Widjaja made a debut in the international tournament at the 2010
Indonesia International Challenge, reaching in to the quarterfinals in the women's and mixed doubles event. She was selected to join national junior team compete at the
2011 Asian and
World Junior Championships. Teamed-up with
Alfian Eko Prasetya, they emerged as the
mixed doubles world junior champion, beating their compatriots
Ronald Alexander and
Tiara Rosalia Nuraidah in the rubber games 12–21, 21–17, 25–23 in the final. In 2012, she and Prasetya finished as the runner-up at the 2012
India International Challenge after defeated by the first seeded
Irfan Fadhilah and
Weni Anggraini in the final. In early 2013, Widjaja started her partnership with the
2012 World junior champion,
Edi Subaktiar. The duo competed at the
2013 Asian Championships, but lost to South Korean pair
Ko Sung-hyun and
Kim Ha-na in the first round. At the
2013 Indonesia Open Grand Prix Gold, they failed to advance to the final stage, had upset by the six seeded
Praveen Jordan and
Vita Marissa in the semifinal. In 2014, Widjaja became the semifinalists at the
Malaysia Grand Prix Gold,
Indonesia Masters,
Bulgarian International,
Dutch Open with
Edi Subaktiar,
New Zealand Open with
Irfan Fadhilah, and at the
Indonesia International with
Alfian Eko Prasetya. In November 2014, she and Subaktiar clinched their first title at the
Grand Prix Gold tournament in
Macau Open. The duo then took the title at the
Austrian Open. Widjaja and Subaktiar made their first appearance at the semifinals of the
BWF Super Series event in
India Open, and at the
China Masters Grand Prix Gold, they grabbed the runner-up podium. In August 2015, she qualified to compete at the
World Championships in
Jakarta as the 12th seeded with Subaktiar. They finished in the third round, after defeated by the 8th seeded from South Korea
Ko Sung-hyun and
Kim Ha-na. In mid 2016, Widjaja paired with
Riky Widianto compete at the
Chinese Taipei Open, and the new pair finished in the semifinals round. In 2017, Widjaja teamed-up with the
2016 Olympic gold medalist
Tontowi Ahmad, but their partnership did not last long. Their best achievement was the semifinalist at the
Malaysia Masters. Widjaja then paired up again with
Edi Subaktiar, but due to injury suffered by Subaktiar at the
SEA Games, she's getting a new partner again with
Hafiz Faizal. They ended the 2017 BWF Season by achieve the semifinals in
Bitburger Open and
Korea Masters. In 2018, Widjaja comes up with
Hafiz Faizal, they showed their good performance by beat the seeded players to reach the semifinals round at the
Malaysia Masters, but their pace intercepted by the 5th seeded
Zheng Siwei and
Huang Yaqiong. At the
BWF Super 1000 Indonesia Open, they also finished in the semifinals. The partnership finally won their first title at the BWF Super 500
Thailand Open, beat the top seeded
Chris and
Gabby Adcock of England in the final with the score 21–12, 21–12. In 2019, Widjaja reached the finals of
German Open with
Hafiz Faizal, but they were defeated by South Korean pair
Seo Seung-jae and
Chae Yoo-jung in straight games. In April, Widjaja and Faizal beat the Olympic Games silver medalists
Chan Peng Soon and
Goh Liu Ying to reach the semi-finals of
Singapore Open, but they were stopped to another Malaysian pair
Tan Kian Meng and
Lai Pei Jing in a close rubber games. At the Oceania tour, she and her partner finished as the semi-finalists in
New Zealand and quarter-finalists in
Australian Open. Widjaja featured in Indonesian squad that won the bronze medal in
Sudirman Cup. In July, she and Faizal beat the world number 1 Zheng Siwei and Huang Yaqiong in the quarter-finals of
Japan Open, but the duo lost to their compatriot
Praveen Jordan and
Melati Daeva Oktavianti in the semi-finals. In August, she and her partner played at the
World Championships held in Basel, Switzerland, but this time they lost to Zheng and Huang in the third round. In the remaining of the 2019 tour, their best results were the semi-finalists in
Chinese Taipei and
Hong Kong Open. Widjaja and Faizal qualified to compete at the
World Tour Finals in Guangzhou, but only finished third in the group B standings. Widjaja and Faizal reached a career high as mixed doubles world number 6 in May 2019. In 2020, Widjaja started the season as the semi-finalists in
Malaysia Masters with her partner
Hafiz Faizal. Two weeks later, the duo finished as the finalist in
Thailand Masters lost to English pair
Marcus Ellis and
Lauren Smith in rubber games.
