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Fiverr Pro
English
$
USD
I will debug and fix complex production bugs and critical backend issues
Khalid Osman
About this gig
BASIC Complex Bug Fix
I will investigate one complex backend or production bug, identify the likely root cause, apply a focused fix where safely possible, and verify the result. Best for isolated but difficult issues affecting application logic, backend services, APIs, databases, or production behaviour.
STANDARD Production Incident Repair
I will investigate a serious production failure, trace the root cause across the relevant backend components, apply the required repair, test the affected flow, and add regression protection where practical. Best for recurring failures, broken production workflows, backend incidents, deployment-related issues, and multi-step faults.
PREMIUM Critical System Rescue
I will perform a deeper investigation of a critical, recurring, or difficult production system failure, analyse the wider codebase and dependencies involved, repair the root cause, verify the system after the fix, and add regression protection to reduce the chance of the same defect returning. Best for severe incidents, complex backend failures, repeated crashes, difficult-to-reproduce bugs, and problems that previous fixes did not fully solve.
Get to know Khalid Osman
Khalid Osman
Automation API and Backend Developer
- FromUnited Kingdom
- Member sinceAug 2026
- Avg. response time1 hour
Languages
English
I build and troubleshoot complex automation, API and backend systems using n8n, Node.js, JavaScript, PostgreSQL, Supabase and AI/LLM APIs. I specialize in API integrations, webhook debugging, workflow recovery, backend troubleshooting, data pipelines and multi-system automation. My focus is reliable implementation, proper testing and verified results. I can help fix broken automations, backend issues, database integrations, AI systems and complex workflows involving multiple services.
My Portfolio
FAQ
What information do you need before starting?
I need a clear description of the problem, expected and actual behaviour, error messages or logs, your technology stack, and relevant code or repository access. Reproduction steps are very helpful when available.
Can you fix bugs that other developers could not solve?
Yes. This service specifically focuses on difficult, recurring, and complex bugs. I investigate the underlying cause rather than repeatedly patching symptoms. I will review the issue and scope before confirming the work.
Can you work on a live production system?
Yes, when it can be done safely. For production changes, I prefer appropriate backups, rollback options, controlled access, and testing or staging where available.
What types of production problems can you investigate?
Backend crashes, recurring errors, broken application logic, database-related failures, API issues, failed workflows, deployment problems, performance failures, intermittent bugs, and other difficult production incidents.
How do you make sure the same bug does not return?
Where practical, I reproduce the failure, identify and repair the root cause, verify the affected functionality, and add a regression test or deterministic validation designed to catch the same defect if it is introduced again.
