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.

About the role:

Everfox is hiring Senior Software Engineer to support our team in London, UK. This role suits a strong senior software engineer who wants to go beyond writing code. You do not need a formal delivery-management background, just solid engineering and an appetite to take on more: design, architecture, coordination, planning and end-to-end delivery. Generalists are welcome. What counts is the quality of your reasoning and problem-solving and how you take on a hard challenge, not the exact languages on your CV. You will split your time between hands-on work on our cross-platform desktop and mobile apps and managing delivery across the end-point software layer of the Everfox Hardsec product line. You will shape and deliver the end-point software that gives users access to our secure browsing and VDI solution, owning its design, development and overall user experience.

The work spans Linux and Windows desktop applications and mobile apps on Android and iOS, with a focus on quality, usability and enterprise integration. You will also work closely with our testing lead on release management so that each multi-platform release ships reliably and on time.

You will help shape the roadmap, coordinate delivery across our Hardsec

solutions, and work with the stakeholders who depend on this software. The work sits on the critical path and is highly visible, directly supporting the commercial priorities of the business, so what you ship lands quickly with the people who use it.

If you enjoy owning hard technical problems end to end while keeping a team aligned and delivering, this role is for you.

Location This is a hybrid role in London, UK.

Key Responsibilities:

Engineering
• Design, implement and maintain features and components for cross-platform desktop and mobile applications, with a focus on reliable, high-quality and highly usable software.
• Write code primarily in modern C++, and work across other languages as the work requires.
• Lead the scoping, design and estimating of new software and complex integration tasks, building prototypes to de-risk the harder ones.
• Use AI tooling to improve development speed and quality.
Delivery and management
• Shape and deliver the roadmap for the end-point software, translating company and product priorities into a plan you own and drive.
• Plan and coordinate work across a small team of engineers, removing blockers and keeping momentum.
• Help coordinate delivery across our Hardsec solutions, keeping cross-team dependencies visible and managed.
• Work with Product Managers, QA, Customer Success, Account Management and other Everfox development teams: translating requirements into well-scoped technical
work, coordinating delivery, and handling integrations across teams.
Test, release and improvement
• Own release management for the software, working closely with our testing lead across both manual testing and automated test development.
• Lead the end-to-end integration and test of the software as a component, including its integrations with hardware, with end-user workflow applications on the remote side, and with enterprise infrastructure such as identity providers.
• Drive improvements in code maintainability, automation and supportability, championing code review, automated testing, stable APIs and the use of AI tooling and agentic workflows.
Technical leadership
• Provide technical leadership on projects, steering design choices, solving technical issues and guiding others on code quality and testing.
• Mentor the engineers in your team, set clear objectives, and support their development towards their longer-term goals.

Key Knowledge and Skills:

• A degree in Computer Science, Engineering, or a related technical or scientific subject.
• Experience developing complex software in modern C++ for systems software and desktop or mobile applications.
• Design and architecture experience, and the ability to solve systems-level problems with multiple complex interactions between components, including planning for failure.
• A strong grasp of core computer science concepts: concurrency, IPC, networking, security including software exploitation, performance and algorithms.
• A genuine appetite to take on delivery responsibility, even without a formal delivery management background.

Nice to have
• A proven ability to manage delivery: planning, prioritisation, and keeping stakeholders informed.
• A track record of coordinating work across more than one team and keeping cross-team dependencies under control.
• Java or Kotlin, including Android app and NDK/JNI development, and iOS development in Swift or Objective-C.
• An understanding of usability, user experience and application design.
• Experience with the Qt framework.
• CI/CD experience with tooling such as GitLab, Docker and Kubernetes, and Python for automation and testing.
• Familiarity with modern AI development tooling and agentic workflows.
• Line-management experience. The role may include line-managing one or more developers depending on team shape, but the core of the job is engineering and delivery.
• A passion for technology, shown through project work, professional roles or personal projects, and someone who enjoys technical challenges and delivering results.
• Self-motivated, flexible and adaptable, and able to cope when thrown in at the deep end.
• Understands the importance of planning, prioritization and getting work done on schedule.
• Strong interpersonal and communication skills, and the ability to collaborate with and lead others.
• Empathy, and a habit of open communication and effective feedback.
• Can own products and features independently, from inception to delivery, while bringing others along rather than delivering solo.
 

A reasonable estimate of the base salary range for this role is:

The actual salary offered may vary within the range based on a candidates' unique experience, locale, and business needs. In addition to base salary and either bonus or commission, Everfox offers a generous benefits package including competitive annual leave, pension match, PMI, dental, health cash plan, income protection, in a hybrid work environment. Our Talent Acquisition team will provide specific information regarding salary and benefits offerings.

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Don’t meet every single qualification? Studies show people are hesitant to apply if they don’t meet all requirements listed in a job posting. If there is something slightly different about your previous experience, but it otherwise aligns and you’re excited about this role, we encourage you to apply. You could be a great candidate for this or other roles on our team.

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 [email protected].

Applicants must have the right to work in the location to which you have applied.