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.

An app to alert firefighters based on their qualifications and availability.
The app is written natively and uses a Material Design library for UI elements. Notifications and crash reporting are done using the Firebase SDK.

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