X++ Experts in Cologne

X++ is used to customize Dynamics 365 Finance and Operations and older Dynamics AX systems. Companies use it for business rules, forms, workflows, batch jobs, integrations, and data handling close to the ERP core. It is the language for changes that must stay aligned with Microsoft’s application model.

X++ is the language behind Dynamics AX and remains central in Dynamics 365 Finance and Operations. Many people still search for Dynamics AX when they mean the older code base, so a freelancer should understand both the legacy and current extension model. That matters when a project involves upgrades or long-lived customizations.

X++ is used inside the Dynamics application layer, while C# is usually used for supporting services, integrations, or add-ons around it. In practice, teams often need both, but X++ is the right fit when the change belongs in the ERP logic itself. A strong freelancer knows where each language belongs.

A strong X++ specialist usually knows the Dynamics 365 data model, OData and REST integrations, SQL concepts, and the extension framework. Knowledge of workflow, security, forms, and batch processing also helps. For upgrade work, experience with Dynamics AX history is especially valuable.

X++ projects often need more than basic syntax knowledge. Simple fixes can be handled by a specialist who knows the application well, but upgrades, integrations, and refactoring need someone who has shipped real Dynamics work before. The harder the process fit, the more important platform experience becomes.

X++ work can often be done remotely because the code and many build tasks live in the Microsoft environment. On-site time in Cologne can still help for workshops, process mapping, and work that depends on close contact with business users. Many projects use a mix of both.

A strong X++ professional leaves code that is clean, upgrade-safe, and easy to support. Look for clear explanations of extensions, event handlers, data entities, and any risks tied to legacy code. Good specialists also ask about business processes before they change the code.

Before you bring in a X++ freelancer, gather the affected forms, tables, classes, integrations, and a short description of the business process. If you know whether the system is Dynamics AX or Dynamics 365 Finance and Operations, share that early. The better the starting context, the faster a specialist can help.

The average hourly rate of freelancers in Cologne, Germany who have used X++ in their recent projects is 109 €, which corresponds to a daily rate of about 871 € based on an 8-hour working day.

Of the freelancers in Cologne, Germany who have used X++ in their recent projects, 100% hold at least a Bachelor's degree, 60% hold at least a Master's degree, and 20% hold a doctorate.

On average, freelancers in Cologne, Germany who have used X++ in their recent projects have 23 years of professional experience, with a single engagement typically lasting around 1.8 years.

The most common languages among freelancers in Cologne, Germany who have used X++ in their recent projects are German (100%), English (100%), and Turkish (50%).

The most common industries among freelancers in Cologne, Germany who have used X++ in their recent projects are Information Technology (100%), Banking and Finance (67%), and Automotive (50%).

The most common business areas among freelancers in Cologne, Germany who have used X++ in their recent projects are Project Management (100%), Business Intelligence (83%), and Information Technology (83%).