About the Position

Java Fullstack Developer

120 - 140 PLN/godz. (netto)

We are seeking a skilled Java Fullstack Developer to join our banking client in Warszawa, Poland. This role involves working with both frontend and backend technologies to develop web applications.

Responsibilities

Designing and developing web applications using Java (backend) and React (frontend)
Creating and integrating REST APIs, managing databases, and ensuring application performance and security
Collaborating with the team (testers, DevOps, UX) for deployment, testing, and system maintenance

Requirements

Knowledge of frontend: React
Experience in building web applications with conversational elements (chat): streaming responses, conversation history, user feedback, source/reason presentation
Experience in backend development: Java – designing and developing API services
Basics of working with BigQuery/SQL
Ability to design user-friendly UI for data: tables, charts, drilldown, result export
Team work practice: 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 constraints)

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, trust scoring
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.

Contact

For more information and to apply, visit our job listing.

Java Fullstack Developer

Job description