You will get I will build or update your REST API endpoint (Java / Spring Boot)
Project details
You will get a clean, reliable REST API endpoint built or updated in your Java / Spring Boot application. Whether you need a new route, improved logic, request/response mapping, validation, or database interaction, I deliver production-quality backend work with clear structure and maintainable code.
I work professionally with Spring Boot, microservices, and high-volume backend systems, so every endpoint I build follows industry best practices and consistent architecture. You will receive well-organized code, proper error handling, and a clear explanation of how to use the endpoint. My focus is on correctness, stability, and communication — making sure you get exactly the behavior your application needs.
I work professionally with Spring Boot, microservices, and high-volume backend systems, so every endpoint I build follows industry best practices and consistent architecture. You will receive well-organized code, proper error handling, and a clear explanation of how to use the endpoint. My focus is on correctness, stability, and communication — making sure you get exactly the behavior your application needs.
Programming Languages
JavaCoding Expertise
Performance Optimization, Security, DesignWhat's included
| Service Tiers |
Starter
$40
|
Standard
$80
|
Advanced
$150
|
|---|---|---|---|
| Delivery Time | 2 days | 3 days | 4 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 1 | 1 | 1 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Post-delivery support
(+ 3 Days)
+$20Frequently asked questions
About Ognjen
Java | Spring Boot Backend Engineer (APIs, Bug Fixes, Integrations)
Belgrade, Serbia - 2:21 am local time
Alongside this, I work professionally on large-scale, event-driven systems using Java, Spring Boot, and Apache Beam on Google Cloud Platform (Dataflow, Pub/Sub, Spanner, BigQuery). This means I bring production-grade engineering standards even to small or short-term tasks.
What I can help you with
- Debugging and fixing issues in Java / Spring Boot applications
- Implementing or updating REST API endpoints
- Integrating external services, APIs, and data sources
- Designing and optimizing SQL queries
- Refactoring and improving backend code quality
- Building or maintaining data-processing pipelines (Apache Beam)
- Assisting with deployments or basic server setup
Technologies I work with
- Java, Spring Boot, Spring Framework
- REST APIs, Microservices
- SQL (MySQL, PostgreSQL)
- Event-driven systems, high-volume processing
- Apache Beam (Dataflow)
- Google Cloud Platform
- Git, CI/CD pipelines
How I work
- I ask clear questions to understand your requirements
- I focus on correctness, stability, and maintainable solutions
- I communicate consistently and keep clients informed
If you need help fixing backend issues, extending a Java/Spring service, or improving reliability and performance, feel free to reach out with a short description of your project.
Steps for completing your project
After purchasing the project, send requirements so Ognjen can start the project.
Delivery time starts when Ognjen receives requirements from you.
Ognjen works on your project following the steps below.
Revisions may occur after the delivery date.
Review requirements and project setup
I review your endpoint description, project structure, and data flow to confirm the scope and clarify any open questions.
Design endpoint contract
I define the request and response model (URL, method, payload, status codes) so the behavior is clear and consistent.