This template fits engineers with two or more roles to show, where the shape of the career is part of the story — a progression from implementation toward design and ownership. The timeline rail makes that progression visible at a glance, which is worth something to a reviewer scanning fifty resumes for someone ready to operate a level up.
It is a weaker fit for a first job. If you have one internship and three university projects, the timeline has almost nothing to draw and the vertical rail draws attention to that emptiness. The compact one-page layout on the fresher page handles that case better by giving projects the same visual weight as employment.
It also suits engineers applying across company sizes. Startups tend to read the whole resume; larger firms often screen on skills first. Because the skills block sits above the timeline without occupying much height, both reading orders work without maintaining two versions.