Credits the people behind mrJudge

Active Administrators

Damian Ho Xu Yang (damian, HCI JC2/2018)
Ryan See Weixuan (rs, RI Baby/2004)
Benson Lin Zhan Li (bensonlzl, HCI JC1 Wabbit/2019)
Teo Por Loong, Jacob (jacob, NUSH Year 3/2015)
Zhang Guangxuan (guangxuan, RI Sec 4/2015)
Jamie Lim Jia Sin (jamielim, NUSH Year 0/2017)
Toh Jing En Daniel (dantoh, NUSH Year 2/2018)
Li Da (lida, NUSH Staff)
Reporter (reporter, HCI Alumni)
Shen Xing Yang (shenxy13, NUS High Year 4/2020)
Daniel Choo Zhenghao (0rang3, RI Alumni/2021)
Ashley Aragorn Khoo (errorgorn, NUSH Year 3/2019)
Eric Li (eric, RI JC1/2020)
Tan Likai (likai, Not IOI Trainer 2018)
Lim Li (limli, NUSH Alumni)
Pang Wen Yuen (wenyuen, RI Sec 4/2015)
Ho Jie Feng (jiefeng, HCI Alumni (2016))
Nguyen Dinh Quang Minh (mofk, NUS)
Dennis Suherman (dennis, RI J2/2014)
Ranald Lam Yun Shao (ranaldlys, RJ Alumni (2014), NOI Technical Comm)
Clarence Chew Xuan Da (clarencechew, NUSH Year 3/2014)
Teow Hua Jun (huajun, HCI JC2/2019)
Xingchen Huang (lovemathboy, NUSH Year 5/2017)
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