Senior Application Security Engineer

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

Job summary

A leading software supply chain company based in Birmingham is looking for a Senior Application Security Engineer. In this role, you will enhance security measures, conduct pen-testing, and collaborate with engineering teams to foster a secure Software Development Life Cycle (SDLC). Ideal candidates will have extensive knowledge in application security, cloud environments, and have a background in software development, particularly in Python and TypeScript. You will be expected to drive security initiatives while maintaining a positive engineering experience.

Qualifications

• Background in software development, especially in Python and some TypeScript.
• Deep application security knowledge and hands-on experience with SAST, DAST, RASP.
• Strong understanding of container security, API security, and CI/CD pipelines.

Responsibilities

• Embed security across the platform from source to production.
• Architect security controls across distributed, cloud-native systems.
• Perform pen-testing on services and infrastructure ethically.

Skills

Python

TypeScript

Application Security

SAST

DAST

RASP

Cloud Security

Container Security

API Security

Infrastructure as Code (IaC)

CI/CD

Pen Testing

Threat Modeling

Security Tools Development

Job description

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Senior Application Security Engineer, Birmingham

Client: Cloudsmith

Location: Birmingham, United Kingdom

Job Category: Other

EU work permit required: Yes

Job Views: 7

Posted: 07.06.2025

Expiry Date: 22.07.2025

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 pen-testing on services and infrastructure 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, especially in Python and some TypeScript.
• 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 building security tools.
• Bonus: experience securing artifact systems or supply chains.
• Bonus: familiarity with Firecracker, gVisor, SCA, or data enclaves.
• You believe security should enable, not block, engineering.
• You are diplomatic and can work with engineering teams to secure the Software Development Life Cycle (SDLC).

This position is remote within the Island of Ireland or in the UK. Candidates must be physically located here; remote work from other countries is not permitted.

Work permit sponsorship is not available.