Full Stack Developer

Introduction & Summary We are seeking a Full Stack Developer/Engineer to join our team. The ideal candidate will have strong professional experience in building full-stack web applications utilizing React, TypeScript, and Node.js. You will play a vital role in developing a web application that facilitates financial analysts in reviewing, investigating, and correcting processing results while ensuring data integrity and compliance with access rights.

What we offer:

• B2B Contract ( first till 06.2027 + prolangations)
• Hybrid from office Warszawa
• Rate: 180 pln/ h + VAT

Main Responsibilities

• Build the React and TypeScript interface from the UI/UX designs and develop the Node.js application backend.
• Write SQL queries to retrieve data displayed in the application.
• Connect the application to Databricks objects for efficient data analysis and monitoring.
• Implement audit logging of user actions.
• Ensure the interface is accessible and performs well with large datasets.
• Write unit and integration tests for both frontend and backend.
• Collaborate closely with UI/UX designers and analysts.

Key Requirements

• Strong professional experience building full-stack web applications with React, TypeScript, and Node.js.
• A track record of delivering reliable, performant, production-grade applications.
• Good SQL skills, including joins, aggregations, and query performance optimization.
• Experience integrating web interfaces with backend services.
• Experience writing unit and integration tests for frontend and backend code.
• Experience implementing audit logging and secure application development.
• Good knowledge of web accessibility principles.
• Ability to translate designs and business requirements into functional software.

Nice to Have

• Experience building data-heavy applications for internal business users.
• Familiarity with Databricks, Databricks AppKit, or Microsoft Azure.
• Experience with financial or other business-critical applications.
• Experience using Playwright/Vitest for testing.