Greetings,
I'm looking for my first project on Freelancer, and your proposal looks right up my street. I'm a Senior Technical Lead for a UK based Formula 1 team, with over 10 years experience in web and desktop software engineering. I've been developing specifically with React, Redux and Webpack for 3 years now (amongst a raft of other technologies), in both TypeScript and JavaScript.
I'd like to discuss your requirements in further detail, as I'm also a user of the Betfair Exchange API, so your mention of betting features is certainly interesting!
All the best,
Jimmy