Rapid București Born in
Bucharest, Ioniță joined the academy of
Rapid București at the age of six. On 21 May 2011, at only sixteen years and five months, he made his senior debut in a 1–0
Liga I victory against
FC Brașov. In the
2013–14 Liga II, Ioniță made fourteen appearances and six goals in total.
Astra Giurgiu Ioniță moved to
Astra Giurgiu during the winter 2014 transfer window, with fellow Liga I clubs
Dinamo București and
Petrolul Ploiești also interested in signing him. On 15 October 2015, he scored his first goal for Astra in a 3–0 away victory against
Viitorul Constanța at the
2015–16 Cupa Ligii. On 2 May 2016, Ioniță netted twice in a 4–2 home success against Dinamo București as Astra celebrated
its first league title. Following the transfer of
Constantin Budescu to
FCSB in June 2017, Ioniță took over his
number 10 shirt. On 13 July that year, he recorded his first
UEFA Europa League goal in a 3–1 home defeat against
Zira for the
second qualifying round. Ioniță was named the
Liga I Player of the Month for November 2017 after scoring in three consecutive league matches, against
Universitatea Craiova,
Concordia Chiajna and FCSB, respectively. Amid rumours of a transfer to
CFR Cluj in early January 2018, Ioniță refused to renew his contract with Astra and was expelled from the first team for an undetermined period.
CFR Cluj On 20 January 2018, Ioniță joined CFR Cluj's training camp in Spain after he was acquired for a rumoured fee of €1 million. Three days later, the move was made official. On 5 February Ioniță made his competitive debut in a 2–0 league victory against Concordia Chiajna at home. Later that month, after netting in the rebound from his
penalty that had been saved by his former Rapid teammate
Virgil Drăghia, he recorded his first goal for CFR in a 2–0 away victory against
Juventus București. In July 2019, following a disappointing
2018–19 campaign in which Ioniță only scored two goals from 27 appearances in all competitions, he agreed to a one-
year loan at Universitatea Craiova with a purchase option. After failing to gain playing time Craiova as well, the contract was terminated early and he returned to Astra Giurgiu on loan in the beginning of 2020. In September 2020, the
Romanian Anti-Doping Agency handed Ioniță along with two of his Astra teammates a one-year playing ban after they each received intravenous injections of more than 100mL of vitamins within one day. On 7 September 2021, CFR Cluj announced the termination of Ioniță's contract on a mutual agreement.
Return to Rapid București against
FCSB, April 2023 On 16 September 2021, Ioniță returned for Rapid București as a
free agent on a three-year contract. On 17 September, he debuted in a 2–0 victory against his former club CFR Cluj in the Liga I. Ioniță scored his first goal upon his return on 11 February 2022,
equalising late in a 1–1 league draw against
Sepsi OSK as his team played 40 minutes with one player less. On 13 March, he opened the scoring in a 3–1 Bucharest derby win against Dinamo, the first in almost fourteen years.
Yunnan Yukun On 26 February 2024, Rapid București announced that Ioniță was transferred to
China League One side
Yunnan Yukun. ==International career==