Oracle Database Administrator

About Mainstream

Mainstream is the leading cloud provider in the region, with a network of over 8 data centers across Southeast Europe.With the largest team of cloud experts in the Balkans, Mainstream provides support to clients in all stages of cloud transformation, from assessment of readiness to move to the cloud and development of a cloud strategy to migration, management and optimization of public, hybrid and multi-cloud environments.

Partnerships with global cloud leaders such as Amazon Web Services and Microsoft Azure, as well as the regional Mainstream Cloud platform, provide a wide choice of cloud solutions that, combined with the certifications and collective experience of the Mainstream teams, strengthen the business of regional and foreign companies. Over the years, Mainstream has built a reputation as a cloud partner that "unlocks new business opportunities through technology" and has earned the trust of over 300 clients.

Join us as a Database Administrator (Oracle)! You’ll have the chance to work on diverse projects, support mission-critical systems, and grow your skills while collaborating with a team of cloud experts.

Key responsibilities:

• Install, configure, maintain, and manage Oracle databases.
• Provide 24/7 support for critical production systems within SLAs.
• Perform patching and upgrades.
• Ensuring the security, performance, availability, and scalability.
• Conduct scheduled maintenance and support after-hours release deployments.
• Perform daily checks, troubleshoot issues, and respond to monitoring alerts.
• Capacity planning and management.
• Monitor database performance, identify bottlenecks & optimize queries.
• Develop and maintain backup and recovery strategies.
• Manage and monitor user access, permissions, and database security.
• Collaborating with IT infrastructure teams to resolve incidents, requests, and changes.
• Independently resolve database issues in real time and ensure end-to-end problem resolution.
• Assist in Incident Management, problem resolution and continuous improvements.
• Participate in Oracle database lifecycle discussions.
• Assist development and other teams with database-related issues and activities.
• Maintain comprehensive database documentation.

Job requirements

•  3+ years of hands-on experience as an Oracle Database Administrator
• Strong technical knowledge of Oracle databases (12c to 19c) in installation, administration, tuning, and backup & recovery.
• Knowledge of RMAN backup & recovery strategies.
• Familiarity with Linux/Unix environments.
• Familiarity with basic concepts of virtualization platforms.
• Ability to work both independently and as part of a team.
• Experience providing 24/7 support for critical production systems.
• Oracle certifications are a plus, but not required.

Key Role Skills:

Database Administration & Maintenance

• Install, configure, and manage Oracle Database versions 12c to 19c.
• Conduct regular health checks, monitoring, and proactive tuning.
• Ensuring high availability, scalability, and performance optimization.
• Handling database cloning, refreshes, and migrations.
• Performing database patching and upgrades.

Backup, Recovery & Disaster Recovery

• Managing backup & recovery strategies using RMAN.
•  Manage Disaster Recovery (DR) solutions.

Performance Tuning & Optimization

• Analyzing AWR, ADDM, ASH reports to identify performance bottlenecks.
• Optimizing SQL queries, indexes, and execution plans.

Security & Compliance

• Implementing user access controls, auditing, and security standards.

Database High Availability & Replication

• Managing Oracle RAC, ASM, and Data Guard instances.

Monitoring

• Monitoring database environments using Oracle Enterprise Manager (OEM).

Automation & Scripting

• Writing and maintaining PL/SQL scripts for automation purposes.

Nice to have:

• Experience implementing High Availability with Oracle Data Guard, ASM, and RAC.
• Experience with patching, upgrades, and database migrations.
• Experience in performance tuning using SQL tuning, AWR, ASH, and ADDM reports.

What We Offer:

• Work in a dynamic team where new ideas and open communication are highly valued.
• High potential for personal and professional development within the company.
• Continuous training through mentoring programs, internal and external training, and certifications.
• Flexibility to combine remote work with office work.
• A range of benefits including private health insurance.

If you see yourself in this description and are ready to work in a dynamic and supportive environment, apply now and become a part of our team!