Senior Application Security Engineer

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

Job summary

A leading software supply chain company is seeking a Senior Application Security Engineer to enhance their security across distributed systems. You will be responsible for embedding security practices within the software deliverance process, ensuring that vulnerabilities are addressed and software remains secure throughout its lifecycle. The ideal candidate has a strong software engineering background, experience in application security, and is proficient with various security tools.

Qualifications

• Background in software development focusing on security.
• Deep application security knowledge with hands-on experience.
• Experience in securing cloud environments (preferably AWS).

Responsibilities

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

Skills

Python

TypeScript

Application Security

Container Security

API Security

Infrastructure as Code

CI/CD Pipelines

Tools

CircleCI

GitHub Actions

DataDog

AWS Security Hub

SAST

DAST

RASP

Job description

Social network you want to login/join with:

Senior Application Security Engineer, Warrington, Cheshire

Client: Cloudsmith

Location: Warrington, Cheshire, UK

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, 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 other people’s code, and help everyone level up their secure coding game.
• Build tools, automate boring stuff, and occasionally drop a ‘sploity’ proof of concept for fun.

You need:

• A background in software development. At your core, you’re a software engineer. Python for sure and a bit of TypeScript never hurt anyone.
• Deep application security knowledge.
• Hands-on experience with SAST, DAST, RASP, and securing cloud environments (preferably AWS).
• Strong grasp of container security, API security, Infrastructure as Code (IaC), and CI/CD pipelines.
• Experience with pen testing, threat modeling, and developing security tools.
• Big bonus if you’ve secured artifact systems or supply chains before.
• Additional bonus if you’ve worked with Firecracker, gVisor, or advanced security tools like SCA and data enclaves.
• You believe security should enable, not block, engineering.
• You’re a diplomat - you gotta work with engineering to secure the SDLC, not spook them.

This job is remote on the Island of Ireland or in the UK. You need to be physically located here - you cannot work remotely from another country.

Work permit sponsorship is not available.