Credits the people behind mrJudge

Active Administrators

Ryan See Weixuan (rs, RI Baby/2004)
Ranald Lam Yun Shao (ranaldlys, RJ Alumni (2014))
Tan Likai (likai, Not IOI Trainer 2018)
Feng Jiahai (jiahai, RI Sec 4/2014)
Reporter (reporter, HCI Alumni)
Dr. Steven Halim (steven, SG IOI Team Leader)
Li Yue Chen (lyc, NUSH Year 3/2018)
Wong Swee Chong Dave (davewongsc, NUSH Year 5/2019)
Zhang Guangxuan (guangxuan, RI Sec 4/2015)
Lim Li (limli, NUSH Alumni)
Li Da (lida, NUSH Staff)
Damian Ho Xu Yang (damian, HCI JC2/2018)
Xingchen Huang (lovemathboy, NUSH Year 5/2017)
Wang Zhi Jian (zhijian, HCI Alumni/2015)
Tan Chien Hao (tch1001, RI Sec 3/2018)
Pang Wen Yuen (wenyuen, RI Sec 4/2015)
Clarence Chew Xuan Da (clarencechew, NUSH Year 3/2014)
Teow Hua Jun (huajun, HCI JC2/2019)

Active Maintainers

Technical:

Ranald Lam
Gao Shan Sam
Lin Si Jie
Pang Wen Yuen

Content and Problems:

Pang Wen Yuen (RI)
Chang Si Yuan (RI)
Lim Li (NUSH)
Clarence Chew (NUSH)
Wang Zhi Jian (HCI)
Ho Jie Feng (HCI)

Developers

mrJudge 2009: Raymond Kang
mrJudge 2013: Ranald Lam
Pang Wen Yuen
mrJudge 2014 / mrJudge: Ranald Lam
Gao Shan Sam
mrJudge 2015 (Grading Backend): Ranald Lam
Gao Shan Sam