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$
USD
I will fix bugs and do quick tasks in your java spring backend
Guillermo F
About this gig
Hi! I'm a senior software engineer with 15+ years of experience, specialized in backend development with Java and the Spring ecosystem.
I can help you with quick, well-scoped backend tasks such as: fixing bugs in your Java / Spring Boot application; building or fixing REST APIs and integrations; writing and optimizing SQL / PostgreSQL queries; and small features, refactors or code reviews.
I write clean, maintainable code and use modern AI-assisted development to deliver fast and reliably.
Please message me with your task before ordering, so I can confirm the scope and delivery time. Let's get your backend working. Thanks!
Get to know Guillermo F
Guillermo F
Senior Software Engineer
- FromSpain
- Member sinceMay 2025
Languages
Spanish, English
I am a software engineer with over 15 years of experience, focused on backend development with Java and the Spring ecosystem. I specialize in API design, systems integration, and mission-critical applications across FinTech and public sectors. I leverage AI tools as a productivity multiplier to deliver full-stack solutions and high-quality code.
Other Software Development Services I Offer
FAQ
What kind of task fits in the Quick Fix package?
One small bug or change: an error in an endpoint, a failing query, a configuration problem or a small validation. If the task is bigger, I will tell you before we start.
How do you get access to my code?
You can share a Git repository (GitHub, GitLab or Bitbucket) or send the project as a zip. I return the changes as a commit, pull request or zip, with a short explanation.
Can we communicate in Spanish?
Yes, Spanish is my native language. In English I prefer written communication through the Fiverr chat.
