Backend Development and APIs: The Part Nobody Sees

In most organizations the backend question arrives as a practical annoyance rather than a technical one. The spreadsheet has split into two files and nobody is certain which one is right. Orders pile up in a Telegram group and somebody copies them into a table by hand. Checking what is left in stock means phoning the salesperson. Or the reverse: the interface is finished but there is no server behind it, so nothing is stored and no report exists. In both cases the work goes by the same name: write the business process down in code and keep it in one place.

What a Backend Does, in Business Terms

A backend does three things. It stores data in one place and in one format. It enforces rules: who may grant a discount, when an order can be cancelled, when a debt appears, which date a report is built on. And it exposes that data and those rules through a defined interface — an API. The screen a user sees rests on those three.

This is also where a mistake that costs time hides: rules written into the interface. Say the discount ceiling is checked only in the browser form. One day a report shows a different figure, because the mobile app or an older page went around that check. When the rule lives in the backend, it is one rule for every channel: site, app, admin panel and report all read from one source.

• Database structure: what is stored, which fields are required, whether a deleted record really disappears or moves to an archive.
• Business rules: price, discount, status changes, debt tracking — all written down in one place.
• Access rights: a salesperson, a cashier, a director and an accountant do not see the same screen.
• API: how the mobile app, the website and outside systems read and write data.
• Activity log: who changed what, and when.

When an API-First Design Pays Off

API-first means agreeing the external interface of the system before building any screens. How the create-order operation is called, what comes back, and what appears when it fails are settled before design starts. That is extra work up front, which is why it is not always the right call.

If the plan holds nothing beyond one website and one admin panel, designing the API as a product of its own is overhead. If at least two of the signals below apply, it earns its keep.

• The same data appears in several places: website, mobile app, admin panel, reports.
• The frontend and the backend are updated at different times, sometimes by different people.
• An exchange with an outside system is planned — stock, accounts, delivery or a partner platform.
• Only the website is being built now, but a mobile app sits in a future plan.

Documenting the API early has a second benefit: the document becomes the agreement. Once each operation states what it accepts and what it returns, the argument about who understood what gets shorter. Ask for it in the first weeks of a project, not at the end.

Data Safety and Access Control

Security is not a separate block in a backend; it sits inside the structure. In practice it reduces to two questions: who can see the data and who can change it. In most systems the trouble comes not from an attack but from rights granted too widely — a departed employee whose old password still downloads the customer list.

The points below are worth pinning down with whoever builds it. Answers belong in a document, not in conversation.

• The list of roles, and the boundary of data each role can see.
• How passwords and sessions are stored, and whether two-factor sign-in is planned.
• How customer phone numbers, payment details and contract files are protected.
• How often a backup is taken, and whether restoring it has actually been tested.
• Whether there is a change log, so that who deleted what can be established afterwards.
• Who keeps the access keys to the server and the database once the system is handed over.

System Integration: Working With What Is Already There

System integration is rarely clean work. The two sides usually name things differently: a customer here is a counterparty there; a phone number sits in one column here and two columns there. That is why integration starts with reconciling the data on both sides rather than with connecting code.

Three Things to Settle Before Integrating

1. Which system is the source of truth. If a customer record changes in two places, whose version wins. Without that agreement the two databases drift apart.
2. How the exchange runs: sent immediately on every change, or collected once a day in a batch. The second is simpler and often sufficient.
3. Whether the other side has an API at all, or only file export. If it is export only, accept in advance that some of the work stays manual.

One condition is worth having the builder confirm before anything is connected: when the outside system stops answering, yours must not stop with it. A call that gets no reply should be retried later, and the failure written to a log. Otherwise a single outage elsewhere halts a whole working day.

How a System Becomes Impossible to Hand Over

The failure mode here is a system that depends on one person. It runs, but only the person who wrote it understands it. There is no documentation, the server settings live on somebody's laptop, and the database structure is described nowhere. When such a system needs updating, rewriting it from scratch often turns out easier. The list that prevents this is short.

1. The code sits in a repository on your account, not on a developer's personal one.
2. The database structure and its changes are stored alongside the code, not as commands somebody ran by hand.
3. There are instructions for running the project from scratch, and they have been tested on a second machine.
4. Environment settings and keys are separated from the code, and the list of them is documented.
5. API documentation exists, even when the API is only used by your own website.

Ask for that list at the start of the work rather than at the end, because adding it afterwards almost never happens.

What to Bring to the First Conversation

No technical document is needed. What is needed is the current state of the process. With the five answers below, the conversation starts from facts instead of guesses.

• Which process hurts, and how many times a day it repeats.
• Where the data lives now: a spreadsheet, a paper book, Telegram, an existing program, or all of them at once.
• Who will work in the system, and which data each of them needs.
• Which existing system must be connected, and which one merely should be.
• What changes a year from now: a second branch, a mobile app, a new service line.

How We Approach Backend Development

FAZO is a digital product studio in Tashkent, Uzbekistan. Our backend work stands on three points: API-first architecture, database optimization and security, and third-party integrations — a standing part of the work rather than an addition to it. The list of technologies is deliberately short: Node.js, TypeScript, PostgreSQL, REST API, Docker, Firebase. The team includes a developer who builds backend architecture, REST APIs, database schemas and authentication in Django, and a cyber-security specializt. We write code meant to be read and continued: clean code, modular structure, security.

From the work behind us: CRM Savdo Pro — a warehouse and sales CRM covering stock movement, sales analytics, a customer database and reports, with the recorded result that the sales process became three times faster. Shashlik House — an online restaurant menu with ordering and an admin panel, with the recorded result that online orders increased by 200%. Bug Bounty Platform — a web system for security researchers.

1. Discovery. We analyze your business goals, define the architecture and map out a clear project roadmap.
2. Design. Screens and user flows are built as a system — every screen designed with intent.
3. Development. Clean code. Modular structure. Security. Long-term maintainability is a requirement, not a preference.
4. Launch. Deployment, performance monitoring and continuous support. We stay with you long after go-live.

Structured updates go out weekly, milestones are explicit, and technical decisions are explained rather than announced. If you have a process that is done by hand today and produces errors, or an interface left without a server behind it, describe it: which process, who uses it, where the data sits now. Transparent process, structured milestones, technical clarity and long-term support — our work rests on those four. To start a project, fill in the form or write to us on Telegram.