligent agentic interactions across Windows environments.
• Collaborate with cross-functional teams including AI/ML scientists, OS engineers, and security architects to design and implement robust solutions.
• Define resource utilization limits and optimize solutions to provide AI powered management & security on the endpoint while maintaining our agent's lightweight footprint.
• Develop and maintain native Windows applications using Win32 API, COM, and Windows Runtime (WinRT)
• Implement native components and plugins in C++ where necessary, while focusing primarily on C#/.NET application development
• Integrate C# UI layers with high-performance C++ backends via C++/CX, C++/WinRT, or P/Invoke
• Work with Windows-specific technologies: UWP/WinAppSDK, Windows Services, Task Scheduler, Registry, GDI+/Direct2D, WIC
• Debug and profile native memory, threading, and performance issues
• Write clean, documented, and testable code following team standards
• Collaborate with senior developers on architecture and code review