Kamil Jakubczak

Meta Wallet is an SDK for clients that allows you to set a new wallet anywhere. It is configured through JSON options that are fetched from S3; it allows custom fonts, custom appearance, setting alternative digital payments as well as classic credit card systems.

A React Native application that can be easily customized for a new client and be released to an app store within the same day (at least uploaded to store). It is configurable with no developer input. Thanks to a changing application key, we can fetch the configuration for a specific new application as well as assets, icons, fonts, and anything else necessary for a new application, and put all of it in the new build (including package name and version for the store).

An ODIC client for a hybrid workflow: one to one with specifications. It also has single sign-on included as the same authentication service was used for some web apps. For that to work, Chrome Custom Tabs and the Safari browser were used (instead of WebView due to the lack of cookies that exist in regular browsers and security concerns).

A React Native application made for one of the biggest eCommerce clients and their mobile network, the whole purpose of the application was to manage subscriptions and pay bills. It's available for both iOS and Android and needs an OIDC client as it was using ServiceIdentity for .NET Core.

A Focus Pointe Global application for iOS and Android with the purpose of casting votes, filling out surveys, and representing results in a clear but pleasant format. I used NativeBase as a UI tool within the application.

A mobile application that displays products that you've acquired or want to get. With this app, you can also share your products with others and get their opinions.

I introduced a kind of gamification, where you could see other people's stuff and tell who is the "trendsetter" and such.

A mobile application that worked with a breathalyzer with a ton of features. These features included SMS/push notifications, background tasks, checking for current activity (being in a car, walking, and so on), random tests as required, scheduled tests, and confirmation of being a passenger in a moving vehicle like asking you to take pictures if there was driving activity.

I had the amazing opportunity to become a Toptal Academy lecturer where I tried my very best to explain how React Native works and what new developers should be aware of.

My lectures explained the entire build process, including:
• All the necessary elements to create an application
• How to deploy them to two major app stores (Google Play and App Store)
• Firebase integrations
• Styling
• Performance improvements
• Getting the most out of a native thread
• A short comparison with other similar technologies (similar to cross-platform)
• How to start a project and how to shape the architecture that I felt comfortable with (at the time at least)
• Explained the difference between React Native alone and RN with Expo.
• Shared a few good tips and lesser-known hints about React Native

React Native application for care workers, to make it easier for them to work with patients, to have information about each patient (as patient could vary daily) and to keep everything in check and control. It was also a way to know for family of patients, on how their loved ones are feeling.