Modsen Global

Europe

Get consulted
Book a call
E-COMMERCE SOFTWARE DEVELOPMENT FOR EUROPEAN BUSINESSES

E-COMMERCE SOFTWARE DEVELOPMENT FOR EUROPEAN BUSINESSES

European e-commerce software development is the process of building and modernising online commerce platforms for country-specific tax, payment, privacy, accessibility, and localisation requirements. Modsen builds multilingual, VAT-ready, accessibility-ready commerce platforms and SaaS products with privacy-by-design and AI- and agent-ready architectures for retailers, brands, marketplaces, and B2B sellers.

Get consultation
Background-map

Why European e-commerce organizations choose Modsen

500+

tech specialists

7+

years in e-commerce development

30+

e-commerce projects

SaaS

products built & supported

Regular

E-commerce Berlin Expo participant

AI-

augmented delivery model

What we can help you implement

Modsen works with European e-commerce companies as an engineering partner – from adding specialists to an existing team to building and advising on the platform itself.

Scale your in-house team

Add e-commerce engineers with 7+ years of experience, without months of hiring.

Grow your e-commerce platform

Multi-tenant architecture, billing and infrastructure that keep up with your user base.

E-commerce consulting & product strategy

From payment infrastructure to compliance-heavy platforms.

Bring AI agents into your delivery

Engineers who set up agents for e-commerce testing, code review and release workflows.

European e-commerce software success stories: case studies

Not every project can be named or shown publicly. Some partners prefer confidentiality, while others are happy for us to share their stories. Explore the cases we can share here, and let's discuss additional projects on a call.

Value

9 weeks to first customer pilot

3 workflows validated

80% of the MVP codebase carried into the full product

Market-ready demand-forecast SaaS MVP for retailMarket-ready demand-forecast SaaS MVP for retail

Market-ready demand-forecast SaaS MVP for retail

Custom software development

Challenge

A European retail tech startup needed to validate a demand-forecast SaaS product. Serving multiple retailers from one platform meant isolating each customer's data: a GDPR requirement for any multi-tenant product.

Solution

Modsen built a focused MVP on a multi-tenant architecture with isolated retailer data, POS integrations, and an AI-augmented delivery model to keep scope tight.

Value

9 weeks to first customer pilot

3 workflows validated

80% of the MVP codebase carried into the full product

See similar project

Value

5 engineers at peak

2-week request-to-start

100% retention, features shipped through peak season

Extra React and Node.js engineers for a retail development projectExtra React and Node.js engineers for a retail development project

Extra React and Node.js engineers for a retail development project

Staff augmentation

Challenge

A high-traffic EU retailer had no spare in-house capacity for new features. New features had to ship on a live storefront during peak season, with zero room for checkout downtime.

Solution

Modsen added senior React/Node engineers into existing sprints, candidates vetted through the client's process and Modsen CTO sign-off.

Value

5 engineers at peak

2-week request-to-start

100% retention, features shipped through peak season

See similar project
Gradient background
Hexagons background
Senior Business Relationship & Partnership Manager, Europe

Discuss your European e-commerce project

Every market brings its own tax rules, payment habits, and compliance deadlines. Tell us which project you're launching or scaling into, and we'll map out what your storefront, checkout, and back office need to support them.

Natallia DrachicovaSenior Business Relationship & Partnership Manager, Europe

E-commerce development solutions built around European businesses

  • Custom platform development

  • Headless & composable commerce

  • B2B e-commerce development

  • E-commerce mobile app development

  • Legacy migration & re-platforming

  • ERP, CRM & POS integrations

  • E-commerce QA & performance testing

  • IT infrastructure for e-commerce

European e-commerce compliance software: built for accessibility and product data

Europe doesn't have one e-commerce rulebook. It has several, landing at different times, for different reasons.

Omnibus Directive

Discounts must show the relevant prior price used to calculate the reduction

May 28, 2022

Digital Services Act

Applies to online intermediaries – relevance for a standalone store depends on your business model

Feb 17, 2024

GPSR

Responsible economic operator in the EU and safety data on the product page

Dec 13, 2024

European Accessibility Act

E-commerce services fall under accessibility requirements

Jun 28, 2025

EU AI Act

Transparency rules for chatbots: disclosure that the customer is talking to an AI

Aug 2, 2026

All of these Modsen solves together at the architecture stage, reflected in how the data model is structured, how the UX is designed, and how every integration is built from the ground up.

