Felix Hessenberger

Starting as a pet project, Felix developed a complementary suite of applications for end-to-end visitor management and ticketing.
The biggest product is a calendar-based manager UI where template-based events can be created and bookings can be managed. The second application is a shop plugin that customers can integrate into any website. Lastly, a React Native-based scanner app is made available to customers on iOS and Android.
Felix wrote the project exclusively in TypeScript, it runs on the Google Firebase platform and has a server back-end with Node.js. The code is shared between projects via the monorepo pattern.

A native iOS app written in Swift that serves as a factor for the Swilox identity service.
Due to the nature of the app, there is a big focus on security. The server-client communication is done via a custom reactive protocol. Other interesting aspects of the app include hardware security via Secure Enclave as well as biometric authentication via LocalAuthentication.

A React Native app uses a single codebase to build clients for three platforms—iOS, Android, and Web. The product is backed by Firebase Cloud Firestore and Cloud Functions. The app was planned with a strong focus on economic operation and maximum scalability. Features include signed PDF generation and cryptographic handshaking.

Bee is a social network written in React and backed by Firebase.
The web app and design system were refactored to satisfy modern standards. Also, real-time interactivity was added to improve user satisfaction. The project was realized with a growing number of users in mind, so scalability and accessibility were a top priority.

A white-labeled React app that enables renters to report various issues to their service provider.
The app is interesting in the way that it combines server- and client-side rendering approaches. A back-end cockpit enables facility managers to search for issues via Algolia.

An Angular app to automate offer generation using the client's complex business logic. The step-based configuration interface is driven by data uploaded in the back-end application via Excel files. The offers can be saved and exported as PDFs, which are generated via a Firebase cloud function using Puppeteer.

Presono is a platform for managing presentations in enterprise environments.
Supporting their agile team, I developed a template-based WYSIWYG editor for presentation slides as well as many other parts of the React-based web platform. Additionally, I developed an offline-capable iOS wrapper for the core platform.

Part of the Presono platform, Presono Contacts is a flexible CRM front-end for fairs and other events.
I developed this native iOS app using the Eureka Forms library. With a data-driven UI and complex nested navigation patterns, the app grew into a complex project.

An iOS and Android app for managing bar inventory written in React Native.
The app features many CRUD operations and a multi-tenant user model. At the core, a visual fill level input module enables the user to efficiently input data.

A platform that connects photographers and agencies based on their interests and location.
I developed the web-based platform by myself using AngularJS in the front end and the Play framework in the back end.

iOS and Android apps to inform truck drivers of nearby fuel-related deals and promotions.
The user-facing views are web-based and written in React and the core functionality and wrapper are written in native code.

A simple React Native app that enables users to consume educational content.