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Java Full Stack Developer

Qualysoft

Hybrid
Wien
Contract
Mid Level
Salary not listedPosted 1mo ago
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Real job — pulled straight from Qualysoft’s careers page · Verified September 5, 2026 · No reposts.

Job description

Qualysoft is hiring a Java Full Stack Developer — a contract, based in Wien role. Apply directly on Qualysoft's careers page below.

Java Full Stack Developer (f/m/d)

Team: Software Development

Location: Wien

Commitment: Contract

Workplace Type: hybrid

Salary:

Key Responsibilities

Design, develop, and maintain backend services using Java 21, Spring, and Spring Boot 3
Implement and integrate REST APIs for internal and external systems
Apply BPMN knowledge (Camunda BPM preferred) for long-running processes
Conduct unit testing using JUnit to ensure code quality
Manage builds and dependencies with Maven
Work with PostgreSQL, ideally with 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

Required Skills & Experience

Proven professional experience in backend development with Java (Java 21 preferred)
Strong knowledge of Spring and Spring Boot 3
Solid understanding of BPMN (Camunda BPM is a strong advantage)
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
Agile mindset and experience working in Scrum/Kanban teams
Excellent command of English (spoken & written)

We are seeking an experienced Java Full Stack Developer with a strong focus on backend development to join our agile team. You will be responsible for building and maintaining enterprise-grade services and automating business processes using BPMN (ideally with Camunda BPM). Your role will involve designing and developing APIs, implementing microservice-based architectures, and integrating with databases, all while collaborating closely with cross-functional teams in an agile environment. Experience in the telecommunications sector is highly desirable and will be considered a strong plus.
Interested?

Please send your updated CV including availability and hourly rate expectations. We look forward to hearing from you!

Please contact me via Freelancermap by email at elena.kahraman@qualysoft.com, or via LinkedIn. Thank you for your understanding! +43 699 14402417
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Frequently asked questions

What skills are required for Java Full Stack Developer at Qualysoft?

The required skills for Java Full Stack Developer at Qualysoft include: Java, Spring, Spring Boot, REST, JUnit, Maven, PostgreSQL, Microservices, Agile, Scrum, Kanban.

What is the seniority level for Java Full Stack Developer at Qualysoft?

Java Full Stack Developer at Qualysoft is a Mid Level level position.

How do I apply for Java Full Stack Developer at Qualysoft?

You can view the full description and apply for Java Full Stack Developer at Qualysoft on EchoJobs: https://echojobs.io/job/qualysoft-java-full-stack-developer-f-m-d-wtldg.

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