C# Developer (Tools and Installers)

ThreatLocker; Orlando (FL); On-site; USD 80,000 - 100,000; Full time

Job summary

A cybersecurity solutions company is seeking a mid-level C# Developer to design and maintain internal tools and software installers that support its products. The role requires 3–5 years of experience in software development, proficiency in C# and .NET, and knowledge of installer technologies like WiX. The candidate will collaborate with engineering, QA, and DevOps teams to enhance workflows and system usability. This position is based in Orlando, FL, with potential office travel.

Qualifications

• 3–5 years of professional software development experience.
• Proficiency in C# and .NET (Framework or .NET Core/5+).
• Hands-on experience with installer technologies (WiX preferred).

Responsibilities

• Design, develop, and maintain desktop applications using C# and .NET.
• Build and maintain software installers (e.g., MSI, EXE).
• Collaborate with DevOps and QA teams.

Skills

C#

.NET

Debugging

Problem-solving

Version Control (Git)

Attention to Detail

Communication

Tools

WiX

InstallShield

PowerShell

Job description

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 pave the market toward a secure approach of blocking application exploits.

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, while working closely with engineering, QA, and DevOps teams.

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 software development experience
• Proficiency in C# and .NET (Framework or .NET Core/5+)
• 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 concepts
• 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

• Office environment with occasional travel to company offices or property locations
• May need to stand, walk, sit, reach with hands and arms, climb or balance, stoop or kneel, talk and hear, use fingers and hands to feel objects and tools
• Occasional lifting or moving of up to 25 pounds
• Visual requirements: close vision, distance vision, depth perception, ability to adjust focus

As set forth in ThreatLocker’s Equal Employment Opportunity policy, we do not discriminate on the basis of any protected group status under any applicable law. We provide equal opportunity to qualified people with disabilities.