Credits the people behind mrJudge

Active Administrators

Clarence Chew Xuan Da (clarencechew, NUSH Year 3/2014)
Damian Ho Xu Yang (damian, HCI JC2/2018)
Shen Xing Yang (shenxy13, NUS High Year 4/2020)
Daniel Choo Zhenghao (0rang3, RI Alumni/2021)
Lim Li (limli, NUSH Alumni)
Benson Lin Zhan Li (bensonlzl, HCI JC1 Wabbit/2019)
Zhang Guangxuan (guangxuan, RI Sec 4/2015)
Pang Wen Yuen (wenyuen, RI Sec 4/2015)
Jamie Lim Jia Sin (jamielim, NUSH Year 0/2017)
Han Jiatao Jerry (danq, RI Sec 2/2016)
Ashley Aragorn Khoo (errorgorn, NUSH Year 3/2019)
Ryan See Weixuan (rs, RI Baby/2004)
Toh Jing En Daniel (dantoh, NUSH Year 2/2018)
Jeffrey Lee (jeff, NUSH Year 2/2015)
Teo Por Loong, Jacob (jacob, NUSH Year 3/2015)
Ranald Lam Yun Shao (ranaldlys, RJ Alumni (2014))
Leong Eu-Shaun (shaun6809, RI JC1/2019)
Jiang Bowen (jiangbowen, RI Alumni/2020)
Li Da (lida, NUSH Staff)
Robin Christopher Yu (robinyu, Xavier School Batch 2017)
Dr. Steven Halim (steven, SG IOI Team Leader)
Nguyen Dinh Quang Minh (mofk, NUS)
Wong Swee Chong Dave (davewongsc, NUSH Year 5/2019)
Ho Jie Feng (jiefeng, HCI Alumni (2016))
Tan Likai (likai, Not IOI Trainer 2018)
Li Yue Chen (lyc, NUSH Year 3/2018)
Reporter (reporter, HCI Alumni)
Teow Hua Jun (huajun, HCI JC2/2019)
Xingchen Huang (lovemathboy, NUSH Year 5/2017)
Lorraine Neo (lorraineneo, RI Teacher)
Gan Wei Liang (weiliang, HCI Alumni (JC2/2013))
Chang Si Yuan (siyuan, RI Sec 3/2014)

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