Spring Boot REST API Build

@ParasTech7

I have 21 years of experince, Pricipal Software engineer and IIT grad, I have extensive experince with springboot and spring MVC, spring security and jwt, have built enterprise grade application for B2B chemical trading platform, i have understood your requirements and can deliver it.

@HNMN3

Landing a seasoned team is crucial for executing a project of this magnitude efficiently, and that's where we come in. With over a decade of experience, we offer more than just standard skills but an unwavering dedication to providing best-in-class solutions. Our accomplished developers are well-versed in Java and JSON, which are pivotal for your project. Additionally, while our primary expertise lies in Python, our adeptness at designing modular, maintainable systems across different languages makes us an excellent choice for tackling this Spring Boot REST API venture. We understand the intricacies involved in connecting to multiple data sources such as MySQL and MongoDB and have built various APIs with similar functionalities. Further, our experience with implementing JWT-based authentication aligns perfectly with your project's needs. Moreover, our portfolio underscores a strong commitment to documentation, adhering to versioned endpoint designs, and unit testing - essential traits that guarantee clean code throughout the development journey. Our delivery package includes thorough documentation of all delivered files; SQL/Mongo scripts or migrations; and detailed instructions in the README file - making the transition from development to deployment easier for you. Embracing 'best practices' is not just a buzzword for us but the foundation upon which we build all our projects. !

@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,

@tomatorivera

Hi there! I'm a java developer with over 4 years of experience. I worked a lot with Spring Boot 3.x and RESTful API. I understand your needs, I can help you building this API for CRUD operations with Spring, JPA, MySQL and MongoDB, please contact me ASAP to start working. Regards, Rivera O., Ramiro T.

@harfarooqi

Hi I have seen your job description and interested in this project. Please provide more details about the project . Best

@anshumanvermaUK

Hi I can build a clean, modular Spring Boot 3.x REST API with JWT-based authentication, dual data sources (MySQL + MongoDB), and scalable CRUD architecture using JPA and Spring Data. The project will include versioned endpoints, security best practices, OpenAPI docs, migration scripts, and concise test coverage for production readiness. Code will be structured for easy extension of new entities. Thanks Anshuman

@rishi9343

As an experienced full-stack developer that has worked with Java for over a decade, I'm confident in my ability to not just build the clean and robust Spring Boot REST API that you're seeking, but to do it in a way that's optimized and aligned with your specific requirements. I've spent several years familiarizing myself deeply with the ins and outs of both MySQL and MongoDB, thereby making me skilled at configuring separate data sources for each. Moreover, my expertise in Java will contribute positively to this project since you require a Spring Boot 3.x app. Given the length of time I've been in the industry, I have come across specifications like those you provided on numerous occasions. User-authentication-focused apps are well within my repertoire, as I have used stateless JSON Web Tokens (JWTs) in previous projects as well. In fact, one of my recent projects involved creating multiple domain entities with JPA and Spring Data for various CRUD operations. Plus, my background in databases makes me adept at adding new entities swiftly. Lastly, what sets me apart is not just my competence in resolving complex technical issues but ensuring my projects are well-documented and easy to maintain even after completion. My deliverables include complete sources in a Git repository and detailed instructions on building and running the app. I’m excited to discuss more about your projec

@pryrnjn

I have 14+ years of experience in Backend development primarily in Java spring/springboot. Let's connect and discuss more about the project.

@bhartimalu

Hello, I can build a clean, production-ready Spring Boot REST API with JWT-based authentication, full CRUD operations, and integration with both MySQL and MongoDB as per your requirements. I follow best practices with layered architecture, clear versioned endpoints, and comprehensive documentation. I will deliver complete source code, schema migrations, Postman/OpenAPI docs, and setup instructions within the agreed timeline. Regards, Bharti

