Fullstack Java Developer (banking)

• Minimum 5 years of experience in a similar role
• Experience in backend development with Java for API services
• Good knowledge of frontend technologies: React and/or Angular
• Experience building web applications with conversational elements (chat)
• Basics of BigQuery and SQL
• Ability to design ergonomic UI for data visualization
• Teamwork skills: Git, code review, standards, documentation, tests (unit/integration/e2e)
• Experience in production environments: CI/CD, monitoring, logging, incident handling
• Willingness to collaborate with AI Engineers and data teams on API contracts, validation, and cost controls
• Polish language proficiency at minimum B2 level for team communication

Nice to have:

• Knowledge of semantic/metrics layer solutions: semantic layer, caching, pre-aggregations, metrics governance
• Knowledge of "conversational analytics" tools/patterns for "chat with data": citations, "show SQL", explore vs answer modes, trust scoring
• Experience with UI and data visualization libraries
• Experience with GCP components: Cloud Run, Pub/Sub
• Basics of containerization and deployment: Docker/Kubernetes
• Experience in regulated environments (banking): audit, compliance, data classification, security processes

• Designing and developing backend services and APIs using Java
• Building web applications with conversational features including chat streaming, conversation history, user feedback, and source/presentation justification
• Designing ergonomic UI components for data such as tables, charts, drill-downs, and export functionality
• Participating in team workflows using Git, code reviews, quality standards, documentation, and testing (unit/integration/e2e)
• Working in production environments with CI/CD, monitoring, logging, and incident response
• Collaborating with AI Engineer and data teams on API contracts, data formats, validations, and cost constraints
• Building Data Lake and DWH solutions with both online and offline data ingestion
• Designing and implementing IT solutions for data supply
• Analyzing data and preparing logical and physical data models
• Creating data pipelines on-premises and on GCP
• Developing data loading solutions in Python and Rust for structured and unstructured data
• Building and developing "chat with data" tool from conversation layer through intent interpretation, query generation, and response presentation
• Problem incident resolution and support
• Supporting testing and deploying changes in data supply processes
• Assisting in servicing deployed software

The data controller is Britenet Sp. z o.o. based in Warszawa. Candidates have rights regarding personal data processing according to applicable laws. Providing mandatory data is required for recruitment process; refusal may prevent participation. The information clause details rights about data access, correction, deletion, objection, portability, complaint filing, and withdrawal of consent.