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About 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.
Responsibilities
- Design and implement platform security features and guardrails.
- Act as an SME for security for the Core Services development team, including mentoring, performing threat modeling, and security 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.
Requirements
- 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 workflows.
- Hands-on experience with secure coding, OWASP Top 10, and threat modeling.
- Strong developer skills and extensive experience shipping code to production.
- Experienced in CI/CD, IaC, Python and Go.
- Track record of balancing pragmatism and security rigor in a fast-paced team.
- Thorough knowledge of authentication and authorization protocols (e.g., OAuth, OpenID Connect, SAML, LDAP, etc.).
- Strong communication skills, comfortable working across development teams and managing multiple initiatives.
Skills
- Strong understanding of AI security fundamentals
- Participation in bug bounty programs
- Familiarity with the BSIMM framework
- Experience in cloud security including identity and access management and cloud-native services.
Location
- Shoreditch office
Work Type
- Hybrid
Experience Level
- Senior
Benefits
- Equity options
- 10% employer pension contribution
- Free office lunches
- Enhanced parental leave (3 months full pay paternity and 6 months full pay maternity leave)
- YellowNest nursery scheme
- 25 days of Annual Leave (+ Public Holidays)
- Private medical insurance (100% employee cover)
- Wellhub Subscription
- Eye tests
- Personal development support
- Employee Assistance Programme (EAP)
- Bike2Work scheme
- Season ticket loan
- Octopus EV salary sacrifice
About the Company
- 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.
Equal Opportunity
- We value diversity and are committed to equal employment opportunity regardless of sex, race, religion, ethnicity, nationality, disability, age, sexual orientation or gender identity.
- We strongly encourage individuals from groups traditionally underrepresented in tech to apply.
- To help make a change, we sponsor bright women from disadvantaged backgrounds through their university degrees in science and mathematics.
- We collect diversity and inclusion data solely for the purpose of monitoring the effectiveness of our equal opportunities policies and ensuring compliance with UK employment and equality legislation.
- This information is confidential, used only in aggregate form, and will not influence the outcome of your application.