Database Administrator

Αbout the Job

DIAS INTERBANKING SYSTEMS S.A. launched its operations in 1989 and constitutes the national Automated Clearing House. In 2024, DIAS processed 467 million transactions, valued at €502 billion, consequently setting a new historic record for DIAS S.A. in its 36 years of operation. The Company's shareholders are the Bank of Greece and major banks. Our strategy is to develop innovative payment solutions used by everybody, like IRIS and RF/QR code payments, in cooperation with the financial ecosystem. Our services are addressed to both public and private sectors and contribute to payments modernization that strengthens the national economy.

We deliver at scale and speed and what we do is unique! Working at DIAS every day is an opportunity for you to contribute and shape the future of the electronic interbank payments.

Our employees are an integral part of the Company and the driving force behind its successful course and growth. DIAS, as a certified Great Place to work for 2022, 2024 and 2025 has created a work environment of mutual trust and respect that acknowledges and rewards contribution.

Want to be part of our evolving leading role as financial innovation hub in Greece?

Role Description

As a Database Administrator, you will be a key member of our Technical Support Division, ensuring the high availability, security, and performance of our critical database systems. You will support and optimize MS SQL Server and Oracle databases, used by real-time payment services and financial infrastructure with nationwide impact. This role requires deep technical expertise, analytical thinking, and a commitment to operational excellence, within a high-performance and regulated environment. 

Responsibilities

• Database Administration: Ensure the reliable and efficient operation of mission-critical MS SQL Server and Oracle databases across production and non-production environments, supporting high-volume financial transactions with strict availability requirements.
• Performance Optimization: Proactively analyze and fine-tune SQL queries, indexes, and overall database configurations, aiming for continuous performance enhancement and optimal resource utilization.
• Automation & Monitoring: Design, implement, and maintain automated workflows, scheduled jobs, and real-time monitoring tools that safeguard database health and contribute to operational resilience.
• Backup & Recovery: Develop and oversee robust backup, restore, high availability and disaster recovery processes to guarantee data integrity and business continuity, aligned with regulatory and internal RTO/RPO objectives.
• Security & Compliance: Apply security best practices, manage roles and access controls, and ensure all database environments meet compliance standards such as ISO 27001, GDPR, and CIS benchmarks.
• Real-Time Troubleshooting: Rapidly identify, diagnose, and resolve performance issues or disruptions, ensuring real-time availability and reliability of critical services and payment infrastructures.

Position Requirements

• Bachelor’s degree in Computer Science, Information Technology, or related field
• Minimum 4 years of professional experience as a Database Administrator (DBA) working with MS SQL & Oracle
• Strong experience in query optimization, indexing, and database performance tuning
• Hands-on experience with backup mechanisms, high availability, and disaster recovery strategies using MS SQL FCI and SQL Always ON
• Solid understanding of database security best practices, global security standards and access control (ISO 27001, CIS, etc)
• Experience in monitoring, alerting, and automation of database operations
• Familiarity with cloud platforms (AWS, Azure, Google Cloud) and modern deployment models
• Excellent command of the English language, both written and oral

Required Knowledge, Skills, and Abilities

• Strong problem-solving and root cause analysis skills
• Attention to detail and a mindset for high-quality, secure operations
• Effective communication of technical concepts to non-technical stakeholders
• Ability to work both independently and collaboratively in cross-functional teams
• Familiarity with agile environments and continuous delivery pipelines is a plus

Will be considered a plus

• Operating Systems: Hands-on experience with Windows Server operating systems, particularly in database hosting and administration environments
• Other Databases: Working knowledge of PostgreSQL or similar relational database systems, demonstrating flexibility in managing diverse database technologies
• Cloud Technologies: Familiarity with cloud-based database services (e.g. AWS RDS, Azure SQL, Google Cloud SQL), including migration, deployment, and monitoring of cloud-native or hybrid architectures
• Data Warehouse: Experience in designing and maintaining data warehouse structures and processes to support historical data retention and business intelligence reporting
• Real-Time Analytics: Ability to work with tools and platforms supporting real-time analytics, streaming data processing, or time-sensitive reporting use cases

Why Would You Enjoy Working with Us?

As a member of our team:

• You will be part of a mission-critical fintech company that plays a central role in digital payments in Greece
• You will experience a work environment built on meritocracy, transparency, and recognition
• You will participate in trainings, seminars, and certifications to continually enhance your technical and professional development
• You will gain exposure to cutting-edge technologies, while working in one of the most critical infrastructure environments in the country

What We Offer

• Competitive remuneration package
• Private health & life insurance plan for you and your family
• Children allowances
• Meal benefits
• Hybrid working model
• Training & development opportunities
• A stable, positive, and inclusive work environment

At DIAS we are proud to provide equal opportunities to everyone. We support and encourage diversity, equality, and inclusiveness. We strongly advocate and apply the approach that if someone has knowledge, integrity, courage, perseverance, but also love for the subject they deal with, they should have every opportunity to test their strengths and excel!

DIAS will be processing personal data you provide it with, in full compliance with the provisions and obligations imposed by the applicable European and domestic legislation and especially by the General Data Protection Regulation (GDPR) (EU) 2016/679. Your personal information (including indicatively personal details, CVs, contact information), that we collect, and process will be treated confidentially, will be used solely for the purposes for which you provided it.