Back-end Developer

COSMOTE GLOBAL SOLUTIONS NV; Belgique; Sur place; EUR 90 000 - 120 000; Plein temps

Résumé du poste

COSMOTE Global Solutions NV in Belgium is seeking a seasoned Back-end Developer to strengthen our technology team. You will develop and maintain robust server-side applications, ensure integration with front-end components, and optimize system performance.

You will design scalable databases, implement secure coding practices, and collaborate with product managers and other developers through the full development lifecycle.

Qualifications

• Bachelor’s degree in Computer Science, Engineering, or related field.
• 13+ years of back-end development experience.
• Strong proficiency in Java 17+ and Kotlin.

Responsabilités

• Develop and maintain scalable back-end services and APIs.
• Design core business logic with data integrity and security.
• Integrate server-side logic with front-end components.
• Design and optimize databases for performance and reliability.
• Follow secure coding practices to protect data and applications.
• Code quality, versioning, testing, and documentation.
• Collaborate with product managers and developers across teams.
• Participate in architecture decisions and technology evaluations.
• Maintain up-to-date technical documentation.

Connaissances

Java

Kotlin

Vert.x

Spring Boot

Hibernate

Microservices

API-first

AS4

MongoDB

PostgreSQL

Virtuoso

OpenSearch

Docker

Kubernetes

OpenID Connect

OAuth2

TLS

Keycloak

SAST

DAST

Fortify

SonarQube

Sonatype

Dependency-Track

Maven

JIRA

Confluence

Office 365

SharePoint

English

Problem-solving

Formation

Bachelor’s Degree in Computer Science, Engineering, or related field

Outils

Docker

Kubernetes

MongoDB

PostgreSQL

OpenSearch

OpenID Connect

OAuth2

TLS

Keycloak

JIRA

Confluence

Office 365

SharePoint

Maven

Description du poste

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:

• Develop and maintain scalable back-end services and APIs.
• Implement core business logic and ensure data integrity and security.
• Integrate server-side logic with front-end components.
• Design and optimize databases for performance and reliability.
• Adopt secure coding practices to protect application and data security.
• Follow best practices for code quality, versioning, and documentation.
• Conduct code reviews, debugging, and testing to identify and resolve issues.
• Collaborate with product managers, front-end developers, and other stakeholders during the development lifecycle.
• Participate in architectural decisions and technology evaluations to improve system design.
• Maintain up-to-date technical documentation.

Requirements

• Bachelor’s Degree in Computer Science, Engineering, or a related field.
• Minimum of 13 years of professional experience in back-end development.
• Strong proficiency in Java (version 17 or above), Kotlin, vert.x, Spring Boot (WebFlux), and Hibernate.
• Experience with microservices architecture and API-driven development.
• Knowledge of integration protocols such as AS4.
• Proficient in database design and management using MongoDB, PostgreSQL, Virtuoso Triple Store, and OpenSearch.
• Hands-on experience with containerization and orchestration tools such as Docker and Kubernetes.
• Solid understanding of security frameworks including OpenID Connect, OAuth2, TLS, and Keycloak.
• Experience with security testing and dependency management tools such as SAST, DAST, Fortify, SonarQube, Sonatype, Dependency-Track, and Maven.
• Proficient with collaboration and productivity tools including JIRA, Confluence, Office 365, and SharePoint.
• Excellent problem-solving skills, with the ability to work effectively in a multicultural and international environment.
• Fluent in English (C2 level) both spoken and written.
• Strong communication skills, adaptability, and capacity to work under changing requirements.