Help to develop an Application (with front-end) with a back-end developer. For a prototype.

It is a question and answers exchange system between people, where the people have the possibility to earn money. We are working on the Project for 5 months and we made system researched and the design. We have the marketing plan and business plan. We are 5 people working on the Project. A back-end developer, web designer, legal department, SMM marketing specialist and me the founder and CEO. I started to develop the project by myself, made the system and the design. We have to make a prototype asap to test the app in real life. We collected the platforms where we are going to test the system. We also started to work with an app developer but he left us 1 week ago. So we actually started already and we have our project in bitbucket. Here we need some help. The system is complex and easy in the same time. So I would like to discuss it with you if you are interested. Thank you! Technologies we are working with: * React Native * Jest for testing Server/Backend: * Spring Boot/Java * Assert4J or Spock framework for testing * PostgreSQL as RDBMS * Hosted in Google AppEngine * Admin site/dashboard in Angular4 for internal members (managing myAux users, inspecting users' conversations, blocking abusive users, analysin user behaviours etc...) External services: * Firebase Database for realtime communication and pub/sub architecture * Firebase Authentication for user storage and authentication Methodology: * Weekly stand-up for the whole team * PR-based development * Code hosted in private bitbucket repository * Introduce Jenkins CI build system (when we receive some funding and upgrade the BitBucket account)