Masecki was born in Warsaw in 1982. He began musical training at an early age with his father and quickly developed a taste for improvisation. At 12 he became a regular at local jam sessions and formed his first trio. In the years 1994 - 98 he studied at the Fryderyk Chopin Music School and joined the group Alchemik. They perfomed extensively throughout Europe, recording 4 albums and winning the Jazz Hoeilaart Competition in 98.
In 2000 Masecki received a scholarship to study in Berklee Colege of Music in Boston, where he spent the next 2 years. After graduation he returned to Warsaw and became an active member of the local improvised/alternative scene, reguarly inviting musicians from Boston and NY to perform.
Among others he worked with Tomasz Stanko, Pink Freud, Muzykoterapia, Innocent Sorcerers, Wojtek Waglewski, Macio Moretti, Raphael Roginski and Ziv Ravitz.


In 2005 he won first prize in the International Jazz Piano Competition in Moscow and formed the band TAQ, with Ziv Ravitz and Garth Stevenson. Together the have played several concert tours in Poland and the US, performing, among others, in New York's celebrated Joe's Pub.
In 2008 he formed the band Paristetris with argentinian singer Candelaria Saenz Valiente and polish multi-instrumentalist Macio Moretti. They released their debut album in the independent label Lado ABC and have already performed on important festivals such as the Heineken Open'er Fest in Gdansk. In 2009 they were nominated for Artist of the Year by the cultural magazine Aktivist.


After acumulating an impressive discography as member of various bands, Masecki realeased his first solo album in 2009 entitled "Bob", which has received an avalanche of positive reviews.


His parallel passion is classical music. Since 2007 he has been involved in the monumental process of recording Bach's "Art of the Fugue". Meanwhile he regularly performs solo recitals with varied repertoires, especially german 18th century music.


Masecki currently lives between Warsaw and Buenos Aires.