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You’ll be taking charge of the server-side work for my application, and the core focus is clear: build a set of robust, well-documented RESTful APIs in Java. All persistence logic, request/response handling, and authentication layers will live in this codebase, so clean architecture and disciplined error handling matter a lot. Here’s what I expect to come out of this collaboration: • A modular Java codebase (Spring Boot or similar is fine) that exposes the required REST endpoints. • Well-structured data models mapped to the underlying database of your choice, with migrations/versioning in place. • Postman (or equivalent) collection and Swagger/OpenAPI documentation that let any front-end or third-party consumer hit the routes without guessing. • Unit and integration tests covering the critical paths, runnable via a single command. • Dockerfile or clear run instructions so I can spin the service up locally and in staging without surprises. Acceptance criteria: each endpoint must return the specified payload shape, pass all tests, log meaningful errors, and stay under 200 ms average response on my staging box. Let me know the frameworks or libraries you prefer, your timeline for the first set of endpoints, and any questions you have before we start.
Project ID: 40616114
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250 freelancers are bidding on average $442 USD for this job

Hi, I notice your project needs clear API endpoints and good error handling, which can be tricky with complex data interactions. I will create a clean setup using Spring Boot with well-structured data models and easy-to-follow documentation. For testing, I’ll write unit and integration tests that run smoothly all together. Do you want the APIs to handle specific user roles or permissions from the start? Let’s chat about a plan and make something impactful together. Regards, Nick. I saw your interest in some projects like the ticketing and marketplace apps, and I’m excited to bring that experience into this project.
$250 USD in 3 days
8.1
8.1

⭐⭐⭐⭐⭐ Build Robust RESTful APIs in Java for Your Application ❇️ Hi My Friend, I hope you are doing well. I've reviewed your project requirements and see you're looking for a skilled developer to build RESTful APIs in Java. You have no need to look any further; Zohaib is here to help you! My team has successfully handled 50+ similar projects for API development. I will create a modular Java codebase using Spring Boot, ensuring clean architecture and disciplined error handling. ➡️ Why Me? I can easily build your RESTful APIs as I have 5 years of experience in Java development, focusing on API design, database integration, and documentation. My expertise includes creating well-structured data models, implementing authentication layers, and ensuring efficient error handling. Additionally, I have a strong grip on tools like Postman and Swagger for documentation. ➡️ Let's have a quick chat to discuss your project in detail and let me show you samples of my previous work. I'm looking forward to discussing this with you in chat. ➡️ Skills & Experience: ✅ Java Development ✅ Spring Boot ✅ RESTful API Design ✅ Database Management ✅ Postman Documentation ✅ Swagger/OpenAPI ✅ Unit Testing ✅ Integration Testing ✅ Docker ✅ Error Handling ✅ Modular Code Structure ✅ Version Control Waiting for your response! Best Regards, Zohaib
$350 USD in 2 days
7.9
7.9

Hi, You’re not just asking for endpoints , you need a backend that stays predictable when traffic, auth, and data rules start colliding. That’s exactly the kind of server-side structure I build with Java/Spring Boot: clean REST layers, mapped models, migrations, Swagger/OpenAPI docs, and tests that catch regressions before staging does. I’ve worked on API-driven systems where persistence, request handling, and authentication all had to stay disciplined and easy to maintain. I’d set this up with a modular architecture, clear error handling, Docker-ready delivery, and a Postman collection so your frontend or third-party consumers can integrate without guesswork. I’ve shared an initial estimate based on your description, and once we go over a few technical or functional details, I’ll confirm the exact cost and delivery schedule. If you’d like, I can start by shaping the first endpoints, database layer, and test coverage in a way that’s easy to extend. Hey, do you already have the endpoint list and database schema nailed down, or should I help define them first? Best regards, Asad
$250 USD in 10 days
7.1
7.1

Hello, I will deliver a modular Spring Boot API with clean layered architecture: controllers, services, repositories, all wired with proper exception handling and structured logging to meet your 200 ms response target. You will get Flyway migrations for schema versioning, Swagger/OpenAPI docs, a Postman collection, and a Dockerfile for local and staging deployment. Tests will run via a single `mvn test` command. On a similar API build, adding a global exception handler with correlation IDs made debugging production issues significantly faster. I will set yours up the same way. Questions: 1) How many endpoints are we looking at for the first milestone, and do any require file uploads or async processing? 2) Do you have a preferred database (PostgreSQL, MySQL), or is that open? Looking forward to talking through the details. Kamran
$281 USD in 10 days
7.5
7.5

