Six humans plus one AI agent.

We build custom AI systems for small and mid-size businesses, and we run our own company on the same kind of systems. Founded in 2023; the design and engineering team has worked together longer than that. Plus one AI agent: Simple, the front desk on this site.

The crew

The people you'll work with.

When you work with Simple4u, you're not getting passed to a junior account manager. The same people who built our open source platform, who run World Spa's systems every day, are the ones who build yours.

Viacheslav Nesterets, Owner and CEO of Simple4u
Founder
Slava (Viacheslav) Nesterets
Owner / CEO · Engineering Lead

Founder. The person you'll be on calls with. Three years embedded with WorldSpa across SEO, content, AI infra, video. Built the open source platform in this org.

More about Simple4u →
Yurii Shchemelov, Co-founder and COO of Simple4u
Co-founder
Yurii Shchemelov
Co-founder / COO

Co-founder. Operational backbone: brings people in, keeps engagements moving, holds the team accountable. Doesn't let things slip; pushes back when work needs to happen.

Nadiya Olefir, Project Manager at Simple4u
Nadiya Olefir
Project Manager

Project lead across client engagements. Translates ambiguous client asks into shippable scope, then keeps the team moving against it.

Ihor Zakharov, Web Designer at Simple4u
Ihor Zakharov
Web Designer

Web design lead. Takes the engineering and turns it into something people actually want to use. Long tenure across the agency's client work.

Hennadii Knyzhnyk, App Developer at Simple4u
Hennadii Knyzhnyk
App Developer

Application development. Mobile + native + integrations engineering for client product work.

Andrii Prylypko, Web Developer at Simple4u
Andrii Prylypko
Web Developer

Web platform engineering. Builds and maintains client sites, ships migrations, and runs the deployment infrastructure.

{ "name": "Simple", "role": "front desk", "loop": true }
AI · live
Simple
AI front desk

Answers visitors on our site from what we publish, says it is an AI, and passes requests to Slava. The same kind of front desk we build for venues.

Ask it → Our open source →
How it works

Three principles that shape every engagement.

These aren't slogans. They're the operational defaults that come up in every project decision.

Honesty over comfort

If a project should pivot, we say it. If a deliverable isn't going to compound, we say it. Hard truths early prevent wasted quarters later.

Shipped over perfect

Marketing and engineering both reward velocity. We ship working things at quality, then iterate, instead of polishing in private until the moment to ship has passed.

Memory persists

The longer you work with us, the smarter the system gets. Our agents and our team keep institutional memory of your business, and it stays yours: no lock-in.

Describe your business. Get the one-page plan.

It says what to build first, what it connects to, and the fixed price. Free, from the founder, within 48 hours.

Or book the call

Fifteen minutes, no deck. If we are not the right team, you will hear that on the call and get a name of who is.

Prefer to talk first: book a call with Slava Phone: (929) 640-6940 Email: office@simple4u.io Based in Brooklyn, NY. We work with clients anywhere; in New York we come to you.

Your message reaches the founder directly.