Skip to main content

Technical Architecture · Shopify · SaaS

I architect scalable Shopify & SaaS systems for growing European e‑commerce brands.

From custom Shopify builds to full SaaS platforms—I design and engineer the technical infrastructure that lets serious e‑commerce businesses scale with confidence.

Discuss Your Project View Services

Core Expertise

Systems thinking, not just code.

I bring architecture-level thinking to every engagement—from Shopify theme builds to multi-service SaaS platforms with EU compliance built in.

Shopify Architecture

Custom themes, app integrations, checkout optimization, and headless builds for brands that have outgrown templates.

SaaS Engineering

Multi-tenant platforms, subscription billing, API-first architecture, and user management systems built to scale.

EU Compliance & VAT Logic

OSS VAT, reverse charge, multi-currency invoicing, and automated tax reporting for European market operations.

Backend Systems

Node.js services, REST and GraphQL APIs, microservice architectures, and reliable data pipelines.

Infrastructure & DevOps

AWS infrastructure, CI/CD pipelines, containerized deployments, monitoring, and automated scaling strategies.

Technical Strategy

Architecture reviews, technology roadmapping, system audits, and long-term technical planning for growing businesses.

Strategic Services

What I build.

Structured service areas designed for businesses that need more than a developer—they need a technical partner.

01

Shopify Architecture

Custom theme development, app integrations, checkout optimization, and headless Shopify builds for brands that need performance, flexibility, and a system designed to grow with them.

Learn more
02

Custom SaaS Development

Full-stack SaaS platforms with multi-tenancy, subscription billing, user management, and API-first architecture—designed for reliability and scale.

Learn more
03

EU VAT & Billing Logic

Tax-compliant billing systems for European markets—OSS VAT, reverse charge mechanisms, multi-currency invoicing, and automated tax reporting that keeps your business compliant.

04

Infrastructure & Automation

AWS infrastructure, CI/CD pipelines, monitoring dashboards, and automated deployment workflows that keep your systems reliable at scale.

Learn more
05

Long-Term Technical Partnership

Ongoing architecture consulting, code reviews, system optimization, and strategic technical guidance as your business grows—not just a one-time build.

Track Record

Built for scale. Trusted by brands.

Over a decade of building production systems across e-commerce, SaaS, and enterprise infrastructure.

15+
Years of Engineering
20+
Shopify Stores Architected
5+
Countries Served
4
Industries

E-Commerce & Retail · SaaS & Technology · Health & Wellness · Food & Beverage

Selected Systems

A few things I've built.

From Shopify storefronts to custom SaaS platforms—each project is architected for the business it serves.

Flagship product · Built & operated by me

Moj Račun

The free Slovenian invoicing platform I designed, built, and run end-to-end.

FURS-verified invoices, A4 & POS printing, customer CRM, expense tracking, and reporting—used daily by Slovenian sole proprietors and small companies. Built on Node.js, Vue, MongoDB, and AWS, in production.

  • FURS fiscal verification
  • A4 + POS printing
  • Customer CRM
  • Expense tracking
  • Cloud-based
  • 100% free
Visit moj-racun.si View the project
Moj Račun invoicing app — invoice list with FURS fiscal verification
Satori Floating Center website
Astro Website

Satori Floating Center

Custom Astro website for a flotation & wellness center, with a booking-focused UX and fast static delivery.

 Marco's Dive Optics Lab Shopify store
Shopify

Marco's Dive Optics

Shopify store for made-to-order prescription dive masks, with worldwide shipping.

 Vintage by Mimi Shopify store
Shopify

Vintage by Mimi

Shopify store for curated vintage & mid-century lighting and furniture, restored in Slovenia.

 MilkiMami Shopify store
Shopify

MilkiMami

Shopify store for a lactation-cookie brand supporting breastfeeding mothers.

 Svet lilij Shopify store
Shopify

Svet lilij

Shopify store for a lily-bulb grower, with curated bulb packages and EU shipping.

 Papirnica MAAR Shopify store
Shopify

Papirnica MAAR

Shopify store for a stationery & office-supplies retailer with an online and in-store setup.

 Snow Monkey Shopify store
Shopify

Snow Monkey

Custom Shopify store with tailored theme, product configuration, and multi-market support.

 Plant Immortelle e-commerce platform
Shopify

Plant Immortelle

E-commerce platform for a natural skincare brand with subscription features and EU shipping logic.

 Mikrozelenje Šebenik Shopify store
Shopify

Mikrozelenje

Shopify e-commerce setup with custom sections for a microgreens brand.

 Expeditus Systems B2B store
Shopify

Expeditus Systems

B2B Shopify build with custom pricing tiers, bulk ordering, and ERP integration.

 Bittergreen Shopify store
Shopify

Bittergreen

Shopify theme customization with conversion-focused UX improvements.

 Cokonap Shopify store
Shopify

Cokonap

Shopify storefront setup with custom features for an e-commerce brand.

 Furam zase Shopify store
Shopify

Furam zase

Shopify theme customization and performance optimization.

 Lost Trails Shopify store
Shopify

Lost Trails

Shopify storefront build and brand implementation for an outdoor brand.

 SkinFairytale Shopify store
Shopify

SkinFairytale

Custom Shopify development and optimization for a skincare brand.
Lunibu Shopify store
Shopify

Lunibu

Custom Shopify development for a Montessori toys brand.

Rootreat Shopify store
Shopify

Rootreat

Shopify theme improvements and UX optimization.

 Pinkpanda (Ličila.si) e-commerce
CTO / Software Developer

Pinkpanda

Led technical strategy and software development as CTO for a growing e-commerce company.

 Delatis Shopify store
Shopify

Delatis

Skincare e-commerce setup and Shopify optimization.

 SIEL application
Application Development

Siel

Custom application development and integration work.
WeTeh microservice platform
Microservice

WeTeh

Backend microservice architecture for data processing and automated business workflows.

Chillum custom web store
Custom Web Store

Chillum

Custom e-commerce platform built with CodeIgniter.

View All Projects

How I Work

A structured approach to every engagement.

Every project follows a clear process—designed to reduce risk, ensure alignment, and deliver systems that last.

Step 01

Discovery

Understand your business goals, technical landscape, current pain points, and growth plans before writing a single line of code.

Step 02

Architecture

Design the system architecture, data flows, integration strategy, and technical roadmap tailored to your specific requirements.

Step 03

Build

Execute with clean, tested code, regular progress updates, staged deployments, and thorough quality assurance at every step.

Step 04

Long-Term Support

Ongoing system optimization, monitoring, performance tuning, and strategic technical guidance as your business evolves.

Let's discuss your system architecture.

Whether you're scaling a Shopify store, building a SaaS platform, or need technical architecture guidance—I'm here to help you build it right.

Get in Touch
[email protected] +386 41 998 467

Slovenj Gradec, Slovenia · Serving businesses across the EU