hi, i am a python developer with extensive experience in web developing, i also have a machine learning background and have a master degree in this area, have done a lot of researches in images and text classification. from the list of expertise you are requiring, the only problem i have is i have little experience with node/express(have played with it but no real experience in real projects). If you are interested in me, please contact me and i will send you more my information and demos