Custom Software Development

Want custom software
built for your business?

Tell us what it should do. We design it, build it, connect it to the systems you already use — accounts, billing, panels, integrations — and keep it running after launch. In one language or several. You own the code and it runs on your servers.

Tell us your idea See our main service
0 subscriptions billed
on software we wrote
0 accounts
on our own auth system
0 products
sharing one backend
0 languages
one codebase

Not a portfolio — this is the system running behind our own products right now.

Platforms we built and run

Not screenshots in a deck — every address below opens a system that is working today.

zagorasaw.com zagorasaw.com B2B product catalogue Visit site kidswearworld.com kidswearworld.com Wholesale store with dealer pricing Visit site emsalo.com emsalo.com Company data platform Visit site apartbul.com apartbul.com Listings marketplace Visit site hospitalim.com hospitalim.com Searchable directory Visit site astpro.com.tr astpro.com.tr B2B dealer portal Visit site
One engine, 13 separate sites

A car-valuation platform we built once and now runs under 13 different brands, each with its own domain, design and admin panel. Multi-tenant, multi-brand, one codebase — if that is the shape of your problem, we have already solved it once.

Sound familiar?

Most people who write to us are in one of these situations.

You need to start charging. The product works, but accounts, plans, renewals and failed payments are a wall you have not climbed yet.

Your developer disappeared. Something works, nobody knows how, and every small change now feels like a risk nobody wants to take.

You are running a business on spreadsheets. It worked at ten customers. At two hundred it is costing you hours every week and mistakes.

Two systems that will not talk. Your tools each hold half the truth, and somebody copies data between them by hand every day.

It got slow as it grew. What was fine with a small database now times out, and nobody has time to find out why.

You cannot see what is happening. No dashboard, no numbers — decisions get made on a feeling instead of what the data says.

If one of these is you, tell us about it — we will tell you honestly whether we are the right people for it.

What we can build for you

Not enterprise theatre — software small enough to understand and finish.

Subscriptions and billing

Sign-up, plans, free limits, upgrades, renewals, refunds and failed-payment recovery. We run exactly this on our own products, for thousands of paying users.

The panel you actually use

An admin built around your daily work, not a generic CRUD screen. Customers, revenue, exports, the numbers you check every morning — in one place.

APIs and integrations

Connecting systems that were never designed to meet: payment providers, mail platforms, analytics, your own tools. Webhooks that do not silently drop events.

Multi-brand, multi-language

The same system under several brands, domains or countries, each in its own language. We run exactly that on 13 sites sharing one engine.

Rescuing what exists

Taking over an undocumented codebase, finding why it breaks, making it safe to change again. Often cheaper than starting over — we will tell you if it is not.

The work nobody should do by hand

Scheduled jobs, imports and exports, reminder e-mails, reports that land in your inbox instead of waiting to be pulled. Quiet work that saves hours every week.

Why trust us with it

Anyone can write code. The risk is what happens after you pay for it.

We pay our own bills with this

The billing, accounts and admin we would build for you are the same ones charging 2,373 subscribers today. When something breaks there, it is our revenue — so it is built to survive, not to demo well.

We tell you when not to build it

Half the requests we get are cheaper to solve with a tool that already exists. We would rather say that than sell you months of work you did not need.

Your data stays yours

Deployed on your servers and your accounts, with the source in your hands. No lock-in, no licence that expires, no hostage situation later.

When it breaks, someone answers

Payment providers change APIs, platforms tighten rules, servers move. We have handled exactly that on live systems with real money flowing through them.

What happens after you write to us

No month of silence, no surprise invoice at the end.

01

We talk it through

What it should do, who touches it, what already exists. Most projects get smaller here — and cheaper. If a ready-made tool solves it, you hear that now.

02

You see it early

A working version you can click through before the polish. Changing direction here costs a conversation. Changing it after launch costs a lot more.

03

We build the real thing

Edge cases, error states, permissions, the reports you will actually open. You see it progress as it happens — not one big reveal at the end.

04

It goes live on your side

Deployed to your servers and your accounts, with the source handed over. Migration from whatever you use today is part of the job, not an extra.

05

You are not left alone with it

Dependencies age, providers change APIs, your business changes. We stay reachable for the part most agencies treat as someone else's problem.

Before you write to us

The questions that come up in almost every first email.

What size of project do you take?

Ones a small team can finish and keep running. If your project needs twenty people and two years, we are the wrong choice and we will say so in the first email.

How is pricing decided?

Per project, after we understand the scope. We will tell you honestly if what you want is simpler than you think — or if an existing tool already does it.

Who owns the code?

You do. It runs on your servers and your accounts, and the source is yours from the first day — not after the final payment.

Can you take over an existing system?

Yes. Undocumented code, a developer who left, a build nobody dares to touch — familiar territory. We read it first and tell you whether it is worth saving.

Do you handle payments properly?

It is the part we know best. Plans, proration, renewals, chargebacks and recovery of failed payments are running on our own products for 2,373 subscribers.

What if we need changes later?

Expected. The code is written to be changed by someone else, and we stay reachable — you are not forced back to us to fix a typo.

Tell us what you want built

A few sentences is enough to start. We will tell you what it takes — and if we are not the right people for it, we will say that instead of selling you something.

Tell us your idea

Contact Us

contact@addonschrome.com