Hello, I have 11 years of professional experience designing and developing enterprise-grade Java applications, RESTful APIs, and Spring Boot microservices. Your project aligns perfectly with my expertise. I specialize in building secure, scalable, and well-documented backend services with clean architecture and production-quality code. ### My preferred technology stack * Java 17+ * Spring Boot * Spring Data JPA / Hibernate * Spring Security (JWT Authentication) * PostgreSQL (or MySQL if preferred) * Flyway/Liquibase for database migrations * Swagger / OpenAPI * JUnit 5 & Mockito for unit testing * Docker for containerized deployment * Maven for build management ### What I will deliver * Modular Spring Boot REST API * Clean layered architecture * Database schema with version-controlled migrations * Secure authentication and authorization * Robust exception handling and logging * Optimized database access * Swagger/OpenAPI documentation * Postman collection * Unit and integration tests * Dockerfile and deployment instructions * Well-documented source code Throughout the project, I provide regular progress updates, milestone-based delivery, and transparent communication to ensure every endpoint is reviewed before completion. I am available to start immediately and would be happy to discuss the API specifications, database design, and project timeline.
$250 USD in 2 days
7.3
7.3

Hello, I checked your "Java RESTful API Development" project and it looks like understanding the existing workflow will be important before making any changes. I've worked on similar PHP projects involving java, j2ee, sql, software architecture, freelancer api, restful, docker, api development, spring boot, rest api and prefer delivering work in small milestones so everything stays easy to review and adjust if needed. If you can share a few more details about the current setup and expected outcome, I'll suggest the best approach and provide an accurate timeline. ⭐ 5.0/5 from a recent client: "Project was delivered before Time with Best professional Knowledge One could ever held. Thanks for the support" Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.
$450 USD in 9 days
7.1
7.1

Hi, With nearly two decades of experience, IT Flex Solutions India has consistently delivered quality web and mobile app solutions crafted for lasting business growth. We're well-versed in a variety of technologies, including Java, REST API development, Spring Boot, and SQL database management, all of which directly align with your project's requirements. Our extensive skills and expertise equip us to develop modular and well-documented codebases with rigorous error handling policies - precisely what your project needs. We understand the value of clean architecture and streamlined processes, particularly in a project as critical as yours. Hence, our promise extends beyond routine development - we'll provide comprehensive Postman collections, documentation via Swagger/OpenAPI, as well as unit and integration tests that cover the most crucial paths. Additionally, we'll create a detailed Dockerfile/run instruction set to ensure the deployment process proceeds without any surprises for you. Thanks, SBM
$500 USD in 7 days
7.3
7.3

I propose to develop robust RESTful APIs in Java using Spring Boot, focusing on modularity, clean code, and scalability. I will create well-structured data models, thorough documentation, and comprehensive testing with fast response times. By leveraging proven Java frameworks, I aim to deliver high-quality APIs that meet your project milestones and exceed your expectations. Let's collaborate to ensure the success of your project.
$675 USD in 5 days
6.7
6.7

Hi, I reviewed the project and understand you need robust, well-documented Java RESTful APIs with server-side persistence, request/response handling, and authentication in one codebase. I’ll build a modular Spring Boot (or similar) service exposing the REST endpoints, with disciplined error handling, mapped data models, and migrations/versioning. I’ll include Docker support, plus Swagger/OpenAPI and a Postman-ready collection so consumers can call the routes confidently. Quality will be ensured with unit and integration tests runnable via a single command, meaningful logs, and clean architecture for easy staging and future growth. Let’s discuss here now.
$250 USD in 30 days
6.8
6.8

