Full-Stack Developer (REF4999W)

Stack

Responsibilities

• ▹Backend development with Spring-based enterprise applications (80%)
• ▹Integration with internal and external systems via REST and SOAP
• ▹Secure API design and implementation
• ▹Production support, monitoring, and performance optimization
• ▹Occasional frontend work (JSF/React/Angular) (~20%)

Requirements

• ▹Deep knowledge of Spring Core (IoC, bean lifecycle, AOP, scopes)
• ▹Strong experience with Spring Security (authentication, authorization, OAuth2, SAML, session handling)
• ▹Solid expertise with Spring Data (JPA) and relational databases
• ▹Extensive experience designing and implementing REST and SOAP services
• ▹Strong Java knowledge (Java 11+) and enterprise application design
• ▹Strong system design skills; knowledge of core design patterns and architectural principles
• ▹Experience designing scalable, secure enterprise systems
• ▹Ability to analyze trade-offs and propose sustainable technical solutions
• ▹Real production experience maintaining enterprise applications
• ▹Ability to investigate complex production issues
• ▹Experience with monitoring and metrics tools (ELK, Grafana)
• ▹Understanding of performance tuning and troubleshooting under load
• ▹Hands-on experience with Docker
• ▹Experience deploying applications to Kubernetes
• ▹Familiarity with GitLab CI/CD pipelines
• ▹Understanding of deployment strategies and environment configuration
• ▹Strong understanding of secure coding practices
• ▹Awareness of OWASP recommendations (OWASP Top 10)
• ▹Experience implementing secure authentication and authorization flows
• ▹Understanding of common web vulnerabilities and mitigation strategies

Nice to have

• ▹Experience with AWS Cloud
• ▹Messaging systems (Kafka, JMS)
• ▹Experience with enterprise integration patterns
• ▹Frontend frameworks (React, Angular)

Soft skills

About the company

As Hungary's most attractive employer in 2025 (according to Randstad's representative survey), Deutsche Telekom IT Solutions is a subsidiary of the Deutsche Telekom Group. The company provides a wide portfolio of IT and telecommunications services with more than 5300 employees. It has hundreds of large customers, corporations in Germany and other European countries. DT-ITS received the Best in Educational Cooperation award from HIPA in 2019, and was acknowledged as the Most Ethical Multinational Company in the same year. The company continuously develops its four sites in Budapest, Debrecen, Pécs and Szeged and is looking for skilled IT professionals to join its team.