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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 Infrastructure Security Engineer with a proven track record in keeping systems safe. You will play a critical role in building and providing tooling that monitors our entire stack, from supporting our consumer-facing products and our institutional offerings to ensuring that we are capable of rapidly responding to cyber attacks on our colleagues and endpoints. Throughout our company, Security is a well-established mindset that leverages novel engineering approaches - as a Senior Infrastructure Security Engineer, you will lead by example and drive technical discussions with engineering teams and influence the overall architecture of our platform. 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, build, and implement security controls, automation, and processes across product, platform, and infrastructure environments. • Identify operational and technical security gaps, propose solutions, and drive engineering initiatives to close them. • Collaborate with the SRE and engineering teams to integrate security into CI/CD pipelines, deployment workflows, and cloud-native architectures. • Build automated tooling and services to enforce secure configurations, detect misconfigurations, and support continuous compliance. • Assist in threat modeling, design reviews, and architectural assessments for new and existing systems. • Contribute to internal security documentation, best practices, and developer guidance. • Participate in security incident response when engineering expertise or automation support is needed. • AI-Driven Innovation: Research, architect, and safely embed cutting-edge AI utilities and Large Language Model (LLM) agents directly into our secure infrastructure. WHAT YOU WILL NEED: • 4+ years of experience in security engineering, platform security, or DevSecOps roles. • Hands-on experience implementing security controls and automation within cloud environments, GCP or AWS are preferred. • Proficiency in modern scripting, automation and infrastructure as code e.g. Python, Bash, Go, Terraform, or similar. • Ability to collaborate closely with engineering teams and translate security requirements into practical, scalable solutions. • Strong analytical and problem-solving skills, with a bias toward automation over manual workflows. • Curiosity, ownership, and a drive to continuously improve the security posture of complex systems. • Familiarity with some of the following: Cloudflare (DDoS protection, WAF), OSS SIEM tools (Splunk, Elastic, etc), Incident management platforms (e.g. Incident.io, PagerDuty) • Familiarity with at least one of the following CI/CD systems (Github Actions, Concourse, CircleCI) • Familiarity with maintaining HIDS systems (Wazuh preferred). NICE TO HAVE • Knowledge of security standards and governance frameworks (e.g., CIS Benchmarks, NIST, SOC2, ISO 27001, PCI DSS) and how to operationalize them. • Hands-on experience with building and maintaining a SIEM comprised of open-source and hosted components • Experience securing consumer-facing web

Infrastructure Security Engineer

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