Quality & Reliability

End-to-end digital transformation and tech solutions

Senior Database Solution Architect - Oracle

Database AdministrationConfirmed live in the last 24 hours

Full-timeAthens, Greece€4.5k - €4.9k

About the Job

Requirements

A bachelor's degree in Computer Science, Computer Engineering, or a related field, or equivalent professional experience.
At least 7 years of hands-on experience with Oracle Database, SQL, and PL/SQL on production systems.
Proven experience designing databases for large OLTP systems.
At least two end-to-end data migrations from legacy systems, from analysis to production.
Strong performance-tuning skills, including execution plans, indexing, AWR, and SQL Monitor.
Experience with Oracle APEX and/or ORDS.
Fluency in Greek and very good English.
Clear communication with developers and clients, and a habit of documenting work.

Responsibilities

Design logical and physical data models for new information systems and establish standards for naming, auditing, multi-tenancy, and row-level security.
Lead migrations from legacy systems, including Oracle 11g/12c, SQL Server, and older ERPs, to Oracle or PostgreSQL databases; own migration from mapping study through production cutover, including PL/SQL load packages, stage syncs, reconciliation, and character-set conversion.
Build PL/SQL packages, views, and reporting procedures; administer Oracle APEX instances and workspaces; and integrate them with external systems, identity providers, and third-party services through RESTful APIs.
Move schemas to Oracle Cloud Infrastructure Autonomous Database (ATP/ADW) and other clouds using Data Pump, and configure database links, wallets, and network ACLs with the System Architect team.
Design data warehouses and ETL with Oracle Data Integrator, and build reports in BI Publisher and Oracle Analytics Cloud.
Read execution plans, rewrite queries, and design indexes on tables with hundreds of millions of rows.
Guide developers and external partners, including on Oracle Forms-to-APEX modernization; review database code; and estimate database work for new projects.
Present technical designs to public-sector clients and write database chapters of project deliverables, including system designs, data migration plans, and technical manuals.
Provide third-level support for database, APEX, and ORDS production incidents.

Desired Qualifications

Experience with Oracle Cloud Infrastructure, including Autonomous Database, Data Pump, and cloud migrations.
Experience with Oracle Data Integrator, BI Publisher, or Oracle Analytics Cloud.
Experience modernizing Oracle Forms/Reports to APEX.
Experience with Oracle ADF or WebLogic.
Experience with SQL Server or PostgreSQL, including PL/pgSQL.
Experience using Python for data-loading tools.
Experience integrating LDAP, Active Directory, or Entra ID, and using REST and OAuth.
Oracle certifications such as OCP, APEX Developer Professional, or OCI.
Experience with public-sector projects and tender deliverables.

Senior Database Solution Architect (Oracle)

Quality & Reliability S.A. (QnR) · Athens, Greece (Hybrid) · Full-time · Posted 2026-11-03

Salary: EUR 4,500–4,900

Workplace: hybrid

Department: Operations

Description

Are you a Senior Database Solution Architect? Think bigger about your next move!

Build your future with QnR Group.

JOIN THE NEXT EUROPEAN TECHNOLOGY POWERHOUSE 🚀

Senior Database Solution Architect (Oracle) | Quality & Reliability (QnR), the parent company of QnR Group

Role overview

We are looking for a Senior Database Solution Architect to join the Back End team of Quality & Reliability (QnR). You will own the Oracle databases of large public-sector information systems, from the data model to the production cutover. The work covers data migration from legacy systems, PL/SQL and Oracle APEX development, and moving databases to Oracle Cloud Infrastructure. Developers, partners and clients will come to you for every database decision.

About QnR Group

QnR Group is a technology group with 35 years of experience, 8 companies, 4 delivery centers and 225 professionals across Greece, Belgium, Cyprus and Poland. Listed on the Athens Stock Exchange since 2000, we deliver mission-critical digital transformation projects for the public and private sector. The Group’s capabilities cover software engineering, enterprise and generative AI, cybersecurity, cloud infrastructure, SAP and ServiceNow solutions, core banking and maritime intelligence.

Requirements

What you'll work on:

Database design: Design logical and physical data models for new information systems and set the standards for naming, auditing, multi-tenancy and row-level security
Data migration: Lead migrations from legacy systems (Oracle 11g/12c, SQL Server, older ERPs) to target Oracle or PostgreSQL databases. Own data migration from the mapping study to the production cutover: PL/SQL load packages, stage syncs, reconciliation and character-set conversion
PL/SQL & Oracle APEX: Build packages, views and reporting procedures, administer APEX instances and workspaces, and integrate them with external systems, identity providers and third-party services through RESTful APIs
Oracle Cloud: Move schemas to OCI Autonomous Database (ATP/ADW) and other clouds with Data Pump, and set up DB links, wallets and network ACLs together with our System Architect team
BI & ETL: Design data warehouses and ETL with Oracle Data Integrator, and build reports in BI Publisher and Oracle Analytics Cloud
Performance: Read execution plans, rewrite queries and design indexes on tables with hundreds of millions of rows
Technical leadership: Guide developers and external partners, for example on Oracle Forms to APEX modernisation, review database code and estimate the database work of new projects
Client delivery: Present technical designs to public-sector clients and write the database chapters of project deliverables: system design, data migration plan, technical manuals
Support: Act as third-level support for database, APEX and ORDS incidents in productions

What you bring:

Bachelor’s degree in Computer Science, Computer Engineering or a related field, or equivalent professional experience
7+ years of hands-on experience with Oracle Database, SQL and PL/SQL on production systems
Proven experience designing databases for large OLTP systems
At least two end-to-end data migrations from legacy systems, from analysis to production
Strong performance tuning skills: execution plans, indexing, AWR / SQL Monitor
Experience with Oracle APEX and/or ORDS
Fluent Greek, as deliverables for our Greek public-sector clients are written in Greek, and very good English
Clear communication with developers and clients, and the habit of documenting your work

Nice to have:

Oracle Cloud Infrastructure: Autonomous Database, Data Pump, cloud migrations
Oracle Data Integrator, BI Publisher or Oracle Analytics Cloud
Oracle Forms/Reports to APEX modernisation
Oracle ADF / WebLogic
SQL Server or PostgreSQL (PL/pgSQL)
Python for data-loading tools
LDAP, Active Directory or Entra ID integration, REST and OAuth
Oracle certifications (OCP, APEX Developer Professional, OCI)
Public-sector projects and tender deliverables

Apply

Apply at Quality & Reliability S.A. (QnR)

About the Company

Quality & Reliability

End-to-end digital transformation and tech solutions

Quality & Reliability (QnR) Group is a European technology group delivering mission-critical digital transformation and advanced technology solutions across Greece, Europe and the broader EMEA region. It combines eight specialized companies into an integrated ecosystem to provide end-to-end solutions by coordinating AI, cybersecurity, cloud, ERP, IoT, asset management, maritime and defence tech for governments, financial institutions and other enterprises. It differentiates itself through strategic acquisitions, cross-company collaboration, and a focus on regulated industries that require multi-disciplinary delivery beyond single-vendor offerings. Its goal is to become a leading European technology powerhouse by acquiring, integrating, innovating and scaling to deliver lasting value, resilience and competitive advantage for clients across Europe, the Middle East and Africa.

Company size: 51-200
Company stage: Not listed
Total funding: Not listed
Headquarters: Greece
Founded: 1992

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