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Windows Service Developer

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ThreatLocker

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Location:
United States, Orlando

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

Not provided
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Job Description:

ThreatLocker is seeking a highly skilled and self-driven Windows Service Developer to join our cybersecurity engineering team. In this role, you will design, implement, and optimize high-performance background services in C#/.NET, with a strong focus on Windows OS internals. These services are critical components of ThreatLocker’s endpoint protection platform — defending systems from the inside out.

Job Responsibility:

  • Design, develop, and maintain robust Windows Services using C#/.NET, with a focus on security, performance, and reliability
  • Work with low-level Windows components, including Windows APIs, file system hooks, and network stack integration
  • Implement advanced cybersecurity features, such as privilege control, intrusion prevention, and data protection mechanisms
  • Diagnose and resolve complex issues involving system performance, concurrency, memory management, and network communication
  • Collaborate across teams to ensure services align with enterprise security and compliance standards
  • Participate in code reviews, share best practices, and contribute to a clean, maintainable codebase
  • Continuously improve service resilience, monitoring, and observability with a proactive mindset

Requirements:

  • Expert-level proficiency in C#/.NET Framework and .NET Core, including asynchronous programming and multithreading
  • Strong understanding of Windows internals: services, registry, process lifecycle, and kernel-level concepts
  • Solid grasp of network protocols (TCP/IP, HTTP/S, DNS) and experience with network control or firewall-level filtering
  • Hands-on experience with debugging and profiling tools (e.g., WinDbg, Process Monitor)
  • Familiarity with SQL Server, including stored procedures and index optimization
  • Experience designing and consuming RESTful APIs
  • Strong understanding of secure coding practices and software design patterns
  • Bachelor’s degree in Computer Science, Software Engineering, or equivalent hands-on experience

Nice to have:

  • Experience with C/C++ interop, kernel development, or Windows filter drivers
  • Proven ability to design highly concurrent, long-running Windows Services with efficient resource management
  • Familiarity with endpoint protection, EDR, or network monitoring technologies
  • Understanding of containerized environments and DevOps pipelines for service deployment
  • Hands-on experience with GitHub Actions, CI/CD pipelines, and multi-target build orchestration (.NET Framework and .NET Core)
  • Deep understanding of Windows security architecture, access control, and threat mitigation strategies
  • Microsoft or cybersecurity certifications are a strong plus

Additional Information:

Job Posted:
December 13, 2025

Work Type:
On-site work
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