Need React Native dev urgently

I need an iPhone app to be built quickly. It's simple and needs to connect to Twitter API and produce alerts based on keywords being found in particular tweets. We have already framed this and can share the prototype. This needs to work in real-time. If a tweet occurs, I need to be alerted to it almost instantly.
If you have ever built an iPhone app that connects to a 3rd party API and also utilizes push alerts please be kind to respond to this job.