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I will fix website, wordpress, API and backend errors
Daan
About this gig
Is your website showing errors, your API failing, or your WordPress site suddenly broken?
Im a Full-Stack Software Engineer specializing in troubleshooting, bug fixing, WordPress, APIs, PHP, JavaScript, and backend systems. I diagnose the root cause and implement reliable fixes so your system works as expected.
I can help with:
- HTML, CSS & JavaScript bugs
- Website errors and broken features
- WordPress plugin/theme conflicts
- PHP and WordPress errors
- API authentication & integration issues
- Backend logic and database problems
- Forms, webhooks & third-party integrations
- WooCommerce issues
- Responsive and cross-browser problems
- Errors after updates or changes
My process:
- Identify and reproduce the issue
- Find the root cause
- Implement the fix
- Test and verify the solution
Packages cover issues that can reasonably be diagnosed and fixed within the selected scope. Complex development, migrations, redesigns, security incidents, or extensive refactoring may require a custom offer.
For multiple or complex issues, message me first with the problem details, screenshots/error messages, and relevant access details.
Message me today, Lets get our system working properly again
Respect third-party rights
Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.
Get to know Daan
Daan
Custom Website Development, API Integration, Bug Fixes and Automation
- FromNetherlands
- Member sinceSep 2026
- Avg. response time1 hour
Languages
Dutch, English, German
Hi, I’m a Full-Stack Software Engineer specializing in custom website, troubleshooting, development, API integrations, automation, and backend systems. I help businesses build and improve websites and web applications, fix bugs, connect APIs and third-party services, automate workflows, and develop reliable backend functionality. I work with WordPress, WooCommerce, PHP, JavaScript, and morden web technologies. Whether you need a website built from scratch, an existing system fixed, an API integrated, or a workflow automated, I’m here to help.
FAQ
What is considered a complex issue?
Complex issues may include major functionality changes, migrations, redesigns, extensive refactoring, security incidents, or problems requiring significant investigation or development. These projects may require a custom offer based on the actual requirements.
What types of bugs do you fix?
I fix website, WordPress, JavaScript, PHP, API, database, integration, and backend issues. This includes broken functionality, errors, plugin conflicts, authentication problems, and other technical issues.
Which technologies do you work with?
I work with WordPress, PHP, JavaScript, HTML, CSS, REST APIs, databases, webhooks, and various web/backend systems. If you're using a specific framework or technology, message me before ordering so I can confirm compatibility.
How long will it take to fix my issue?
It depends on the complexity of the problem. Simple issues can often be resolved quickly, while complex backend, API, or integration problems may require more investigation. I'll confirm the expected timeframe after reviewing the issue.
What do you need from me to get started?
Please provide a clear description of the problem, steps to reproduce it, relevant screenshots or error messages, and any necessary technical information. If access is required, use temporary or appropriately restricted access whenever possible.
Can you fix custom code and third-party plugins?
Yes. I can troubleshoot custom code as well as issues involving WordPress plugins, themes, APIs, and third-party integrations.
Do you fix websites that are down or not loading?
Yes, I can troubleshoot common causes of website downtime, loading errors, server-side issues, DNS-related problems, and application errors. Please message me first for urgent or production-critical issues.
What if my issue requires more work than the package includes?
No problem. If the issue is larger than the selected package, I'll explain what is required and can provide a custom offer based on the actual scope.
Do you provide ongoing maintenance?
Yes. While this gig is primarily for troubleshooting and bug fixes, I can discuss ongoing maintenance, monitoring, and technical support for projects that require continued assistance.
