Back-end Developer

COSMOTE Global Solutions, as a member of OTE Group of Companies, is an ICT Systems Integrator delivering a broad range of ICT Solutions and Services.

CGS provides a broad range of ICT Services focusing on: Cloud, Data Centre operations, Networking, Cybersecurity, BI and Data Warehouse, Big Data, Service Desk, Proactive Monitoring, Operations and Support, Service Management, Project and Programme Management, and Professional Services.

Responsibilities:

• Development of back-end website applications.
• Integration of user-facing elements developed by a front-end developer with server side logic.
• Implement core business logic.
• Creation of servers and databases for functionality.
• Design and implementation of data storage solutions.
• Understanding and implementation of security and data protection.
• Optimization of the application for maximum speed and scalability.
• Design and develop APIs.
• Participating in the design and creation of scalable software.
• Taking lead on projects, as needed.
• Maintenance of code integrity and organisation.
• Writing clean, functional code on the back-end.
• Compile and analyse data, processes, and codes to troubleshoot problems and identify areas for improvement.
• Testing and fixing bugs or other coding issues
• Meet both technical and consumer needs.
• Write technical documentation

• Bachelor’s Degree on a related field.
• At least 10 years of specific expertise in Back-end: Vert.x, Kotlin , Java (> 17) , Spring Boot (WebFlux), Hibernate.
• At least 6 years of specific expertise in Architecture & Integration: Microservices Architecture, API-driven  Development, AS4.
• At least 6 years of specific expertise in Database: MongoDB , PostgreSQL, Virtuoso Triple Store, OpenSearch.
• At least 6 years of specific expertise in Containerization & Orchestration: Docker, Kubernetes.
• At least 5 years of experience in Security: OpenID Connect, OAuth2, TLS, Keycloak.
• At least 6 years of specific expertise in Security Testing & Dependency Management: SAST, DAST, Fortify, SonarQube, Sonatype, Dependency-Track, Maven.
• At least 10 years of specific expertise in Collaboration & Productivity Tools: JIRA, Confluence, Office 365, SharePoint
• Ability to apply high quality standards to all tasks.
• Ability to participate in multi-lingual meetings, good communication skills.
• Capability of working in an international/multicultural environment, rapid self-starting capability and experience in working in a team, understanding the needs, objectives, and constraints of those in other disciplines and functions.
• Ability to adapt to unplanned changes or decisions.
• Ability to understand, speak and write in English C2.