Senior Application Security Engineer

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Senior Application Security Engineer, Northampton Client: Cloudsmith
Location: Northampton, United Kingdom
Job Category: Other
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EU work permit required: Yes
Job Views: 4
Posted: 31.05.2025
Expiry Date: 15.07.2025
Job Description: Some people like building things. Others like breaking them. You? You love both and more importantly, you love stopping bad actors from breaking the things you helped build. If that sounds like your vibe, we’ve got a job you’ll want to see.
This job is with the software supply chain company - securing and powering how software gets delivered everywhere.
What you'll do:
Embed security across the platform, from source to production.
Architect security controls across distributed, cloud-native systems.
Lead threat modeling and security reviews (and get people to enjoy them).
Perform penetration testing services ethically.
Extend security automation and monitoring with tools like CircleCI, GitHub Actions, DataDog, AWS Security Hub, etc.
Harden everything from container runtimes to APIs to artifact pipelines.
Write secure code, review other people’s code, and help everyone improve their secure coding skills.
Build tools, automate boring tasks, and occasionally create a proof of concept for fun.
You need:
A background in software development. You’re a software engineer at heart. Proficiency in Python and some TypeScript is a plus.
Deep application security knowledge.
Hands-on experience with SAST, DAST, RASP, and cloud security (preferably AWS).
Strong understanding of container security, API security, Infrastructure as Code (IaC), and CI/CD pipelines.
Experience with pen testing, threat modeling, and developing security tools.
Bonus points for securing artifact systems or supply chains.
Additional bonus if familiar with Firecracker, gVisor, or security tools like SCA and data enclaves.
You believe security should enable, not block, engineering.
You’re diplomatic and can work effectively with engineering teams to secure the Software Development Life Cycle (SDLC).
This role is remote within the Island of Ireland or the UK. You must be physically located here; remote work from other countries is not permitted.
Work permit sponsorship is not available.

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