Dominik Krížo

Sol2Ink is an application that transpiles Solidity smart contract application code to ink! and Rust code. This application aims to help developers and teams migrate from Solidity to ink! and WASM and make the learning curve of developers transitioning from Solidity to ink! easier. I came up with this idea and fully developed it, making it live.

This is a smart contract library for ink! smart contracts. ink! is an eDSL on Rust for WASM smart contracts running on substrate blockchains. OpenBrush provides standards for ink! smart contracts and macros for easier development of ink! smart contracts. I hugely contributed to standards implementation, unit tests, integration tests, and maintenance regarding new ink! versions.

An Android application for a Slovak betting company. I focused on refactoring legacy code from Java to Kotlin, reworking the application's UI, giving the application a new spirit and a nicer user experience, and connecting the application with the back-end database via a REST API.

Ported an old application that was running on Windows CE and written in C++ to a new Android application in Java. The application is used by employees to report their attendance and information about trains, by conductors to issue and inspect travel tickets, and to manage ticket sales at train stations. The app runs on a local database that can be synchronized with the server database. I developed this application in an Agile team following a Scrum-like approach with stand-ups and two-week sprints. The CI/CD pipeline was managed with Jenkins.

I completed two projects, written in Java, during a graduate course on algorithms and data structures. The goal of the projects was to provide evidence of real estate and lands; filter, add, edit, and delete these objects; and remain time and memory-efficient while doing so. I used my own components library with Graphics2D for simple UIs because they weren't the focus of the projects. When evaluated, each project received 13 of the 13 points available.

The first project focused on RAM efficiency, applying a K-Dimensional tree to determine how many keys each node had. Nodes were then compared by the key based on the level of the actual node being compared. The second project focused on storing large amounts of data, for example, in databases, so it aimed at disk efficiency using extensible hashing. Data was stored in the structure with keys, which were translated to hash and stored in the corresponding blocks in memory. If the blocks were full, they were stored in a congesting file.

A React-based web application, which allows students of the University of Žilina to swap courses with each other without the usage of some third-party social service like Facebook, WhatsApp, and others. The application works with the university's database, so the timetables are downloaded right from the university database, and swaps are also written to the database. The back end of this application is written in C#.NET, and the front end utilizes Node.js and React. My main contribution was testing, bug fixing, and enhancements to the application's back-end features.