GDPR, ePrivacy, consent, and privacy⁠-⁠safe cloud data flows

GDPR-compliant e-commerce development means consent data flows into every tag and SDK and cookie banner.

DSAR processes for access, export, and deletion

Retention policies, event pseudonymisation, a transfer matrix (SCCs, EU-US Data Privacy Framework)

EU-region hosting available as an option

Top custom software development partner

Oracle
Microsoft
AWS Partner
Google Cloud
OpenAI
Azure Developer Associate
Atlassian
ISTQB
Coursera Microservices
SAFe certified

European VAT, e-invoicing, and payment orchestration

European commerce requires more than a standard checkout. Tax rules, invoicing mandates, payment authentication, and local payment habits vary across markets. We connect them into one flexible operations layer, with e-commerce VAT OSS integration, e-commerce e-invoicing integration, and local payment methods e-commerce for Europe built into the architecture.

Destination VAT & OSS/IOSS

  • Country-based VAT rules, tax-inclusive pricing, refunds, and reporting
  • E-commerce VAT OSS integration for destination-based VAT flows
  • IOSS e-commerce integration for eligible imported goods

Country e-invoicing adapters and ViDA-
ready reporting

  • KSeF, SdI, XRechnung, Peppol, and other country-specific formats
  • E-commerce & e-invoicing integration for Europe without rebuilding the core platform
  • Automated invoice statuses, credit notes, ERP reconciliation, and reporting

PSD2/SCA/3DS2

  • Frictionless and challenge flows, exemptions, and soft-decline recovery
  • PSD2 compliant e-commerce development across multi-PSP architectures
  • SCA 3DS2 e-commerce integration with monitoring of authorisation performance

Local payment methods

  • iDEAL, BLIK, Bancontact, Cartes Bancaires, TWINT, SEPA, and more
  • Local payment methods for e-commerce in Europe through one payment layer
  • Country × payment-method logic that adapts as methods evolve

Zero-downtime replatforming and MACH modernisation

Moving platforms in Europe means moving several storefronts at once: different languages, currencies, VAT regimes, and consent settings, all live at the same time. Modsen replatforms without stopping sales, keeps SEO and data intact through the move, and brings MACH commerce development to Europe so releases can go out country by country instead of all at once.

Composable commerce development for Europe

MACH combines API-first services and composable components, often including SaaS platforms. This lets businesses scale or replace individual parts without rebuilding the entire store.

Independent releases per country

API-first integrations with local payment and tax/invoicing services

One shared core behind a separate storefront per market

SaaS subscription setup and vendor integration handled alongside the build

Intershop, OXID, and legacy platform migration services

Ageing platforms (Intershop, OXID, Magento 1, custom PHP or Java builds) don't scale well across multiple country storefronts.

Migration to Shopware, commercetools, Spryker, or Shopify Plus, country by country

Old and new storefronts run in parallel

Gradual releases with a rollback plan

Cutover scheduled outside peak season

Data, SEO, consent, and redirect migration

A platform migration risks losing more than code: catalogue content, order history, consent records, rankings, and price history can all disappear if the move isn't handled carefully.

Localised content and customer history carried over

GDPR consent records kept as proof

301 redirect map per language version, hreflang, structured data

Price history intact for the Omnibus 30-day rule

Rankings monitored for 4–8 weeks post-launch

AI-powered and agentic e-commerce for European markets

AI can lift conversion, average order value, and multilingual support but AI e-commerce development for Europe works differently from, e.g., a US build. The EU AI Act introduces transparency requirements for certain AI systems, while GDPR continues to shape how personal data is collected, used, and shared. Modsen builds AI e-commerce solutions with defined data boundaries, human escalation, and compliance requirements considered from the architecture stage.

  • Transparent AI assistants and human escalation

    Modsen builds multilingual AI assistants for order status, returns under the 14-day withdrawal period, and voice-led shopping, grounded in your product catalogue. Assistants disclose the AI use, log conversations, escalate to a human on request or low confidence, and carry guardrails on claims about price, stock, and safety data.

  • Privacy-aware recommendations and search

    AI recommendations in GDPR-regulated e-commerce run on consent-based data, not open profiling: limited segmentation, a documented legal basis per model, and personalisation the customer can switch off. Modsen works with tools like Algolia, Bloomreach, and Nosto, or custom models where data volume justifies it.

  • AI-powered visual search, built on consented image data

    Customers upload a photo and get matching products through computer vision matched against your catalogue, built for fashion, home decor, electronics, and marketplace categories. Because the image can count as personal data, Modsen processes it under a defined retention policy rather than storing it by default.

