Site Reliability Engineer
Application Administrator - Card Systems (f/m/x)
Warsaw
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For a project carried out for the banking sector, we are looking for a Card Systems Application Administrator (f/m/x). The person in this position will be responsible for maintaining and securing critical banking systems, with a particular focus on continuity, high availability, and application security. We are seeking someone with experience in administering production applications, good knowledge of the Linux environment, and expertise in clusters, monitoring, and incident handling.
Your tasks
- Administration and maintenance of critical applications operating in production environments
- Ensuring system continuity and high availability
- Monitoring systems, dashboards, and alerts and responding to irregularities
- Analyzing application and system logs and diagnosing errors, timeouts, and transaction rejections
- Monitoring data and transaction flow in an end-to-end model
- Handling and diagnosing production incidents, including high-priority incidents
- Collaboration with infrastructure, security, integration, business teams, and system vendors
- Verifying the correctness of data processing and communication between integrated systems
- Participation in changes and deployments as well as developing monitoring and technical documentation
Requirements
- Minimum 3 years of experience working with Linux operating system, especially Red Hat/CentOS
- Experience in administering critical applications
- Knowledge of high availability, cluster architecture, and operation of critical systems
- Proficiency in analyzing application, system, and transaction logs and identifying causes of failures
- Basic knowledge of TCP/IP network communication and SSL/TLS protocols
- Practical knowledge of Oracle or PostgreSQL databases
- Experience working with Bash
- Knowledge of application and system security, including access management, certificates, and secure communication
- Ability to diagnose performance and integration issues and work with monitoring systems
- Familiarity with card systems or experience in the banking sector is an additional advantage
- Openness to hybrid work in Warsaw – 2 days a week in the office
Nice to have
- Knowledge of ISO 8583 standard
- Familiarity with the operation of payment organizations Visa and Mastercard
- Experience in administering card payment authorization systems
- Knowledge of monitoring systems (Splunk, Dynatrace, Grafana, Kibana, Zabbix) and queueing systems (Kafka, MQ, ActiveMQ, IBM MQ)
- Knowledge of PCI DSS standard
Job no. JOB-LWVNB
Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.
Benefits For You
- Great Place to Work
- Solid financial situation
- Contracts with the biggest brands
- Centre of internal trainings
- Many experts you can learn from
- Open and accessible management team
- Profit sharing
- Passion Sponsorship program
- Regular integration events and trips
- Comfortable and well-equipped offices
- MySii app
- Medical care
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