Credits the people behind mrJudge

Active Administrators

Gan Wei Liang (weiliang, HCI Alumni (JC2/2013))
Shen Xing Yang (shenxy13, NUS High Year 4/2020)
Teow Hua Jun (huajun, HCI JC2/2019)
Benson Lin Zhan Li (bensonlzl, HCI JC1 Wabbit/2019)
Ashley Aragorn Khoo (errorgorn, NUSH Year 3/2019)
Toh Jing En Daniel (dantoh, NUSH Year 2/2018)
Li Da (lida, NUSH Staff)
Ranald Lam Yun Shao (ranaldlys, RJ Alumni (2014))
Ryan See Weixuan (rs, RI Baby/2004)
Zhang Guangxuan (guangxuan, RI Sec 4/2015)
Daniel Choo Zhenghao (0rang3, RI Alumni/2021)
Leong Eu-Shaun (shaun6809, RI JC1/2019)
Li Yue Chen (lyc, NUSH Year 3/2018)
Damian Ho Xu Yang (damian, HCI JC2/2018)
Jamie Lim Jia Sin (jamielim, NUSH Year 0/2017)
Jeffrey Lee (jeff, NUSH Year 2/2015)
Clarence Chew Xuan Da (clarencechew, NUSH Year 3/2014)
Lim An Jun (limanjun, HCI Year 1/2019)
Han Jiatao Jerry (danq, RI Sec 2/2016)
Jiang Bowen (jiangbowen, RI Alumni/2020)
Ho Jie Feng (jiefeng, HCI Alumni (2016))
Tan Chien Hao (tch1001, RI Sec 3/2018)
Wong Swee Chong Dave (davewongsc, NUSH Year 5/2019)
Lorraine Neo (lorraineneo, RI Teacher)
Lim Li (limli, NUSH Alumni)
Pang Wen Yuen (wenyuen, RI Sec 4/2015)
Reporter (reporter, HCI Alumni)
Mark Theng (marktheng, HCI JC2/2014)
Xingchen Huang (lovemathboy, NUSH Year 5/2017)
Tan Likai (likai, Not IOI Trainer 2018)
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