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.

About the role

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).

Key Responsibilities

• 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.

Key Experience and Education Requirements

• 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 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.

Nice to Have

• Direct experience with Link16, 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 as RDP, Citrix Receiver or VMware Horizon View.

A reasonable estimate of the base salary range for this role is: $125,100.00-164,000.00 USD. The actual salary offered may vary within the range based on a candidates' unique experience, locale, and business needs. In addition to a base salary and bonus plans, Everfox offers a generous benefits package including flexible PTO, a 401k match, and contribution to healthcare coverages. Our Talent Acquisition team will provide specific information regarding bonus eligibility and benefits offerings.

Everfox is an equal employment opportunity employer and complies with all applicable federal, state, and local laws prohibiting discrimination.

Everfox does not discriminate against any employee or applicant based on race, color, religion, sex, age, national origin, disability, veteran status, marital status, medical condition, or any other category protected by applicable law.

If you are a qualified individual with a disability or a disabled veteran, you may request a reasonable accommodation if you are unable or limited in your ability to use or access the Company’s career webpage as a result of your disability.

You may request reasonable accommodations by sending an email to View email address on click.appcast.io.

Everfox is a Federal Contractor. Certain positions with Everfox require access to controlled goods and technologies subject to the International Traffic in Arms Regulations or the Export Administration Regulations. Applicants for these positions may need to be "U.S. Persons," as defined in these regulations. Generally, a "U.S. Person" is a U.S. citizen, lawful permanent resident, or an individual who has been admitted as a refugee or granted asylum. Applicants must have the right to work in the location to which you have applied.

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.