Senior Application Security Engineer

JR United Kingdom; Gloucester; Remote; EUR 70,000 - 90,000; Full time

Job summary

Une entreprise de chaîne d'approvisionnement logicielle recherche un ingénieur en sécurité des applications senior. Vous jouerez un rôle clé en intégrant la sécurité dans le cycle de vie du développement logiciel, en travaillant sur des défis variés allant de la sécurisation des API à l'automatisation d'outils de sécurité. Si vous aimez à la fois construire et casser des systèmes, c'est votre opportunité.

Qualifications

• Expérience en développement logiciel, notamment Python.
• Connaissances approfondies en sécurité des applications.
• Expérience en SAST, DAST, et sécurisation d'environnements cloud.

Responsibilities

• Intégrer la sécurité dans la plateforme depuis le développement jusqu'à la production.
• Conduire des tests d'intrusion et revoir la sécurité des infrastructures.
• Écrire du code sécurisé et aider à améliorer la culture de codage sécurisé.

Skills

Application Security Knowledge

Penetration Testing

API Security

Cloud Security

Software Development

CI/CD Pipelines

Container Security

Security Automation

Job description

Social network you want to login/join with:

Senior Application Security Engineer, Gloucester

Client: Cloudsmith

Location: Gloucester, 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 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 develop proof of concept exploits 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 penetration testing, threat modeling, and developing security tools.
• Big bonus if you’ve secured artifact systems or supply chains before.
• Bigger bonus if you’ve worked with Firecracker, gVisor, or security automation tools like SCA and data enclaves.
• You believe security should enable, not block, engineering.
• You’re diplomatic and able to work effectively with engineering teams to secure the Software Development Life Cycle (SDLC).

This job is remote, based on the Island of Ireland or in the UK. You need to be physically located here — remote work from outside this region is not permitted.

Work permit sponsorship is not available.