Need an online knowledge test widget with automatic scoring

We are looking for a developer to build an online knowledge-assessment widget that our school can embed on its website to quickly gauge a visitor's skill level before they choose a course. The visitor answers a series of questions on a chosen topic, the system automatically checks the answers, tallies the score, and determines a level based on the result — for example beginner, intermediate, or advanced. At the end of the test the widget should show a personalized recommendation of which course from our lineup fits that result, along with a short explanation of why.

The widget needs to be lightweight and fast, work correctly on mobile devices, and move between questions and show the final screen without full page reloads or noticeable delay. Scoring logic and the rules for determining each level should be configurable through a simple admin panel so we can edit questions, answer options, point weights and level thresholds ourselves after the project is delivered, without going back to the developer every time.

We would like clean, well-commented source code plus a short guide explaining how to embed the widget on different pages and how to edit the test content.

Please plan for:
— several question types (single correct answer, multiple correct answers, agreement scale);
— a progress bar showing how far through the test the visitor is;
— saving partial progress if the tab is closed accidentally;
— a results screen with the level and course recommendation;
— responsive layout for phones and tablets.