At a Glance
- Tasks: Drive application security improvements and collaborate with engineering teams to embed security practices.
- Company: Fast-growing tech organisation prioritising security as an enabler for innovation.
- Benefits: Competitive salary, flexible working, and opportunities for professional growth.
- Other info: Join a collaborative culture that values security and offers excellent career progression.
- Why this job: Make a real impact on application security strategy while working with cutting-edge technology.
- Qualifications: Experience in application security and strong understanding of software development practices.
The predicted salary is between 60000 - 80000 £ per year.
Location: Heathrow, 2x day per month in office
Salary: If London based - £100k / If outside of London - £90k
We’re working with a fast-growing technology organisation looking for an experienced Senior Application Security Engineer to help shape how security is embedded across their engineering function. This is a hands‑on role where you’ll work closely with software engineering, platform, and product teams to improve security practices, reduce risk, and ensure applications are designed and delivered securely from day one. You’ll be joining an environment where security is treated as an enabler rather than a blocker — helping teams build better, safer products through automation, collaboration, and modern security engineering approaches.
What you’ll be doing:
- Drive improvements across application security processes, tooling, and engineering practices
- Work alongside development teams to integrate security throughout the software delivery lifecycle
- Support secure architecture decisions and provide practical guidance during design and development
- Build and improve automated security checks across CI/CD environments
- Identify application risks and help engineering teams understand and resolve vulnerabilities
- Lead threat modelling activities and support secure design reviews
- Manage and improve the effectiveness of security testing approaches and tooling
- Work with technologies covering areas such as code analysis, dependency scanning, and application testing
- Support vulnerability management activities including prioritisation and remediation planning
- Help define standards, processes, and documentation to support security maturity
- Promote a collaborative security culture across engineering teams
What we’re looking for:
- Previous experience in application security, secure software engineering, or a similar security‑focused role
- Strong understanding of software development practices and how to embed security effectively
- Knowledge of common application and API security risks, including OWASP principles
- Experience implementing security automation within modern delivery pipelines
- Hands‑on experience with security testing tools and vulnerability management processes
- Background working with cloud‑based platforms, ideally AWS environments
- Exposure to containerised applications, distributed systems, or microservice architectures
- Ability to review technical designs and influence engineering decisions
- Strong stakeholder skills with the ability to coach and collaborate with technical teams
This is a great opportunity for someone who wants to have real influence over application security strategy while remaining close to modern engineering teams and technology.
Senior Application Security Engineer (AppSec) in London employer: TrueNorth
Join a dynamic and innovative technology organisation at Heathrow, where your expertise as a Senior Application Security Engineer will be valued and impactful. With a strong emphasis on collaboration and a culture that views security as an enabler, you'll have the opportunity to drive meaningful improvements in application security while working closely with talented engineering teams. Enjoy competitive salaries, flexible working arrangements, and a commitment to employee growth and development in a fast-paced environment that embraces modern security practices.
