In-House Development

Your processes, accurately reflected in the store.

Software development directly from the manufacturer: We implement your requirements with our own team—no external freelancers, no risky third-party modules. From small add-on features to complete industry solutions.

Request a Project View Packages
Your project
in development
XONIC Development Team
Requirements & Consultation
Completed
Transparent Quote
Approved
Development & Testing
In Progress
Integration & Go-Live
planned
In line with the XONIC Core—your store remains updatable

Direct from the manufacturer

Over 20 years of e-commerce development.

In addition to your XONIC package, we can expand the functionality of your shop system upon request and technically map out your individual business processes with precision. We know the XONIC system down to the smallest detail—and develop extensions that fit your processes.

Every custom-programmed extension is developed in harmony with the XONIC Core. This ensures your store remains updateable—without locking you into an expensive custom version.
  • In-house development, integration, and testing
  • No outsourcing to freelancers or third-party providers
  • Transparent quote before project start

Services

From backend logic to frontend design.

PHP & MySQL Development
Custom features, cleanly implemented: development, integration, and extensive testing carried out directly by the XONIC development team—ensuring stability and performance even under heavy load.
Frontend: JavaScript, CSS, Bootstrap 5
Interactive elements, custom layouts, and consistently responsive design—for a fast, accessible shopping experience on any device.
Module Development & Integration
We integrate existing modules or develop custom extensions—for greater functionality and less manual work in day-to-day operations.
Custom Software & Multishop
Custom portal systems, industry-specific online stores, or multishop structures—tailored precisely to your business processes and target audiences.

Interface Development

We connect your online store to your infrastructure.

DATEV
Selectline
xentral
JTL
Amazon
eBay
OTTO
Kaufland
Galaxus
Stripe
Unzer
Mollie
PayPal
More …

Inventory management, accounting, marketplaces, payments—and much more.

“

At XONIC, the programmers do the development themselves—no outsourcing, no detours.

Frequently Asked Questions

About custom programming.

How much does custom development cost?
Custom development is project-based and available upon request. We’ll review your requirements, estimate the effort involved, and provide you with a transparent quote—so you’ll know exactly what to expect before we begin.
Will my store still be updatable after custom development?
Yes. Every extension is built in accordance with the XONIC Core. This ensures that future system updates are possible without losing your custom features.
Do you develop in-house or through external service providers?
We develop in-house with our own team—we do not outsource to freelancers or third-party providers. The team knows the XONIC system inside and out and is responsible for development, integration, and testing.
Which interfaces can be integrated?
We connect your store to inventory management systems (e.g., Selectline, xentral, JTL), accounting software (DATEV), marketplaces (Amazon, eBay, OTTO, Kaufland, Galaxus), and payment providers (Stripe, Unzer, Mollie, PayPal)—other systems available upon request.
Project-based pricing upon request

Transparent quote provided before the start.

Tell us your requirements—we’ll assess the feasibility, estimate the effort involved, and provide a clear quote. Development begins only after you approve it.

Request a project View packages
Includes
  • In-house development—no outsourcing
  • Upgradable in line with the XONIC Core
  • Integration & comprehensive testing
  • Transparent cost estimate provided upfront