Blockchain is connecting the world to the future of finance. As the most trusted and fastest-growing global crypto company, it helps millions of people worldwide safely access cryptocurrency. Since its inception in 2011, Blockchain has earned the trust of over 90 million wallet holders and more than 40 million verified users, facilitating over $1 trillion in crypto transactions.

We are looking for a Senior Security Engineer, Infrastructure & Reliability to lead by example and drive technical discussions across engineering teams. In this hands-on hybrid role, you will build scalable security guardrails and automation across cloud, CI/CD, and developer platforms—combining SRE and security disciplines to protect our global stack and support proactive threat defense.

Our day-to-day work is interesting and dynamic, driven by a focus on proactive threat actor identification and in-depth investigation of security issues. These practices are key to ensuring strong product security and fostering continuous, iterative improvement.

WHAT YOU WILL DO:

Design, implement, and automate security controls across GCP and our wider infrastructure, focusing on least-privilege access and leveraging Terraform, policy-as-code, and CI/CD pipelines to prevent misconfigurations, detect configuration drift, and continuously enforce security baselines.

Partner closely with SRE teams to establish cloud-native deployment workflows, enforcing explicit CI/CD gates, approval flows, artifact provenance, and build security.

Partner with SRE to harden and manage the security posture of global networking infrastructure, corporate VPN, and perimeter tooling (e.g., Cloudflare) to prevent unauthorized exposure.

Design and deploy internal tooling to support the SOC and Security Engineering teams.

Conduct threat modeling, design reviews, and architectural assessments for new and existing systems.

Maintain internal security documentation, standard operating procedures, and developer best-practice…

Advert text as supplied by the employer's job board; it may be a shortened extract.

Summary

Infrastructure Security Engineer at Blockchain (GB) Limited in London. Blockchain (GB) Limited is listed on the Home Office register of licensed sponsors (23 October 2026). Read the full job advert and apply on the employer's or job board's site. A sponsor licence means the employer is on the Home Office register. It does not mean this role is sponsored. Check with the employer. This is not immigration advice.

A sponsor licence means the employer is on the Home Office register. It does not mean this role is sponsored. Check with the employer. This is not immigration advice.

Infrastructure Security Engineer at Blockchain (GB) Limited

From the advert

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