Making Google 'Appsheet' based apps for tracking inventory, production planning, attendance

We are a medium sized manufacturing unit and currently using Google App sheet to track items like raw material inventory. We want to make 4 new apps to track the following

1) Raw Material
2) Daily production planning
3) Dispatch and bar coding
4) Housekeeping and cleaning

We are looking for coder well versed with App Sheet to make this and then mantain it on a monthly basis.