Java Spring Boot Backend Development | REST APIs & Microservices

@vishal1145

Your microservices will bottleneck if you're sharing a single database instance across services - this creates tight coupling that defeats the purpose of distributed architecture. Without proper service mesh implementation, you'll also face cascading failures when one service goes down. Before architecting the solution, I need clarity on two things: What's your expected request volume per service (are we talking 100 or 10K requests/second)? And do you need event-driven communication between services or are synchronous REST calls sufficient for your use case? Here's the architectural approach: - SPRING BOOT + MICROSERVICES: Implement domain-driven design with separate databases per service, using Saga pattern for distributed transactions to maintain data consistency without tight coupling. - REST API + JPA/HIBERNATE: Build APIs with proper pagination, field filtering, and N+1 query prevention using EntityGraph - I've reduced response times from 2.5s to 180ms using these optimizations. - POSTGRESQL + MONGODB: Design polyglot persistence where PostgreSQL handles transactional data and MongoDB stores unstructured logs, with connection pooling configured for 500+ concurrent connections. - MAVEN + GIT: Set up multi-module Maven structure with shared libraries, automated testing via JUnit/Mockito achieving 85%+ coverage, and CI/CD pipeline for zero-downtime deployments. I've built 8 Spring Boot microservices architectures that scaled from prototype to handling 50K daily active users. Let's schedule a 15-minute call to discuss your service boundaries and failure scenarios before committing to the build.

@ParasTech7

Hello, I’d be a strong fit for this project. I’m an IIT graduate with 21+ years of software engineering experience and currently working as a Principal Software Engineer at a major tech company. I have extensive experience building scalable backend systems using Java, Spring Boot, Spring Security, JPA/Hibernate, microservices architecture, REST APIs, PostgreSQL, MySQL, and MongoDB. I’ve worked on high-performance enterprise applications involving secure APIs, distributed systems, database optimization, caching, testing, and production deployments. I can help build clean, maintainable, and production-ready backend services with proper architecture, unit/integration tests, documentation, and deployment support. I’m also comfortable working in Agile environments with Git-based collaboration and API testing tools like Postman. Additionally, I have experience integrating AI/LLM capabilities into backend systems when required. My focus is always on scalable architecture, clean code, performance optimization, and long-term maintainability.

@Jennycreation

Hello! I'm Priyanka, the leader of a seasoned team with over 15 years of comprehensive experience in backend development. With a deep understanding of Java Spring Boot, REST APIs, and Microservices, we can create the scalable and maintainable backend application you need. My team is well-versed in integrating PostgreSQL, MySQL, and MongoDB databases while optimizing performance and improving database queries. We not only write the code but also ensure its cleanliness, maintainability, and provide thorough documentation. Additionally, our proficiency in Git helps us collaborate effectively using version control and Agile practices for efficient project management. Critical to my work philosophy is the desire to solve problems effectively. I believe this aligns perfectly with your project's needs which require a developer committed to delivering high-quality software. Satisfied clients and value-based services are what I strive for. Let us prove our worthiness by providing you with a production-ready backend application, secure REST APIs, efficient database schema and integrations along with test cases and documentation thanks

@KarthikTechCon

Hello, I’m Karthik from Resonite Tech with 15+ years of experience in Java, Spring Boot, Microservices, REST APIs, and enterprise application development. I can help design, develop, and maintain scalable backend systems with a strong focus on performance, security, and maintainability. ✔ Java & Spring Boot Development ✔ REST API & Microservices Architecture ✔ PostgreSQL, MySQL & MongoDB Integration ✔ JPA/Hibernate, JDBC & Query Optimization ✔ Unit & Integration Testing ✔ Debugging & Performance Tuning ✔ Git-Based Agile Development ✔ API Documentation & Deployment Support ✔ AI/LLM Integration Experience I have successfully delivered enterprise-grade applications, analytics platforms, eCommerce systems, and cloud-native solutions. My approach emphasizes clean architecture, well-documented code, robust testing, and scalable design. I’m available to start immediately and would be happy to discuss your project requirements. Best Regards, Karthik B Resonite Tech