Hi, Thank you for posting the good task! As a fan of back-end development, my main skills are Java, Spring Boot, RESTful APIs, SQL/NoSQL databases, and Docker, so I have strong experience building secure, scalable, and well-documented backend services with clean architecture. Plus, the fact that your project focuses on developing a modular Java RESTful API aligns directly with my experience. I can build a maintainable Spring Boot application with clean request/response handling, authentication, robust error handling, and optimized database access while keeping the codebase easy to extend in the future. My approach will be to design a layered architecture, implement REST endpoints with proper validation, integrate database migrations using Flyway or Liquibase, generate Swagger/OpenAPI documentation, provide a complete Postman collection, write comprehensive unit and integration tests, and deliver a Dockerized application with straightforward deployment instructions. I will also optimize performance to meet your response time target and ensure meaningful logging throughout the application. - Do you already have the API specifications and database schema, or should I help design them? - Which authentication method do you prefer (JWT, OAuth2, or another solution)? I can finish your task perfectly so that we can bring good results quickly. Let’s discuss the technical details and timeline so I can get started right away! Best regards, Diah
$500 USD in 7 days
7.2
7.2

HELLO, I HAVE REVIEWED YOUR REQUIREMENTS AND UNDERSTAND THAT YOU NEED A ROBUST JAVA-BASED RESTFUL API BACKEND WITH CLEAN ARCHITECTURE, SECURE AUTHENTICATION, DATABASE INTEGRATION, AND COMPLETE DOCUMENTATION. I have 10+ years of experience in Java development, Spring Boot, backend architecture, REST API development, and database-driven applications. I can build a scalable and maintainable API system with proper request/response handling, validation, error management, and performance optimization. MY DEVELOPMENT APPROACH → API Development → Build modular RESTful APIs using Java Spring Boot with clean layered architecture. Database Integration → Design optimized data models with migrations/version control using JPA/Hibernate. Security Implementation → Implement authentication and authorization with best practices. Documentation & Testing → Provide Swagger/OpenAPI documentation, Postman collection, unit/integration tests, and complete API details. Deployment Setup → Deliver Docker configuration and clear setup instructions for local and staging environments. I am ready to start with the initial API development and deliver a reliable backend solution aligned with your requirements. I eagerly await your positive response. Thanks
$450 USD in 7 days
6.9
6.9

Hi, I understand you need a clean, scalable Java REST API with proper architecture and documentation, not just endpoints. I’ve built a similar Spring Boot service for an internal tool where we used Flyway for migrations and tests to catch edge cases early, though the first Docker setup needed some cleanup. I’d approach this using Spring Boot with layered architecture because it keeps the code maintainable while avoiding tight coupling to the database. The biggest improvement will come from defining clear contracts for each layer and enforcing them with tests. I’ll keep the build pipeline straightforward so you can deploy updates without surprises, and we’ll verify performance before merging. The goal is a stable API that frontends can rely on without constant adjustments. Happy to discuss the stack and get started right now. Thanks, Denis.
$250 USD in 3 days
5.9
5.9

Hi, You're building a modular Java REST API with Spring Boot, where persistence, auth, and request/response handling are separated and documented. I’ve worked on similar services, focusing on clear contracts and tests that run via command. A pragmatic approach keeps migrations versioned and endpoints documented. Execution approach: I’d start by validating the current flow against the contract, then lock data models, implement endpoints, and wire in tests and docs in parallel. I’d also add Dockerfile and run instructions to ensure parity across local and staging. One technical risk / key challenge: Migration drift between environments could cause startup or query shape issues. Two clarification questions: - What DB do you prefer, and should seed data live in migrations or as a separate bootstrap step? - Do you have auth standards (JWT/OAuth) and token lifetimes we must align with in responses? If we're aligned, I’d be happy to walk you through implementation plan before we get started. Best regards, Brandon
$300 USD in 3 days
6.0
6.0

As a software development company with deep expertise in API Development, including Java and RESTful architecture, we at Web Crest are uniquely positioned to deliver quality work for your project. Our team has a proven track record of creating clean, modular codebases using frameworks like Spring Boot for APIs that meet high-performance benchmarks. We prioritize disciplined error handling and clean architecture when building persistence logic, request/response handling, and authentication layers—exactly what your project requires. Additionally, our experience encompasses the full range of expectations you have laid out for the project. We consistently deliver well-structured data models with reliable migrations and versioning strategies paired with comprehensive documentation that allows seamless integration with front-end or third-party consumers. You can expect extensive unit and integration tests along with clear run instructions or Dockerfiles to ensure smooth local/spinning service deployment. Another advantage of choosing us is our dedication to outstanding support even after the project is completed. We understand that technical needs evolve over time, so we commit to being there for you whenever you need us.
$500 USD in 4 days
6.5
6.5

