Senior Application Security Engineer

JR United Kingdom; Manchester; Remote; GBP 60,000 - 80,000; Full time

Job summary

A leading software supply chain company seeks a Senior Application Security Engineer in Manchester. The role involves embedding security throughout the development process, conducting penetration testing, and collaborating closely with engineering teams to enhance security in the Software Development Life Cycle. Ideal candidates will possess strong software engineering backgrounds and deep knowledge of application security principles.

Qualifications

• Deep application security knowledge.
• Hands-on experience with SAST, DAST, and securing cloud environments.
• Experience with threat modeling and developing security tools.

Responsibilities

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

Skills

Application Security Knowledge

Software Development

Penetration Testing

Threat Modeling

CI/CD Pipelines

Container Security

API Security

Infrastructure as Code (IaC)

Security Automation

Diplomatic Skills

Education

Background in Software Development

Job description

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Senior Application Security Engineer, Manchester

Client: Cloudsmith

Location: Manchester, 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 others' code, and help everyone improve their secure coding skills.
• Build tools, automate repetitive tasks, and occasionally create proof of concepts 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 securing cloud environments (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 advanced security tools like SCA and data enclaves.
• You believe security should enable, not hinder, engineering processes.
• You possess diplomatic skills to collaborate effectively with engineering teams to secure the Software Development Life Cycle (SDLC).

This position is remote within 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.