Born in Warsaw on the 7th of February 1885. He graduated from the Warsaw Commercial School of the Council of Merchants. He also studied abroad, completing, for instance, the Department of Law of the University of Zurich. He was a lecturer at the Warsaw Society for Scientific Courses. Following the promulgation of the Act of 5th November by the Emperors of Germany and Austria, he became a member of the Constitutional Sejm Commission formed in January, 1917, and attached to the Provisional Council of State. The Commission’s task was to work out a draft of the future constitution of the Polish Kingdom. After Poland regained her independence, Maliniak was still involved in the works on the new constitution, this time, though, in the Constitutional Office attached to the Presidium of the Council of Ministers and established on the initiative of the Prime Minister Jędrzej Moraczewski, and in the expert commission called Questionnaire for the Assessment of Constitution Drafts and created by the Prime Minister Ignacy Paderewski. Although the latter body was charged with evaluating other constitutional projects, the works of the Questionnaire… eventually led to the preparation of their own draft of a constitution which, however, was not officially recognized by Paderewski’s cabinet (this was also due to the unfavourable attitude of the Sejm, eager to protect its own exclusivity in that field) and did not become a basis for the further constitutional works that led to the passing of the March Constitution, which Maliniak regarded as an ill-judged act. In 1920 Maliniak joined the Polish Army and took part in the Polish-Soviet war. He pursued his academic career as lecturer of the Free Polish University. In 1931-1935 he held the post of dean of the Department of Law and Socio-Economical Sciences of that institution. He taught the history of Polish political system, philosophy of law, and constitutional law. While in his youth he had been active in the Socialist movement (as a member of the Polish Socialist Party - PPS), in the Second Polish Republic he associated with a circle which established the Polish Labour Party in 1926; a Centre political group belonging to the Sanation camp. He wrote for the “Epoka” daily, the organ of the Labour Party, and collaborated with “Głos Prawdy”, and then with the pro-government “Gazeta Polska”. His most important works were usually published in the columns of various dailies and magazines; apart from the above-mentioned titles, these were, for instance, “Droga”, and “Ruch Prawniczy i Ekonomiczny”. He wrote treatises such as Demokratyzm a parlamentaryzm (1919), Wybory a zasady (1928), Konieczność zmiany konstytucji marcowej (1930), Fetyszyzm prawniczy w koncepcjach konstytucyjnych (1935), Józef Piłsudski jako polityk romantyczny (1935), Zagadnienie podziału władz w prawie państwowym nowoczesnym (1936), and Walka klas a rzeczywistość (1937). He was murdered by the Germans in 1941.