Services

Backend & Interfaces

I develop and stabilize backends and interfaces that run reliably in day-to-day operations: clear data flows, structured error handling, predictable changes.

In short

  • Focus: stable backends & interfaces
  • Result: fewer outages, predictable changes
  • Delivery: implementation, documentation, handover

Senior-level support – depending on goals and scope.
Availability by arrangement.

More services
Symfony / PHP REST OpenAPI (if appropriate) MySQL / MSSQL Docker CI/CD Linux

Scope

Setting up backend systems and interfaces so business, operations and development can work with them. No guesswork, no fragile “it somehow runs”.


When you need this

  • Recurring errors because data formats are inconsistent.
  • Timeouts, duplicate requests or partial failures make processes unstable.
  • Response times fluctuate and the database is often at its limit.
  • Access and permissions are not clearly structured or hard to trace.
  • Handover and operations are difficult because documentation and processes are missing.

What I deliver

Clear interfaces

Understandable endpoints and data formats. Changes become predictable – without surprises for connected systems.

Documentation

Short, practical documentation with examples and error cases. If needed, provided as OpenAPI/Swagger.

Access & permissions

Roles and permissions tailored to the project. If tokens are required, they are implemented cleanly and transparently.

Stable processes

Proper error handling, sensible timeouts and protection against duplicate processing. Goal: reliable processes.

Handover & operations

Logs that help instead of confuse, plus a short guide for operations and handover (README/runbook). So your team can continue working with it.

Typical situations in projects

“Changes are risky because no one has the full picture”

I introduce structure: clear data formats, transparent rules, concise documentation. Then we improve step by step – without disruption.

“Duplicate requests lead to duplicate results”

We prevent duplicate processing and define unambiguous workflows. Result: fewer edge cases and less manual effort.

“Performance fluctuates and the database is constantly under heavy load”

I proceed systematically: measure, identify bottlenecks, optimize queries, apply sensible caching and define clear limits. Result: predictable response times.

Technology (typical)

Symfony PHP 8+ REST OpenAPI MySQL MSSQL Docker CI/CD Linux

What matters is not the list, but that the system runs reliably and remains maintainable for years.

FAQ

Do you also implement GraphQL?

Yes, if it makes sense for the business case. In many integrations, a clearly documented REST interface is the more maintainable foundation.

How do you work with existing systems?

Step by step. First create transparency (data flows, error patterns), then improve in a targeted way – without big-bang risk.

How do you ensure my team can take over?

Clean structure, traceable changes, concise documentation and a handover that works in everyday operations.

Next step

Send me a short description of your goal, involved systems and timeline. I will respond with a concrete assessment.


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