System Administrator at Madiff in Warsaw, Poland

We are looking for a Middleware & Systems Administrator to join our team on a long-term engagement inside a modern payments environment.

The team operates enterprise middleware, transaction processing services and supporting platforms that demand 24/7 reliability. You will focus on system administration, optimisation and incident resolution for middleware and database-backed services supporting critical financial workloads.

What you will do

• Deploy, configure and maintain WebLogic middleware and Linux application servers
  

• Perform routine database support tasks and optimise SQL queries against Oracle databases
  

• Manage application lifecycle tasks: patching, releases, configuration changes, rollback plans
  

• Monitor systems, investigate alerts, troubleshoot incidents and apply fixes or escalate appropriately
  

• Maintain runbooks, SOPs and technical documentation for operational procedures
  

• Automate tasks using Bash/Python scripting and automation tools (Ansible, Terraform where applicable)
  

• Support backup, restore and disaster recovery procedures, including DR drills
  

• Manage certificates, keys and basic network configurations
  

• Collaborate with developers, DBAs, network and security teams on cross-domain issues
  

• Participate in on-call rota and occasional out-of-hours maintenance windows
  

• Contribute to performance tuning and capacity planning
  

Requirements

• 2–3 years’ experience administering applications or databases in production environments
  

• Hands-on experience with WebLogic administration (installation, domain management, tuning)
  

• Strong Linux (Red Hat/CentOS/Oracle Linux) skills — services, logs, package management, networking
  

• Working knowledge of Oracle DB and SQL query optimisation
  

• Good troubleshooting skills, log analysis and root-cause investigation
  

• Professional attitude to operational discipline and documentation
  

• English at a working level
  

Nice to have

• Exposure to Oracle DBA tasks (backups, tuning)
  

• Familiarity with Docker/Kubernetes
  

• Experience with Ansible, Python scripting, CI/CD for ops tasks
  

• Exposure to Prometheus, Grafana, ELK/Elastic
  

• Understanding of security & compliance in financial systems
  

• Experience with ServiceNow or other ITSM tooling
  

Benefits

• Solid, competitive salary.
  
• Work in multilingual, multinational and multicultural environment on international projects
  
• Medical care
  

I'm interested