System Administrator
MADIFF Polska · Warsaw, Masovian Voivodeship, Poland
All reasons
- Open 440 days
In its favour
- Still listed on the employer's own board
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
Skills
- WebLogic
- Linux
- SQL
- Oracle Database
- SOPS
- Bash
- Python
- Ansible
- Terraform
- Docker
- Kubernetes
- Prometheus
- Grafana
- ELK Stack
- Elastic
- ServiceNow
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