Radek Salač

Online survey tool that helps users create questionnaires and connect them with suitable respondents. This tool also contains a module for advanced data analysis, which allows finding our customers' needs.

Online database of respondents that enables finding out suitable respondents by various (even custom) parameters. This application also has accounting capabilities that allow users to track money on the personal account of a particular respondent.

An Android application written in Java/C (through JNI) that records voice on Android devices, converts them by OPUS codec, and sends the result to the server for automatic speech to text conversion in real-time.

An Android application that helps respondents answer the survey created by the administrator. Surveys are obtained dynamically from the server and stored in a local cache, enabling respondents to work offline.

As a part of my bachelor's degree thesis, I implemented selected procedures into the algebraic system Octave, which greatly improved Octave capabilities when working with sparse matrices. This work was then integrated into upstream.

I developed and maintained the application that scraped real estate information from an estate server.

After that, I used the Google Geolocation API to translate the address to GPS coordinates. Since there were millions of GPS coordinates, I created our own geocoding tool.

For advanced functionality, I used PostgreSQL with the PostGIS module.

I imported data from OpenStreet maps, and after that, I calculated the price of maps based on:
1) the actual price of scraped estates
2) the distance from forest/roads/shops

For visualization, I used OpenLayers together with OpenStreet maps.

I transformed the design from Photoshop files into modern HTML5/CSS3 responsive web templates for BoltCMS. I also wrote the REST API integration to the back-end system, storing data about real estate properties.