Stellendetails

Location: Vienna (1–2 days on-site per week during onboarding, then 2-4 day 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.

Why Join Us?

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 , or via LinkedIn. Thank you for your understanding!

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