@hamed9851

Hi, With 5+ years of full-stack experience, I've built production-grade Spring Boot APIs with dual-database setups and can deliver exactly what you need — clean, modular, and ready to scale. Tech Stack Spring Boot 3.x (Maven/Gradle) MySQL via JPA + Hibernate MongoDB via Spring Data JWT (issuance, refresh, validation) with Spring Security What I'll Build Stateless JWT auth — register, login, token refresh, validation middleware Full CRUD across domain entities (profiles, products, orders + extensible for new ones) Dual datasource config — MySQL and MongoDB cleanly separated Versioned endpoints (/api/v1/...) returning consistent JSON responses Modular structure so new entities plug in with minimal changes Deliverables Complete source in a Git repo SQL migrations + MongoDB init scripts Postman collection + OpenAPI (Swagger) docs README with build/run steps and sample JWT flow Unit + integration tests with coverage reports My Approach Clean layered architecture (Controller → Service → Repository), no shortcuts, no tight coupling. Every module is independently testable and easy to extend. Share your schema details once we kick off and I'll structure entities accordingly from day one. Happy to share a milestone plan. Let's build this right.

@Hemantt841

Thank you for considering me for your Spring Boot REST API Build project. Your detailed requirements for a secure user authentication system and full CRUD operations caught my attention, and I am excited about the opportunity to work on this project. With over 7 years of experience in software development, I have successfully completed similar projects that required building robust REST APIs with Java Spring Boot. Here's how I plan to approach this project: Key Steps: - Set up project structure using Spring Boot 3.x and Maven - Implement JWT token handling with spring-security for secure user authentication - Configure separate data sources for MySQL and MongoDB using JPA and Spring Data - Design clear, versioned endpoints for CRUD operations returning JSON - Document code thoroughly and provide a Postman collection for testing Technologies/Tools: - Spring Boot 3.x, Maven - JWT implementation with spring-security - MySQL and MongoDB integration with JPA and Spring Data - Postman for API testing In a recent project, I built a similar REST API for a client that required secure authentication and CRUD operations on multiple domain entities. The outcome was a scalable and efficient system that met all the client's requirements. To ensure a successful outcome for your project, could you please clarify if you have any specific requirements for error handling or logging mechanism

@vanshd2

I’m a backend-focused Java developer with experience building clean, production-ready and scalable REST APIs using Spring Boot 3.x. I have implemented stateless JWT authentication with Spring Security, including access and refresh token flows, token validation filters, and proper lifecycle handling. I structure authentication separately so it remains secure and maintainable as the system grows. I have worked with MySQL using JPA/Hibernate and MongoDB via Spring Data, and I’m comfortable configuring multiple data sources within the same application. The project will follow a modular and scalable architecture, allowing new entities and features to be added without affecting core layers. I design versioned REST endpoints (/api/v1/…), maintain clear service boundaries, and ensure proper validation and exception handling. I also write concise unit tests to support coverage reporting and long-term stability. You’ll receive a well-structured Git repository, migration scripts for database setup, and a detailed README explaining build steps and the complete JWT authentication flow. I can begin with the authentication module and core project structure as the first milestone to ensure a solid foundation.

@hrasel2003

Hello Sir, I am very interested in your Spring Boot REST API project. I have experience building secure, production-ready backend systems using Spring Boot 3.x, Spring Security, JWT, MySQL, and MongoDB. I can deliver a clean, modular REST API with: • Stateless JWT authentication • Token generation (access + refresh) • Secure validation filter (middleware) • Refresh token flow • Spring Security integration • Dual database configuration • MySQL using JPA/Hibernate • MongoDB using Spring Data • Proper separation of repositories and services • Easy structure to add new entities quickly • Versioned REST endpoints • /api/v1/... • Clean JSON responses • Global exception handling • Standard response structure • Project quality • Spring Boot 3.x (Maven or Gradle as you prefer) • Layered architecture (Controller → Service → Repository) • DTO pattern + MapStruct or manual mapping • Unit tests for services and auth layer • OpenAPI (Swagger) or Postman collection • Clean README with JWT flow explanation • Migration scripts (Flyway/Liquibase) for MySQL • MongoDB base collection setup The code will be production-ready, well-structured, and easy to extend when you provide final schemas. I can share milestones and estimated timeline once we discuss scope details. Looking forward to working with you. Thank you.

