Java Backend API Feature Development

@ashokdzpxq

Hi, I would like to apply for this opportunity to contribute to your project. I am a Java Spring Boot developer with 18+ years of experience in designing, developing, and architecting scalable backend solutions for fintech, e-commerce, enterprise, and cloud-based applications. Along with strong backend expertise, I also work with AI-assisted development tools and modern AI workflows, including Claude Desktop, Codex, and RAG-based solutions. This helps me build smarter, more efficient applications and improve development productivity where AI integration is needed. My technical expertise includes: Spring Boot, Spring Security, Spring Batch, Spring Cloud, Spring MVC Microservices architecture and RESTful API development AI tools and workflows: Claude Desktop, Codex, RAG AWS cloud services including ECS Fargate, EC2, S3, ALB, and RDS SQL databases such as MySQL, PostgreSQL, Oracle, and MS SQL Server Docker, Jenkins, CI/CD, and containerized deployments Legacy system integration and modernization Elasticsearch, Redis, and caching solutions Testing and quality assurance using JUnit, Selenium, and JMeter

@b2btechnology20

As a Java backend API developer with over 11 years of experience, I am confident in my ability to meet and exceed your project requirements for your Spring Boot web application. I have extensive knowledge of Java as well as Spring Boot, REST, and MySQL, making me a perfect fit for this job. My background in clean Core-Java OOP principles aligns perfectly with your desire for well-organized, maintainable code that respects established paradigms. One of my crucial skills is performing end-to-end tests with Postman or cURL. I ensure that all the endpoints and JSON responses are functional and predictable under various scenarios. My proven ability to troubleshoot edge cases and handle errors gracefully will be an asset to your project. These aspects are vital to creating a reliable API that doesn't disappoint under high loads or when presented with unexpected data. In summary, employing me ensures you'll have a dedicated professional who understands the intricacies of your project. My clear and timely communication style guarantees you'll always be aware of work progress while my commitment to delivering cleanly written, test-driven code promises a product that's solid, secure, and maintainable. Thank you for considering my candidacy; I look forward to the possibility of working together.

@jayantkumar314

Hi, I can implement the new REST feature within your existing Spring Boot architecture with clean controller, service and repository layers. I’ll handle MySQL/JPA integration, validation, predictable JSON responses and proper HTTP error handling. I’ll add unit/integration tests and verify the complete API flow through Postman before delivery. I can work directly with your existing codebase and provide clean commits along with setup documentation.

@CANWS

Hi, I’ll build the API feature cleanly, securely, and in a way that fits your existing Java backend, not just make the endpoint work. With 12+ years of development experience and 250+ projects delivered, I’m comfortable working with Java, Spring Boot, REST APIs and MySQL, including existing codebases where changes need to be carefully integrated. I’ll focus on: • Clean, maintainable Spring Boot code • Secure and efficient REST API development • Proper validation and error handling • Database integration and performance • Unit/integration testing • Clear documentation and smooth integration with the existing system I’ll first understand the current architecture and requirements, then implement the feature without disrupting existing functionality. Thanks

@pashyaa

Hi, I’m a Senior Java Backend / Full-Stack Engineer with 14 years of experience in Java, Spring Boot, REST APIs, JPA/Hibernate, MySQL/PostgreSQL, testing, validation and exception handling. This requirement aligns well with my background. I can review the existing codebase, implement the new endpoints using clean controller/service/repository layers, add the required database mappings and tests, handle edge cases properly, and provide clear setup documentation. I’m available to start immediately and can provide regular progress updates throughout the work. Regards, Prasanna

@arslanshahid386

Hi, I can help you with this project. I have relevant experience with JavaScript, MySQL, API Development and can handle the work from development to testing and delivery. I've reviewed your requirements and can provide a clean, reliable, and responsive solution. Let's discuss the details and get started. Best, Arslan Shahid

@technologiesit

Having spent over 8 years developing applications ranging from web to mobile, I believe I possess the perfect skill set to excel in your project of backend API feature development. My sound command over Java and JavaScript and my proficiency in API Development will ensure that not only new endpoints are designed for your Spring Boot application but also they're integrated seamlessly through different controller, service, and repository layers. Moreover, my strong understanding of Core-Java OOP principles will facilitate meticulous logic building that fetches and delivers data in a clean and secure manner. All said, having successfully delivered 200+ projects previously speaks volumes about my commitment towards prompt delivery without compromising on quality. To me your satisfaction supersedes all else hence clear communication channels will always remain open giving you timely progress updates or clarifying queries swiftly as needed. So why wait? Let's discuss your noteworthy project today!

