Given the description, I'm assuming that the backend core logic has been developed, while the web framework and front-end is yet to be developed. Unless you have already a made a decision on framework, I would recommend using Flask for the backend which will allow a simple bootstrap based frontend. I've been using this combination for a while for variety of projects. If you could share more specifics then we can discuss the same over the chat.
BTW, I've over 15 years of experience in software development, and I believe if doing high quality work instead of competing on low prices. That should assure you of a high quality output.
Thanks,
Gaurav