Rastislav Mirek

PIACET is an iOS application for tracking and sharing professional credentials focused on health and emergency services professionals. I handled the entire development from updating specification to the App Store release. I also handled some project management tasks and provided consultancy on both technical and non-technical matters.

Technology used include Swift 3 and Firebase.

EasyType is an innovative, full-featured, and highly customizable iOS keyboard designed as a replacement for the default iPhone keyboard.

I developed the entire product in Swift, including an integrated emoji keyboard, support for interchangeable keyboard themes, typing prediction, auto-correction for 16 different languages, in-app purchases, 18 settings to change keyboard behavior, and more. I also implemented low-level touch events handling required for unique features, e.g., the keyboard's ability to scroll, 3D touch support, and key swipe gestures. I created several tools for the project, including reusable libraries and standalone helper apps.

I developed this iMessage extension app in Swift 3. It allows the creation of funny chat stickers from photos and posts them in the iMessage conversation. To create a reusable sticker, users can take a photo using a camera or choose one from their library—resize, position it, and crop it using one of dozens sticker shapes.

I developed various features of a complex real-time monitoring, fraud detection, and reporting system for hospitality businesses.

I worked on both the iOS client (in Objective-C) and back-end (in .NET). Specifically, I designed the architecture for real-time employee performance reporting system including RESTful server-client communication protocol and implemented it end-to-end. The important part of the work was the development of the mobile UI for presenting structured statistical data on iOS devices. I also developed the AI fraud detection system for suspicious financial transactions recognition in C# .NET. While working on the Restaurant Guard mobile, I was tasked with leading the development team and was responsible for the overall quality of all parts of the system.

Splyt is an iOS and Android payment app simplifying group payments. Based on my suggestion, the app was written in Flutter (originally, native development was preferred). This decision saved a lot of development resources.

Splyt is still in development, so the details are not public. The app was founded by Phil Karl and William Key, founders of LiveProfile, a messaging app that reached 200,000 new users a day (and was the #1 app on Android) before it was sold to and later discontinued by BlackBerry.

I was a senior developer on the project, working on the architecture and UI of the app, working directly with the founders.