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I will fix or build your API integration and backend automation
Michael N
About this gig
Need an API integration that works reliably instead of breaking when your business depends on it?
My background includes regulated and enterprise environments, including work connected to international reference companies such as:
- Barclays
- AstraZeneca
- Morgan Stanley
- American Express
- Shell
- British Airways
- AT&T.
I am a senior full stack developer and software consultant with 14 years of experience in enterprise software, internal tools, regulated environments, ERP/MES integrations, CI/CD, and handover documentation.
I can build or fix API integration work across REST APIs, webhooks, backend automation, SQL-backed systems, authentication, payload mapping, data validation, and production support.
Good fits:
- REST API integration
- Webhook setup or debugging
- SQL/database-backed integrations
- C#, .NET, TypeScript, JavaScript, Python
- Authentication and token issues
- Backend automation between business systems
- Stabilizing fragile scripts or existing integrations
Before ordering, message me with the systems involved, API docs, current error, deadline, and access constraints. I will tell you plainly which package fits or whether a custom offer is smarter.
Get to know Michael N
Michael N
Senior Full Stack Developer Software Consultant
- FromDenmark
- Member sinceJun 2026
- Avg. response time1 hour
Languages
English, Danish
I am a Senior Full Stack Developer and Software Consultant with 14 years of experience in enterprise software delivery, internal platforms, and SQL-backed systems. I specialize in building REST APIs, CI/CD discipline, and production-ready documentation for regulated industries like finance and energy.
FAQ
Can you fix an existing API integration?
Yes. Send the API docs, current error, code or logs if available, and a short description of what should happen. I will confirm scope before you order.
Can you build a new API integration from scratch?
Yes. I can build a new REST API integration, webhook flow, backend automation, or SQL-backed sync. Send the systems involved, API docs, authentication method, and desired data flow first.
Can you debug webhooks or authentication issues?
Yes. I can help with failing webhooks, token/authentication issues, payload mapping, validation errors, retries, logs, and unstable business-system integrations.
What do you need before I order?
Please send the API docs, current error or goal, stack, relevant links, logs/screenshots, access constraints, deadline, and whether this is production-critical.
Do you offer custom orders for larger integrations?
Yes. If your integration has multiple systems, complex data rules, security constraints, or ongoing support needs, message me first and I will suggest the right package or custom offer.
