We are looking for a Senior QA Engineer to lead the validation strategy, testing execution, and automation efforts for complex, high-impact software systems. This role operates at the intersection of engineering, tools, and product delivery, ensuring that multi-component systems meet the highest standards of quality, performance, and reliability. The ideal candidate is both a technical leader and a quality champion who thrives in complex environments, excels at identifying risk, and drives scalable testing solutions through automation and AI-assisted approaches

Expectation, but not limited to:

• Leads validation for complex systems spanning multiple components and teams, defining test strategy that covers functional, regression, performance, and reliability risks. Prevents high-impact regressions through proactive planning and deep technical triage.
• Creates robust automation and test utilities that materially improve signal quality (reduced flakiness, faster triage, better coverage). Serves as a subject-matter expert who elevates team execution and release confidence.
• Utilizes AI to create automated test cases, improve current process and level up test quality.

Responsibilities will include, but not be limited to:

• Owns large feature areas or subsystems spanning multiple components, including complex interactions across runtime, tools, data, and rendering. Leads cross-team testing efforts and coordinates quality activities for major deliveries.
• Defines validation strategy for complex changes, including automation approach, performance considerations, and fidelity checks. Acts as a technical point of contact for quality risk and testability discussions.
• Own large feature areas or subsystems that span multiple components across Aechelon products, including complex interactions involving runtime, tools, data, and rendering.
• Leads validation for complex systems spanning multiple components or subsystems, coordinating quality activities across ownership boundaries.
• Define and drive validation strategies for complex or high-risk changes, including test scope, automation approach, performance considerations, and fidelity or correctness checks.
• Serve as the primary technical point of contact for quality risk assessment, testability discussions, and release readiness for owned areas.
• Provide technical guidance and mentorship to junior QA engineers, reviewing test plans, test cases, and automation contributions to ensure consistency, coverage, and effectiveness.
• Identify gaps in coverage, tooling, or process, and influence improvements that scale quality across teams and releases.
• Focus on Tool Development & AI:
• Define and drive validation strategies for complex or high-risk changes, with a strong emphasis on Python-based tool development, including test frameworks, utilities, and data-driven validation.
• Design, implement, and maintain tool and testing technology in Python that replace or significantly reduce manual testing for QA owned areas.
• Utilize AI assisted tools to improve/enhance the automation and day-to-day works.

Minimum Qualifications

• BA/BS in Computer Science or equivalent work experience
• Some experience with software testing or quality engineering
• Solid understanding of software development lifecycles
• Strong organizational, communication, and problem-solving skills
• Eligibility to work with export-controlled technology
• Practical experience applying AI tools in QA tasks

Bonus Points

• Experience testing 3D graphics or simulation software
• Python, C++, or automation scripting experience
• Experience with CI systems (Jenkins or similar)
• Experience with Jira, Perforce, Git, or similar tools
• Experience writing technical documentation
• Practical experience applying AI tools to QA tasks

Compensation and Benefits

We offer a very attractive compensation package including competitive base salary, company performance-based profit sharing, 401k, 100% employer paid health benefits.

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.