Oleg Katrichuk

Web development services

One full-stack engineer, end to end — from a marketing site to a multi-tenant SaaS. Scope and price agreed up front, in writing. You pay after launch, not before.

What I build

01

Business & marketing websites

Fast, SEO-ready sites on your own domain — multilingual, accessible, and built to rank. The asset you own, not a rented profile.

02

Web applications

Dashboards, portals and internal tools with a .NET backend and a React / Next.js frontend. Real auth, real data, production-grade from day one.

03

SaaS MVPs

From idea to a live product real customers can pay for — multi-tenant architecture, billing, and the boring infrastructure that lets it scale later.

04

APIs & integrations

Clean, documented REST APIs, third-party integrations and data pipelines. The plumbing that connects your product to everything else.

05

Rescue & refactor

Inherited a codebase that nobody can safely change? I stabilise it — tests, observability, and a path back to shipping features without fear.

06

Ongoing partnership

After launch I stay available for updates, SEO and promotion — for as long as you need a hand. The relationship doesn't end at hand-off.

The stack

C# / .NET, ASP.NET, EF Core, Clean Architecture & CQRS on the backend; TypeScript, React and Next.js on the frontend; PostgreSQL and Docker underneath. Battle-tested choices, not whatever's trending this month.

How we'd work

  1. 01

    Scope, in writing

    We agree exactly what gets built and what it costs before any code — no creeping invoice, no surprises.

  2. 02

    Ship in slices

    Working software every week, not a big-bang reveal at the end. You see progress and can change course early.

  3. 03

    Pay after launch

    You pay once the project is live and you're happy with it. No upfront deposit.

Questions clients ask

How much does a website or web app cost?

It depends on scope, which we fix in writing before starting. A marketing site is a different number from a multi-tenant SaaS. You get one agreed price up front — no hourly creep — and you pay it after launch.

How long does it take?

A focused marketing site is usually a couple of weeks; a web app or SaaS MVP, a few weeks to a few months depending on scope. Because I ship in weekly slices, you see working software the whole way through, not just at the end.

Do you work with clients in my country?

Yes — remote, with clients in the US, EU, Ukraine and the CIS. I work in English, Ukrainian and Russian.

What if I already have a half-built project?

I take on rescue and refactor work. I'll assess what's there, stabilise it with tests and observability, and get you back to shipping features safely.

Will I be able to maintain it after?

Yes. You get clean, documented code and a proper hand-off — and I stay available for updates and SEO if you'd rather not. Day-to-day content changes are usually content, not code.

Have a project in mind?

Tell me what you're building and where it's stuck. I usually reply within a few hours.