Senior engineering studio · Estonia & EU

We build the softwareAI can't.

A senior engineering studio building custom software, web platforms, Shopify apps, and AI automations — production-grade, shipped in weeks, not quarters. Fixed scope, fixed price, direct access to the engineer.

Production-grade & deployed
Direct access to the engineer
Fixed scope, fixed price
3 days
SplitFlow built & shipped
200+
Countries served (esimystic)
100/100
Lighthouse performance
10
Languages shipped

Real systems, shipped & running in production

SplitFlowesimystic.comtomberg.techkaasani-kirik.ee
What we build

The complex 20% templates can't do

AI and no-code crush the easy stuff. We build the systems that actually have to work — and we ship them fast, at a fixed price.

from €6,000

Custom Software & Platforms

Full-stack web apps, MVPs, dashboards, internal tools and e-commerce platforms — the complex, integrated systems that templates and no-code can't deliver. Architected to run in production.

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from €3,000

Custom Shopify Apps

Need your store to do something no app on the market does? We build production Shopify apps — rule engines, order automation, billing, webhooks, GDPR — for the App Store or your store privately. (See SplitFlow.)

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from €4,000

AI Automation

Custom AI workflows and agents that remove real hours from your week — data processing, support triage, content pipelines, internal copilots — wired into the tools you already use.

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from €900

Websites & SEO

High-performance marketing sites that hit 100/100 Lighthouse and rank on Google — like this site and tomberg.tech. When you need a site, not a system.

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Built with a modern, production-grade stack
TypeScriptReactNext.jsNode.jsPrismaPostgreSQLShopifyDockerAI / LLMs
Case study · Shopify App

A production Shopify app, built in 3 days

SplitFlow automatically splits Shopify orders by rules the merchant sets — by vendor, SKU, weight, tag and more. Not a prototype: a real app with a billing system, GDPR compliance webhooks, background reconciliation, and a full merchant dashboard — reviewed by Shopify and published on the App Store. Proof of how fast a senior studio ships something real.

Rule engine + audit log
Subscription billing
GDPR compliance webhooks
Live on the App Store
SplitFlow
Shopify order automation
idea → App Store3 days
stackReact Router · Prisma
statusIn review · Live infra
⚡ 3-day build
Our work

Proof, not promises

Real, running systems you can visit right now — from a Shopify app to a multi-country e-commerce platform.

S
Shopify AppBillingWebhooks

SplitFlow

A production Shopify app — rule-based order splitting with subscription billing, GDPR compliance, and background reconciliation. Built in 3 days, and now live on the Shopify App Store.

E
PlatformPaymentsiOS & Android

esimystic.com

A full e-commerce platform in 10 languages with live payments, an admin panel, and native iOS & Android apps — live in the App Store and Google Play. Serving 200+ countries.

T
SEOPerformance100/100

tomberg.tech

A performance-obsessed site that ranks on Google's first page with a 100/100 Lighthouse score. SEO and Core Web Vitals done right.

K
CMSDonationsAccessibility

kaasani-kirik.ee

A multilingual CMS for a historic Estonian church — event calendar, sermon archive, and its first-ever online donation system. Accessible and fast.

Want a system like these for your business?

Why YTI Digital

Senior engineering, without the agency overhead

You get the person who actually builds the software — fast, direct, and accountable. Agency-quality output at roughly half the agency cost.

Shipped in weeks, not quartersA senior engineer with modern tooling and AI leverage moves fast. SplitFlow — a full Shopify app with billing and GDPR — was built in 3 days and is now live on the Shopify App Store.
Production-grade, not a demoReal error handling, real edge cases, deployed and maintained. Software that survives contact with real users — the hard 20% AI and templates skip.
Talk to the engineer, not salesNo account managers, no agency handoffs, no jargon. You work directly with the person building your software — async and in writing.
Fixed scope & priceYou know the scope and the price before we start. Agency-quality output at roughly half the agency cost, without the runaway-hours risk.
FAQ

Questions, answered honestly

What things cost, how long they take, and how we work.

How much does a custom Shopify app cost?

Simple private apps start around €3,000. Multi-feature apps with a merchant dashboard and a real integration typically run €8,000–20,000. We give you a fixed price after a short scoping call — SplitFlow, our own app on the Shopify App Store, is an example of what we build.

How long does an MVP or custom app take?

Weeks, not quarters. As a senior solo studio using modern tooling and AI leverage, we ship fast — SplitFlow, a production Shopify app with billing and GDPR, was built in 3 days and passed Shopify's review onto the App Store. Most MVPs land in 4–6 weeks.

Do you work with clients outside Estonia?

Yes. We're based in Estonia (YTI Digital OÜ) and work with clients across the EU and internationally — fully async and in writing, no calls required.

How does your pricing work?

Fixed scope, fixed price — no hourly surprises. Every project starts with a free scoping call and a written proposal. Larger builds begin with a short paid discovery sprint, credited toward the build.

What technology do you use?

Modern, production-grade tooling: TypeScript, React, Next.js, Node, Prisma and PostgreSQL, Docker, Shopify's app framework, and AI/LLM tooling where it earns its place. Built to run and be maintained — not just to demo.

Can you take over an existing or AI-generated codebase?

Yes. We often pick up half-finished or AI-generated projects that got stuck on the hard 20% — auth, payments, integrations, reliability, deployment — and get them shipped.

Tell us what you're building

Book a free 30-minute scoping call. We'll tell you honestly whether we can build it, how, and what it costs — no pressure, no sales pitch.

Response within 24 hours • Written & async • No spam