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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer - Security - **Company:** Harmonic, Inc. - **Location:** London, UK - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Kubernetes Security, Artificial Intelligence, Amazon Web Services, User Authentication, Microsoft Azure, Software as a Service, Cloud Computing Security, Cyber Security, Identity and Access Management, Key Management, Network Security, OAuth, OpenID, Security Assertion Markup Language (SAML), Software Engineering, Data Processing, Software Security, Backend, Production Code, Virtual Agents - **Published:** July 19, 2026 - **Apply:** https://uk.indeed.com/viewjob?jk=3bc6407bf2ae1ccd ## About the Role * 6+ years of hands-on software engineering experience, with deep specialization in security architecture rather than general backend development * Proven track record designing and personally implementing platform-level security controls in production - OAuth/OIDC/SAML, encryption, secrets and key management, multi-tenant isolation * Strong grounding in threat modeling and secure-by-design principles, applied to real architectural decisions rather than theoretical frameworks * Comfort setting technical standards that other engineers are expected to follow, with the communication skill to bring people along rather than dictate from a distance * Experience with cloud security fundamentals (AWS, GCP, or Azure) - IAM, network security, container and Kubernetes security * A track record of shipping secure, reliable, production-grade code, not just reviewing or auditing someone else's ## Description We're looking for a Senior Product Security Engineer to become the authority on our platform's security architecture - and to write the code that embodies it. You'll inherit a platform where the fundamentals of authentication and authorization, secrets and key management, encryption, and multi-tenant data isolation are already in decent shape, and your job is to sharpen, harden, and evolve them with the depth a dedicated specialist brings that a generalist team can't. Once you set a standard, the rest of engineering builds to it - that's a formal mandate, not a suggestion. You'll spend the majority of your time writing production code, not producing reports on someone else's. This is deliberately not a role for someone who wants to sit on a security team finding holes in what other people have already shipped. We want someone who'd rather build the fix into the architecture in the first place - hands-on, opinionated, and accountable for the outcome. What You'll Do * Take formal ownership of Harmonic's platform security architecture - authentication and authorization, secrets and key management, encryption at rest and in transit, and multi-tenant data isolation - and evolve it beyond what a generalist engineering team has had the focus to do * Write production code that directly hardens and extends these patterns in our core platform, not just documentation describing them * Set security engineering standards for the wider engineering team, and have the mandate to enforce them - this isn't advisory * Manage your own backlog of platform security improvements, prioritized independently of the product roadmap * Run threat modeling and architecture reviews on major new systems and integrations before they ship, so security is designed in rather than retrofitted * Partner directly with engineering leads to embed the right patterns at design time, and support them in meeting the standards you set * Keep our own security posture ahead of what our most demanding enterprise customers and their security teams expect from us * Stay current on the threat landscape relevant to AI agent security, sensitive data handling, and multi-tenant SaaS platforms, This isn't just a job - it's a chance to help define a category. We're building at the intersection of AI and security, carving out an emerging market where the rules haven't been written yet, and the people who join now will write them. ## Related Videos - [Keeping applications secure by evolving OAuth 2.0 and OpenID Connect](https://www.wearedevelopers.com/videos/100152-keeping-applications-secure-by-evolving-oauth-2-0-and-openid-connect) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Get started with securing your cloud-native Java microservices applications](https://www.wearedevelopers.com/videos/123-get-started-with-securing-your-cloud-native-java-microservices-applications) - [You can’t hack what you can’t see](https://www.wearedevelopers.com/videos/41-you-can-t-hack-what-you-can-t-see) - [Nest.js - TypeScript in the backend can also be clean](https://www.wearedevelopers.com/videos/1033-nest-js-typescript-in-the-backend-can-also-be-clean) ## Related Articles - [Events like RSAC Get You CISOs. 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