FullStack Java Engineer

**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, DevOps, 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 ### Responsibilities • Build and maintain backend services using Java 21, Spring Boot, and asynchronous processing patterns. • Design and enhance LLM-based pipeline stages for classification, matching, risk assessment, summarization, and draft generation. • Implement robust structured output validation, retry mechanisms, and error handling for model interactions. • Optimize semantic search using PostgreSQL and pgvector to enable high-quality retrieval of legal precedents. • Extend data models and database migrations with backward-compatible schema changes. • Build and enhance frontend workflows using React and TypeScript, including dashboards, document browsers, extraction review interfaces, and defense generation features. • Integrate real-time progress updates through WebSockets. • Maintain secure authentication and authorization using Keycloak, OIDC, and JWT. • Develop and maintain backend and frontend test coverage while supporting CI quality gates. • Improve observability through distributed tracing, structured logging, and operational dashboards. ### Qualifications • 5+ years of software engineering experience working on production systems. • Strong experience in Java backend development, including Spring Boot, REST APIs, and data access layers. • Solid PostgreSQL expertise, including schema design and query optimization. • Hands-on experience integrating LLM APIs (OpenAI, Azure OpenAI, Anthropic, or similar). • Experience with semantic search and vector retrieval technologies (pgvector, Pinecone, Weaviate, or similar). • 3+ years of experience with React and TypeScript development. • Practical experience implementing OAuth, OIDC, and JWT authentication and authorization flows. • Strong testing discipline, including unit, integration, API, and contract testing. ### Nice to have • Experience with Azure services, including Azure OpenAI, Document Intelligence, PostgreSQL, and Container Apps. • Experience with Docker, Docker Compose, and CI/CD pipelines. • Domain knowledge in legal tech, financial services, or other highly regulated industries. • Familiarity with observability stacks, including OpenTelemetry, centralized logging, and monitoring dashboards. • Familiarity with LLM evaluation, guardrails, and regression testing tools such as Promptfoo, DeepEval, Langfuse, Giskard, or Guardrails. **What We Offer** · Premium medical package · Lunch Tickets & Pluxee Card · Bookster subscription · 13th salary/yearly bonuses · Enterprise job security with a startup mentality (diverse & engaging environment, international exposure…