Senior Application Security Engineer

JR United Kingdom; Bedford; 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 posture. The role focuses on embedding security within the development lifecycle, performing ethical pentesting, and automating security processes while collaborating closely with engineering teams. The ideal candidate has a solid software development background and deep understanding of application and cloud security.

Qualifications

• Background in software development, ideally as an engineer.
• Deep application security knowledge required.
• Experience with SAST, DAST, and securing cloud environments.

Responsibilities

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

Skills

Python

TypeScript

Application Security

Cloud Security

Pen Testing

Threat Modeling

Security Automation

Tools

AWS

CircleCI

GitHub Actions

DataDog

Job description

Social network you want to login/join with:

Senior Application Security Engineer, Bedford

Client: Cloudsmith

Location: Bedford, 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 ethical pen-testing on services and infrastructure.
• 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 are fundamentally a software engineer, with experience 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, and CI/CD pipelines.
• Experience with pen testing, threat modeling, and developing security tools.
• Bonus: experience securing artifact systems or supply chains.
• Bonus: experience with Firecracker, gVisor, or security tools like SCA and data enclaves.
• You believe security should enable, not block, engineering.
• You are diplomatic and able to collaborate with engineering teams to secure the SDLC without causing disruption.

This job is remote but must be based in Ireland or the UK. You cannot work remotely from another country.

Work permit sponsorship is not available.