Thaciano was an undisputed for Porto during the 2014 campaign, as his side achieved a place in Série D.
Boa Esporte
On 13 January 2015, after fully recovering from an injury, Thaciano joined Série B side Boa Esporte on loan until the end of the year.[1] He made his professional debut on 1 September, coming on as a late substitute in a 1–2 home loss against Paraná.[2]
Thaciano scored his first goal on 16 October 2015, netting the second in a 2–2 home draw against Sampaio Corrêa.[3] He contributed with 11 appearances, scoring four goals, as his side suffered relegation.
Ahead of the 2016 season, Thaciano was bought outright by Boa.
Loan to Santos
On 9 May 2016, Thaciano was loaned to Santos for one year.[4] The following January, after appearing with the B-team in the Copa Paulista, he was promoted to the first team by manager Dorival Júnior.[5]
2017 season
On 29 June 2017, Thaciano returned to his parent club after an agreement between Santos and Boa Esporte was not reached; he only represented the main squad once, in a friendly against KAC Kénitra.[6] On 16 July, he scored a brace for Boa in a 2–2 away draw against Londrina.
Grêmio
On 29 November 2017, after scoring a career-best ten goals, Thaciano agreed to a two-year loan deal with Grêmio, with a buyout clause.[7] On 7 May 2019, he was bought outright by the club for a fee of R$ 2 million for 80% of his federative rights, and signed a three-year contract.[8]
On 23 November 2020, Thaciano renewed his link with the Tricolor until 2024.[9]
Loans to Bahia and Altay
On 1 April 2021, Thaciano was loaned to Bahia until the end of the year.[10] On 16 July, however, he moved abroad and joined Süper Lig side Altay also in a temporary deal.[11]
Bahia return
On 31 March 2023, Thaciano signed a permanent deal with Bahia until 2025.[12] He immediately established himself as a starter, before renewing his contract until 2027 on 21 March 2024.[13]
Thaciano finished the 2024 season with 15 goals, also scoring the club's goal number 10,000 back in March.[14]
Santos return
On 13 January 2025, Santos announced the return of Thaciano on a permanent four-year contract.[15]
^"Grêmio renova com meia Thaciano até 2024" [Grêmio renew with midfielder Thaciano until 2024] (in Brazilian Portuguese). Jornal O Sul. 23 November 2020. Retrieved 18 December 2024.
