Two or three paragraphs here. Cover: what you do now, the thread that connects your projects (education, engineering, writing — whatever it is), and what you're looking for next. Keep it concrete — specific tools, specific outcomes — rather than generic adjectives.
A second paragraph on how you work: how you approach planning, what you value in a team or project, what kind of problems you gravitate toward. This is the part recruiters skim to figure out if you'd be a good fit for their team.
Links to the other sites and profiles that go deeper on specific work: