> Markdown version of [/jobs/ext/2838564-application-security-engineer](https://www.wearedevelopers.com/jobs/ext/2838564-application-security-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Application Security Engineer - **Company:** The Source - **Location:** London, UK - **Salary:** £68,000.0 - £108,000.0 - **Contract:** Permanent contract - **Skills:** JavaScript (Programming Language), Artificial Intelligence, Amazon Web Services, Application Firewall, Business Logic, Software System Penetration Testing, Microsoft Azure, C Sharp (Programming Language), Cloud Computing, Cyber Security, Continuous Integration, DevOps, Web Development, Github, Identity and Access Management, Intrusion Detection Systems, Python (Programming Language), Open Web Application Security, Windows PowerShell, Secure Coding, Software Engineering, Cloud Platform System, Software Security, Information Technology, Build Tools, Virtual Agents, Software Coding, Static Application Security Testing, Programming Languages, Dynamic Application Security Testing - **Published:** September 11, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5878315931 ## About the Role * We are looking for a cybersecurity engineer with expertise in the application security domain. * We need strong application security and web application development experience. * We need team leadership skills and the ability to join a growing Information Security team. * We need deep understanding of OWASP, CWE 25, data protection, access management, software vulnerabilities, best-practice design, and threat modelling. * We need experience working with developers to produce secure code in short time frames. * We need a Computer Science or Cyber Security degree. * We need an application development background. * We need Azure DevOps experience. * We need prior experience using AI models and cyber harnesses to support security evaluation of application and software code. * We need experience with GitHub, Copilot, Codex, OWASP Top 10 for Agentic AI, AI skills development, and security triage. * We need the ability to code in at least one programming language, such as Python, JavaScript, C#, or PowerShell. * We prefer prior experience in a large organisation or Financial Services. * We need excellent analytical skills and attention to detail. * We need a CISSP, CSSLP, CEH, OSCP, or similar certification. * We need presentation skills and the ability to explain complex solutions to a less technical audience. * We need strong interpersonal, teamwork, communication, and collaboration skills. * We need excellent written and spoken English. * We want someone passionate about developing a career in Information Security. * We want someone who is inspired by agile leadership, continuous improvement, and problem solving. ## Description * Define consistent Secure Software Development Lifecycle practices for technology projects throughout planning and delivery. * Help ensure application security vulnerabilities are mitigated to tolerable levels. * Work with software and security engineers to design, maintain, and build product security tools and services. * Act as the technical point of contact for product teams on automation, CI/CD, and Product Application Security Operations. * Use approved AI models and cyber harnesses to assess application code for business logic weaknesses, misconfiguration, and vulnerabilities. * Build tools and automation scripts that help developers consume security services delivered by the Security Engineering and Automation team. * Be responsible for security product QA and testing. * Build strong relationships with product development teams. * Run software composition analysis (SCA) tools. * Explain penetration testing findings to software engineering teams and help triage and mitigate risks. * Articulate business risk when assessing software vulnerabilities. * Continuously improve the operations of SAST, DAST, and IaC security tools. * Continuously improve the operations of Web Application Firewalls (WAF) or IDS. * Continuously improve security tooling coverage in cloud environments such as Microsoft Azure and Amazon AWS. 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