Full-Stack Java back and Front Development help

@tangramua

Dear ,   We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time.   We are 25 years in this business and our technical specialists have strong experience in Java, Python, Node.js, React.js, Frontend Development, RESTful API, Angular, API Development, Microservices, Spring Boot and other technologies relevant to your project.   Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews.   Please contact us via Freelancer Chat to discuss your project in details.    Best regards, Sales department Tangram Canada Inc.     

@rohitpatidar001

As a seasoned developer with over 9 years of experience in Java and J2EE technologies, I confidently offer my expertise to help you roll out this new feature. The familiarity I have with Spring Boot-based microservices and RESTful APIs not only assures accurate extension or creation of related endpoints, but also conscientious integration with Apache Kafka to facilitate seamless events exchange. My track record of maintaining clean architecture and ensuring scalability for diverse platforms underlines my commitment to producing high-quality code. Furthermore, my hands-on understanding with Angular and React, which we'll need for the dashboard and SPA respectively; will expedite the task as it favors better comprehension of the older Angular module and the newer React interface. The ability to lead and work within a team shown repeatedly during my experience as Lead Developer syncs perfectly with your requirement to integrate seamlessly into an existing team and codebase. This skill ensures that codes remain idiomatic, unit-tested, and pushed regularly to our shared Git repo via pull requests; benchmark behaviors that not only translate into a complete feature but also make debugging significantly easier. I am well-versed in working across stacks, especially in scenarios similar to what you have described with Spring Boot, Angular, React, and Kafka.

@corpmember29

I DELIVER END-TO-END CROSS-STACK FEATURES THAT WORK CLEANLY ACROSS MICROSERVICES, FRONTEND FRAMEWORKS, AND EVENT-DRIVEN SYSTEMS. With 12+ years in IT, I specialize in Java (Spring Boot), microservices, Kafka-based event systems, and modern frontend stacks like Angular and React, building scalable production-grade features. I have experience delivering full-stack integrations across distributed systems, ensuring smooth communication between backend services and multiple frontend applications. Approach Requirement analysis → service design → API & Kafka integration → frontend updates → testing → CI validation Core Work Spring Boot endpoint creation & extension Kafka producer/consumer integration with schema compliance Angular module updates + React SPA feature integration Cross-service data flow alignment Unit & integration testing (CI-ready) Acceptance Focus Clean Kafka topic flow with correct schema Fully working APIs with test coverage Angular + React UI sync without errors Figma-aligned UI implementation Why Me 12+ years enterprise experience Strong microservices + event-driven architecture expertise Proven ability to work across Java, Node, Python, Angular, React Deliverables Production-ready feature implementation Clean, tested code with PRs Short setup documentation Ready to integrate this feature smoothly into your existing ecosystem.

@kamran2012

Good to see this project, I will build the full feature — Spring Boot endpoints with Kafka producers/consumers, Angular dashboard updates, and React SPA components — all wired together and unit-tested per your CI requirements. For Kafka, I will define Avro schemas upfront so both Java and Node.js/Python consumers validate messages consistently, preventing silent deserialization failures as the feature evolves. Questions: 1) Is the Kafka cluster managed (Confluent) or self-hosted? 2) Do Angular and React share any state or API client layer? Looking forward to your response. Best regards, Kamran

@vishal1145

Your Kafka schema versioning will break the moment your Angular module and React SPA consume events at different speeds. If one service processes v2 messages while the other expects v1, you'll see silent data corruption that won't surface until production. Before I map out the integration, I need clarity on two things: What's your current Kafka consumer group strategy—are Angular and React polling the same topics or do you have separate event streams? And what happens when a Spring Boot service publishes an event but the Node.js layer hasn't processed the previous batch yet—do you have dead-letter queues configured or will messages just pile up? Here's the architectural approach: - SPRING BOOT + KAFKA: Implement schema registry with Avro serialization so all services validate message contracts before publishing. Add idempotency keys to prevent duplicate processing when consumers retry failed events. - ANGULAR + REACT INTEGRATION: Build a shared TypeScript event adapter that normalizes Kafka messages into a common interface both frameworks consume. This prevents you from maintaining two separate data transformation layers. - MICROSERVICES ORCHESTRATION: Set up distributed tracing with correlation IDs across Java, Node.js and Python services so you can debug cross-service failures in under 5 minutes instead of hunting through logs. - CI/CD PIPELINE: Configure contract testing between producer and consumer services—your build fails if Spring Boot publishes a schema change that breaks downstream Angular components. I've built 8 polyglot systems where Java, Node and React had to stay in sync through event streams. The ones that scaled past 100K events per day all had schema validation and consumer lag monitoring from day one. Let's schedule a 15-minute call to walk through your current Kafka topic structure before I start coding—I don't build features that create tech debt.

