Marcela Hrdá

This is a client-side validation library that aims for an excellent user experience.

The supported features include an automatic re-calculation of the validity when the user changes the input value, suggestions on showing/hiding the validation result, easy definition and usage of custom validation rules, conditional validations, validation of multiple fields, asynchronous (server) validations, and customizable debouncing/throttling for performance optimization.

The API is easy enough to use and very flexible at the same time; this library can be easily combined with other validation approaches.

Wordy is a single-page application that connects customers who need proofreading and copy-editing with English editors. Features include job bidding, a payment and invoicing system, an order log, a chat, support for organizations, different user roles, integrations with Google Drive and Dropbox, and more.

I supervised the junior engineers, co-created the architectural design, and coded some of critical pieces of the project.

For example, I designed and coded payment system that met complex business requirements involving credits, bonuses and refunds, and provided strong guarantees (solving issues with a non-transactional database and unreliable internet connection).

This single-page application is a simulation of a real banking environment and is used as a training tool for banking associates. The main part of the system is a complex form used for entering and processing loan application data. The application supports several different user roles that have very different responsibilities and rights, and can also track user interaction and compute statistical analysis of work efficiency during the simulation run.

I created a major part of the client-side code, and helped in setting up the hardware and system architecture of the final product.

I also managed a follow-up project and my main responsibilities in this project were technical communication with the client, organizing and supporting the development and testing, improving the system architecture, and installing the hardware infrastructure.

A fantasy-league game customized for Slovak market, coded as a single-page web application. The user can select a team consisting of football players and receives points for real-life events according to a given formula. Unfortunately, this project is no longer available, as its owner decided to shut it down.

I was responsible for back-end part of this project which included an integration with data providers and game logic implementation (processing users' rosters, computing scores and winners, auto-adjusting membership statuses, sending account-related notification emails, and more).

Google Code Jam is a world-wide coding competition in solving challenging algorithmic puzzles. I advanced to semifinals in 2015. (Handle: aklecram.)

I won a bronze medal in the International Physics Olympiad in my senior year of high school.

Co-authored a scientific research paper called:
M. Hrdá, T. Kulich, M. Repiský, J. Noga, O. L. Malkina, V. G. Malkin: Implementation of the Diagonalization-Free Algorithm in the Self-Consistent Field Procedure Within the Four-Component Relativistic Scheme, J. Comput. Chem. 2014, 35, 1725–1737.

This paper is based on a proposition of a new and very promising algorithm that can significantly speed up SCF procedure (one of basic algorithms used in computational quantum chemistry).

I enhanced the original algorithm, solving issues with its stability, reliability and efficiency. I have also run many benchmark calculations to tune the algorithm performance to its maximum.

The paper presents the enhanced algorithm along with a quantum-chemistry proof of its guarantees, documented the benchmark calculations and resulting recommendations for optimal parameter choice, and a generalized version of the algorithm that can be applied to relativistic quantum chemistry.