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, flat hierarchy) under the stability of a secure multinational · A supportive culture (we value ownership, autonomy, and healthy work-life balance) with great colleagues, team events and activities · Flexible working program and openness to remote work · Collaborative mindset – employees shape their own benefits, tools, team events and internal practices · Diverse opportunities in Software Development with international exposure · Flexibility to choose projects aligned with your career path and technical goals · Access to leading learning platforms, courses, and certifications (Pluralsight, Udemy, Microsoft, Google Cloud) · Career growth & learning – mentorship programs, certifications, professional development opportunities, and above-market salary *We are an equal opportunity employer and value diversity. All employment decisions are made without regard to age, gender, disability, race, ethnicity, religion, sexual orientation, or any other protected characteristic. We encourage applicants from all backgrounds to apply.*