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E-commerce

An online store is more than just a product catalog with a shopping cart. We build e-commerce solutions that win over your customers and streamline your processes.

Abstrakter Farbverlauf in Grün und Blau
Produktkatalog mit Preisen und Status der Artikel
Zwei Kollegen von seitenweise besprechen ein Projekt am Laptop

E-commerce Agency

E-commerce isn't a side project. A successful online store requires a strategy, a well-thought-out design, solid technology, and ongoing optimization. We'll guide you every step of the way, from choosing a platform to day-to-day operations.

Strategy Before Technology

Stores that
convert

Technology that
grows with you

Mitarbeiter von seitenweise im Büro

Systems that work together

An online store rarely stands alone. Inventory management, payment processors, shipping providers, and CRM systems all need to work together. We integrate the systems you’re already using and create interfaces that automatically synchronize orders, inventory levels, and customer data. This helps you avoid manual duplication of work and reduces the risk of errors.

A shopping experience instead of a product list

A good online store guides visitors through the purchasing process without them having to think about it. We design product pages, category structures, and checkout processes so that visitors can find what they’re looking for and complete their purchase. From the home page to the order confirmation: every step is optimized for conversion.

Mitarbeiter von seitenweise im Gespräch mit einem Kollegen

A successful online store consists of many building blocks that must work together. Here you can see the areas we focus on and what sets a store that actually sells apart from one that’s just online.

Produktseite eines Onlineshops auf dem Smartphone

Store Setup and Design

Whether it's a complete rebuild or a redesign, we develop online store designs that convey your brand and highlight your products. Product pages, category overviews, filter functions, and landing pages are created as standalone layouts.

Mitarbeiter von seitenweise am Arbeitsplatz

Checkout Optimization

The checkout process determines whether a purchase is made. We reduce the number of steps, simplify forms, and ensure that visitors complete the purchase process instead of abandoning their shopping carts. Each step is analyzed for reasons of abandonment and optimized accordingly.

Auswahl der Zahlungsarten von PayPal bis SEPA

Payment and Shipping

We integrate the payment methods your customers expect: credit card, PayPal, Klarna, SEPA direct debit, and more. We set up shipping options, tracking, and automatic notifications so that the process runs smoothly for both buyers and you.

Produktkatalog eines Onlineshops mit Artikelstatus

Product Management

Your team needs to be able to manage products on their own: change prices, create variants, and update descriptions. We'll set up the backend so that product management is quick and intuitive, even without technical knowledge.

Code eines API-Aufrufs zur Übergabe von Kontaktdaten ans CRM

Interfaces and APIs

Merchandise management, CRM, payment providers, and shipping carriers: We develop interfaces that connect your systems and automatically synchronize data. No manual data entry, no potential for errors, and no wasted time.

Zwei Kollegen von seitenweise besprechen ein Projekt am Laptop

Analytics and Reporting

Revenue, conversion rate, average cart value, abandonment rates: We set up tracking that shows you what’s working in your store and where there’s room for improvement. Data-driven decisions instead of gut feelings.

These companies know how we work

WooCommerce is the world’s most widely used e-commerce solution and runs on WordPress. We use WooCommerce when you need a flexible online store that can be tightly integrated with your existing WordPress website. We implement custom product pages, complex shipping rules, and integrations with inventory management systems using our own extensions. For larger online stores, we optimize performance so that everything loads quickly, even with a large number of products and simultaneous visitors. WooCommerce gives you full control over design, features, and data—without platform fees and without being tied to a single provider. The plugin architecture allows us to implement your specific requirements directly. You have access to your product data at all times and can expand the store yourself as needed. This makes WooCommerce ideal for businesses that value long-term independence. As an e-commerce agency, we choose the system based on your product range, not out of habit.

What Our Customers Say

„Working with an agency requires good ideas, cutting-edge technology, and clear budgets with no surprises. But the personal chemistry has to be right, too. With seitenweise, everything was just right. It was really fun.“

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Mathias Schwaben

Intervideo

„What particularly impresses us about Seitenweise is not only its technical expertise, but also its proactive approach.“

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Dirk Bockelmann

DFT

„To me, having a strong partner is important. Someone who is “passionate” about their work, who offers well-reasoned professional objections but also accepts and continues to fully support my decisions as a client when I choose a different path. I’ve been working very successfully with seitenweise in this way for many years—both in day-to-day operations and on many large-scale projects.“

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Veal from Martina

Liebich & Partner

„The team at seitenweise consists of our graphic design and web development professionals. Whenever we need help, they’re always there for us—quickly and reliably. Thank you for the great collaboration!“

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Sandra Meder

Sage

Projects

Frequently
Asked
Questions

show

sell

Zwei Kollegen von seitenweise besprechen ein Projekt am Bildschirm

seitenweise is a digital agency based in Bielefeld, founded in 1999. E-commerce is one of our services because an online store needs more than just code: strategy, design, technology, and ongoing optimization must all work together. Over 500 projects have shown us what really matters. At our agency, development, design, and SEO all work together as part of the same team. This means streamlined processes and a store that’s set up right from the start.

Portrait von Marcel Pietsch vor einer Holzlamellenwand

Marcel and André are your points of contact at seitenweise. They'll be happy to answer any questions you have about e-commerce.

Portrait von André Schwarzer vor einer Holzlamellenwand

Are you planning to launch an online store or looking to improve your existing one? Tell us about your plans. The first step is a quick video call—no obligation and free of charge.

Let's go!