Backend Developer (Java Spring Boot/MongoDB) – 25-30 APIs

@n2rtechnologies

Hi, We build production-grade Spring Boot backends with MongoDB—25-30 APIs is exactly our pace. Quick question: are these APIs mostly CRUD operations, or do you need complex business logic and third-party integrations baked in? Let's talk details. Best Regards, Hasan

@rohitpatidar001

As a seasoned Backend Developer with more than 9 years of experience, I have a strong foundation in full-stack development and a deep understanding of Java Spring Boot and MongoDB. With expertise in building RESTful APIs in large-scale distributed systems, I'm well-equipped to handle the challenge of constructing your API layer – efficiently and securely. In my previous work, I've not only built critical functionalities similar to what you're seeking for User management, Product catalogs, and Transaction processing but ensured efficient data management resulting in faster query performance. I'm confident that I can deliver clean, well-documented code within our agreed-upon timeline – 15-day sprint. AI integration is another area of my specialization that could add great value to your project. Leveraging AI tools for code quality improvement and unit test generation can enhance the overall productivity and maintainability of the project. My experience includes integrating REST-based AI/LLM APIs into Java/Spring Boot backends efficiently while also being able to maintain clean system boundaries, reliability, and scalability. It's this dedication to robust architecture that has helped me lead successful development efforts across various sectors such as finance, compliance, healthcare, and e-commerce. Whether it's owning the backend architecture end-to-end or seamlessly integrating into your existing team and codebase

@craigd43

With years of hands-on experience in various backend technologies, including Java Spring Boot and MongoDB, I am confident that I can develop the 25-30 APIs you require efficiently and effectively. My knowledge of Java Spring Boot and MongoDB – essential for this particular project – means I can work in tandem with your existing systems, wasting no time in getting started. I understand that building a mobile app is only as good as its backend functionality. This understanding resonates in the work I deliver, as I've cultivated a results-driven approach to ensure high-quality code is produced swiftly. In fact, I'm able to consistently meet deadlines by adhering to strict timelines, allowing for full utilization of 15-day sprints. Moreover, my experience extends beyond coding proficiency. As an engineer who has been deeply involved in designing several user-facing applications, I understand not just how to manage databases using MongoDB but also understand the importance of secure data handling and efficient query performance when building RESTful APIs. With me on your team, you can be assured the backend of your mobile application will be reliable, dynamic and highly functional. Let's power your Flutter application with efficient APIs together!

@anshumanvermaUK

Hi I can help you build the required 25–30 REST APIs using Spring Boot with MongoDB, covering user, product, and transaction modules with clean and scalable architecture. I’ve worked on similar backend systems with full CRUD and secure data handling Thanks Anshuman

@Kavita9166

As an experienced Full Stack Developer and API specialist, I have worked on a myriad of applications and platforms that require robust database management and efficient API design. My adeptness with Java Spring Boot and MongoDB ensures an excellent match for your project’s specific requirements of building 25-30 APIs. Having previously created RESTful APIs for User management, Product catalogs, and Transaction processing, I understand the complexities involved in delivering streamlined CRUD functionality. One of my core strengths includes crafting clean architecture, which ensures code maintenance and scalability. Beyond development, I prioritize secure encoding and mindful query optimization, absolutely crucial for transaction-intensive applications like yours. Having dealt with multiple international clients successfully, I understand the value of clear communication and reliable support - qualities I extend to all my clients. A testament to my proficiency is the successful completion of over 70 projects with a stellar rating of 4.9. These projects have equipped me with a refined sense of applying my skills in alignment with varied business logics - skills that will be put to good use for your startup's mobile application development in Flutter. So let's combine our skills and create an application that not only satisfies your business's needs but also excels in performance, stability, and security.

@nicolasalexandro

I can design and implement a robust backend in Java Spring Boot with MongoDB tailored to your Flutter mobile application, covering the 25–30 APIs you need. My focus will be on clean architecture, secure endpoints, and smooth integration with your mobile team’s workflow. I have hands-on experience building RESTful APIs for startups, including authentication flows, role-based access, and scalable data models on MongoDB. I’m comfortable translating product requirements into efficient endpoints and collaborating closely with frontend/mobile developers. My approach would start with clarifying your data models and API contracts, then implementing modular Spring Boot services, proper error handling, and environment-based configurations. I’ll also provide basic documentation and Postman collections for your team. I would love to chat more about your project! Regards

@mariamz24

Hi, We would like to grab this opportunity and will work till you get 100% satisfied with our work. We are an expert team which have many years of experience on Java, J2EE, Software Architecture, Backend Development, RESTful API, MongoDB, API Development, Spring Boot Lets connect in chat so that We discuss further. Regards

@bhartimalu

Hello, I can work as a freelance backend developer using Java Spring Boot, building and maintaining scalable APIs, handling database integration, and ensuring secure, high-performance systems. I have experience with REST APIs, authentication, and clean architecture, and can support ongoing development or enhancements efficiently. Regards, Bharti

