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I will debug and fix backend API, java, spring boot, nodejs issues
Arun K
About this gig
I will debug and fix software issues in Java, Spring Boot, Node.js, Express.js, APIs, databases, and web applications. I can investigate bugs, identify root causes, implement fixes, and test the solution to ensure the issue is properly resolved.
I can help with backend errors, REST API issues, database problems, integration issues, performance-related bugs, frontend-backend integration problems, and testing-related issues.
Whether you have a single bug or multiple related issues, I will review the relevant code, investigate the problem, explain the cause, and provide a practical fix with clear documentation.
Technologies include Java, Spring, Spring Boot, Node.js, Express.js, JavaScript, Angular, React, SQL databases, REST APIs.
Please share the error details, relevant code, expected behavior, and current behavior so I can assess the issue accurately before starting.
Get to know Arun K
Arun K
Senior Software Engineer
- FromIndia
- Member sinceSep 2026
- Avg. response time1 hour
Languages
Hindi, English
I am a Senior Software Engineer and Technical Consultant with over 15 years of experience in Java, Spring Boot, Node.js, and Full Stack development. I specialize in building enterprise applications, cloud migrations, and DevOps automation using AWS and Docker. Additionally, I have mentored over 20,000 professionals, bridging the gap between complex technical concepts and real-world production practices.
My Portfolio
FAQ
What technologies do you support?
I provide debugging and bug-fixing services for Java, Spring, Spring Boot, Node.js, Express.js, JavaScript, Angular, React, REST APIs, SQL databases, and web applications.
What information should I provide to start?
Please provide the relevant source code, error message or screenshot, steps to reproduce the issue, expected behavior, actual behavior, and any relevant logs or API/database details.
Can you debug an existing application?
Yes. I can investigate bugs in existing applications, identify the root cause, implement the required fix, and test the solution.
Can you fix API and database-related issues?
Yes. I can troubleshoot REST API errors, backend integration issues, SQL/database problems, request/response issues, and frontend-backend integration problems.
Do you fix performance-related issues?
Yes. I can investigate common application performance issues such as slow APIs, inefficient database queries, excessive processing, and application-level bottlenecks.
Can you handle multiple bugs?
Yes. Multiple related bugs can be handled through the Standard or Premium package. Please contact me first if the issues are complex or span multiple parts of the application.
Can you work on urgent bugs?
Possibly, depending on the complexity of the issue and my current workload. Please contact me with the bug details before placing an order so I can confirm the delivery timeline.
