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System Administrator

Warsaw, PolandFull-timePosted Oct 9, 2026

Job description

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 Web. Logic 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 Web.

Logic 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 Service.

Now or other ITSM tooling Benefits Solid, competitive salary. Work in multilingual, multinational and multicultural environment on international projects Medical care

Description copied from Madiff's careers page. Read the full posting before you apply.

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