You will get I will fix your Java / Spring Boot bug or error
Project details
If your Java or Spring Boot application is throwing errors, failing to start, returning wrong API responses, or behaving unpredictably, I can help. I specialize in diagnosing and fixing backend issues quickly and cleanly. You will get a reliable fix, a clear explanation of what went wrong, and stable code you can confidently run again.
I work with production systems daily and understand how stressful a blocking bug can be. My process is structured, transparent, and focused on delivering the correct solution without wasting your time. Whether it’s a failing endpoint, a dependency issue, a database error, or a configuration problem, I will identify the root cause and deliver a clean, maintainable fix.
This project is designed for one clearly defined backend issue. If your problem turns out to be more complex or spans multiple services, I’ll let you know before starting and offer a suitable solution. My goal is to give you a fast, reliable, and professional experience from beginning to end.
I work with production systems daily and understand how stressful a blocking bug can be. My process is structured, transparent, and focused on delivering the correct solution without wasting your time. Whether it’s a failing endpoint, a dependency issue, a database error, or a configuration problem, I will identify the root cause and deliver a clean, maintainable fix.
This project is designed for one clearly defined backend issue. If your problem turns out to be more complex or spans multiple services, I’ll let you know before starting and offer a suitable solution. My goal is to give you a fast, reliable, and professional experience from beginning to end.
Programming Languages
JavaWhat's included
| Service Tiers |
Starter
$35
|
Standard
$70
|
Advanced
$120
|
|---|---|---|---|
| Delivery Time | 2 days | 3 days | 4 days |
Number of Revisions | 1 | 2 | 3 |
Bug Investigation | |||
Fix Documentation | - | ||
Detailed Code Comments | - | - |
Optional add-ons
You can add these on the next page.
Follow-up support for 3 days after delivery (+$15)
+$15Frequently asked questions
About Ognjen
Java | Spring Boot Backend Engineer (APIs, Bug Fixes, Integrations)
Belgrade, Serbia - 12:32 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 bug details and project setup
I review your description, project structure, and reproduction steps. If the issue is larger than a single bug or out of scope for this project, I’ll let you know and propose a separate quote.
Reproduce the issue
I run the project locally and follow your steps to reliably reproduce the bug, confirming exactly when and where it occurs.