Architect, engineer and a builder of Gdynia. Together with Marian Baranowski, he established the Construction Company which operated in Poznań and Gdynia. The cooperation resulted in several successful projects. Together, they designed the Holy Virgin Mary Church (Kościół Najświętszej Marii Panny) in 29/31 Świętojańska Street and they completed the construction works there in 1922 – 1927. In the Kamienna Góra district, in 16 Sędzickiego Street there is the “Poznanianka” villa which they built in 1921 – 1922 (probably designed by Kazmierz Krzyżanowski) and the villa “Szumka” for Janina Szumlańska in 37 Sienkiewicza Street which was built in 1923 and constitutes an example of manor architecture. Wojtkiewicz also designed several tenement houses: in 4 Portowa Street (designed in 1928), constructed in 1929 for Emilia Wojewska and in 11 Starowiejska Street, constructed in 1930 for Józef Tutkowski. The attics with the date of construction were their distinctive feature. The architect also designed two tenement houses in 65 Chylońska Street. They represented simplified academic classicism when it came to style and were constructed in 1931, by Józef Dobke. In the first years after Gdynia received a city charter, Wojtkiewicz supervised the design and construction activities on behalf of the mayor.