simify.dev
Software developer in Phuket building useful business software
Sim Kritamook is a freelance software developer based in Phuket, Thailand, focused on booking systems, internal tools, dashboards, and custom software that helps businesses run faster and more reliably.
Based in Phuket, available remotelyBooking systems, internal tools, and product engineering by Sim
7+Years building digital products
3Core systems featured here
Booking + OpsMain product domains
For badminton court owners
Online booking built for Thai court owners
Stop managing bookings over LINE. Replace the back-and-forth with a system that handles reservations, payments, and reminders — so you can focus on running the court.BeforeBookings over LINE, forgotten slots, double-booked courts, daily manual fixes
AfterCustomers book online 24/7, system prevents conflicts, no manual intervention
BeforeNo visibility into which courts are free — owners have to check a notebook or guess
AfterLive availability calendar visible to owner and staff at any time, any device
BeforeBank transfers verified by hand — hard to track who paid and who didn't
AfterOnline payment on booking, automatic confirmation, revenue dashboard included
BeforeManually remind every customer before their session — no-shows still happen
AfterAutomatic reminders sent before every session — no-shows drop without any work
“Before this, I was managing everything through LINE. Sometimes I forgot to block a slot, sometimes two customers booked the same court. It was a mess I had to clean up every single day. Since using this system, those problems are completely gone. Customers book themselves, I can see everything, and the revenue reports save me hours every week.
Badminton court ownerPhuket, Thailand — first customer
Working with teams in Phuket and remotely
Hire a software developer in Phuket for product and systems work
I work with local businesses, startups, and distributed teams that need help building booking platforms, internal tools, admin dashboards, and custom business software.If you are searching for a software developer in Phuket or a freelance full-stack developer in Thailand, this portfolio highlights the kind of systems work I focus on.Explore the work I do most
If you are looking for a software developer in Phuket, these pages are the best place to start. They cover the kinds of systems I build most often and how I approach them.Software developer in Phuket
What I build for businesses on the island, how projects run, and what it costs to start.Hire a developer in Phuket
A practical overview of how I work with local businesses, startups, and remote teams.Booking systems
How I design booking flows, admin tools, and operational logic for service businesses.Internal tools
Why custom internal software often creates the biggest day-to-day business gains.Featured Projects
Badminton Court Booking System
Commission System
A commission workflow system for managing requests, tracking progress, handling approvals, and keeping all project updates in one place.