I build software for companies whose staff work at their clients' sites.

CTL Studio is my one-person software studio in Johor, Malaysia. My first product is OpenRoster: worker records and contracts today, rostering next.

See OpenRoster

Week of 12 October 4 sites, 11 staff

MonTueWedThuFriSatSun North gate Aiman07–15Aiman07–15Ravi15–23Ravi15–23Hafiz23–07Hafiz23–07 Warehouse 3 Kumar23–07Kumar23–07Siti07–15Siti07–15Daniel07–15Wei Jie15–23 Clinic lobby Mei Ling15–23Nurul07–15Nurul07–15Mei Ling15–23Jun23–07 Mall car park Farah07–15Hafiz15–23Daniel15–23Kumar23–07Jun23–07Farah07–15

Morning 07–15 Evening 15–23 Night 23–07

OpenRoster

Security guards, cleaners and other site staff are often managed with spreadsheets, chat groups and paper contracts. OpenRoster puts them in one place: each worker's records and documents, the clients and sites they go to, and contracts they sign online.

It is in early access now. Rostering, the part shown above, is what I am building next.

Visit openroster.app

Company details

CTL Studio is registered with the Companies Commission of Malaysia (SSM) as a sole proprietorship. I run it myself.

Legal name: Liew Chen Tong, trading as CTL Studio
SSM registration: 202603269827 (PG0594604-U)
Registered: 9 October 2026
Location: Johor, Malaysia
Contact: liewchentong@ctlstudio.dev