@taimoorkhan311

Hello, With 4 years of experience in Full-Stack Development, including expertise in Java, Python, Node.js, React.js, Angular, and Spring Boot, I am well-equipped to handle your project requirements. I have carefully reviewed your project description and understand the need for seamless integration between the Java backend and the Angular/React frontend components, ensuring clean code and efficient communication through Kafka. I am confident in my ability to deliver a high-quality solution that meets your acceptance criteria. I am open to discussing further details and collaborating closely to ensure the successful completion of this project. Let's connect in chat to discuss the project in more detail. Best regards, Taimoor from Pixels Soft

@ParasTech7

I have 21 years of experince, Principal Software engineer at Microsoft, I have extensive experince with data spring boot, JPA, Java 17 and 21, data integration, API development and development microservices, well versed with sql based databases . I can do your work efficiently.

@juanjosec63

Hi, I have strong experience in Java 21, Spring Boot microservices, Kafka, Node.js, Python, Angular, and React.js for building and shipping cross-stack features across backend services and mixed frontend environments. For this project, I’d implement the feature end-to-end by extending the Spring Boot services and Kafka event flow, then update both the Angular dashboard and React interface so the data, behavior, and user experience stay fully aligned across the stack. I’ve worked on similar feature deliveries where backend APIs, event-driven services, and multiple frontend layers had to move together cleanly, with proper PR workflow, unit testing, CI stability, and clear setup documentation. You can expect clear communication, fast turnaround, and a high-quality result that fits seamlessly into your existing workflow. Best regards, Juan

@salesapple

Dear Client, I’d love to assist with implementing your cross-stack feature across backend and frontend systems. With 8+ years of full-stack development experience, I have strong hands-on expertise in Java 21, Spring Boot microservices, Kafka, Node.js/Python integrations, Angular, and React, and have delivered similar end-to-end features spanning multiple services and UI layers. I can design and implement the complete feature cleanly across your stack—extending Spring Boot APIs, handling Kafka publish/consume workflows, updating both Angular and React interfaces, and ensuring everything is fully tested, documented, and delivered through structured Git pull requests. I focus on writing scalable, maintainable code and can collaborate closely via Slack with daily updates to keep progress transparent and aligned with your expectations. Best Regards.

@CANWS

Hello, I have hands-on experience delivering features across complex stacks involving Spring Boot microservices, Kafka messaging, and hybrid Angular/React frontends. I can take ownership of this feature from backend implementation to frontend delivery. I’ll extend the required APIs, handle Kafka producers/consumers with the correct schema, update both UI layers to match Figma, and ensure everything is fully tested and merged through clean pull requests. My work focuses on maintainable code, smooth integration, and reliable CI-ready delivery. Please share the feature requirements and repository structure so I can review and begin.

@AlexDeveloper911

Hey, I can start now. ✅ I’ve worked on something very similar. What really matters here is seamlessly integrating a new feature across different technologies. The tricky part is usually ensuring smooth communication between Java Spring Boot, Node.js, Python, Angular, React, and Kafka. I recently worked on a project involving Java Spring Boot microservices and React components, ensuring efficient data exchange. While I haven't specifically worked on this exact stack, I have experience with similar tech combinations and understand the importance of clean code and thorough testing. Let's chat more details. -Alex

@ami58abf92fbb39b

With over 8 years of experience, I have honed my skills in both frontend and backend development, specializing in technologies such as Node.js and React.js. For your project, my extensive familiarity with these stacks and libraries such as Spring Boot make me an ideal fit. I have a cross-stack development experience which is manifested in my proficiency in ensuring smooth interactions between multiple frameworks, systems, and databases. Rest assured, your feature design and implementation will be robust, scalable and seamless within the Angular and React interfaces. My commitment to unit-testing and code quality means not only will acceptance criteria be met, but your project as a whole will be future-ready. I can develop readable code that follows best practices while ensuring it's properly backed up through Git repositories. Moreover, I promise clear, responsive communication through Slack that keeps you informed on daily progress. I'm also adept at meeting deadlines while maintaining high-quality work. This dedication to delivering excellence coupled with my passion for bringing vision to life will guarantee a successful project outcome for you"

@ThinhSenDev

⌛ Hi, we can start immediately⌛. I have 6 years experience with Java & Angular/React in banking & telecom, your technical you need very similar for me, there are what I can do for your task: 1. Create new API in Spring Boot (make sure API will be described and easy to maintain), integration with Kafka topic (consumer/producer). Use exactly desgin pattern to clean and maintainable. 2. Update dashboard with Angular/React integration with backend. 3. Create unit test following business logic and make sure application pass all of test after create something new. 4. Easy understand README for setup new/update application for new env. If you think it useful for you, pls connect with me now, I currentlly find a long term job, so we can go far from this, thank you !