@belotefreelancer

"I have gone through your description. "This is my area of specialization, i can get it done 100 % perfectly well. Please ping me in person. I can help you to complete all tasks. I have hands-on experience in this field. We have already done similar types of projects. Connect with us for more details. Rest assured your satisfaction is guaranteed." Looking forward to your response." Thank you for your time and I am confident that we will be a great fit for this project. Best,

@DigitalNightOwl8

Hi Mate , Good evening! I’ve carefully checked your requirements and really interested in this job. I’m full stack node.js developer working at large-scale apps as a lead developer with U.S. and European teams. I’m offering best quality and highest performance at lowest price. I can complete your project on time and your will experience great satisfaction with me. I’m well versed in React/Redux, Angular JS, Node JS, Ruby on Rails, html/css as well as javascript and jquery. I have rich experienced in MongoDB, MySQL, PostgreSQL, JSP, J2EE, JavaScript, Spring Boot, Microservices, Java and REST API. For more information about me, please refer to my portfolios. I’m ready to discuss your project and start immediately. Looking forward to hearing you back and discussing all details.. Looking forward to hearing from you soon

@raeedawer

Hi, I’m a Java Spring Boot Developer with 4+ years of experience building REST APIs, backend applications, and database-driven systems. My expertise includes Java, Spring Boot, Spring Security, JPA/Hibernate, MySQL, PostgreSQL, REST APIs, Git, Maven, and Microservices. I have developed secure and scalable applications, including booking management systems with authentication, role-based access control, payment tracking, and dashboard functionality. I have also completed multiple Java and Spring Boot projects with excellent client feedback, including API development, Spring Security implementation, AWS deployment, and application enhancements. I can deliver clean, maintainable code, optimized database queries, comprehensive testing, and deployment support if required. I would be happy to discuss your requirements and get started.

@pluralcode16

With vast experience in the Java Spring Boot ecosystem, I am wholeheartedly dedicated to the craft of creating scalable applications that are efficient and easy to maintain. Over the years, I've built a strong foundation in developing RESTful APIs that suit the unique needs of every project. Additionally, my extensive knowledge in microservices architecture will prove handy in maintaining your backend infrastructure. Efficiently integrating databases is yet another skill that sets me apart. Whether it's PostgreSQL, MySQL or MongoDB, I'm well-versed with their connection to Spring Boot applications. My talent for optimization enables me to write robust database queries and enhance application performance. Having prior experience with Git and Agile development practices, I assure you smooth collaboration and timely deliveries. My proficiency in building unit tests and well-documented code ensures your application remains secure and scalable at all times.. Choose me for quality work within the requested timeframe

@Abuzar00

With my five years of full-stack development experience encompassing complex tasks ranging from microservices to payment systems, I find myself a perfect match for your project requirements. I've proficiently employed Java Spring Boot and REST APIs integration while delivering enterprise fintech solutions at scale. Not to mention, my adeptness in using MySQL and PostgreSQL for database optimization will ensure smooth performance and efficiency in your backend application. Furthermore, I bring to the table a deep appreciation for well-documented, clean, and maintainable code - a quality that I believe resonates with your expectations. My ability to build automation workflows, along with running 20,000+ product records synchronizations showcases my skills in handling complex system integrations adeptly. Springboarding off of this proficiency, harmonizing the PostgreSQl, MySQL or MongoDB databases will be an added advantage. Once again, whether it is about developing RESTful APIs or creating a test-driven deployment-ready system with dynamic functionalities scale-ready architecture, I've continuously proven my ability to handle these responsibilities proficiently. I tend to findByMyself driven by the satisfaction of delivering high-quality software on time and within budget constraints. Let's team up to create an exceptional software solution that aligns perfectly with your vision.

