Browse categories
Explore
Fiverr Pro
English
$
USD
I will develop java spring boot rest apis and backend services
Nicola G.
About this gig
Need a Java backend feature built, a REST API integrated, or a bug fixed in an existing Spring Boot application? I am a Senior Java Backend Engineer with approximately 19 years of professional software development experience. My background includes enterprise software, financial services, and data integration. I can build or integrate REST APIs, fix and debug existing Java and Spring Boot applications, connect backend features to SQL databases with JPA and Hibernate, refactor code for maintainability, add JUnit and Mockito unit tests, and document the agreed deliverables. Each package covers a defined scope. Larger projects, multiple integrations, or changed requirements may need a custom offer. Please describe your application, expected behavior, and deliverables before ordering so we can agree on scope and timeline. Never include passwords, secrets, or production credentials.
Get to know Nicola G.
Nicola G.
Senior Software and Data Engineer
- FromItaly
- Member sinceDec 2021
Languages
English, Italian
I'm a Senior Software & Data Engineer with approximately 19 years of professional experience in enterprise software development and data integration.
I specialize in Java, Spring Boot, REST APIs, PySpark, Apache Spark, Databricks, SQL and ETL pipelines.
I help clients build reliable backend services, develop and troubleshoot data transformations, and research technical solutions.
My experience includes financial services, enterprise applications and data platforms. I focus on clear requirements, maintainable solutions and practical results.
Message me to discuss your project.
FAQ
What information do you need before starting?
Please share the feature or issue, expected behavior, acceptance criteria, Java and Spring Boot versions, build tool, database type, and required deliverables. For integrations, include the API documentation. Do not send passwords, secrets, or production credentials.
Can you work on an existing Spring Boot project?
Yes. I can review and extend an existing Java/Spring Boot codebase. Please describe the relevant module, current behavior, and requested change so I can confirm the scope and any dependencies before work begins.
Do you provide the source code?
Yes. The source code and agreed code changes are included in every package. Tests and documentation are included when they are part of the package scope.
Do you integrate databases and third-party APIs?
Yes. I can work with SQL databases through JPA/Hibernate and integrate third-party REST APIs when the documentation and requirements are available. Complex or multiple integrations require a separate scope.
What is included in a revision?
A revision covers reasonable adjustments to the agreed deliverables within the selected package. New features, extra integrations, or changed requirements are not revisions and may require a separate offer.
How are larger or more complex projects priced?
I will review the requirements, existing codebase, dependencies, and expected deliverables before estimating. Larger or less-defined work can be scoped as a custom offer. If Fiverr offers hourly collaboration for my account, I can discuss work at my target rate of €25 per hour.
