This network graph shows the hierarchical structure of job postings, branching from a central "Jobs" node into employment categories (full-time, part-time, contract, internship), then to geographic locations, and finally to specific job titles. The visualization uses D3.js v7 with `d3.forceSimulation`, `d3.forceLink`, and `d3.select` to create the SVG-based force-directed layout. Nodes are styled with black borders, while light gray links connect the three-tier hierarchy. The data is defined as static JavaScript arrays within the HTML file, and the graph dynamically sizes its width to the browser window.