@GaneshDhamande

Hello there, I will do you microservice & api for your project. I have 6+ years experience in IT industry with good knowledge of Java Spring Boot with good hand on databases. Let connect for your project in detail Thanks Ganesh D

@haitham1996

Hii,I’m a Software Engineer Udacity certified in Full Stack Web Dev and Data Analysis track with over 4+ years of experience building scalable backend systems, RESTful APIs, and automation solutions using these tracks including Java (Spring Boot), Python/Django, and modern low-code tools like N8N. I focus on turning complex requirements into efficient, reliable systems that save time and drive real results. With experience across enterprise, freelance, and self-driven projects, I bring strong problem-solving skills, adaptability, and a results-oriented mindset to every project. I’d be glad to connect and explore how I can add value to your team or business.

@abhayk49

Hi, I’m a Java backend developer with strong experience in Spring Boot, microservices, and database-driven applications, and I can help build and maintain scalable backend systems. ✅ Relevant Expertise ✅ Java (8–21) & Spring Boot ✅ REST APIs & Microservices Architecture ✅ JPA/Hibernate & JDBC ✅ PostgreSQL, MySQL & MongoDB ✅ Maven, Git & Agile workflows ✅ Unit & Integration Testing ✅ Performance Optimization & Debugging ? Relevant Experience • Built microservice-based applications with Spring Boot, JWT security, and scalable REST APIs. • Developed ERP, CRM, marketplace, and enterprise backend systems using PostgreSQL/MySQL. • Worked on cloud-ready applications with Docker, CI/CD, and high-performance database optimization. ? How I Can Help • Develop secure, scalable REST APIs • Design and implement microservices • Optimize database queries and application performance • Create comprehensive unit and integration tests • Deliver clean, maintainable, and well-documented code ✔ Deliverables ✔ Production-ready Spring Boot backend ✔ Secure REST APIs & database integrations ✔ Test cases and documentation ✔ Deployment support if required I focus on clean architecture, scalability, and high-quality backend development. Looking forward to discussing your project. Best regards, Abhay

@souravsasmal14

With a strong background in backend development and a particular expertise in Java Spring Boot and REST APIs, I believe I have the skills required to turn your project into a reality. Having leveraged these technologies in my past projects over the years, I have honed my ability to design efficient microservices architectures and integrate different types of databases including PostgreSQL, MySQL, and MongoDB - all skills very much at the core of your requirements. What sets me apart is not just my knowledge of these tools but also my ability to synergize with other developers effectively using collaborative tools like Git, while ensuring smooth workflow using Agile development practices. This allows me to create more than just code but rather well-documented nifty solutions that are consistently maintainable. At the core of it, I am committed to providing clean code that counts which meets performance benchmarks. Pairing this with my vast experience in unit and integration testing, I assure you of an application that not only fulfills all your requirements but unleashes its full potential on delivery. Lets connect to discuss further how we can make your vision a reality!

@ViktorTrefilov01

✨✨✨Java Spring Boot Expert✨✨✨ Hi, I can start working right now. I have extensive experience building scalable backend applications using Java, Spring Boot, Spring Framework, JPA/Hibernate, PostgreSQL, MySQL, and MongoDB. I have developed REST APIs, microservices, authentication systems, and high-performance enterprise applications with a strong focus on clean architecture, maintainability, and security. My approach is to design a well-structured backend using Spring Boot best practices, build secure and scalable REST APIs, optimize database queries, implement comprehensive testing, and ensure smooth integration with external services when required. I am comfortable working with Git-based workflows, Agile development processes, API documentation, and production deployments. I can deliver a production-ready backend application with database integrations, well-documented APIs, unit and integration tests, deployment support, and clean, maintainable code that is easy to extend as your platform grows. I also have experience integrating AI/LLM services when future enhancements require them. Let’s connect via chat to discuss the project requirements further. Regards,

