Jaanus Siim

A platform for real-world location-based games with support for different game types. It is used by event companies, outdoor companies, schools, and others who need to create cool location-based games fast.

Coming in, I originally moved Objective-C based code gradually to Swift and envisioned a rules-based system where you would encapsulate game type-specific logic in discrete units that can be swapped out at runtime. It has worked out beautifully.

Now we're moving to real-time interactive multi-player games using Firestore live updates. This has also meant moving the app from a custom back-end API to using Firestore and Firebase storage.

The good:
* Unit tests for rules system allowed moving forward faster without the fear of breaking things. Of course, there could always be more unit tests.
* Feature flags in the main branch enable experimenting while delivering public releases.
* Abstracting back-end communication from core game logic allowed for an easier transition from the own API to Firestore saving.

An app that enables you to use your phone as a scanner in retail stores. You can perform touchless checkout using an in-store POS machine.

I extended and modernized the existing iOS codebase, moving the project to the Swift Package Manager-based feature-specific module packages. With new features sneaking in SwiftUI and the composable architecture, I extended and modernized the existing iOS codebase.

I also implemented a touchless checkout flow. It is amazing that the original iOS implementation idea worked.

This is a personal project for calorie tracking.

Based on your fitness goals, you may want to target consumed calorie deficit or surplus. Using Apple Watch, you will be given your basal and active calories burned.
Your daily calories' information will combine calories burned and consumed and project your deficit or surplus target in a 24-hour window. This will allow you to make educated decisions on how to adjust your activity or eating.

The food database will be built by yourself, considering a very tailored list of products specific to your region and preferences: over the last two years, I built a list of 350 foods and products.

Everything is backed up to iCloud and there are no third-party services involved.

Technologies:
HealthKit, SwiftUI, UIKit, CoreData, CloudKit, WidgetKit, IAP

Taxify gets you a taxi at the push of a button. The company is taking off at the moment in Europe. I led development for the native rewrite for version 2.0.

Technical notes: Core Location, Core Data, Google Maps SDK, AFNetworking

A simple ten-pair puzzle game. Personal project to get familiar with SpriteKit on iOS. For version 1.2, the whole project was rewritten in Swift.

Technical notes: Swift, SpriteKit, iAd

Estonia's biggest beer blog on iOS devices. It pulls posts from tartugambrinus.blogspot.com using Blogspot API. Done in cooperation with owner of the blog. The iPad version runs in kiosk mode also browsable in the beer shop owned by the blog writer.

Technical notes: Core Data, AFNetworking Blogspot API, Guided Access, Images Caching, UIKit