About the Position

We are seeking a Java Fullstack Developer with experience in React and backend development to join our banking client's team. You will work on building web applications with conversational elements and backend services.

Responsibilities

Designing and developing web applications using Java (backend) and React (frontend)
Creating and integrating REST APIs
Handling databases and ensuring application performance and security
Collaborating with the team (testers, DevOps, UX) during implementation, testing, and maintenance of systems

Requirements

Knowledge of frontend: React
Experience in building web applications with conversational elements (chat): streaming responses, conversation history, user feedback, presentation of sources/justifications
Experience in backend development: Java – designing and developing API services
Basics of working with BigQuery/SQL
Ability to design an ergonomic UI for data: tables, charts, drilldown, export results
Practical experience in teamwork: Git, code review, quality standards, documentation, testing (unit/integration/e2e)
Experience in a production environment: CI/CD, monitoring/logging, incident response
Willingness to collaborate with AI Engineers and data teams (API contracts, data formats, validations, cost limitations)

Nice to Have

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

We Offer

Transparent terms of cooperation
Long-term collaboration
Opportunity to work on a development project
Optional benefits (subsidy for Enel-med and Multisport medical packages and a basic accounting package - free up to three invoices per month)

About the Company

Client from the banking industry.

Salary

120 - 140 PLN/hour

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Java Fullstack Developer

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