Senior Application Security Engineer

JR United Kingdom; Bath; Remote; GBP 60,000 - 90,000; Full time

Job summary

A leading software supply chain company seeks a Senior Application Security Engineer in Bath. The ideal candidate will use their software development skills to embed security across the platform, perform penetration testing, and collaborate closely with engineering teams to secure the Software Development Life Cycle. This role offers the opportunity to work remotely within the UK and Ireland, contributing to impactful security solutions in a fast-paced environment.

Qualifications

• Background in software development with proficiency in Python and some TypeScript.
• Hands-on experience with SAST, DAST, RASP, securing cloud environments.
• Experience in penetration testing, threat modeling, and creating security tools.

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 Knowledge

Container Security

API Security

Penetration Testing

CI/CD Pipelines

Infrastructure as Code (IaC)

Cloud Security (AWS)

Software Development

Tools

CircleCI

GitHub Actions

DataDog

AWS Security Hub

Software Composition Analysis (SCA)

Job description

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Senior Application Security Engineer, Bath

Client: Cloudsmith

Location: Bath, 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 and infrastructure testing 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 others' code, and help everyone improve their secure coding skills.
• Build tools, automate repetitive tasks, and occasionally develop proof of concept exploits for fun.

You need:

• A background in software development. You are fundamentally a software engineer. Proficiency in Python and some TypeScript is beneficial.
• Deep application security knowledge.
• Hands-on experience with SAST, DAST, RASP, and securing cloud environments (preferably AWS).
• Strong understanding of container security, API security, Infrastructure as Code (IaC), and CI/CD pipelines.
• Experience with penetration testing, threat modeling, and creating security tools.
• Big bonus if you’ve secured artifact systems or supply chains before.
• Bigger bonus if you’ve worked with Firecracker, gVisor, or security tools like Software Composition Analysis (SCA) and data enclaves.
• You believe security should enable, not block, engineering.
• You’re diplomatic and can collaborate effectively with engineering teams to secure the Software Development Life Cycle (SDLC).

This job is remote but must be located on the Island of Ireland or in the UK. You cannot work remotely from another country.

Work permit sponsorship is not available.