# Jones Ralfy Jansen

Jones Ralfy Jansen (born 28 April 1992) is an Indonesian-born German badminton player who currently represents Germany. He was a former PB Djarum players and has joined that club in 2007. In 2010, he awarded as the best Djarum player. He won his first senior international title at the 2013 Portugal International tournament in the mixed doubles event partnered with Keshya Nurvita Hanadia. He also won the 2014 Finnish and Turkey International tournaments with his sister Cisita Joity Jansen.

## Personal life

His father Joy Jansen is German, while his mother Meity Rumayar is Indonesian. He was born and raised in Indonesia with his elder sister Cisita Joity Jansen who is also a badminton player.

## Achievements
### Asian Junior Championships

Boys' doubles
| Year | Venue | Partner | Opponent | Score | Result |
| 2010 | Stadium Juara, Kuala Lumpur, Malaysia | Dandi Prabudita | Ow Yao Han Yew Hong Kheng | 10–21, 7–21 | Bronze |

### BWF Grand Prix (1 runner-up)

The BWF Grand Prix had two levels, the Grand Prix and Grand Prix Gold. It was a series of badminton tournaments sanctioned by the Badminton World Federation (BWF) and played between 2007 and 2017.
Men's doubles
| Year | Tournament | Partner | Opponent | Score | Result |
| 2016 | Brasil Open | Josche Zurwonne | Michael Fuchs Fabian Holzer | 19–21, 18–21 | Runner-up |
    BWF Grand Prix Gold tournament
    BWF & IBF Grand Prix tournament

### BWF International Challenge/Series (12 titles, 8 runners-up)

Men's doubles
| Year | Tournament | Partner | Opponent | Score | Result |
| 2012 | Slovenian International | Andreas Heinz | Zvonimir Đurkinjak Zvonimir Hölbling | 21–17, 17–21, 12–21 | Runner-up |
| 2014 | Polish International | Daniel Benz | Adam Cwalina Przemysław Wacha | 8–11, 11–6, 5–11, 11–8, 9–11 | Runner-up |
| 2016 | Estonian International | Josche Zurwonne | Martin Campbell Patrick MacHugh | 21–15, 21–18 | Winner |
| 2016 | White Nights | Josche Zurwonne | Bastian Kersaudy Julien Maio | 21–15, 21–14 | Winner |
| 2016 | Irish Open | Josche Zurwonne | Liao Min-chun Su Ching-heng | 27–25, 23–21 | Winner |
| 2016 | Italian International | Josche Zurwonne | Richard Eidestedt Nico Ruponen | 21–17, 21–18 | Winner |
| 2019 | Finnish Open | Peter Käsbauer | Muhammad Shohibul Fikri Bagas Maulana | 17–21, 17–21 | Runner-up |
| 2019 | Lagos International | Peter Käsbauer | Arjun M.R. Ramchandran Shlok | 21–11, 21–8 | Winner |
| 2019 | Irish Open | Peter Käsbauer | Alexander Dunn Adam Hall | 21–19, 17–21, 21–18 | Winner |
| 2022 | Uganda International | Jan Colin Völker | Boon Xin Yuan Wong Tien Ci | 15–21, 14–21 | Runner-up |
| 2022 | Mexican International | Jan Colin Völker | Shuntaro Mezaki Haruya Nishida | 15–21, 16–21 | Runner-up |
| 2023 | Egypt International | Kenneth Neumann | Louis Ducrot Quentin Ronget | 14–21, 17–21 | Runner-up |
Mixed doubles
| Year | Tournament | Partner | Opponent | Score | Result |
| 2013 | Portugal International | Keshya Nurvita Hanadia | Anders Skaarup Rasmussen Lena Grebak | 21–16, 18–21, 21–16 | Winner |
| 2013 | Slovenian International | Cisita Joity Jansen | Zvonimir Đurkinjak Staša Poznanović | 12–21, 18–21 | Runner-up |
| 2014 | Finnish International | Cisita Joity Jansen | Alexandr Zinchenko Olga Morozova | 15–21, 21–17, 21–16 | Winner |
| 2014 | Turkey International | Cisita Joity Jansen | Marcus Fernaldi Gideon Gabriela Stoeva | 17–21, 21–17, 21–12 | Winner |
| 2015 | Romanian International | Cisita Joity Jansen | Tarun Kona N. Sikki Reddy | 7–11, 8–11, 4–11 | Runner-up |
| 2022 | Ukraine Open | Linda Efler | Jan Colin Völker Stine Küspert | 21–12, 21–11 | Winner |
| 2023 | Egypt International | Julia Meyer | Koceila Mammeri Tanina Mammeri | 21–19, 21–18 | Winner |
| 2024 | Estonian International | Thuc Phuong Nguyen | Ludwig Axelsson Jessica Silvennoinen | 21–14, 21–18 | Winner |
    BWF International Challenge tournament
    BWF International Series tournament