Java Full Stack Developer (f/m/d)

Qualysoft; Wien; On-site; EUR 70,110 - 73,800; Full time

Job summary

A tech consulting firm in Austria is seeking an experienced Java Full Stack Developer focused on backend development. The role involves designing and maintaining enterprise-grade services, developing REST APIs, and applying BPMN methodologies. Ideal candidates will have proficiency in Java, Spring, and microservices, along with an agile mindset. The daily rate is €380 - €400.

Qualifications

• Proven professional experience in backend development with Java.
• Strong knowledge of Spring and Spring Boot.
• Solid understanding of BPMN, with Camunda BPM preferred.

Responsibilities

• Design, develop, and maintain backend services using Java 21, Spring, and Spring Boot.
• Implement and integrate REST APIs for internal and external systems.
• Apply BPMN knowledge for long-running processes.

Skills

Backend development with Java

Spring

Spring Boot

BPMN knowledge

REST API development

JUnit

Maven management

PostgreSQL

Microservice architecture

Agile/Scrum/Kanban experience

English proficiency

Tools

Camunda BPM

PostgreSQL (JSONB)

Job description

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.

€380 - €400 a day

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)

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 [e-mail], or via LinkedIn. Thank you for your understanding! [phone]