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$
USD
I will build your enterprise backend using java
Justice O
About this gig
Are you looking for a reliable Java backend developer to build or improve your application?
I am a professional Java backend developer specializing in Spring Boot and Quarkus. I can help you build scalable, secure, and high-performance backend systems and REST APIs for your web or mobile application.
My services include:
REST API development
Backend development using Spring Boot or Quarkus
Microservices architecture
Database integration (MySQL, PostgreSQL)
Bug fixing and debugging
API documentation (Swagger / OpenAPI)
Authentication and security (JWT)
Performance optimization
Why choose me?
Clean and maintainable code
Scalable backend architecture
Fast and reliable communication
On-time delivery
Whether you need a simple REST API, backend integration, or a full microservice architecture, I am here to help.
Please contact me before placing an order so we can discuss your project requirements.
Get to know Justice O
Justice O
Backend Developer
- FromGhana
- Member sinceMar 2026
Languages
English
I am a passionate software engineer with quality assurance skills, ensuring top-notch digital product quality through manual and automated testing. I am also a cloud engineer in deployments, automation, and optimization with AWS.
FAQ
What services do you offer?
I provide Java backend development services including REST API development, microservices architecture, database integration, bug fixing, and backend optimization using Spring Boot or Quarkus.
Which technologies do you use?
I work primarily with Java, Spring Boot, Quarkus, REST APIs, MySQL, PostgreSQL, and API documentation tools like Swagger/OpenAPI.
Can you build REST APIs for web or mobile applications?
Yes. I can develop secure and scalable REST APIs that can be used by web applications, mobile apps, or other backend systems.
Do you work on existing projects?
Yes. I can review, debug, improve, or add new features to your existing Java backend project.
Do you provide database integration?
Yes. I can integrate relational databases such as MySQL or PostgreSQL and implement CRUD operations and optimized queries.
Do you implement authentication and security?
Yes. I can implement authentication and security features such as Keycloak, JWT authentication and secure API endpoints.
Do you provide API documentation?
Yes. I provide clear API documentation using tools like Swagger/OpenAPI so developers can easily integrate with your backend.
What do you need from me before starting the project?
I will need your project requirements, API specifications (if available), database details, and any reference documentation.
How long does it take to complete a project?
The delivery time depends on the complexity of the backend system, number of endpoints, and additional features required.
Should I contact you before placing an order?
Yes. Please contact me before placing an order so we can discuss your project requirements and choose the best package.
