Born in 1933, he graduated from the University of Lodz in 1959 with a degree in mathematics and has been associated with the university ever since. He worked his way through all ranks of the academic career, becoming a full professor in 1982, and held positions of the head of the Department of Probability Calculus, head of the Department of Probability Theory and Statistics, and director of the Institute of Mathematics at the University of Lodz for many terms. He is considered the founder of the so-called Lodz school of probability.
He is an author or co-author of more than 100 original research papers in probability theory and functional analysis. The Professor's current achievements – published over the past few years in "Annals of Probablity", "Proceedings of AMS", "Tieorii Veliyatnosti", "Ergodic Theory and Dynamical Systems" – are greatly admired. Professor Jajte was a long-time member of the Committee for Mathematical Sciences of the Polish Academy of Sciences, has been a member of the Polish Mathematical Society since 1959, the Lodz Scientific Society since 1973, and the American Mathematical Society since 1978. He has been repeatedly invited as a visiting professor to American universities (Wayne State University, University of Tenneessee, Knoxville and University of North Carolina, Chapel Hill) and German universities (universities of Tbingen, Dortmund, Göttingen, Heidelberg, Mnster and Regensburg).
Professor Jajte has received many scientific awards from the Minister and Rector of the University of Lodz. He is a Knight of the Order of Polonia Restituta, was awarded the Honorary Badge of the City of Lodz (1982), the medal of the University of Lodz in the Service of Society and Science, the Jubilee Medal of the 50th anniversary of the University of Lodz, and the medal of the Commission of National Education. He also received the City of Lodz Award (2005).