At LDU Quito, he built a reputation as a very capable striker. He was an integral part of the squad that won the 2008 Copa Libertadores (where he had a goal wrongfully disallowed for offsides in the final game) and the squad that was the runner-up of the 2008 FIFA Club World Cup. He was the team's top-scorer in 2008 with 17 goals, and was the Ecuadorian Serie A's top-scorer in 2009 with 22 goals. He provided the winning goal in Liga's win in the first leg of the 2009 Recopa Sudamericana and scored one of three goals in the second leg at home. In the 2009 Copa Sudamericana, he was the tournament's top-scorer with eight goals, including two hat-tricks against Argentine team Lanús and Uruguayan team River Plate.
He scored his first hat-trick for Serie A on February 12, 2012, in the match between LDU Quito and Olmedo, where LDU Quito won 5–0. He garnered interest from Mexican clubs, although he expressed his wish to retire with Liga de Quito.
Racing Club
On January 6, 2010 Racing Club de Avellaneda signed the striker to a three-and-a-half-year contract with 50% of the Bieler sporting rights.[2]
Due to his performance playing for LDU Quito, elements of the Ecuadorian press have suggested that Bieler should play for the Ecuador national team. When asked to comment on the remarks, he has publicly stated that he would change nationalities to play for Ecuador.[6][7] On February 4, 2010, he was called up by Argentine manager Diego Maradona,[8] but ended up not playing because of a suspected injury.[9] In May 2010, Bieler returned to Ecuador to undergo the naturalization process.[10] However, he is not eligible to play for the Ecuador national team.[11]