@ultimate98k5

Hello, I am an experienced backend developer with strong expertise in Java, Spring Boot, REST API development, and microservices architecture. I have built and maintained scalable enterprise applications with PostgreSQL, MySQL, and MongoDB integrations. For your project, I can: • Design and develop secure, production-ready REST APIs using Spring Boot • Build scalable microservices with clean architecture principles • Implement JPA/Hibernate and optimize database performance • Develop well-structured database schemas and integrations • Create comprehensive unit and integration test coverage • Debug, troubleshoot, and optimize existing applications • Follow Git-based workflows and Agile development practices • Provide clear technical documentation and deployment assistance My experience includes: ✓ Java, Spring Boot, Spring Framework ✓ REST APIs & Microservices ✓ JPA/Hibernate, JDBC ✓ PostgreSQL, MySQL, MongoDB ✓ Git, Maven, Postman ✓ React.js integration (when required) ✓ AI/LLM API integrations and backend automation I focus on writing clean, maintainable, and well-documented code that is easy to scale and support in production environments. I would be happy to discuss your project requirements, architecture expectations, timelines, and deployment needs in detail. Looking forward to collaborating with you. Best Regards, Team UC

@toqeer74

The emphasis on creating robust RESTful APIs and a microservices architecture indicates a significant need for efficient data handling and scalability. Leveraging Spring Boot's strengths, I can design a system that seamlessly integrates with PostgreSQL or MySQL, optimizing database queries to enhance performance. With a focus on clean, maintainable code, I will produce thorough documentation and unit tests to ensure reliability. The initial deliverable will be ready in 15 days, delivering a production-ready backend application aligned with your goals. What's your deadline, when do you need this live?

@sgwtechnology

Hi Mate , Good evening! I’ve carefully checked your requirements and really interested in this job. I’m full stack node.js developer working at large-scale apps as a lead developer with U.S. and European teams. I’m offering best quality and highest performance at lowest price. I can complete your project on time and your will experience great satisfaction with me. I’m well versed in React/Redux, Angular JS, Node JS, Ruby on Rails, html/css as well as javascript and jquery. I have rich experienced in MongoDB, MySQL, PostgreSQL, JSP, J2EE, JavaScript, Spring Boot, Microservices, Java and REST API. For more information about me, please refer to my portfolios. I’m ready to discuss your project and start immediately. Looking forward to hearing you back and discussing all details.. Looking forward to hearing from you soon

@tamannarajput18

As a skilled and dynamic Full Stack Developer, I have extensive experience that aligns perfectly with your project requirements. My proficient understanding of Java and Spring Boot gives me the ability to design cutting-edge, maintainable, and scalable backend applications adhering to REST API best practices. One of my core competencies is designing efficient database schemas and optimizing queries for improved performance. I've worked extensively on unit-testing and integration testing tools for producing production-ready deployments and can readily apply these skills to your backend development projects. I'm eagerly up for the challenge of ensuring clean, maintainable, secure code enforced by collaborating through Git via Agile development practices. My past experience and current skillset make me an ideal candidate for this project, as it not only requires technical prowess but also a problem-solving mindset and commitment to delivering high-quality software.

@sjohn117

Hi there, I'm Sean, a Full-Stack Developer with over 10 years of experience specializing in scalable backend solutions using Java and Spring Boot. You need a skilled developer to create and maintain robust backend applications, and I’m confident in my ability to deliver exactly that. In my previous projects, I've successfully designed and implemented RESTful APIs and microservices architectures, optimizing database queries with PostgreSQL and MySQL. My approach includes writing clean, maintainable code while adhering to Agile principles and utilizing Git for effective collaboration. I prioritize performance and security, ensuring that the applications I deliver are production-ready. I can provide the first working milestone within a week, which includes a secure REST API and database schema designs. What specific features or functionalities are you most interested in for the backend application? Best regards, Sean