Arkadiusz Sieczak

DevOps Engineer

LinuxPolska

• Deploying and maintaining applications on OpenShift, Kubernetes, and Google Kubernetes Engine (GKE) clusters
• Creating automation scripts for deployment and configuration management using GitLab CI and Bash
• Member of the central DevOps team at the largest bank in Poland
• Promoting and enforcing DevOps best practices across teams and projects

DevOps Engineer

PLAY

• Administering on-premises Kubernetes clusters, including upgrades and day-to-day operations
• Managing and hardening Linux systems (primarily Ubuntu) in production environments
• Operating and maintaining large-scale ELK clusters on Kubernetes (handling ~190TB of data)
• Developing automation tools and scripts using Python and Bash
• Hands-on experience with PostgreSQL database administration and optimization
• Designing and maintaining Ansible roles and playbooks for system configuration
• Implementing GitOps workflows and application delivery pipelines using Argo CD
• Monitoring infrastructure and applications using Prometheus Operator and Grafana

IT Systems Maintenance Specialist

PLAY

• Administering and optimizing ELK clusters for performance, stability, and scalability
• Managing and securing Linux environments (primarily CentOS)
• Leading the initiative to rebuild and enhance the existing ELK cluster infrastructure
• Troubleshooting complex issues and ensuring high system availability
• Designing and maintaining external monitoring clusters for critical environments
• Developing automation scripts using Python and Bash
• Creating and maintaining Ansible playbooks for system configuration and deployment
• Maintaining and supporting CRM systems in production environments

Junior IT Systems Maintenance Specialist

PLAY

• Maintaining and enhancing ELK clusters, including performance tuning and configuration adjustments
• Administering Linux systems (CentOS and RHEL) in enterprise environments
• Monitoring services and infrastructure using OP5 and Grafana
• Resolving internal client issues and service requests through JIRA
• Providing maintenance and technical support for CRM systems
• Collaborating with system vendors and Technical Project Leads on infrastructure and service improvements

Red Hat Certified OpenShift Administrator

Red Hat

Professional certification validating expertise in managing OpenShift clusters, implementing containerized applications, and ensuring platform security and reliability.

Master's Degree in Blockchain Technology in Business

Warsaw School of Information Technology (WIT)

Specialized in blockchain applications for business processes and cybersecurity. Thesis focused on implementing blockchain solutions for enhanced cybersecurity frameworks.

Engineer's Degree in Electronics & Telecommunication

Military University of Technology (WAT)

Comprehensive education in electronics, telecommunications, and computer systems. Strong foundation in system architecture and network technologies.