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I will fix bugs and optimize your golang backend
Yusuf Dariyemez
About this gig
Is your Go backend crashing, returning incorrect responses, running slowly, or failing under load?
I am a Senior Software Engineer with 6 years of experience building and operating production backend systems in Go.
I can help with:
Runtime errors, panics, and unexpected behavior
REST API and webhook issues
PostgreSQL and MongoDB query problems
Slow endpoints and performance bottlenecks
Concurrency, goroutine, race condition, and deadlock issues
Authentication and authorization bugs
Kafka, RabbitMQ, Redis, and background worker problems
Docker, configuration, and deployment-related errors
Refactoring, unit tests, and regression prevention
My process includes reproducing the issue, identifying the root cause, implementing a maintainable fix, and verifying the result with tests or clear validation steps.
Please message me before ordering. Share the error, logs, expected behavior, relevant code, and reproduction steps so I can confirm the scope and recommend the correct package. Complex or unclear issues may require a custom offer.
Get to know Yusuf Dariyemez
Yusuf Dariyemez
Senior Go Backend Developer APIs Microservices PostgreSQL
- FromTurkey
- Member sinceMar 2023
Languages
English, Turkish
Hi, I'm Yusuf, a Senior Software Engineer with 6 years of experience building scalable backend systems and enterprise applications. I specialize in Go, REST APIs, microservices, PostgreSQL, MongoDB, Kafka, Redis, Docker, and Kubernetes. I can build backend applications from scratch, integrate third-party APIs and payment systems, fix bugs, optimize performance, and improve existing Go projects. I deliver clean, maintainable, production-ready code with clear communication and reliable delivery.
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FAQ
Should I contact you before placing an order?
Yes. Please send the error details, logs, expected behavior, reproduction steps, and relevant technology stack. I will review the issue and confirm the correct package before you order.
What counts as one bug?
One bug is a single clearly defined and reproducible issue with one expected outcome. Multiple unrelated errors, modules, or root causes may require a larger package or custom offer.
Can you guarantee that every bug can be fixed?
I can only confirm this after reviewing the available information and codebase. Some issues may depend on unavailable third-party systems, incomplete access, legacy dependencies, or infrastructure outside the project.
Can you improve the performance of a slow API?
Yes. I can analyze application code, database queries, indexes, external API calls, concurrency, caching, and background processing to identify and resolve performance bottlenecks.
Can you fix PostgreSQL or MongoDB problems?
Yes. I can investigate slow queries, incorrect data access, transaction issues, indexes, locking problems, aggregation pipelines, and application-level database errors.
Do you fix concurrency and goroutine issues?
Yes. I can investigate race conditions, deadlocks, blocked goroutines, channel misuse, synchronization problems, and unsafe concurrent access in Go applications.
Will you add tests for the fix?
Tests are included in the Standard and Premium packages where practical. For Basic orders, automated tests can be purchased as an additional service.
Can you work with a private repository?
Yes. You may provide temporary and limited repository access after the order begins. Please do not share permanent passwords or unrelated credentials.
What if the issue is larger than expected?
I will explain what was discovered before doing out-of-scope work. We can adjust the scope through an additional service or a custom offer if you approve it.
Which Go frameworks do you support?
I work with Gin, Fiber, Echo, net/http, and custom Go architectures. I can also follow the framework and conventions already used in your project.