Hello Sir/MAM I am a Skilled Full Stack Developer. Having rich experience in Java , C++ , C , C# , Python , Eclipse , Sql , Mysql , .Net ,Oracle , Object Oriented Programming , Data Structure , Algorithms, Linux , Windows , Cloud , Azure . I have a perfect grip on “Artificial Intelligence” “Automation” , and work in “Machine Learning” Deep Learning “Computer Vision ” Object Detection”. My track record as demonstrated in my 100% job completion and 5-star review rating showcases My ability to deliver exceptional results on time and with utmost quality I believe that my skill set makes me the ideal candidate for this project Please come on chat we will discuss more about this I will be waiting for your reply . Thanks and Best Regards
$251 USD in 2 days
6.4
6.4

Good Day! I have carefully analyzed your project and can develop robust Java RESTful APIs with clean architecture, Spring Boot, secure authentication, optimized database integration, comprehensive documentation, and reliable testing. I can deliver a scalable backend with Docker setup, Swagger/OpenAPI docs, and performance-focused implementation. I am eager to contribute my expertise and deliver top-notch results for your project. Let's discuss the project further in chat or let's have a quick call! Best regards, M Adeel.
$250 USD in 3 days
5.9
5.9

Hi, I can handle this in Java with Spring Boot and keep the structure clean, modular, and easy to extend. I’d set it up with REST endpoints, auth, database migrations, Swagger/OpenAPI, Postman collection, and tests so the API is straightforward to consume and maintain. I also pay close attention to error handling, response consistency, and staging performance targets. If you want, I can start with the first endpoint set and share that quickly for review.
$500 USD in 7 days
5.5
5.5

Hi, I’d structure this around Spring Boot, PostgreSQL, Flyway migrations, JWT-based authentication, OpenAPI documentation, and automated unit/integration tests. The first step would be defining the API contracts and database model so the frontend can work against stable payloads from day one. My main background is in ASP.NET/C# backend systems, so I’d only take this on if you’re comfortable with strong backend architecture experience applied to Java.
$750 USD in 3 days
5.3
5.3

As an experienced technologist, I bring to your project a strong ability to build APIs that are not only robust, but are also performant and well-documented. I have a deep understanding of RESTful principles and the importance of clean architecture - ensuring that every component of the server-side work is meticulously designed with efficient and comprehensive error handling. My proficiency in Java (particularly with Spring Boot), SQL, and Docker will contribute significantly towards building a modular and scalable codebase for your application. Along with these, my experience with Test-Driven Development will ensure that all critical paths of your API are thoroughly covered with unit and integration tests that can be executed effortlessly. Additionally, I have a talent for crafting user-friendly endpoints leveraging technologies like Postman and Swagger/OpenAPI documentation keeping in mind third-party consumers as well. This combined expertise means I can flawlessly deliver what you need whilst meeting the strict acceptance criteria set out – from maintaining the specified payload shape to an average response time under 200ms on your staging box. With me on board, you can be confident that your project will scale beautifully while staying aligned with your long-term business objectives.
$300 USD in 6 days
5.3
5.3

Hello there. I hope you are donig well. Having successfully developed numerous RESTful APIs, I have a strong track record in creating modular Java applications using frameworks like Spring Boot. My experience includes building robust backends that integrate seamlessly with front-end solutions, ensuring efficient data handling and user authentication. I understand that your project requires well-documented RESTful APIs that adhere to clean architecture principles. To achieve this, I will implement a structured codebase with clear error handling and logging mechanisms, ensuring each endpoint meets the specified performance criteria. I will deliver a high-quality API with comprehensive documentation using Swagger/OpenAPI, alongside a complete suite of unit and integration tests. My approach emphasizes clean code practices and efficient database design to ensure optimal performance and scalability. Please feel free to reach out to me. I look forward to working with you. Best regards, Billy Bryan
$450 USD in 3 days
4.9
4.9

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