Daniel Dudas

An iOS, Android, and web app to get invoices and money in advance or in installments.

I built the iOS, Android, and web front end from scratch using Expo with React Native. I used the same code for mobile and web with minor adjustments where needed.

On the back-end side, I improved and updated the current Node.js implementation with Express.js and PostgreSQL. Also, I added more types for TypeScript, improved the database connection, and added more APIs. External links were implemented with different payment providers like Dwolla for managing payments, Checkissuing for virtual and physical checks, Plaid for connecting bank accounts, and others.

Additionally, I implemented an OCR system to scan the invoices automatically and added a bulk upload system that used OCR to send invoices to the right businesses.

I worked closely with the CEO and took decisions on implementation paths.

I collaborated on an Angular 12 web app to monitor investments. I was in charge of upgrading to Angular 12, updating other libraries, setting a new structure of the code, and splitting the projects into subcomponents so it's easier to work with. I also implemented Internalization for translation in 6 languages, API integrations, and the display different charts and tables.

A platform for live streaming different sports or simple events. I was in charge of rebuilding the score-tracking system for which I implemented a new interface responsive for both web and desktop browsers using a Figma design. Each sport has particularities and different scoring systems, so each page had to be customized, and standard modules could not be duplicated.

I built a responsive static HTLM, SCSS, and JavaScript website for an architecture company in London. The website was stored on AWS S3, and I added AWS CloudFront as the content delivery network to improve the performance and loading time. For the contact form where the back end was needed to send emails, I used AWS Lambda, which reduced costs because the Lambda function is triggered only when a contact form is sent.

A Chrome browser extension built with Angular with authentication, payments, profile searches, and data scraping from different websites.

I was the only developer on the front-end side (browser extension) and deployed to the Chrome store, but it was built to support other browsers if needed.

An advisory tool for football and other sports tips and predictions. I worked on the full-stack development of the TacticalbeT mobile app for iOS and Android devices. The front end was built using React, communicating with the API via a REST API in JSON format. The back end was built in PHP, using Laravel and MySQL as databases. The app shows tips for betting on different sports added by a tipster in the admin interface. Users can buy subscriptions using in-app purchases to access all the information. I was in charge of the project from start to finish, including releasing it to the Apple and Google stores.

We started this project at Angular Attack 2016, and after winning the Design Award, we continued developing it. I worked in a team of two on the project's back end, mobile apps, and JavaScript parts. I used PHP with MySQL for the back end and deployed it to a Linux server. On the client side, we used Angular 2 with Material Design Lite. For the mobile apps, we used PhoneGap to use the same codebase for the apps.

This was a personal project. I built an Android mobile app with a back end using PHP and MySQL to access Wizz Air flight prices without any official API usage and inform users when the price goes low. The app had more than 350,000 downloads on Google Play.