Principal Cyber Security Test Engineer

Role Introduction
We are looking for an experienced application security engineer who will champion a shift-left security philosophy by integrating automated security analysis into CI/CD pipelines, SAST scanning, GitHub Actions, and SCA. To ensure we embed security into the software development lifecycle (SDLC) across the organisation’s .NET, Java, and Node.js technology stacks. This role is also needed to run web application security assessments or penetration tests.
What You Will Do
Threat Modelling
Code reviews
Supporting engineering teams with security related design and build issues
Reviewing the results from various security code scanning tools
Reviewing CI/CD pipeline configurations
Create or amend code and generate pull requests for code fixes
Reviewing and testing AI integrations and relevant guard rails etc
Assisting other members of the team with application security related issues
Completing web and desktop security assessments
Carrying out risk assessments using the IRAM2 methodology
Attending architecture board technical reviews
Success Measures:
Number of threat models completed
Number of penetration tests completed
Number of engagements on AI and Software Engineering Projects
Number of risk assessments completed
What You Will Have
5+ years of experience in application security, software engineering, or DevSecOps.
Proven hands-on experience securing applications built with .NET, Java, and Node.js.
Demonstrable expertise administering SAST scanning at enterprise scale (multi-project, multi-language).
Experience implementing and managing SCA tooling, ideally Harness, across large codebases.
Strong working knowledge of GitHub Actions CI/CD pipelines and GitHub Advanced Security features.
Experience configuring and using IAST and RASP technologies
Deep understanding of common vulnerability classes (injection, broken access control, cryptographic failures, SSRF, etc.).
Ability to execute on web and desktop penetration tests.
Demonstrable expertise securing the embedding and implementation of AI within applications
Desirable:
Relevant certifications: CSSLP, GWEB, GWAPT, CEH, OSCP or equivalent.
Experience with additional SAST/DAST/IAST/RASP tools (Checkmarx, Snyk, Veracode, Contrast Security).
Contributions to open-source security projects or published security research.
Familiarity with regulatory frameworks (SOC 2, ISO 27001, GDPR) as they relate to application security.
Experience with Kubernetes security and service-mesh architectures.
What We Do For You
Wellbeing focused – Our people are our greatest assets, and ensuring everyone feels their best self to come to work is integral.
Annual Leave – 20 days of annual leave, plus public holidays
Employee Assistance Programme – Free advice, support, and confidential counselling available 24/7.
Personal Growth - Regardless of where you are at in your career, we’re committed to enabling your growth personally and professionally
Development Programmes – From Future Managers to Leadership Training, our development programmes help you get where you need to go
Online Learning Platform: SkillsHub! - Learning at your fingertips, anytime from anywhere. You can access our online library with relevant content for your career growth.
Life Insurance - 3x annual salary
Personal Accident Insurance - providing cover in the event of serious injury/illness.
Performance Bonus – Our Group-wide bonus scheme enables you to reap the rewards of your success
Who We Are
At OneAdvanced, we are at the forefront of delivering sector-focused technology solutions that simplify complexity, drive meaningful progress, and help build a fairer, more inclusive society.
We’re much more than a software company. We deliver SaaS workflow applications and IT services that power organisations across Education, Government, Healthcare, Legal, Manufacturing, Housing, Retail, and more.
OneAdvanced is one of the UK’s largest business software and services companies. Based in Birmingham (The Mailbox), operating across the UK, Ireland, India, and Australia.
Our secure, scalable platform, including OneAdvanced AI, our private AI service for UK organisations, powers connectivity and innovation across critical sectors. Alongside our software are our IT services, including hosting, managed services, and application modernisation.
We strive to create an inclusive workplace that drives innovation and collaboration, championing diverse perspectives and ideas. Our Environmental, Social and Governance (ESG) strategy is embedded in everything we do, guiding us to create meaningful impact for our people, our customers and the planet.
Join us and become part of a team that’s powering the world of work and making a real difference.
Learn more at www.oneadvanced.com

Work arrangement
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