Aimed at mid-to-senior level infrastructure security professionals who can operate in multi-cloud environments and thrive in a flat, hands-on team structure.
Derived from job-description analysis by Serendipath's career intelligence engine.
Original posting from Xai via Greenhouse
SpaceXAI’s mission is to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge. Our team is small, highly motivated, and focused on engineering excellence. This organization is for individuals who appreciate challenging themselves and thrive on curiosity. We operate with a flat organizational structure. All employees are expected to be hands-on and to contribute directly to the company’s mission. Leadership is given to those who show initiative and consistently deliver excellence. Work ethic and strong prioritization skills are important. All employees are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates.
ABOUT THE ROLE:
We are seeking a talented and motivated Infrastructure Security Engineer to join our security team. In this role, you will design, implement, and maintain secure cloud and hybrid infrastructure, and ensure the integrity of our cloud-native applications.
This role focuses on securing critical infrastructure across multi-cloud and hybrid environments, with work that may span platforms such as SpaceXAI, X Social, X Money and related systems. You’ll operate with an automation-first mindset: building secure foundations, hardening platforms at scale, and partnering closely with engineering teams so security is embedded in how we build and run systems—not bolted on after the fact.
RESPONSIBILITIES:
Cloud & infrastructure security
Design and implement secure cloud architectures across multiple cloud platforms (e.g., AWS, GCP, Azure)
Build and secure mission-critical applications in hybrid cloud and on-premises environments
Develop and maintain Infrastructure as Code (IaC) templates with embedded security controls
Assist with regular security assessments and audits of cloud infrastructure and services
Implement and manage cloud security tools and services (e.g., CSPM, CWPP, CASB)
Manage identities and roles effectively across cloud and hybrid environments
Monitor and remediate infrastructure to comply with regulations and best practices (e.g., PCI, NIST CSF, GDPR, HIPAA)
Platform, containers & developer enablement
Design and implement secure container standards and automation that enable frictionless developer workflows
Maintain Kubernetes security aligned with current best practices
Collaborate with development teams to ensure security best practices are integrated into CI/CD pipelines
Secure and enhance CI/CD pipelines; integrate and maintain code scanning platforms
Detection, operations & tooling
Monitor and respond to security events and incidents in cloud and hybrid environments
Maintain SIEM data pipelines needed for reliable alerting
Build, deploy, and maintain security operations infrastructure using Python, Terraform, and configuration management (e.g., Puppet)
Develop dashboards and alerts from security metrics
Develop and maintain cloud security policies, standards, and procedures
Own security projects end to end: identify issues and implement solutions
Stay current with emerging cloud security threats and mitigation strategies
BASIC QUALIFICATIONS:
Bachelor's degree in Computer Science, Cybersecurity, or a related field
3–5 years of experience in cloud security, infrastructure security, or related roles
Strong understanding of cloud security principles, compliance frameworks, and best practices
Proficiency in at least one cloud platform (AWS, GCP, or Azure) and associated security services
Proven experience securing hybrid AWS/on-premises (or multi-cloud) environments, including IAM and overall security posture
Experience with Infrastructure as Code tools (e.g., Terraform, CloudFormation)
Familiarity with containerization technologies and their security implications
Knowledge of network security concepts and protocols
Experience with scripting languages (e.g., Python, Bash) for automation and tool development
Proactive mindset with strong ownership, critical thinking, and problem-solving skills
Located in the EU/UK or willing to relocate
PREFERRED SKILLS AND EXPERIENCE:
Relevant security certifications (e.g., CCSP, CSSK, AWS Security Specialty)
Deep expertise in Kubernetes and container security
Experience with multi-cloud environments and cloud-to-cloud security
Knowledge of CI/CD best practices and tools
Familiarity with regulatory compliance requirements (e.g., GDPR, HIPAA, PCI DSS, NIST CSF)
Strong proficiency with Python, Terraform, and configuration management (e.g., Puppet)
Hands-on experience building GitHub Actions and workflows
Experience with observability and security operations tooling (e.g., Prometheus, Grafana, CloudWatch, Karma; SIEM platforms such as Wazuh)
Experience in building custom cloud security tools or integrations
Interest in leveraging AI for cloud security monitoring and automation
Contributions to open-source cloud security projects
Experience with securing AI/ML workloads in cloud environments
Experience in banking, money transmission, P2P payments, or similarly regulated financial platforms.
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Source: Xai careers (Greenhouse)