Senior Application Security Engineer

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

Job summary

A leading software supply chain company seeks a Senior Application Security Engineer to embed security measures across their cloud-native systems. The role requires a blend of software development skills, deep knowledge in application security, and an ability to work collaboratively with engineering teams. This position offers remote work opportunities within Ireland or the UK, ensuring maximum flexibility while tackling security challenges and enhancing development processes.

Qualifications

• Proficiency in Python; TypeScript is advantageous.
• Hands-on experience with SAST, DAST, RASP for cloud environments.
• Experience developing security tools and pen testing.

Responsibilities

• Embed security across the platform from source to production.
• Lead threat modeling and security reviews.
• Conduct penetration testing and security assessments.

Skills

Application Security

Python

Cloud Security

Container Security

Infrastructure as Code

CI/CD Pipelines

Threat Modeling

Penetration Testing

Security Tools Development

Education

Background in Software Development

Job description

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Senior Application Security Engineer, Liverpool

Client: Cloudsmith

Location: Liverpool, 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 security assessments 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 create a proof of concept for fun.

You need:

• A background in software development, primarily as a software engineer. Proficiency in Python and some TypeScript is advantageous.
• 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, 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 for experience with Firecracker, gVisor, or security tools like SCA and data enclaves.
• You believe security should enable, not block, engineering efforts.
• You are diplomatic and able to collaborate effectively with engineering teams to secure the SDLC, without causing disruption.

This position is remote within Ireland or the UK. You must be physically located in these regions; remote work from other countries is not permitted.

Work permit sponsorship is not available.