APIBackend

$1,250Delivered in 1 week once your details are in30-day cover

What this package is

API is the foundation everything else sits on. I design the database around what you actually hold, write what your front end calls, and add sign-in with control over who reaches which part of the data.

The package covers up to eight kinds of record and fifteen things your front end can ask for, all named in the specification on the day we agree the work, with anything beyond that quoted before it happens. What you receive is not only code that runs: documentation your team opens in a browser and tries out for themselves, and automated checks that re-run every time somebody changes the code. Those two are what let another team carry the work on without phoning me.

Not included here: an admin console for non-developers, and payment work. Both are in the packages above.

See it working

The figures come from the real records, not from something typed inOn the left, the page you open every morning. On the right, the real data. Mark one as paid and watch the left.
TodayOwner
฿1,480Takings today
4New orders
2Unpaid
3New customers this month
Latest
#1043Malee Jaidee฿1,290Unpaid
#1042Piya Thongdee฿590Paid
#1041Napa Sangchan฿2,450Unpaid
#1040Thana Wongdee฿890Paid

This page is read only

Data in the systemThe system I build
RefCustomerAmountStatus
#1043Malee Jaidee฿1,290
#1042Piya Thongdee฿590Paid
#1041Napa Sangchan฿2,450
#1040Thana Wongdee฿890Paid

These four numbers are what an owner opens every morning. They are worked out from the real records each time the page loads, not typed in and updated by hand.

In this package the figures page is read only. An editing back office and historical charts are in the Admin package.

This mirrors the screen of the delivered system. Everything here lives in this page and is connected to nothing. The real thing calculates from your own database, and your front end can read the very same records.

Everything you get

This list is the entire scope of the package. Nothing is hidden in a contract.

Not included in this package
  • Front-end design and build. This service covers only what sits behind it. If you need both sides, look at the business website or the booking system, which ship with a front end.
  • Monthly server and third-party costs, paid from your own accounts so the system genuinely belongs to you. I estimate the figures before we start.
  • Migrating data out of an old system with a complicated structure. Ordinary spreadsheets I move for free; pulling through a legacy API is quoted separately and told to you first.
  • Mobile apps. That is the Android service, which can call the API built here.
  • A registered company on my side. I am one developer working under my own name in Thailand, and the contract is with me personally.

What I need from you before starting

Every question needs an answer, because these are the settings your system is built from. None of them can be skipped. If one is not settled yet, put down what you know today and we adjust it when work starts.

How the work runs

1

Send me what already exists

The front end you have built, the spreadsheet you run on, or the old system still in production. Any one of those is enough to start scoping.

2

We agree the data shape before code is written

You get the data structure and the list of what the system will do, to review first. Changing it as a document takes ten minutes. Changing it halfway through the build takes three days.

3

Your team uses the real thing while it is still being built

The system and its documentation open up in stages, so front-end work runs alongside rather than discovering a mismatch at the end.

4

Handover somebody else can pick up

Source code, API documentation, tests, deploy instructions and an admin manual, plus support after delivery.

Paying and getting started

Full price of this package$1,250
  • Paid in full at order The price is fixed and the scope is written out. No numbers appear later.
  • Work starts as soon as it lands No call to book and no quote to wait for.
  • 30 days of cover after delivery Anything wrong with my work is fixed at no charge.

Bank transfer or PromptPay. A receipt is issued every time, and a stamped work contract if you want one.

How to reach you

Questions about this package

What does the API documentation actually look like?

A web page listing every endpoint, what each one accepts and returns, with a button to fire a real call and see the result. Your front-end team works from it directly instead of booking a call with me each time.

Why do tests matter if it already works?

They do not matter on delivery day. They matter six months later when somebody changes the code. With tests they know immediately what broke. Without them they are afraid to touch it, and the system slowly becomes untouchable, which is the exact condition several clients arrive at my door with.

Why not just use Firebase or Supabase?

I use Supabase in plenty of projects and will recommend it if it fits. If your need is storing records and signing people in, off-the-shelf is better value and I will say so. Building it is worth the cost when there is business logic a template cannot express, or when the data is not allowed to sit on somebody else's service.

Our system is PHP. Do we have to change language?

No. If it is PHP and Laravel, I continue in that. Forcing a client onto whatever suits me means paying to rewrite a working system for nothing in return. Sample code in TypeScript, Laravel and Python is public and readable before you commit.

Who owns the code and the data?

You do. Code goes into your GitHub account from day one of the work, the database and servers live in your accounts, and I hold nothing hostage. Change developer whenever you like without asking me.

Often booked together

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