  • Fraud detection with a human right of review

    Modsen builds real-time fraud scoring, behavioural anomaly detection, and device fingerprinting, with models retraining as patterns shift. Automated fraud decisions fall under GDPR's Article 22, so every flagged order carries a built-in path to human review, lowering chargebacks without inflating false positives.

  • Agentic commerce and agent-ready product APIs

    Agentic commerce means purchases, or B2B procurement, that an AI agent completes on your behalf. Modsen prepares stores with structured product data (Schema.org Product/Offer), an API-first catalogue and checkout, limited agent permissions, and a handoff to SCA/3DS2 at payment. Emerging protocols like ACP and AP2 are treated as still developing.

Technologies & platforms we work with

Our e-commerce work for Europe draws on the cloud providers, languages, and platforms your operating model needs from country-specific tax and payment integrations to the ERP and PIM systems already running your business.

E-commerce platforms

  • Shopware
  • Commercetools
  • Spryker
  • Shopify Plus
  • Adobe Commerce
  • Sylius
  • PrestaShop
  • SAP Commerce

Java

  • Java 8/11/17/21
  • J2EE
  • Spring Framework
  • Kotlin
  • Ktor 3
  • Quarkus 3
  • Vert.x 4

JS

  • React
  • Angular
  • Vue.js
  • Next.js
  • Node.js
  • NestJS
  • Express
  • React Native

QA/AQA

  • BDD
  • CI/CD
  • Selenium
  • Selenide
  • Playwright
  • Selendroid
  • Appium

AI/ML

  • Python
  • TensorFlow
  • Keras
  • PyTorch
  • MatLab
  • Google Cloud Platform

.NET

  • C#
  • Visual Basic
  • F#
  • Linq
  • .NET Core
  • Entity Framework
  • Hibernate
  • ASP .NET MVC Core
  • WPF
  • MAUI

Mobile

  • Objective-C
  • Swift
  • SwiftUI
  • Java
  • Kotlin
  • Jetpack Compose
  • Flutter
  • KMM

Business Analysis

  • Requirements elicitation
  • Requirements traceability
  • Change management
  • Diagramming
  • Stakeholder management
  • Prototyping
  • Benchmarking
  • Data analysis, SQL

System Analysis

  • Requirements management
  • Decomposition & Alignment
  • Impact analysis
  • Modeling
  • Technical documentation
  • Traceability
  • System & Integration analysis

DevOps

  • Cloud Platforms
  • CI/CD
  • Container Orchestration
  • Infrastructure as Code (IaC)
  • Configuration Management
  • Monitoring & Observability
  • Log Management

Why choose Modsen as an e-commerce development company in Europe?

As a European e-commerce development company, we start where regulation and software meet, keep platform, payments, tax, and ERP work inside one team, and roll out country by country on infrastructure built for it.

European regulatory requirements translated into software

EU e-commerce compliance software starts at discovery. We map GDPR, Consumer Rights, Omnibus, GPSR, EAA, VAT and e-invoicing requirements into the data model, UX, integrations and tests before development. Early regulatory mapping helps define scope and budget and reduces unexpected requirements.

Platform, payments, tax, and ERP expertise in one team

Country adapters for payments, VAT, e-invoicing, and ERP sit with the same team that builds the platform. Ecommerce e-invoicing integration across Europe stays inside that same team, so you are not coordinating a platform agency, an ERP integrator, and a tax vendor separately; defects at the seams get resolved inside the team.

Country rollouts with privacy-safe cloud operations

Modsen helps SaaS platforms adapt local settings, privacy requirements and infrastructure for each market, then roll out changes gradually and monitor performance after launch. With EU-region hosting, country-level monitoring, backups and disaster recovery, every new market follows a clear and repeatable rollout process.

AI-augmented delivery for faster European e-commerce releases

Our AI-augmented software delivery supports code generation, testing, documentation, and code review, helping shorten release cycles. AI-generated artefacts undergo human validation and security checks, while customer payment and personal data stay outside external LLM workflows through defined data boundaries.

Our e-commerce development process

We follow a structured lifecycle with AI-supported delivery integrated where it improves work without compromising architecture decisions. AI handles routine research, documentation, and test scaffolding under engineer supervision.

E-commerce software development process for the European market
E-commerce software development process for the European market
E-commerce software development process for the European market
E-commerce software development process for the European market

What our European clients say about working with Modsen

Clutch platform

“They delivered a scalable solution that reduced our HR workload by 50%.”

