Marcin Fortuna enhanced the GENESYS-PK/our_lib repository by developing new components for an Evolutionary Algorithm Toolkit, focusing on improving experimentation speed and maintainability. He introduced strategies such as SimpleClampStrategy, OnePointAverageCrossover, SphereMutation, and TournamentSelection, each designed to expand the toolkit’s flexibility for evolutionary computation tasks. Marcin applied object-oriented programming principles and Python to refactor core modules, improving type hinting and initialization in ClampStrategy, Evolution, and FitnessFunction. These changes streamlined onboarding and reduced technical debt, enabling faster iteration for users. The work demonstrated depth in evolutionary algorithms and software design, addressing both immediate experimentation needs and long-term code reliability.