Location: Vienna (1–2 days on-site per week during onboarding, then 2-4 day per month; otherwise fully remote) Start: ASAP \u007C Duration: 12 months (extension possible) \u007C 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.
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
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 elena.kahraman@qualysoft.com, or via LinkedIn. Thank you for your understanding! +43 699 14402417
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
QualysoftWienCollaborate closely with product owners, architects, developers, and DevOps teams. Location: Vienna (1–2 days on-site per week during onboarding, then 2-4 day……30T+
UnzerWienWe provide them with the modules, which are easy to integrate, cover the entire spectrum of payment management: from the processing of various payment types,……30T+
REWE GroupWienSenior Backend Developer (m/f/d) | CRM Data & Insights. We are looking for a Java Backend Developer (m/f/d) who enjoys building robust, scalable backend systems……23T
KNAPP AGHart bei GrazDu entwickelst robuste, skalierbare Backend‑Services und Komponenten für unsere Data‑Platforms‑Architektur. Du containerisierst und orchestrierst Services in……22T