Senior Application Security Engineer

JR United Kingdom; Brighton; Remote; GBP 70,000 - 95,000; Full time

Job summary

A leading software supply chain company is looking for a passionate Senior Application Security Engineer based in Brighton, UK. The successful candidate will embed security across the platform and lead threat modeling and security reviews. You'll need a strong background in software development and deep application security expertise, especially with cloud environments like AWS.

Qualifications

• Background in software development, primarily a software engineer.
• Hands-on experience with various security tools.
• Experience in securing artifact systems is a plus.

Responsibilities

• Embed security across the platform from source to production.
• Lead threat modeling and security reviews.
• Perform penetration testing and extend security automation.

Skills

Application Security

Python

Threat Modeling

Penetration Testing

Cloud Security

Container Security

CI/CD

Job description

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Senior Application Security Engineer, Brighton

Client: Cloudsmith

Location: Brighton, United Kingdom

Job Category: Other

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 and infrastructure testing (ethically, please).
• 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 repetitive tasks, and occasionally create a proof of concept for fun.

You need:

• A background in software development. You’re fundamentally a software engineer. Python is essential, 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 if you’ve secured artifact systems or supply chains before.
• Additional bonus if you’ve worked with Firecracker, gVisor, or security tools like SCA and data enclaves.
• You believe security should enable, not block, engineering.
• You’re diplomatic and can collaborate with engineering teams to secure the Software Development Life Cycle (SDLC).

This job is remote on the Island of Ireland or in the UK. You must be physically located here; remote work from other countries is not permitted.

Work permit sponsorship is not available.