macOS Software Engineer (Low-level macOS Specialist)

Remote (Must have right to work in the UK)

About ThreatSpike

At ThreatSpike, we believe that every company, no matter its size, should have access to world‑class cybersecurity. Our mission is to redefine how security is delivered, making it effortless, effective, and scalable—without the usual barriers of budget, expertise, or team size. Our end‑to‑end, fully managed security platform is changing the way businesses protect themselves. With rapid deployment in just a few hours, our software‑defined security solution continuously monitors network activity, proactively identifies threats, and provides real‑time protection—all backed by a team of world‑class analysts and penetration testers. Unlike traditional models, our flexible per‑seat licensing means businesses can scale security as they grow, without being constrained by budget cycles. ThreatSpike is growing fast, and this is a rare opportunity to join at a pivotal moment. We look for high‑potential individuals who want to push themselves, take ownership, and make a real impact. If you’re ambitious, thrive in fast‑moving environments, and want to be part of a company where your work directly fuels growth, this is the place for you.

The Role

• Design, develop, and deploy innovative security solutions from the ground up, written in C++ and a custom cross‑platform scripting language.
• Contribute to low‑level development of our macOS EDR agent and its interfaces with the OS, improving feature parity against our Windows and Linux agents.
• Collaborate with cross‑functional teams to solve complex, real‑world problems and deliver high‑impact security features.
• Work on a distributed architecture processing 40+ billion events a day, ensuring our platform is secure, scalable, and high‑performing.
• Participate in the entire software development lifecycle, including requirements gathering, design, coding, testing, and deployment.
• Write clean, maintainable, and efficient code while adhering to best practices in software development.
• Engage in code reviews, mentor junior developers, and ensure the overall quality of the codebase.
• Continuously learn and adopt new technologies, staying on the cutting edge of security, software engineering, and development methodologies.
• Solve complex problems related to security, low‑level system architecture, and networking.
• Contribute to building the next‑generation security platform, which is used by businesses worldwide to prevent and mitigate cyberattacks.

First 3 Months

• Get familiar with the existing platform, tools, and systems (C++, Make, Perforce, Jira).
• Contribute to development by working on new features, bug fixes, and optimizations.
• Participate in the development process, including project planning and code reviews.
• Learn the security protocols and foundational principles behind the platform’s design.

After 12 Months

• Own significant modules of the platform, including core security features like real‑time threat detection or automated remediation.
• Improve performance and scalability of the system, ensuring it can handle increased traffic and complex use cases.
• Lead the development of new, innovative security features, contributing to both architecture and implementation.
• Mentor junior developers and help guide the team’s engineering best practices.
• Collaborate across teams to enhance and evolve the platform based on customer needs and market demands.

About You

• Demonstrable experience with C++ (required).
• Deep, demonstrable knowledge of the low‑level macOS system and demonstrable experience writing macOS System Extensions (such as DriverKit, Endpoint Security Framework, or formerly KEXTs) (required).
• Strong problem‑solving skills, with a drive to tackle complex technical challenges.
• Self‑motivated, eager to learn new technologies, and able to work independently in a fast‑paced, dynamic environment.
• Enjoys developing systems from first principles and building software from the ground up.
• Passionate about security with an understanding of security concepts and protocols.
• Familiarity with tools like Make, Perforce, and Jira is a plus.

Why Join ThreatSpike?

• Be at the forefront of cybersecurity innovation – Help build a next‑generation security platform that’s redefining the industry.
• High‑impact role – Your work will directly shape the security of thousands of companies worldwide.
• Autonomy & Growth – Enjoy the freedom to design, scale, and innovate in a fast‑moving environment with ample opportunities for learning and professional development.
• Work with cutting‑edge technologies – You’ll have the opportunity to work on complex security challenges using technologies like C++, distributed systems, a microservice‑like architecture, and more.
• Collaborate with experts – Join a team of talented engineers, security experts, and innovators who are passionate about pushing the boundaries of cybersecurity.

Company benefits:

• Support for professional growth – we encourage continuous learning through both company‑provided training and self‑driven education, including financial assistance for professional certification attainment.
• Competitive remuneration – Regular salary reviews, performance‑based incentives, and long‑term incentives.
• Fully remote role – Work from anywhere with occasional team meet‑ups and events, all expenses paid.
• Flexible work culture – We value work‑life balance and give you the autonomy to manage your schedule.
• Inclusive & innovative team – Join a forward‑thinking company where diverse perspectives and ideas are valued.

Seniority level: Entry level

Employment type: Full‑time

Job function: Engineering and Information Technology, Computer and Network Security