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$
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I will fix bugs and maintain your existing web application
Victor Herrera
About this gig
Is your existing web application showing errors, behaving incorrectly, or becoming difficult to maintain?
I can investigate the problem, identify the root cause, and implement a clean and reliable fix.
I work with existing applications, including legacy and modern codebases, and can help with:
- Bug fixing and troubleshooting
- Frontend and backend issues
- Java and Spring Boot applications
- React, JavaScript, jQuery and Bootstrap
- REST API problems
- Hibernate/JPA issues
- PostgreSQL and database integration
- UI and responsive layout fixes
- Code cleanup and small improvements
- Existing application maintenance
You don't need to know exactly what is causing the problem. Describe what is happening and I can help investigate it.
For complex issues, multiple unrelated bugs, or ongoing maintenance, please message me before ordering so I can review the scope and recommend the best option.
Get to know Victor Herrera
Victor Herrera
Software Engineer
- FromPortugal
- Member sinceAug 2026
Languages
Spanish, English
Full-Stack & Mobile Developer with 10+ years of experience building, maintaining, and modernizing real-world software. I help businesses turn ideas into reliable apps and upgrade legacy systems through refactoring, migration, and modernization. Experience across web, mobile, backend, APIs, databases, and enterprise systems using Java, Spring Boot, React, React Native, PHP, .NET, PostgreSQL, JavaScript, etc. I focus on clean, maintainable solutions tailored to business needs.
My Portfolio
Other Software Development Services I Offer
FAQ
I don't know what is causing the problem. Can you still help?
Yes. You can simply describe what is happening, what you expected to happen, and provide any screenshots or error messages available. I can investigate the technical cause.
What technologies do you work with?
I work with Java, Spring Boot, Hibernate/JPA, React, JavaScript, jQuery, Bootstrap, REST APIs, PostgreSQL and other common web technologies.
Can you work on an application developed by another programmer?
Yes. This Gig is specifically intended for existing applications and codebases.
What if my problem is more complex than the package I selected?
If the issue requires significantly more work, I will explain the situation and we can define the appropriate scope before additional work is performed.
Can you add new features too?
Small improvements may fit this Gig. Larger features or substantial application changes should be discussed first so I can provide a custom offer.
Do you provide ongoing application maintenance?
Yes. If your application needs regular maintenance, bug fixing or improvements, message me with your requirements and we can define an appropriate scope.