@ssquare489

For this Spring Boot REST feature, I’d keep the new functionality isolated behind clear controller, service, and repository boundaries, with DTO validation and consistent error contracts so it fits cleanly into the existing application instead of becoming a one-off API path. I’d implement the endpoints with Spring Boot and MySQL using JPA or MyBatis based on the current repository pattern, keeping transaction handling, validation, parameterized queries, and JSON responses predictable. My two priorities would be clean implementation and maintainability: centralized exception handling, meaningful HTTP status codes, focused unit/integration tests, and clear schema changes will make PR review faster and reduce regressions when the API grows. I’m comfortable taking backend work through implementation, debugging, Postman/cURL verification, automated tests, documentation, and PR-ready delivery. For minimal UI adjustments, I can also handle the required HTML/CSS/JavaScript without disrupting the backend scope. A relevant example is our Lead Distribution app, where we built a custom API-driven workflow for receiving, validating, managing, and distributing leads, replacing repetitive manual Postman/API operations with a maintainable application flow.

@LeadForce1

With over a decade of experience in full-stack web development, software engineering and artificial intelligence, I bring a unique blend of skills to tackle your Java backend API feature development project. My proficiency in Java, Spring Boot, MySQL, REST API and more make me the perfect fit for this task. Moreover, I have a strong commitment to clean coding practices and test-driven development which are crucial for your project. I can expertly design and implement the new endpoints using Spring Boot while ensuring that all logic aligns with proper OOP principles. Additionally, I am comfortable using either MyBatis or JPA for efficient mapping of tables and queries in the database. Testing is a crucial part of the development process, and I understand that from my extensive experience. I have significant expertise in writing comprehensive test suites (unit, integration, end-to-end) that ensure smooth functionality even during edge cases or error scenarios. Logging will be well-documented to ensure easy traceability and future enhancements. Overall, my profile is diverse yet integrated - born out of a strong foundation in mathematics research combined with an ever-evolving expertise in software development. It would be an honor to bring this unique blend of skills and experiences to craft exceptional solutions for your project. Let's transform your vision into reality!

@KarthikTechCon

Senior Java Backend Developer: With 15+ years of experience, I specialize in crafting robust backend solutions. I will extend your Spring Boot application by developing a new REST feature focused on clean, maintainable code and seamless database interactions. Execution Strategy: - Design and implement RESTful endpoints using Spring Boot, adhering to Core-Java OOP principles for maintainability. - Integrate MyBatis/JPA for efficient data retrieval and secure insertion, ensuring optimal performance. - Develop comprehensive unit and integration tests, utilizing Postman or cURL for end-to-end testing and dependency mocking. - Maintain a tidy codebase with thorough documentation, facilitating easy reviews and maintenance. Key Deliverables: - Git commit or pull request containing functional code and test suites. - Any schema changes with detailed README for setup instructions. - Clear and timely communication throughout the project for progress updates. Quality & Performance: - Ensure code quality through rigorous testing and adherence to best practices. - Handle edge cases and errors gracefully with appropriate HTTP status codes. Timeline & Next Steps: I can provide the deliverables within 3-4 weeks, depending on requirements. I'm available for quick updates and clarifications throughout the development process. Best Regards, Karthik B Resonite Tech

@tyronet2

You need a new Spring Boot feature that fits the existing architecture cleanly, returns predictable JSON, and remains easy to test and extend after the initial merge. I have 9 years of backend experience with Java, Spring Boot, REST APIs, MySQL, and layered application design. I’ll first review the current conventions, domain model, authentication, exception handling, and database access pattern. The feature will follow controller, service, and repository boundaries with validated request objects, clear response models, transactions where required, and centralised error handling using meaningful HTTP status codes. I can work with either JPA or MyBatis and will follow whichever pattern already exists rather than introducing unnecessary inconsistency. The pull request will include schema migrations, unit tests, repository and integration tests, Postman or cURL verification, API documentation, and setup notes.

