Location: Vienna (1–2 days on-site per week during onboarding, then 2-4 days per month; otherwise fully remote) Start: ASAP | Duration: 12 months (extension possible) Workload: 100% Language: English (must-have) + German (nice to have)
We are seeking an experienced Java Full Stack Developer with a strong focus on backend development to join our agile team.
Your role will involve designing and developing APIs, implementing microservice-based architectures, integrating with databases, and contributing to frontend development using JavaScript/TypeScript with React or Angular. You will collaborate closely with cross-functional teams in an agile environment. Experience in the telecommunications sector is a strong plus.
€350 - €400 a day
Key Responsibilities
* Design, develop, and maintain backend services using Java, Spring, and Spring Boot
* Implement and integrate REST APIs for internal and external systems
* Conduct unit testing using JUnit to ensure code quality
* Manage builds and dependencies with Maven
* Work with PostgreSQL, ideally including JSONB
* Design and develop scalable, maintainable microservice architectures
* Collaborate closely with product owners, architects, developers, and DevOps teams
* Contribute to the continuous improvement of development processes and tools
* Ensure solutions meet performance, stability, and security standards
* Contribute to the frontend using JavaScript/TypeScript and React or Angular
* Work with technologies from the Apache ecosystem where applicable (e.g. for services, integration, or tooling)
Required Skills & Experience
* Proven professional experience in backend development with Java (Java 21 preferred)
* Strong knowledge of Spring and Spring Boot
* Experience with REST API development and integration
* Proficiency in JUnit for unit testing
* Experience in Maven build management
* Solid knowledge of PostgreSQL (JSONB is a plus)
* Strong background in microservice architecture design and implementation
* Experience with frontend development using JavaScript/TypeScript and React or Angular
* Familiarity with Apache-based technologies in a typical Java backend stack
* Agile mindset and experience working in Scrum/Kanban teams
* Excellent command of English (spoken & written)
Nice to Have
* Kubernetes & Helm for deployment and orchestration
* SOAP service integration experience
* Experience with Graylog for logging and monitoring
* Telecommunications industry knowledge (big plus)
* Knowledge of Kafka, Apache
Work on impactful, enterprise-grade solutions
Agile, collaborative work environment with international teams
Opportunity to influence architecture and technology decisions
Engagement in a technically demanding, modern Java backend / Fullstack environment
Interested?
Please send your updated CV including availability and hourly rate expectations. We look forward to hearing from you!
Please contact me by email at elena.kahraman@qualysoft.com, or via LinkedIn. Thank you for your understanding! +43 699 14402417
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