Finalize Python Web App Integration

I already have a Python-based web app in production code but several key pieces are still loose. The core logic is there; what I need now is someone who can jump in, finish the incomplete sections, and make the whole thing work as one seamless system... (Budget: $1500 - $3000 USD, Jobs: API Integration, Django, Flask, JavaScript, Python, RESTful API, Software Architecture, Web Development)