Together with the LWP Agency responsible for conducting the competition, we implemented the online version of the financial quiz for the 3-11th grade students. Previously, the first round was through a paper-based application, followed by a full-day semi-final and final that required a personal presence. We had to come up with a COVID-proof solution for virtual events because of the 2020 pandemic. We performed software development work for the digital rounds, which included the creation of a complete registration system and the generation and operation of digital worksheets. For each age group, we had to compile a set of tasks of different difficulty, for which the easy-to-interpret interface was of paramount importance. Given the different technical infrastructure available to students, we have created a user-friendly interface that is transparent and easy to use when displayed on any size screen. Keeping the needs of the students in mind, we inserted rest screens into the time-limited tasks to allow them to tune in to the next task. Our system provided a solution even in the case of a tie, as it was able to determine the difference between the speeds of the fillings with millisecond accuracy. The efficient operation of our system has won the favor of our customers, so in the year 2021 the qualifying round will be also held online.