{"id":106989,"url":"https://alion.io/job/blockchain-com-infrastructure-security-engineer-2","title":"Infrastructure Security Engineer","company":{"id":4744,"name":"Blockchain.com","domain":"blockchain.com","url":"https://alion.io/company/blockchain-com","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"A","score":90,"open_postings":38,"ghost_share":0.079,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":80,"computed_at":"2026-11-02T06:13:15Z"}},"role":"Security","role_family":"Security","seniority":"senior","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Paris, France"],"countries":["FR"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":65000,"max_usd":105000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":57},"experience_years_min":4,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"CI/CD","optional":false},{"name":"CircleCI","optional":false},{"name":"Cloudflare","optional":false},{"name":"Concourse","optional":false},{"name":"GCP","optional":false},{"name":"GitHub Actions","optional":false},{"name":"Go","optional":false},{"name":"Incident Management","optional":false},{"name":"LLM","optional":false},{"name":"PagerDuty","optional":false},{"name":"Python","optional":false},{"name":"SIEM","optional":false},{"name":"Splunk","optional":false},{"name":"Terraform","optional":false},{"name":"Threat Modeling","optional":false},{"name":"Wazuh","optional":false},{"name":"CIS Benchmarks","optional":true},{"name":"ISO 27001","optional":true},{"name":"PCI DSS","optional":true},{"name":"SOC 2","optional":true},{"name":"Vault","optional":true}],"status":"live","first_seen_at":"2026-08-21T14:24:54Z","employer_posted_date":"2026-08-24","last_verified_at":"2026-11-02T13:24:16Z","board_verified":true,"closed_at":null,"days_open":73,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":72},"description":"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.\nWe 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.\nThroughout 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.\nOur 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.\nWHAT YOU WILL DO:\nDesign, build, and implement security controls, automation, and processes across product, platform, and infrastructure environments.\nIdentify operational and technical security gaps, propose solutions, and drive engineering initiatives to close them.\nCollaborate with the SRE and engineering teams to integrate security into CI/CD pipelines, deployment workflows, and cloud-native architectures.\nBuild automated tooling and services to enforce secure configurations, detect misconfigurations, and support continuous compliance.\nAssist in threat modeling, design reviews, and architectural assessments for new and existing systems.\nContribute to internal security documentation, best practices, and developer guidance.\nParticipate in security incident response when engineering expertise or automation support is needed.\nAI-Driven Innovation: Research, architect, and safely embed cutting-edge AI utilities and Large Language Model (LLM) agents directly into our secure infrastructure.\nWHAT YOU WILL NEED:\n4+ years of experience in security engineering, platform security, or DevSecOps roles.\nHands-on experience implementing security controls and automation within cloud environments, GCP or AWS are preferred.\nProficiency in modern scripting, automation and infrastructure as code e.g. Python, Bash, Go, Terraform, or similar.\nAbility to collaborate closely with engineering teams and translate security requirements into practical, scalable solutions.\nStrong analytical and problem-solving skills, with a bias toward automation over manual workflows.\nCuriosity, ownership, and a drive to continuously improve the security posture of complex systems.\nFamiliarity with some of the following: Cloudflare (DDoS protection, WAF), OSS SIEM tools (Splunk, Elastic, etc), Incident management platforms (e.g. Incident.io, PagerDuty)\nFamiliarity with at least one of the following CI/CD systems (Github Actions, Concourse, CircleCI)\nFamiliarity with maintaining HIDS systems (Wazuh preferred).\nNICE TO HAVE\nKnowledge of security standards and governance frameworks (e.g., CIS Benchmarks, NIST, SOC2, ISO 27001, PCI DSS) and how to operationalize them.\nHands-on experience with building and maintaining a SIEM comprised of open-source and hosted components\nExperience securing consumer-facing web and iOS / Android applications\nExperience designing policies and administering Vault & other Hashicorp products.\nExperience managing security vendors\nCOMPENSATION & PERKS\nUnlimited vacation policy; work hard and take time when you need it.\nUnlimited books policy; order the technical resources you need or simply pick something up from our company library.\nApple equipment.\nFull-time salary based on experience and meaningful equity in an industry-leading company.\nRole based in our Paris office, with a mandatory in-office presence four days per week\nWork from Anywhere Policy: You can work remotely from anywhere in the world for up to 20 days per year.\nBlockchain is committed to diversity and inclusion in the workplace and is proud to be an equal opportunity employer. We prohibit discrimination and harassment of any kind based on race, religion, color, national origin, gender, gender expression, sex, sexual orientation, age, marital status, veteran status, disability status or any other characteristic protected by law. This policy applies to all employment practices within our organization, including hiring, recruiting, promotion, termination, layoff, recall, leave of absence, and apprenticeship. Blockchain makes hiring decisions based solely on qualifications, merit, and business needs at the time.\nThe personal data you provide will be used by Blockchain to process your application. 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