How Not to Fall into the Trap of “Customs” Nobody Wants to Maintain

Where does flexibility end and the problem begin?

E-commerce implementations – especially in the B2B model – almost always require some level of system adaptation to a company’s processes. But there is a thin line between useful flexibility and an expensive trap, where a company ends up with a non-standard solution that nobody wants to maintain or develop later.

Many business owners, when deciding on their own e-commerce modifications, act with the best intentions: they want to streamline processes, make life easier for customers, and adapt features to industry specifics. The problem starts when every exception becomes the rule and the store’s architecture no longer resembles any standard. And while at first glance everything works, beneath the surface lies a system that cannot be easily updated, extended, or handed over to another team.

Why can “custom” mean trouble?
Every non-standard element that is not based on official APIs, plugins, or documented platform capabilities creates dependency. Dependency on a specific developer, a specific agency, or an approach that was relevant at the time of implementation – but may not stand the test of time.

The result? System updates become costly or even impossible, integrations break when the ecosystem changes, and any attempt at further development ends with “don’t touch it, or it will fall apart.” The company becomes trapped in its own code, and instead of flexibility gains an expensive barrier to growth.

Technical debt grows faster than you think
Seemingly small modifications – an extra field in a form, a custom cart logic, a proprietary discount system – can turn into a critical issue after a few years. Why? Because most teams don’t document changes, don’t create regression tests, and the people who implemented the solution often change faster than the technologies they use.

If the system is not developed according to best practices – meaning in a scalable, testable, and transferable way – it becomes technical debt. And debt must be repaid: sometimes in the form of bugs, sometimes in delayed projects, and sometimes by having to rebuild everything from scratch.

How to design reasonable customization?
It’s not about completely avoiding modifications. Many companies have unique processes that cannot be reproduced “out of the box.” The key is to design extensions as you would design good software: modular, documented, and based on official system capabilities.

Platforms like Shopware offer extensive APIs, rule builders, flow builders, plugin systems, and separated frontend/backend layers that allow customization without interfering with the system’s core. This means new features can be implemented without the risk of everything “falling apart.”

When to say “no” to a client’s idea?
One of the hardest moments for an implementation company is when a client requests something “simple” – which in practice proves impossible to maintain. The role of a good implementation partner is not to fulfill every wish but to advise when today’s convenience means tomorrow’s cost.

At CREHLER, we have often had to rescue projects that were stuck in “customs without a plan.” That’s why today we follow a principle in our projects: everything we create must be easy to develop, test, and hand over. Even if it means giving up a supposed “improvement” in the short term.

CREHLER – a reasonable approach to customization
At CREHLER we are not afraid of modifications – but we always ask ourselves (and the client): who will maintain this in two years? Will it work after an update? Will the next team be able to understand it?

We implement B2B e-commerce based on Shopware, which offers huge customization possibilities – but not at the expense of scalability and stability. We use best development practices, test solutions before release, and ensure proper system architecture and documentation.

If you want your platform to be tailored to your business without locking you out of future growth – let’s talk. We’ll show you how to design solutions that last not only for today’s needs but also for tomorrow’s changes.