David Tengeri

A Flutter-based web application to collect sound samples from children and verify them through SoapBox Labs APIs.

I implemented a JavaScript plugin for Flutter to record the sounds in WAV format. The sounds and the result of verifications were saved through REST API. Used DDD architecture, BLoC, Freezed, and Retrofit.

Implemented a Flutter-based game for the web with the Flame game engine. The game's goal is to help children learn the first sounds of different words and verify how to pronounce them. The verification was done through SoapBox Labs APIs.

The game followed a script that played audio samples and audio instructions. I integrated Rive animations, as well. Used DDD architecture, flame_bloc, and flame_behaviours.

I give a course in my free time at the University of Szeged, where I show the students how they can build applications with Flutter. I have been doing this since 2019. At the end of the semester, the students have all the basics they need to develop their own applications.

A Flutter application with an interactive timeline with thousands of items each day. Its goal is to help managers to schedule the items quickly. The communication goes through a custom protocol over WebSocket.

Daily Photo Journal is an app to create a journal of photos you make daily, so you can watch how you have made progress. It can help you document your weight loss during a diet, how your body changes during pregnancy, or create a picture of yourself daily.

The application follows the domain-driven design principles in its implementation. It uses the BLoC package for state management, Hive for data storage, Freezed for code generation, and get_it for dependency injection.

A React Native-based project written for restaurants to replace paper-based checklists. It uses Firebase as its back end and provides a detailed summary of issues for the managers. It has automatic checklist generation implemented by Firebase functions.

A Ruby on Rails-based project, where I was a back-end developer. My task was to improve the search results by extending the automatic classification with new categories. I worked on the background job that processes the scraped information.

A web application with a Ruby on Rails REST API and a React SPA as its front end. Ignite is a partnership program for tobacco retailers in Ireland. The project was built from scratch, and I worked as a full-stack developer and as the team lead.

A Flutter application that allows you to buy from the best independent stores and quality brands across London, delivering to your door in under 90 minutes with real-time tracking to ensure you never miss another delivery.