Senior Software Security Developer – Core Platform Services
Physicsx - London
Posted Feb 6, 2026
Benefits
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About this role
Senior Software Security Developer – Core Platform Services London About us PhysicsX is a deep-tech company with roots in numerical physics and Formula One, dedicated to accelerating hardware innovation at the speed of software. We are building an AI-driven simulation software stack for engineering and manufacturing across advanced industries. By enabling high-fidelity, multi-physics simulation through AI inference across the entire engineering lifecycle, PhysicsX unlocks new levels of optimization and automation in design, manufacturing, and operations - empowering engineers to push the boundaries of possibility. Our customers include leading innovators in Aerospace & Defense, Materials, Energy, Semiconductors, and Automotive. The Role We are recruiting for a Senior Software Security Developer within our Core Platform Services Team. You will be responsible primarily for writing secure code components that many teams will use across the business. There is a strong emphasis on authentication for this role. What you will do - Design and implement platform security features and guardrails. - Act as an SME for security for the Core Services development team. This includes mentoring, performing threat modeling, sand ecurity code reviews. - Help shape incident response procedures and vulnerability management workflows - Support the response team by validating and remediating product security vulnerabilities. - Contribute to secure coding standards and provide training/mentorship to developers What you bring to the table - 8+ years in a developer role focused with strong focus on designing and building security features - Extensive RBAC/ABAC knowledge and implementation experience - Experience with user, agent, and machine authentication
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