Head of IT

Manufacturing Company, Eastern Europe

Partnership

Custom software development

Source

Clutch · Verified

Verified
TopDevelopers

“We see Modsen as a trustworthy partner providing high-quality banking mobile app services.”

Natalia Osipchik, Founder

UMIND

Partnership

IT staff augmentation · Fintech

Source

TopDevelopers · Verified

Verified
TechBehemoths

“They moved at the pace our investors expected, not the pace an outsourced team usually has.”

Sophia, CPO

Partnership

IT staff augmentation · E-commerce

Source

TechBehemoths · Verified

Verified

More reviews on request

Leave your email and Modsen will send a list of other partners happy to talk about their experience.

Industries we serve across e-commerce

Industries served by e-commerce software development
Industries served by e-commerce software development
Industries served by e-commerce software development
Industries served by e-commerce software development

European e-commerce software development FAQ

What makes e-commerce software development in Europe different?

It means building country adapters into the platform itself: destination VAT, OSS/IOSS, and e-invoicing for tax; SCA and local methods for payments; GDPR and ePrivacy for consent; the EAA for accessibility; and GPSR and DPP for product data. Europe is not the same as the EU: the UK and Switzerland run their own rules alongside it. E-commerce development for European businesses is built with all of this in from the start, not added market by market.

How do you build GDPR and cookie consent into an e-commerce platform?

GDPR-compliant e-commerce development starts with consent as data and events, not a banner. Modsen builds consent-management propagation into every tag and SDK, DSAR processes for access, export, and deletion, retention policies, and a vendor and transfer matrix, with EU-region hosting available where required.

What does the European Accessibility Act require from e-commerce websites?

Since 28 June 2025, e-commerce services in the EU must meet accessibility requirements, with EN 301 549 and WCAG 2.1 AA as the practical benchmark. European Accessibility Act e-commerce compliance is verified through audits and testing rather than a single automated scan, and national implementation and micro-enterprise exceptions can vary; worth checking for your specific case.

How do OSS and IOSS work in e-commerce software?

OSS lets you declare VAT on cross-border B2C sales to all EU member states in one quarterly return; IOSS covers imports up to €150. E-commerce VAT OSS integration means destination VAT above the €10,000 threshold, evidence of the buyer's country, declaration exports, and correctly handled refunds and credit notes. IOSS e-commerce integration also needs to account for the temporary €3 per-item charge on parcels under €150 from outside the EU, in effect from 1 July 2026 to 1 July 2028.

Can you integrate European e-invoicing systems?

Yes. E-commerce e-invoicing integration across Europe can include country-specific systems and formats such as KSeF, SdI, XRechnung, ZUGFeRD, and Peppol-based workflows, with invoice statuses, error handling, ERP reconciliation, and a data model that can accommodate evolving requirements.

How do PSD2 SCA and 3DS2 affect checkout conversion?

PSD2-compliant e-commerce development builds frictionless and challenge 3DS2 flows with exemptions for low-value and trusted transactions, plus soft-decline recovery. SCA 3DS2 e-commerce integration is measured through authorisation rate by country, so the impact shows up directly in revenue, not just compliance.

Which local payment methods should a European checkout support?

It depends on the country and customer mix: iDEAL and Wero in the Netherlands, Bancontact in Belgium, BLIK in Poland, Cartes Bancaires in France, Klarna, PayPal, and Wero in Germany, TWINT in Switzerland, and SEPA transfers. Giropay is no longer part of that mix. Local payment methods for e-commerce in Europe work best behind one adaptable payment layer rather than a fixed list.

Which commerce platform fits a European rollout?

It depends on your operating model, ERP, number of countries and languages, and need for composability. Shopware suits DACH mid-market and enterprise; commercetools fits API-first enterprise builds; Spryker suits B2B and marketplace models; Shopify Plus works well for a fast DTC launch.

Can you replatform a store without losing SEO or customer data?

Yes, using a strangler or canary approach with a rollback plan: a 301 map for every language, hreflang, migrated consent records, continued price history, data validation, and four to eight weeks of post-launch monitoring. The approach is designed to preserve rankings, not guaranteed to have zero impact.

How do you prepare e-commerce for AI agents and GDPR-aware personalisation?

AI recommendations GDPR ecommerce use data processed on an appropriate legal basis, with personalisation controls customers can switch off. Agentic commerce development in Europe requires an agent-ready platform with machine-readable product data, API-accessible checkout, defined permissions, and user authorisation.
Background-message

Build your European e-commerce platform with Modsen