Senior Fullstack Developer

Required skills: Node.js, React, TypeScript 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.