This example presents a hierarchical tree visualization of LinkedIn job postings, organizing data by company, location, and employment type. Using D3.js v7, it renders an SVG tree layout with distinct node shapes—diamonds for the root, circles for companies, squares for locations, and smaller circles for job types—each color-coded for clarity. The visualization employs `d3.hierarchy()` and `d3.tree()` to compute the layout, with `d3.linkHorizontal()` generating curved connecting paths. A legend explains the shape-color mapping, while the pink background and purple heading give the chart a distinctive style. The data is hardcoded and static.