Senior Full-Stack Developer

Quick Facts

• Role: Senior Full-Stack Developer (Full Stack Developer/Engineer)

• Contract: B2B (initially until 06.2027, with possible extensions)

• Work mode: Hybrid from Warszawa office

• Rate: 180 PLN/hour + VAT

Description

Build and evolve a full-stack web application that helps financial analysts review, investigate, and correct processing results while ensuring data integrity and compliance with access-rights requirements. You will develop the React/TypeScript interface and the Node.js backend, implement data retrieval with SQL, integrate with Databricks for analytics/monitoring, and add audit logging.

The solution must be accessible, performant on large datasets, and covered by unit and integration tests.

Responsibilities

• Build the React and TypeScript UI from UI/UX designs and develop the Node.js 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.

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.

Benefits

• B2B Contract (first term until 06.2027 with possible extensions)

• Hybrid work from office in Warszawa

• Rate: 180 PLN/hour + VAT