As a very experienced (10+ years) developer, I've used React/Redux and Typescript extensively in my role(s) as a Senior Software Developer based in San Francisco.
I've started and sold a startup, and worked for several other Silicon Valley startups, including mentoring, pairing and teaching junior programmers
I have extensive experience with data visualization in particular, and can help you with d3.js as well as with Typescript, React and test driven development. Let's chat!