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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Lead Security Engineer - **Company:** The World - **Location:** Baginton, UK - **Experience:** Expert - **Salary:** £85,451.0 - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Amazon Web Services, Software as a Service, Cloud Computing Security, Cyber Security, Information Leak Prevention, Identity and Access Management, Intrusion Detection and Prevention, Open Web Application Security, Zero Trust Network Access, Retail Software, Security Information and Event Management, Software Vulnerability Management, Large Language Models, Cloudflare, Marketplace, SentinelOne Expertise - **Published:** August 11, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5834878495 ## About the Role Identity Lifecycle: strengthening JML processes in Entra ID and key SaaS platforms Your wider remit will grow to include detection engineering, vulnerability management, AI security governance, third-party risk, and security tooling strategy - you'll help set the sequence. What We're Looking For Essential: 5+ years in security engineering or architecture, with clear progression in technical depth Hands-on delivery across at least three of: cloud security (GCP/AWS), identity and access management (Entra ID), SIEM and detection engineering, DLP, zero trust Sound judgment under uncertainty - you can make and defend security decisions with incomplete data Practical AI and automation fluency - you use it habitually to multiply your impact A track record of influencing engineering, product, and leadership stakeholders Comfortable in a small, high-trust team where you set your own direction Nice to have: Experience with Rapid7 InsightVM / InsightIDR, SentinelOne, Cloudflare, OneTrust, Microsoft Purview, or KnowBe4 Background in e-commerce, marketplace, or retail technology Familiarity with NIST CSF, ISO 27001, OWASP LLM Top 10, or similar frameworks ## Description World of Books Group UK-based | Remote / Hybrid World of Books Group Permanent, Full-time "This is a role for someone who wants to shape rather than maintain." The Opportunity World of Books Group is a certified B Corp and one of the world's largest sellers of pre-loved books, operating across the UK, US, and Hungary. Our technology estate spans cloud platforms, e-commerce marketplaces, in-house engineering, and a broad SaaS footprint - and we're looking for the person who will make it safer. As Lead Security Engineer, you'll design, build, and operate the controls that underpin our cyber resilience programme. You'll report directly to the Group Information Security Manager and work with real autonomy - shaping the roadmap, choosing the tools, and driving the engineering work that moves our security maturity forward. This is a genuinely hands-on role. You'll treat AI and automation as force multipliers, influence across IT, Engineering, Product, and Finance without holding formal authority, and leave decisions documented in a way that outlasts individuals. What You'll Focus On Your initial priorities will be: Asset and Application Visibility: establishing continuous, automated discovery and ownership of our hardware, software, cloud, and SaaS estate Zero Trust Enforcement: identity-aware access controls across remote and internal services Data Loss Prevention: phased DLP coverage against our highest-risk data flows ## Related Videos - [Fireside Chat with Cloudflare's Chief Strategy Officer, Stephanie Cohen (with Mike Butcher MBE)](https://www.wearedevelopers.com/videos/1366-fireside-chat-with-cloudflare-s-chief-strategy-officer-stephanie-cohen-with-mike-butcher-mbe) - [Launching a marketplace on-time: A lesson in taking shortcuts using spreadsheets!](https://www.wearedevelopers.com/videos/477-launching-a-marketplace-on-time-a-lesson-in-taking-shortcuts-using-spreadsheets) - [Thinking Differently - How to Make Money from Cyber Attacks & Cheats](https://www.wearedevelopers.com/videos/745-thinking-differently-how-to-make-money-from-cyber-attacks-cheats) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [Single Server, Global Reach: Running a Worldwide Marketplace on Bare Metal in a Cloud-Dominated World](https://www.wearedevelopers.com/videos/1206-single-server-global-reach-running-a-worldwide-marketplace-on-bare-metal-in-a-cloud-dominated-world) - [WebAssembly: The Next Frontier of Cloud Computing](https://www.wearedevelopers.com/videos/886-webassembly-the-next-frontier-of-cloud-computing) ## Related Articles - [Events like RSAC Get You CISOs. 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