Senior Application Security Engineer

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

Job summary

A leading software supply chain company seeks a Senior Application Security Engineer in Coventry. You will be responsible for embedding security into all stages of software delivery, leading security reviews, and improving secure coding practices. Ideal candidates should possess a strong development background, particularly in Python and security expertise, especially within cloud environments like AWS.

Qualifications

• Deep application security knowledge and hands-on experience with SAST, DAST.
• Strong understanding of container security, API security, Infrastructure as Code.
• Experience securing cloud environments, particularly AWS.

Responsibilities

• Embed security across the platform, from source to production.
• Lead threat modeling and security reviews.
• Perform ethical penetration testing on services and infrastructure.

Skills

Application Security

Python

TypeScript

Cloud Security

Penetration Testing

Threat Modeling

CI/CD

Infrastructure as Code

Education

Background in Software Development

Tools

Container Security Tools

AWS Security Hub

GitHub Actions

DataDog

Job description

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Senior Application Security Engineer, Coventry

Client: Cloudsmith

Location: Coventry, 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 on services and infrastructure (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 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 penetration testing, threat modeling, and developing security tools.
• Experience securing artifact systems or supply chains is a big plus.
• Experience with Firecracker, gVisor, or advanced security tools like SCA and data enclaves is a bonus.
• You believe security should enable, not block, engineering.
• You’re diplomatic and able to work with engineering teams to secure the Software Development Life Cycle (SDLC) without causing disruption.

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 allowed.

Work permit sponsorship is not available.