Senior Java Developer; Cards

About Qualysoft

• 25 years of experience in software engineering, established in Vienna, Austria
• Active in Romania since 2007, with office in central Bucharest (Bd. Iancu de Hunedoara 54B)
• Delivering End to End IT Consulting Services - From Team Augmentation and Dedicated Teams to Custom Software Development
• We deliver scalable enterprise systems, intelligent automation frameworks, and digital transformation platforms
• Cross-industry experience by sustaining global players in BSFI (Banking, financial services and insurance), Telecom,Retail & E-commerce, Energy and Utilities, Automotive, Manufacturing, Logitics, High Tech
• Global Presence:
  Switzerland,Germany,Austria,Sweden,Hungary,Slovakia,Serbia,Romania, and Indonesia
• International team of 500+ software engineers
• Strategic partnerships:
  Microsoft Cloud Certified Partner, Tricentis Solutions Partner in Test Automation and Test Management, Creatio Exclusive Partner, Doxee Implementation Partner
• Powered by cutting-edge technologies: AI, Data & Analytics, Cloud, Dev Ops, IoT, and Test Automation.
• Project beneficiaries ranging from large-scale enterprises to startups
• Stable growth and revenue increase year over year, a resilient organisation in volatile IT market conditions
• Quality-first mindset, culture of innovation, and long-term client partnerships
• Global and local reach – trusted by key industry players in Europe and the US

• Design, develop and maintain backend applications and services using Java 17+ and Spring Boot.
• Design and implement REST APIs and integrations using JSON, XML and SOAP where required.
• Contribute to reusable integration capabilities and avoid application‑specific point‑to‑point solutions where a generic service is appropriate.
• Design and implement synchronous, asynchronous and event‑driven interaction patterns based on solution needs.
• Integrate applications using Apache Kafka or equivalent enterprise messaging platforms.
• Implement authentication and authorization mechanisms using OAuth 2.0, JWT and enterprise access‑management solutions.
• Build automated unit and component tests using JUnit, Mockito or equivalent frameworks.
• Participate in code reviews and contribute to clean code, security, performance and engineering‑quality standards.
• Containerize applications and support delivery through Docker and Open Shift/Kubernetes‑based platforms.
• Implement logging, metrics and tracing aligned with the organization’s observability standards.
• Identify and resolve scalability, reliability and performance issues during development and testing.
• Create and maintain technical documentation, API specifications and implementation notes.
• Use enterprise‑approved generative AI tools responsibly to improve development, testing and documentation productivity, while validating all generated output.

• Minimum 5 years of hands‑on backend development experience with Java.
• Minimum 3 years of hands‑on development experience with Spring Boot.
• Minimum 3 years of experience designing and implementing REST APIs and system‑to‑system integrations.
• Minimum 2 years of practical experience with Oracle Database and SQL; interaction with PL/SQL components is expected where relevant.
• Minimum 2 years of experience with messaging or event‑driven solutions, preferably Apache Kafka.
• Minimum 2 years of experience with Docker and container orchestration platforms such as Kubernetes or Open Shift.
• Proven experience delivering business‑critical enterprise applications through the full software delivery lifecycle.
• Experience in banking, financial services or another highly regulated industry is strongly preferred; minimum 2 years is preferred for candidates presented as banking‑experienced.

• Minimum 3 years of experience delivering…