@NehalSK

Hi I can build the new REST endpoints for your Spring Boot app. I will set up the controllers, service logic, and database mapping to ensure clean MySQL queries, then add unit tests and Postman coverage for solid error handling. I can jump on this right away. Send me a message with the details and I can get started. cheers Nehal

@Shonali1406

Hi there, I can help with your Java Backend API Feature Development. *What I will deliver:* - New Feature Development in Existing Java Backend - REST API Design & Implementation - Secure & Scalable - Database Integration & Optimization - MySQL / PostgreSQL / MongoDB - Authentication, Validation & Error Handling - Clean Code with Proper Documentation - Unit Testing & API Testing via Postman / Swagger - Deployment Support & Bug Fixes Stack: Java, Spring Boot, Spring Security, JPA / Hibernate, MySQL, Git, AWS Share your existing codebase / API docs and feature requirements, I will review and give you a fixed timeline and cost today. Ready to start with Milestone 1 now. Best regards,

@rimiloca

I can implement the new REST feature within your existing controller/service/repository structure, keeping the current persistence approach rather than switching JPA/MyBatis unnecessarily. I would agree the request/response contract first, add validation and transaction boundaries, then cover successful writes, invalid input, missing records and permission failures in tests. My rate is $15/hour; I can estimate the total once I see the endpoint list and schema. Delivery would be a focused PR with migration notes, tests and sample requests. Which Spring Boot version and authentication mechanism does the app use?

@umer419

Hello, I checked your project "Java Backend API Feature Development" and already have a clear understanding of your requirements and how to deliver them efficiently. I have solid experience in JavaScript, MySQL, and I've successfully completed similar projects by delivering high-quality, scalable, and reliable solutions. Why choose me? * Strong expertise in JavaScript, MySQL * Clean, optimized, and scalable implementation * Fast communication and regular progress updates * Focused on delivering results, not just completing the task I'm ready to start immediately and would be happy to discuss the details. Best regards, Umer

@softhunters

Hi, I’m Ashish Malik — Full Stack Developer & Digital Marketing Expert, with 9+ years of experience and 500+ projects delivered. I can extend your existing Spring Boot application with a clean, secure and maintainable REST API layer integrated with MySQL. My approach: ✅ Spring Boot REST endpoints for GET/POST operations ✅ Clean Controller → Service → Repository architecture ✅ Core Java OOP principles and maintainable code ✅ MyBatis/JPA integration with optimized queries ✅ Predictable JSON responses and proper HTTP status codes ✅ Input validation and graceful exception handling ✅ Unit and integration testing with mocked dependencies ✅ Postman/cURL end-to-end API validation ✅ Secure database operations and transaction handling ✅ Schema changes and migration support where required ✅ Minimal HTML/CSS/JS tweaks if needed ✅ Clean Git commits/PR with documentation and README I’ll first review the existing architecture, database schema and coding standards, then implement the feature consistently with your current codebase. I’ll test critical paths and edge cases before submitting the PR. Available to start immediately and ready to work within your existing Git workflow. Best Regards, Ashish Malik Full Stack Developer & Digital Marketing Expert

@abhayk49

Hi, I can extend your existing Spring Boot application with clean, maintainable REST APIs while fitting seamlessly into the current architecture. ✔ Java, Spring Boot & Core Java OOP ✔ REST APIs with predictable JSON responses ✔ MySQL integration using JPA/MyBatis ✔ Controller, Service & Repository layers ✔ Unit, integration & Postman/cURL testing ✔ Proper validation, exception handling & HTTP status codes ✔ Clean Git commits, documentation & README ✔ Basic HTML/CSS/JavaScript changes if required I have 6+ years of professional Java experience building Spring Boot REST APIs, database-driven applications, and production backend services. I can quickly understand the existing codebase and deliver the feature without unnecessary refactoring. Ready to start. Best regards, Abhay Kumar

@codeandcommand

Java is already running strong on Spring Boot, so I'd stay inside your existing structure rather than bolt something on sideways: extend the service and repository layers, keep the REST contracts consistent, and add tests for the new endpoints. I can start right now and have a working version ready by Thursday. The 8 to 15 USD range and timeline are based on the description alone. Once I see the actual endpoints and data model, we'll firm both up, could go either direction depending on scope. Want me to send a quick plan?

@rohank2502

You need new fetch-and-submit endpoints on your existing app, wired to your database, with tests and a short setup note you can review with confidence. I can start right now. In 24 to 48 hours you get a live working sample of this exact feature, so you can try fetch and submit before we touch the rest of your app. The pull request will hold the working code, tests, any table changes, and a brief README. I keep it tidy because you review carefully, and errors come back with clear status messages. Which data should the first sample fetch and submit?