Experienced Full-Stack Developer (React / Node.js / .NET) for Interactive Assessment System

We are looking for a reliable and experienced freelance developer for long-term collaboration.

Your responsibilities will include:

Maintenance and enhancement of existing interactive web-based assessment tools

Implementation of new modules with test logic, timing, and result output

Backend development using Node.js and/or .NET Core

Frontend development using React (SPA)

Integration of PDF generation and CSV data export

Ensuring GDPR-compliant data storage and secure architecture

Creating well-documented and easily maintainable code

You will work remotely and communicate directly with our EU-based technical lead.

A short, paid technical test task may be required before project start.

How to Apply:

Please provide:

Your portfolio or links to relevant work

Your hourly rate or price estimate per module

Your availability (start date and weekly capacity)

We look forward to your application!

We offer a long-term collaboration at 85 PLN/hour (net), with clear documentation, steady technical guidance and flexible task volumes.