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Senior Software Security Developer – Core Platform Services

PhysicsX· Product
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Londonfull-timePosted 8mo ago

About the role

Senior-level role focused on designing, implementing and mentoring secure platform components with a strong emphasis on authentication for Core Services.

Responsibilities

  • 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, secure 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

Qualifications

  • 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

Required:Secure codingAuthentication/AuthorizationRBAC/ABACThreat modelingCI/CD / IaCPythonGo

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 - dedicated support for learning, development, and leveling up over time
  • Employee Assistance Programme (EAP)
  • Bike2Work scheme and Season ticket loan
  • Octopus EV salary sacrifice
Last updated Sep 23, 2026. Interested? Apply on the company site.

About PhysicsX

Accelerating Industrial Innovation with AI

PhysicsX is deploying AI to transform how physical systems are engineered, embedding intelligence across the entire product lifecycle, from concepting and design to manufacturing and operations.

AIIndustrial InnovationDesignManufacturingOperationsAI ToolsProduct Lifecycle
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