Software Engineer III

Trusted Connectivity for AI-Powered Dominance. Everfox delivers trusted connectivity to protect the world’s most critical environments and safeguard the sensitive data powering decision advantage. Built for mission-critical operations, Everfox protects what matters most by securing how data moves, how users access it, and how threats are neutralized across every domain. We enable mission speed and secure collaboration across networks, domains, and allies, while ensuring the data powering AI and advanced analytics remains trusted and protected.

We don’t just defend systems; we deliver decision dominance. Our Purpose. Protect what matters most by enabling organizations to operate security in the most complex and high-risk digital environments. Our Vision. To be the most trusted authority in high-assurance cybersecurity, enabling secure collaboration across every domain. Our Belief. Security should never limit mission success – it should enable it. Our Promise.

We deliver absolute confidence in environments where failure is not an option.

We’re hiring for a hybrid role. You’ll work on-site with your team several days each week (typically 2–3), with the specific days set by your manager. Because regular in-person collaboration is central to this job, we look for candidates who live within about 50 miles of the office. Everfox will consider reasonable accommodation as required by law.

We have an immediate need for a Software Engineer to enhance capabilities of cyber products for security-conscious government & commercial customers. The position will be responsible for developing & testing new product capabilities, software development/build tools, software test infrastructure & operational support for cross-domain products. The ideal candidate is a self-starter, working in a cohesive team environment, willing to grow & learn using many software development & operational tools to test, debug & support software for secure Linux desktop environments, IT operations/enterprise management, IP networking/routing and remote/virtual desktop deployments.

Location:

Richardson, Texas

On-site

Work Schedule:

Full Time, Monday - Friday (standard work schedule with flexibility for mission-critical requirements).

• Utilize your expertise in software development processes to guide the requirement definition, design and implementation of secure message gateways.
• Demonstrate competency working hands-on in Linux based environments.
• Develop new features and extensions to existing products using a variety of languages including Rust, C, C++, Java, and proprietary languages.
• Self-starter utilizing your Linux and scripting expertise to integrate new features and extensions into complex products.
• Leverage standard networking concepts to support the design and implementation of Cross Domain capabilities.
• Develop data inspection policies using proprietary and open-source programming languages.
• Provide technical briefings to customers and Everfox leadership as required.

• BS Computer Science, Computer Engineer, Information Security or equivalent 8+ years’ experience in software engineering, system engineering or related disciplines.
• Experience with software development in Linux environments using a variety of programming and scripting languages including Java, Python, Go, C/C++, and/or bash.
• Hands-on experience implementing TCP/IP networking & related protocols (such as HTTP, SSH, IPSEC, TLS/SSL, etc).
• Robust understanding of private and public keys and/or certificates.
• Experience with version control technologies such as Git.
• Red Hat Enterprise, Fedora or Ubuntu Linux operating systems.
• Ability to obtain Government Security Clearance if needed.

• Direct experience with Link
  16, JREAP-C, TADIL-J, USMTF, VMF and related standards and protocols.
• Experience with security design and architecture of Cross Domain solutions (CDS).
• Experience with AI coding tools such as Claude Code, Codex, Gemini or Open Code.
• Agile or Scrum development experience.
• Experience with deploying cloud technologies such as MS Azure or AWS.
• Experience with virtual desktop redisplay technologies such…