Engineer

Enterprise cybersecurity continues to evolve rapidly as financial institutions invest heavily in advanced threat detection, automation, and large-scale security analytics. This Principal Cybersecurity Engineer role in London offers senior technical leaders the opportunity to work on complex, data-driven security systems at scale while contributing to high-impact engineering direction within a global financial services organisation. The role includes visa sponsorship for eligible candidates.

The Principal Cybersecurity Engineer role focuses on designing and building next-generation security capabilities that leverage large-scale telemetry, advanced analytics, and automation. The position combines deep cybersecurity expertise with strong software engineering skills, with significant hands on coding responsibility. The role is designed for senior technical leaders who operate as individual contributors while influencing engineering strategy and technical direction.

The hiring organisation is a global financial services company with a strong focus on technology-driven security transformation. The organisation invests heavily in building modern cybersecurity infrastructure capable of handling complex threats across distributed systems.

• Design and develop advanced cybersecurity detection systems using large-scale data and telemetry.
• Build automation tools for threat detection, incident response, and security operations.
• Develop software components for anomaly detection and behavioural analytics.
• Work on cybersecurity engineering problems involving complex distributed systems.
• Create and optimise pipelines for processing and analysing security data at scale.
• Lead technical workshops and contribute to engineering best practices across teams.
• Influence architectural decisions for cybersecurity platforms and systems.
• Collaborate with security, data, and engineering teams to improve threat visibility.
• Write and maintain production grade code for security tooling and systems.
• Research and implement new approaches to cyber threat detection and prevention.

• Extensive experience in cybersecurity engineering or related fields.
• Strong software engineering skills with significant hands on coding ability.
• Experience working with security telemetry, threat detection, or analytics systems.
• Background in offensive security, security product development, or large scale engineering environments.
• Deep understanding of cybersecurity principles, threat models, and detection strategies.
• Ability to design and implement complex distributed systems.
• Experience working with data driven security or anomaly detection systems.
• Strong leadership and communication skills for technical influence.
• Ability to operate as a senior individual contributor in a high impact environment.
• Experience working in financial services or regulated environments is an advantage.

This Principal Cybersecurity Engineer role represents a rare opportunity for senior engineers who want to remain deeply technical while influencing large-scale cybersecurity systems. With exposure to advanced threat detection, engineering leadership, and high impact financial systems, the position offers significant career progression within enterprise cybersecurity and data-driven security architecture.