(Senior) Backend Developer (m/f/d) with Fullstack affinity in Bonn

Stellenbeschreibung:

On behalf of our client, we are seeking a (Senior) Backend Developer (m/f/d) with full-stack expertise for their Bonn location (including a flexible mobile office model). Our client is a leading solutions provider in the field of highly secure IT infrastructure and cryptography. In this role, your focus will be approximately 80% on backend development (Java, Spring Boot, PostgreSQL, security & network architecture), complemented by contributing to the user interface design using React. Your responsibilities will include: contributing to the further development of a central management platform for network-wide security and device management (client-server architecture based on React and Spring Boot); developing modern user interfaces in close collaboration with the UX/UI team; designing and implementing backend services, including data migration from legacy systems; software development and integration on Linux-based systems; and designing and implementing automated software tests.

Completed studies in computer science / a comparable field or comparable vocational training
Several years of solid experience in professional software development
Practical experience in agile teams (e.g., Scrum framework)
Excellent knowledge of TypeScript, JavaScript and Java
Secure use of frameworks and standards such as React, Spring Boot and REST APIs
Familiarity with development and collaboration tools ( e.g., Git, GitLab, Jira, Confluence, Linux environments, relational databases such as PostgreSQL )
Knowledge in the field of Identity & Access Management (e.g. Keycloak)
Basic understanding of network protocols and technologies (VPN, TCP/IP, routing) as well as cryptographic concepts (asymmetric encryption, certificate management)
Very good German and good English skills, both spoken and written.

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