@tushara05

I am an experienced Java backend developer with strong hands-on expertise in Spring Boot 3.x, Spring Security, JWT-based authentication, and REST API design. I can build a clean, production-ready, stateless REST API with secure JWT issuance, refresh, and validation, along with full CRUD support backed by MySQL (JPA/Hibernate) and MongoDB (Spring Data Mongo) using separate data source configurations. I follow best practices for modular architecture, versioned endpoints (/api/v1), JSON-based APIs, and clean exception handling, making it easy to extend with new domain entities. I will provide well-documented code, database scripts/migrations, concise unit tests for coverage, and a clear README with build/run steps and sample JWT flow, along with a Postman or OpenAPI collection for easy testing. I communicate clearly, meet deadlines, and focus on delivering maintainable, scalable code you can confidently take forward.

@rahul14101992

As I am Java developer so I think it would be easy to understand your requirement and complete task within time limit.

@deepanshus341

I’d be glad to build your production-ready Spring Boot REST API with MySQL and MongoDB integration. I bring 8+ years of experience in enterprise application development, delivering secure, scalable backend systems with clean architecture and strong testing practices. I can implement: • Spring Boot 3.x with Maven/Gradle • Stateless JWT authentication using Spring Security (token issue, refresh, validation filters) • Separate data sources for MySQL (JPA/Hibernate) and MongoDB (Spring Data Mongo) • Modular domain-driven structure so new entities can be added quickly • Versioned REST endpoints (/api/v1/...) returning clean JSON responses • CRUD APIs for users, products, orders, and future entities • OpenAPI/Postman collection for easy testing • SQL + Mongo scripts/migrations for base schemas • Concise unit tests with coverage-ready setup You’ll receive a complete Git repository, documented codebase, and a README covering build/run steps plus sample JWT flows. I prioritize clean code, best practices, and maintainability—so the service is easy to extend long-term. I’m ready to start immediately and look forward to discussing your schemas and timelines.

@arieki

I’m a senior backend engineer with extensive Spring Boot experience, and I can build a clean, well-structured REST API tailored to your requirements. I focus on high quality, proper error handling, and clear documentation. I will ensure the API is secure, scalable, and easy to maintain. Let's discuss endpoints and data models to deliver a reliable solution.

@skushal746

Hi, I've reviewed your requirements and I'm confident I can deliver a clean, production-ready Spring Boot REST API with JWT authentication and full CRUD support across MySQL and MongoDB. I have hands-on experience building this exact stack — Spring Boot microservices with MySQL and MongoDB integrations, Spring Security with JWT, and REST APIs with JPA and Spring Data. I've done this in production environments with measurable performance outcomes. My approach: Spring Boot 3.x (Maven), dual data sources for MySQL & MongoDB Stateless JWT auth — token issuance, refresh & validation via Spring Security Modular CRUD layer (JPA + Spring Data) — easily extensible for new entities Versioned endpoints (/api/v1/…), clean JSON responses Postman/OpenAPI collection, DB migration scripts, README & JUnit/Mockito tests Deliverables in a clean Git repo. Ready to start immediately once schema details are shared. Looking forward to working with you! Kushal Sharma Full Stack Engineer | Java, Spring Boot, MySQL, MongoDB

@salonip43

Hello, I’m a backend developer with strong experience in Spring Boot 3.x, Spring Security, JWT, JPA, and MongoDB integration. I can deliver a clean, production-ready REST API that meets your architectural and scalability requirements. Approach Spring Boot 3.x (Maven/Gradle) with layered architecture (Controller → Service → Repository). Stateless JWT authentication (access + refresh tokens) using Spring Security with custom filters and validation middleware. Dual database configuration: MySQL via Spring Data JPA (Hibernate) MongoDB via Spring Data MongoDB Versioned REST endpoints: /api/v1/... returning structured JSON responses. Modular design to easily add new entities with minimal boilerplate. Deliverables Complete Git repository DB migration scripts (Flyway/Liquibase optional) + Mongo collection setup OpenAPI (Swagger) documentation + Postman collection README with JWT flow, setup, and test instructions Unit & integration tests (JUnit + Mockito) with coverage-ready structure I focus on clean code, SOLID principles, and production-grade security. Happy to discuss schema details and timeline.