Austėja Letukienė is a licensed medical geneticist, researcher, and final-year PhD candidate, as well as the founder of In Genes, established in 2021 — a science-led DNA analysis company focused on translating genetic insight into clear, personalised action — without guesswork. The company’s mission is to turn biological information into practical direction by supporting evidence-based training adjustments and personalised health decisions. She has previously held a full-time research position at the Karolinska Institute, where she contributed to studies investigating immune and molecular responses to elite-level physical training. Alongside her applied and translational work, Austėja is affiliated with Vilnius University as a researcher within the Population Genomics research group, where her work includes bioinformatic analysis of de novo mutations in preterm infants. Her doctoral research focuses on predictive genomics in metabolic health and body composition, investigating how individual genetic profiles influence physiological adaptation to long-term aerobic and combined aerobic–strength training interventions. She has contributed to multiple international scientific conferences, including the European College of Sport Science (ECSS) Congress (2022, 2025), the European Society of Human Genetics (ESHG) Conference (2022, 2025), the Obesity Congress (2025), and other international meetings in sports and exercise science.