Harnham
Senior Application Security Engineer (198811)
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Senior Product Security Engineer
Location: London (Hybrid)
Salary: £80,000 - £100,000 (+10% bonus)
This is an opportunity to join a forward-thinking technology-driven business where security is embedded from day one. You will play a key role in shaping how products are built securely, working closely with engineering teams to influence design decisions and protect innovative, customer-facing solutions. The role offers strong technical ownership, exposure to modern cloud and AI-driven systems, and the chance to make a visible impact across the organisation.
The Company
They are a modern digital financial services organisation focused on delivering user-centric products through technology and innovation. With a strong emphasis on collaboration and continuous improvement, they have built a culture where teams are empowered to challenge conventions and deliver meaningful change. Security is treated as a core pillar of product development, not an afterthought. As part of a growing InfoSec function, you will join a team that values practical, engineering-led security approaches.
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The Role
- Embed security into the full product lifecycle, from concept through to release
- Conduct hands-on security assessments across web, mobile, and backend applications
- Lead and support threat modelling activities for new features and systems
- Collaborate closely with engineering teams to design secure architectures
- Integrate and optimise security tooling such as SAST, SCA, DAST, and vulnerability scanning
- Help drive secure development lifecycle practices across teams
- Deliver secure engineering training and guidance to developers
- Support triage and remediation of vulnerabilities from testing, tooling, and external reports
- Contribute to automation of security processes using scripts and internal tools
Your Skills & Experience
- Strong commercial experience in application or product security
- Hands-on experience with security testing tools such as Burp Suite, Nmap, or similar
- Solid knowledge of web or mobile security, with willingness to broaden across both
- Good understanding of networking fundamentals and operating systems
- Experience conducting threat modelling and explaining security trade-offs to stakeholders
- Ability to script and automate tasks using languages such as Python, JavaScript, or Go
- Knowledge of secure coding practices and common vulnerabilities
- Familiarity with cloud environments and infrastructure concepts
- Comfortable working closely with engineers in a collaborative environment
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What They Offer
- Opportunity to work on modern technology including cloud and AI-driven systems
- A highly collaborative environment with strong engineering partnerships
- Clear progression opportunities within a growing security function
- Investment in learning and development, including time for upskilling
How to Apply
If you are interested in building secure, scalable products in a collaborative environment, apply now to find out more.
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