# Full Stack Developer

> COSMOTE GLOBAL SOLUTIONS NV · Brussels, Belgium · Contract · Posted 2026-05-08

**Workplace:** on_site

## Description

**COSMOTE Global Solutions NV**, part of the OTE Group of Companies, is a leading ICT Systems Integrator offering a wide array of ICT Solutions and Services. We are committed to delivering innovative technology solutions to meet the needs of diverse clients across various industries.

We are seeking a highly skilled **Full Stack Developer** to join our dynamic team. The ideal candidate will be responsible for designing, developing, and maintaining both front-end and back-end components of web applications, ensuring seamless integration and optimal performance.

**Key Responsibilities:**

-   Design, develop, and maintain scalable web applications both on client-side and server-side.
-   Collaborate with cross-functional teams including front-end developers, back-end developers, designers, and product managers to deliver high-quality software solutions.
-   Develop user-friendly interfaces and efficient back-end logic using modern frameworks and technologies.
-   Implement APIs and services to support front-end functionalities and integrations.
-   Optimize applications for maximum speed and scalability.
-   Ensure application security and data protection best practices are followed.
-   Write clean, maintainable, and well-documented code.
-   Troubleshoot, debug, and resolve software defects and issues.
-   Participate in code reviews and contribute to continuous improvement processes.
-   Stay current with emerging technologies and industry trends to drive innovation.

## Requirements

-   Bachelor’s Degree in Computer Science, Information Technology, or related field.
-   Minimum of 5 years of professional experience as a Full Stack Developer.
-   Proficiency in backend technologies such as Java (Spring Boot), Kotlin, Vert.x, or similar frameworks.
-   Experience with front-end technologies including JavaScript, React, Angular, or Vue.js.
-   Strong understanding of RESTful APIs, microservices architecture, and API-driven development.
-   Experience with databases such as MongoDB, PostgreSQL, Virtuoso Triple Store, and OpenSearch.
-   Familiarity with containerization and orchestration tools like Docker and Kubernetes.
-   Knowledge of security standards including OpenID Connect, OAuth2, TLS, and Keycloak.
-   Experience with security testing tools and dependency management (SAST, DAST, Fortify, SonarQube, Sonatype, Dependency-Track, Maven).
-   Excellent problem-solving skills and ability to work effectively in a multicultural and multidisciplinary team environment.
-   Strong communication skills and proficiency in English (C1 or higher).
-   Familiarity with collaboration tools such as JIRA, Confluence, Office 365, and SharePoint.

## Apply

[Apply at COSMOTE GLOBAL SOLUTIONS NV](https://apply.workable.com/cosmote-global-solutions-nv/j/543F4B5549/apply)

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