We are seeking a Senior Systems Administrator to ensure the availability, performance, scalability, and security of systems across hybrid environments with a strong emphasis on containerized infrastructure and Kubernetes orchestration. This role requires experience in high-availability production environments and a deep understanding of modern infrastructure automation, monitoring, and container operations. You will join a technology-forward payment processing company where security, compliance, and reliability are mission-critical. This role reports to the Sr. Director, Infrastructure.
- Administer and support Linux- and Windows-based systems across cloud, virtual, and on-premises environments
- Design, deploy, and maintain containerized applications using Docker and orchestrate workloads with Kubernetes
- Collaborate with DevOps and development teams to support CI/CD pipelines, automate deployments, and troubleshoot infrastructure and application issues
- Build and maintain infrastructure as code using tools like Terraform, Helm, or Ansible
- Implement and manage monitoring, alerting, and logging for containers and system services
- Lead system upgrade efforts and ensure systems are patched and compliant with industry standards
- Contribute to a culture of continuous improvement by automating repetitive tasks and workflows
- Document infrastructure, processes, and deployment procedures thoroughly and consistently
- Participate in an on-call rotation to provide after-hours support for production systems
- Assist in the planning and execution of disaster recovery and high-availability strategies
- Maintain and enhance our existing virtual environments (VMware) and cloud-based infrastructure (AWS preferred)
- Support security efforts including hardening, vulnerability mitigation, and compliance with PCI-DSS and OWASP standards
- Partner with cross-functional teams on infrastructure planning and scaling initiatives
To perform this job successfully, the individual must be able to perform each essential duty satisfactorily. The requirements listed below are representative of the knowledge, skill, and/or ability required. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions:
- Proven ability to administer, scale, and secure containerized environments (Docker, Kubernetes) in production
- Proficiency with Linux system administration, particularly RedHat/Oracle Linux
- Strong scripting and automation skills (Bash, Python, PHP, or similar)
- Familiar with cloud-native technologies, microservices, and networking in a Kubernetes context
- Experience with AWS infrastructure and services (EC2, EKS, S3, IAM, etc.) is a strong plus
- Proficient in managing and troubleshooting networking issues (TCP/IP, DNS, HTTP/S, SNMP, etc.)
- Familiarity with CI/CD tools such as Jenkins, GitLab CI, or ArgoCD
- Knowledge of web servers and proxies: Apache, Tomcat, NGINX
- Experience with load balancers, GSLB, and WAFs (Imperva, F5)
- Competent with database administration: MySQL, MongoDB, Cockroach DB and database replication
- Experience with SAN solutions (Pure Storage), VMware 7.0+, and infrastructure monitoring tools like Splunk or Graylog
- Understanding of encryption technologies (TLS, RSA, AES, etc.) and security standards (PCI DSS, OWASP)
- Strong verbal and written communication skills, with the ability to collaborate across teams
- Advanced computer skills in Word, Excel, Outlook and ability to multi-task
- Bachelor’s degree in Computer Science, Engineering, Information Systems, or equivalent experience
- 7+ years in a systems administration, infrastructure, or DevOps role supporting mission-critical systems
- 3+ years of hands-on experience managing Docker containers and Kubernetes clusters
- Experience supporting applications in regulated environments (PCI, HIPAA, etc.) is preferred
The above job description is not intended to be an all-inclusive list of duties and standards of the position. Incumbents will follow any other instructions, and perform other related duties, as assigned by their supervisor.
Equal Employment Opportunity
Bluefin provides equal employment opportunities to all employees, clients, and applicants without regard to gender, civil status, family status, sexual orientation, religion, age, disability, race (which includes a person’s colour, nationality, ethnic or national origins), or membership of the Traveller community, in accordance with the Employment Equality Acts.