@rbtech1984

Hi There!!! ★★★★ ( Cross-stack feature development across Spring Boot, Kafka, Angular & React ) ★★★★ Project understanding: I understand you need a full-stack developer to build a new feature spanning Java 21 Spring Boot microservices, Kafka messaging layer, and frontend updates in both Angular and React. It must be fully tested, CI-ready, and aligned with Figma specs. Services: ⚜ Spring Boot API development & enhancements ⚜ Kafka producer/consumer integration ⚜ Microservices communication handling ⚜ Angular dashboard updates ⚜ React SPA feature implementation ⚜ Unit testing + CI pipeline support ⚜ Clean Git PR-based workflow Qualifications & experience: 7+ years in full-stack development with Spring Boot, Kafka-based event systems, Angular and React apps, and REST API driven architectures in production environments. Approach: I will first map service dependencies, implement backend Kafka flows, then update APIs and finally sync Angular + React UIs with proper testing and schema validation. Closing: available to collaborate on Slack and start immediately, happy to discuss the feature details further. Warm Regards, Farhin B.

@krisk63

Hi, this is Kris based in McKinney, Texas. I’ve reviewed your project and understand you need a cross-stack feature implemented end-to-end—extending Spring Boot services with Kafka integration and wiring the new functionality cleanly into both Angular and React frontends, with solid test coverage and CI alignment. My approach would be to define the event flow and API contracts first, implement the backend changes with proper Kafka producers/consumers, and then update both UI layers to consume and present the data consistently, backed by unit and integration tests. A few additional questions: Q1: Do you already have a defined Kafka schema (Avro/JSON Schema), or should that be introduced? Q2: Is the Angular module being phased out, or should both frontends remain fully supported long-term? Q3: Any preferred testing frameworks or CI constraints I should align with? Regards, Kris

@adisonw

Dear Sir, I am thrilled to bid your project. Your feature is a strong fit for me because this is exactly the kind of cross-stack work where clean coordination matters more than isolated coding, especially when Spring Boot, Kafka, Angular, React, and supporting Node or Python services all need to move together without friction. I have solid experience building full-stack features across mixed architectures, including API design, event-driven integrations, frontend updates in existing codebases, test coverage, and structured delivery through pull requests. For this project, I would approach it by mapping the full feature flow first, then extending the Spring Boot services and Kafka messaging cleanly, validating schema and topic behavior, and updating both the Angular and React surfaces so the user experience remains consistent despite the split frontend stack. I also understand the importance of fitting into an existing engineering workflow, so I would keep the code idiomatic, tested, review-friendly, and documented with clear setup notes and any new environment variables. One important question I’d like to ask is this: is there already a shared contract or schema registry for the Kafka messages, or will defining the event shape for this feature be part of the implementation work as well? Sincerely, Adison.

@johnedwardl

Hi, I’ll design and implement the new feature across your stack, ensuring seamless integration between your Spring Boot services, Kafka, Angular, and React components. With extensive experience in similar cross-stack projects, I’ll extend or create the necessary Spring Boot endpoints, ensuring proper Kafka message handling while maintaining idiomatic code standards. I’ll ensure that the Angular dashboard and React SPA reflect the new functionality without any disruptions, focusing on a smooth user experience. My approach will include comprehensive unit testing and adherence to your CI pipeline requirements, ensuring all tests pass before deployment. To ensure alignment with your design specifications, I will reference the provided Figma designs closely. I’ll also prepare a succinct README to guide setup and highlight any new environment variables. Could you share any specific timelines or additional requirements you have in mind? I’m ready to start immediately and can keep communication open on Slack for any quick clarifications. Thank you.

@HemantManglani01

Hi there, I'm Hemant, a professional full-stack developer with extensive experience in wiring complex features across diverse tech environments. My background heavily involves Java 21/Spring Boot microservices, Kafka integration, and both Angular and React frontend development. Your project, with its blend of Spring Boot backend, Kafka events, and a dual Angular/React UI, is precisely the kind of challenge I excel at. I'm confident I can design and code this new feature, ensuring it integrates seamlessly across all services and UI surfaces, with idiomatic, well-tested code that meets your acceptance criteria. I'd love to chat more about your specific requirements and discuss how I can help bring this feature to life efficiently. Best, Hemant

@rishi9343

With over 8 years of experience in full-stack development, your project is right up my alley. I've got an extensive background handling every aspect of the stack your project deals with: from Spring Boot and Node.js/Python layer to Angular and React front-ends. You'll have the unique opportunity to work with someone well-versed in both mobile and web technologies - Java, Node.js, Python, React.js. During my career, I've always emphasized clean coding practices, including detailed comments and thorough documentation. I also put special importance on writing comprehensive unit-tests to ensure quality and avoid run-time errors. This way, I guarantee that all API tests will pass during CI testing and we'll have coverage for potential failure modes. Lastly, having used Kafka for event-driven architecture numerous times, I am confident in my ability to connect your Spring Boot API layers via the right Kafka topics. My extensive skillset (which includes experience with databases such as MySQL, PostgreSQL and MongoDB) means I offer more than just impressive technical capabilities; it also guarantees a smoother overall project flow. With daily updates on progress via Slack and a commitment to delivering projects that not only conform to your specifications but exceed your expectations - let's start creating something great together!