@monicasynthesis

Hello ✋, I’ve gone through your job description and understand that you need a Backend Developer to build 25–30 RESTful APIs for your Flutter app, covering user management, product catalogs, and transaction processing. With 5+ years of experience in Java Spring Boot and MongoDB, I’ve delivered secure, efficient, and well-documented API layers for mobile applications. What I can help you with: • Develop RESTful APIs with full CRUD functionality • Database management and optimized queries in MongoDB • Clean, secure, and documented code delivered within a 15-day sprint Warm regards, Monica Bhatia

@nikhilroyjs

Hi there! I'm truly excited by the opportunity to develop the 25-30 core APIs for your new Flutter mobile application. I understand the need for robust user management, product catalogs, and transaction processing, all within a rapid 15-day sprint. My extensive experience crafting scalable RESTful APIs, implementing full CRUD functionality, and ensuring secure, efficient data handling aligns perfectly with your requirements. While your project specifies Java Spring Boot and MongoDB, my strong background in backend development with Django and Firebase gives me a deep understanding of architectural principles, allowing me to quickly adapt and deliver high-quality solutions in new environments. I'm confident I can build the clean, documented code you need to power your app. Let's discuss how I can bring this project to life efficiently. Regards, Nikhil Chandra Roy

@tamannarajput18

Hi, I’m Tamanna. I can develop 25–30 robust and scalable APIs using Java Spring Boot with MongoDB, ensuring clean architecture and high performance. I’ll design RESTful endpoints with proper validation, authentication (JWT/OAuth), and structured data models. The APIs will be secure, well-documented, and optimized for speed and scalability. I’ll also implement error handling, logging, and testing to ensure reliability. If needed, I can assist with deployment and integration with frontend or third-party services. My focus will be on delivering maintainable and production-ready APIs that align perfectly with your business logic and future scalability requirements.

@himanshus642

With 5+ years of experience as a full-stack developer, I've designed and built scalable, secure, and automation-driven applications, making me well-suited for your project. While I possess a diversified technical skill set ranging from Java Spring Boot to AI and Automation, my proficiency with MongoDB as your described testament matches the task at hand remarkably. In fact, my recent projects have involved similar requirements and received glowing client feedback. In the realm of backend development specifically, I've been actively engaged in building RESTful APIs for quite some time now - be it User management or Transaction processing functionalities like what you're seeking. My experience also extends to building CRUD functionality for maximum data control and manipulation. With me on board, you can rest assured about the quality and robustness of your end product.

@jasrajkaur77

Hey, I've read your project description carefully and clearly understand your requirements. I have 5+ years of experience in backend development using Java Spring Boot, REST APIs, and MongoDB. • Developed scalable RESTful APIs with full CRUD for user, product, and transaction systems • Ensured secure data handling, optimized queries, and clean, well-documented code • Delivered projects within tight sprints with structured API architecture and performance focus I can build your 25–30 APIs efficiently within the 15-day timeline as per your PRD. Relevant portfolio samples are available. Regards, Jasraj Kaur

@AyushiJAIN1907

Hello — I’m an experienced backend developer with strong Spring Boot, microservices, Kafka, and MongoDB expertise. I’ll build the 25–30 RESTful APIs you need, delivering clean, documented code within a 15‑day sprint and ensuring secure, performant data handling for your Flutter mobile app. I have a profound understanding of java application using microservices architecture and working experience on restful APIs for CRUD operations. This project request aligns perfectly with my skill set.

@zacsin9

Hey — saw your post about needing a backend developer to build 25–30 APIs in Java Spring Boot with MongoDB for your Flutter app. With that many endpoints, the usual pain point is keeping the API contracts clean and consistent so your mobile team isn’t blocked or constantly refactoring. Quick question before I suggest an approach: Do you already have your API contracts (request/response models) defined, or do you want help designing them alongside the implementation? I’ve built REST APIs with Spring Boot and MongoDB for mobile apps before, including auth, user profiles, and complex data flows, so I’m comfortable structuring this in a way that’s easy for Flutter to consume. If you can share your current spec, screens, or any existing docs, I’ll review them and tell you what’s realistic for these 25–30 APIs in terms of structure and timeline.

@indreshpnk

Hello, I understand you need a skilled Backend Developer to build 25-30 APIs for your Flutter mobile application. The goal is to deliver a robust, secure, and efficient API layer that aligns perfectly with your PRD. Here’s what I can provide: Develop RESTful APIs for User Management, Product Catalogs, and Transaction Processing with full CRUD functionality. Implement MongoDB database management ensuring optimized queries and secure data handling. Deliver clean, well-documented code within your 15-day sprint, maintaining scalability and performance. I bring over 4+ years of experience in Java Spring Boot and MongoDB, with a strong focus on building reliable, scalable, and maintainable backend systems. Over the years, I’ve worked on startup and enterprise projects, always prioritizing performance, usability, and code quality. Just to clarify a few things: Are there any authentication/authorization standards (e.g., JWT, OAuth) already planned for these APIs? Should I include logging, error handling, and versioning for all endpoints? Please come to the chat box to discuss more about your project. Best regards, Indresh Kushwaha

@KuldeepGaur1

Hands on with writing the spring boot microservices and handling data at scale. I will be able to deliver the project on time.