2022 In 2022, Widjaja formed a new partnership with
Dejan Ferdinansyah, after she was dismissed from the national team. In March, they played in
All England Open and lost in second round to four seeds and eventual winners
Yuta Watanabe and
Arisa Higashino of Japan. In the next tour,
Swiss Open, they lost in first round. In May, they lost in the second round of
Thailand Open from four seeds
Wang Yilyu and
Huang Dongping of China. They won their first title as a pair in the
Denmark Masters, and then clinched the home soil title in the
Indonesia International Series. They later won their third consecutive title as a pair at the
Vietnam Open where they defeated their compatriots
Rehan Naufal Kusharjanto and
Lisa Ayu Kusumawati in two games. In mid October, they clinched their fourth consecutive title by winning the Malang Indonesia International tournament. Their winning streak was then stopped by the Chinese pair
Jiang Zhenbang and
Wei Yaxin in the semi-finals of the
Indonesia Masters, and their ranking shot to the top 50 in the world. In mid November, they reach the semi-finals of the
Australian Open. They reached the career-highest ranking of 20 in the final weeks of 2022.
2023 In January, Widjaja with Ferdinansyah lost in the semi-finals of
Malaysia Open from first seed Chinese pair
Zheng Siwei and
Huang Yaqiong. In the next tour, they lost in the first round of
All England Open from fellow Indonesian and club mates
Praveen Jordan and
Melati Daeva Oktavianti in three games. In the next tour, they had to accept first round defeats in two consecutive tournaments at the
Swiss Open from fellow Indonesian pair
Rinov Rivaldy and
Pitha Haningtyas Mentari. In late April, Widjaja and Ferdinansyah competed at the
Asian Championships in
Dubai, United Arab Emirates, but had to lose in the semi-finals from Chinese pair
Jiang Zhenbang and
Wei Yaxin thus earn their first medal at the Asian Championships. In May, Widjaja alongside the Indonesian team competed at the
2023 Sudirman Cup in
Suzhou, China. She lost a match in the group stage, against
Dechapol Puavaranukroh and
Sapsiree Taerattanachai of Thailand. Indonesia advanced to the knockout stage but lost at the quarterfinals against China, where she almost upsetting the world no. 1
Zheng Siwei and
Huang Yaqiong in the first match with scrapped doubles partner
Rinov Rivaldy. In the following week, Widjaja and Ferdinansyah competed in the second Asian Tour at the
Malaysia Masters. Unfortunately, they were lost in the second round from 4th seed and eventual finalist Chinese pair
Feng Yanzhe and
Huang Dongping. In June, Widjaja and Ferdinansyah competed at the
Singapore Open, but had to lose in the first round from Danish pair
Mathias Thyrri and
Amalie Magelund. In the next tour, they competed at the home tournament,
Indonesia Open, but lost in the first round from 4th seed Korean pair
Seo Seung-jae and
Chae Yoo-jung. In July, Widjaja and Ferdinansyah competed at the
Korea Open, but had to lose in the second round from 6th seed Korean pair Seo Seung-jae and Chae Yoo-jung for second time in a row. In the next tour, they competed at the
Japan Open, but lost in the second round against 2nd seed Thai pair Dechapol Puavaranukroh and Sapsiree Taerattanachai in three games. In early August, Widjaja competed at the
Australian Open, but had to lose in the first round from fellow Indonesian pair
Rinov Rivaldy and
Pitha Haningtyas Mentari in rubber games. In late August, she competed at the
World Championships, but lost in the third round from 1st seed and reigning world champion Chinese pair
Zheng Siwei and
Huang Yaqiong in straight games. They then ended their losing streak in the early rounds by entering the final round in
Kaohsiung Masters, finishing on the podium as runners-up. The duo finally won their first title of the year in the
Syed Modi International, and closed the year as World number 14.
2024 Competing as an independent player, Ferdinansyah and his partner Widjaja not yet able to show their toughness in the international stage. Their best achievement in the first semester of 2024 were as quarter-finalists in the
Thailand Masters,
All England Open,
Thailand Open,
Malaysia Masters, and at the
Indonesia Open. In September, they reached the semi-finals in the
China Open, led him to 11th place in the world as his best ranking. The duo then reached the final in the
Macau Open, finished as runner-up to Chinese pairing
Guo Xinwa and
Chen Fanghui. == Achievements ==