iOS swift dveloper ( coding for a particular function of an app)

We require a Swift developer with Parse experience. The Swift code needs to be clear and commented. No design or UI work is required. We need coding done for a particular function of the app done and not the entire app. The app is a social media app. Function required - the user check-ins to a location and based on the location a sticker or attribute is selected by the app automatically. For example, if an user check-ins to restaurant, the foodie attribute gets highlighted and so on. More details once we find someone suitable. Screens will be provided, logos will be provided. We require a developer with the capacity to complete this within 2-4 days. Opportunities for further, more substantial work on this project may become available, should the developer demonstrate the required expertise. We have many smaller jobs like this as well.