Why this role exists
ThreatLocker raised $190M Series F on 31 Jul 2026. This role went up 9 days later.
COMPANY OVERVIEW ThreatLocker® is a leader in endpoint protection technologies, providing enterprise-level cybersecurity tools to improve the security of servers and endpoints. The ThreatLocker® platform with Application Allowlisting, Ringfencing™, Storage Control, Elevation Control, Endpoint Network Control, Configuration Management, and Operational Alert solutions are leading the cybersecurity market toward a more secure approach of blocking the exploits of application vulnerabilities. POSITION OVERVIEW: We are seeking a mid-level C# Developer to design, build, and maintain internal tools and software installers that support our products and operations. This role focuses on creating reliable, user-friendly utilities and deployment solutions that streamline workflows and improve system usability. You’ll work closely with engineering, QA, and DevOps teams to develop efficient tooling, automate processes, and ensure smooth software installation and updates. The role will be based in Orlando, FL and is an in-office position. JOB SCOPE: - Design, develop, and maintain desktop applications and internal tools using C# and .NET - Build and maintain software installers (e.g., MSI, EXE) using tools such as WiX, InstallShield, or similar - Develop automation utilities to support deployment, configuration, and diagnostics - Collaborate with DevOps and QA to improve build, release, and deployment pipelines - Troubleshoot installation issues and ensure reliable upgrade and rollback mechanisms - Write clean, maintainable, and well-documented code - Participate in code reviews and contribute to best practices - Optimize performance and reliability of tools and installer processes - Work with product teams to understand requirements and translate them into technical solutions REQUIRED QUALIFICATIONS: - 3–5 years of professional experience in software development - Strong proficiency in C# and .NET (Framework or .NET Core/5+) - Experience building Windows desktop applications (WinForms, WPF, or similar) - Hands-on experience with installer technologies (WiX preferred, or InstallShield/NSIS) - Solid understanding of Windows OS, file systems, registry, and services - Experience with version control systems (e.g., Git) - Strong debugging and problem-solving skills - Strong attention to detail, especially in reliability and edge cases - Ability to work independently and manage priorities - Good communication skills and ability to collaborate across teams - Proactive mindset toward improving processes and tooling PREFERRED QUALIFICATIONS - Experience with PowerShell or scripting for automation - Familiarity with CI/CD pipelines (Azure DevOps, GitHub Actions, Jenkins, etc.) - Knowledge of packaging and deployment best practices - Experience with MSI customization, custom actions, and upgrade strategies - Exposure to security practices related to installers and system-level tools - Basic understanding of networking or system administration concept - Experience with driver or low-level system integrations - Familiarity with virtualization or endpoint environments - Experience working on security-focused or enterprise software tools WORKING CONDITIONS: The duties described below are representative of those encountered while performing the essential functions of this position. If necessary, reasonable accommodation may be requested and will be evaluated for its relationship to the essential functions that must be performed. - Job will generally be performed in an office environment but may require travel to visit company offices and/or property locations. - While performing duties of this job, would occasionally require to stand, walk, sit, reach with hands and arms, climb or balance, stoop or kneel, talk and hear, and use fingers and hands to feel objects and tools. - Must occasionally lift and/or move up to 25 pounds. - Specific vision abilities required include close vision, distance vision, depth perceptions, and the ability to adjust focus. A background check and drug/substance screening are required after a conditional offer. Employment will proceed only upon receiving clear results from both. ThreatLocker also conducts randomized drug and substance testing approximately every 60 days, in line with the same screening standards.