COSMOTE Global Solutions NV, a distinguished member of the OTE Group of Companies, is an ICT Systems Integrator offering a comprehensive range of ICT Solutions and Services. We are actively seeking a seasoned Back-end Developer to strengthen our innovative technology team.
In this role, you will be responsible for developing and maintaining robust server-side applications, ensuring seamless integration with front-end components, and optimizing system performance. You will collaborate with cross-functional teams to deliver scalable, secure, and efficient back-end solutions that meet business requirements.
Key Responsibilities:
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Develop and maintain scalable back-end services and APIs.
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Implement core business logic and ensure data integrity and security.
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Integrate server-side logic with front-end components.
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Design and optimize databases for performance and reliability.
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Adopt secure coding practices to protect application and data security.
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Follow best practices for code quality, versioning, and documentation.
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Conduct code reviews, debugging, and testing to identify and resolve issues.
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Collaborate with product managers, front-end developers, and other stakeholders during the development lifecycle.
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Participate in architectural decisions and technology evaluations to improve system design.
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Maintain up-to-date technical documentation.
Requirements
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Bachelor’s Degree in Computer Science, Engineering, or a related field.
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Minimum of 13 years of professional experience in back-end development.
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Strong proficiency in Java (version 17 or above), Kotlin, vert.x, Spring Boot (WebFlux), and Hibernate.
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Experience with microservices architecture and API-driven development.
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Knowledge of integration protocols such as AS4.
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Proficient in database design and management using MongoDB, PostgreSQL, Virtuoso Triple Store, and OpenSearch.
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Hands-on experience with containerization and orchestration tools such as Docker and Kubernetes.
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Solid understanding of security frameworks including OpenID Connect, OAuth2, TLS, and Keycloak.
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Experience with security testing and dependency management tools such as SAST, DAST, Fortify, SonarQube, Sonatype, Dependency-Track, and Maven.
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Proficient with collaboration and productivity tools including JIRA, Confluence, Office 365, and SharePoint.
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Excellent problem-solving skills, with the ability to work effectively in a multicultural and international environment.
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Fluent in English (C2 level) both spoken and written.
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Strong communication skills, adaptability, and capacity to work under changing requirements.
