You will get robust Spring Boot REST APIs and backend integrations
Project details
Need to build robust APIs or integrate external services into your backend? I develop clean, secure, and production-ready Spring Boot REST APIs and third-party integrations.
With 20 years of enterprise Java experience across fintech, retail, and media industries, I deliver:
• Restful API design and implementation
• Third-party API integrations (Payment gateways, CRM, shipping, social)
• Database connectivity (SQL/NoSQL) and caching
• Clean code architecture following enterprise standards
• Full test coverage (JUnit, Mockito)
Every engagement starts with a structured technical analysis of your use case and data flow, so you know the architecture before any code is written.
I have built core banking integration platforms on Kubernetes, AI-powered document processing systems, and production CI/CD pipelines for enterprise clients.
Let us build a scalable API for your business.
With 20 years of enterprise Java experience across fintech, retail, and media industries, I deliver:
• Restful API design and implementation
• Third-party API integrations (Payment gateways, CRM, shipping, social)
• Database connectivity (SQL/NoSQL) and caching
• Clean code architecture following enterprise standards
• Full test coverage (JUnit, Mockito)
Every engagement starts with a structured technical analysis of your use case and data flow, so you know the architecture before any code is written.
I have built core banking integration platforms on Kubernetes, AI-powered document processing systems, and production CI/CD pipelines for enterprise clients.
Let us build a scalable API for your business.
Programming Languages
JavaWhat's included
| Service Tiers |
Starter
$60
|
Standard
$140
|
Advanced
$270
|
|---|---|---|---|
| Delivery Time | 3 days | 6 days | 10 days |
Number of Revisions | 1 | 2 | 3 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$20 - $70
Additional Revision
+$20
Database integration
(+ 1 Day)
+$25
API Testing extra
(+ 2 Days)
+$40
Observability setup
(+ 3 Days)
+$60Frequently asked questions
About Attila
Senior Software Engineer | Java/Spring Boot, React Native & AI/LLM
Godollo, Hungary - 9:50 pm local time
Recent work includes leading development of a Kubernetes-based core banking integration platform, building AI-powered search and risk-assessment tools using transformer models, and delivering a React Native mobile ticketing app for a public transport tender.
Core strengths: crisis management, systems architecture and planning, project and team leadership, and adapting quickly to new technologies under tight deadlines. Comfortable across the full stack: Java, Python, TypeScript/React, mobile (React Native), CI/CD (GitLab, Jenkins), containerization (Docker, Kubernetes), and major databases and message queues.
I thrive in agile environments and enjoy solving complex technical problems, from legacy system modernization to cutting-edge AI integration.
Steps for completing your project
After purchasing the project, send requirements so Attila can start the project.
Delivery time starts when Attila receives requirements from you.
Attila works on your project following the steps below.
Revisions may occur after the delivery date.
Technical analysis
Review your use case, data flow, and requirements before any code is written.
Development & testing
Build the API or integration with clean code, following enterprise standards, with full test coverage.