React & Spring Boot Developer (INDIAN RESIDENCE ONLY)

@crtvecode

When a project requires both new builds and upgrades to existing systems, the real challenge often lie in maintaining a coherent integration between the two. To address potential concerns about data lost or downtime during this transition, I will work in a way that keeps your live systems intact throughout the process. Planning phases: Initial assessment: Review existing systems and gather requirements for new modules. Safe staging build: Develop new features in a private staging environment first. Incremental updates: Implement changes to legacy screens and APIs without disrupting live operations. Final deployment: Transition the updates to production smoothly after thorough testing. Could you clarify if there are specific legacy systems that require immedate attention? Rajavel

@rohitpatidar001

Hi, I’m interested in your long-term React & Spring Boot Developer opportunity. I’m an India-based software developer with 11+ years of professional experience in Java/J2EE, Spring Boot, React, TypeScript, REST APIs, databases, and full-stack enterprise applications. Relevant experience: *Backend: Java, J2EE, Spring Boot, Spring MVC, Spring Data JPA, Hibernate, Spring Security, REST APIs *Frontend: React, TypeScript, JavaScript, reusable components, API integration and responsive UI *Database: PostgreSQL, MySQL, MongoDB, database design and query optimization *Development: Greenfield modules, existing/legacy code enhancement, debugging, refactoring and API/database changes *Testing: JUnit, Mockito and API testing * **DevOps:** Docker, Git, CI/CD, AWS/Azure * **Desktop:** JavaFX hands-on experience * **AI:** I use AI/LLM tools during development for code analysis, implementation assistance, debugging, test generation, documentation and productivity, with proper review and validation of the generated code. I’m comfortable working across both new development and existing Java/React codebases, and I’m particularly interested in a long-term remote part-time engagement. * Experience: 11+ years * Location: India * Primary stack: Java + Spring Boot + React + TypeScript * Availability: Part-time / Flexible / Long-term * Start: Immediately I’d be happy to discuss your current codebase, expected weekly hours, upcoming modules, and the long-term engagement.

@ashokdzpxq

Hi , I am parttime Senior Java/Spring Boot engineer with 18+ years of experience designing and modernizing backend systems for fintech, enterprise, and SaaS products. I help teams build scalable microservices, optimize performance, and migrate legacy systems to cloud‑native architectures on AWS. Recent work includes a multi‑tenant lending platform, a test‑management SaaS, and a legal‑tech case management system with RAG‑based search. I combine deep backend expertise with modern AI tooling to deliver smarter, more efficient applications and faster development cycles. Core strengths Backend & Cloud: Java, Spring Boot, Spring Security, Spring Cloud, Microservices, REST APIs, AWS (ECS Fargate, EC2, S3, RDS, ALB), Docker, CI/CD Databases & Performance: PostgreSQL, MySQL, Oracle, SQL tuning, Redis caching, query optimization

@Tacticssoft

Hello, I am a Full-Stack Software Developer with 9 years of overall software development experience. I have experience developing web applications, building APIs, and maintaining existing codebases. I can contribute to green-field development and improve legacy features, database mappings, and backend services. I am familiar with modern development workflows and AI-assisted coding tools to improve productivity. I am interested in a long-term, remote, part-time contract with flexible working hours. I can collaborate with your team, understand existing code, troubleshoot issues, and deliver maintainable solutions. I am comfortable learning project-specific technologies and adapting to your development standards. I can share my detailed CV, relevant project experience, and availability for an initial discussion. I look forward to discussing how I can contribute to your team for the long term.

@Govind2892590

Hi, With over 10+ years of experience as a full stack developer, I am confident in my ability to deliver high-quality solutions tailored to your needs. I assure you that my dedication and hard work will make up for the lack of reviews. I have a proven track record of successfully completing projects and consistently receiving positive feedback from clients. I have carefully read your job description and understand the requirements. I Additionally, I will create a comprehensive statistics view for the uploaded files, providing you with valuable insights and easy access to the data. My goal is to ensure that the project is completed to your 100% satisfaction. I am committed to discussing the clear requirements with you before starting the project and am ready to begin immediately upon assignment. I am eager to demonstrate my capabilities and look forward to the opportunity to work with you. Thank you for considering my proposal. Regards Goku

@matthewr254

Hi, Incremental upgrades to a mixed Spring Boot + React TypeScript codebase often break API contracts, database mappings, or CI pipelines; the biggest risk is shipping quick front-end changes without synchronized backend API versioning and tests. I focus first on protecting contracts and data mappings to avoid regressions while delivering new modules. I have led multiple green-field builds and legacy modernizations combining Java Spring Boot back-ends and React with TypeScript front-ends, implementing API versioning, transactional DB migration strategies, and comprehensive integration tests. I regularly use Ai tools (Copilot-style completion, LLM-assisted unit test generation, embedding-based code search) to accelerate feature delivery and reduce review cycles. My work includes creating new modules from scratch, refactoring legacy screens incrementally, and stabilizing API and DB mappings under tight schedules. I will start with a quick audit of the back-end APIs, database mappings, and front-end API usage to identify contract mismatches and high-risk areas, then propose a minimal set of fixes and tests to prevent regressions before adding new modules. - please send Biodata with details I will provide a detailed Biodata on reply covering relevant project summaries, technical stack depth (Spring Boot, JPA/Hibernate, React + TypeScript), Ai tools used, availability, and confirmation of INDIAN RESIDENCE ONLY requirement. - Do you have an existing prioritized backlog or shall I create a technical-risk-first list after the audit? - What are the expected weekly hours and overlap window for synchronous coordination? Happy to hop on a brief call whenever it suits you. Matthew Reese

@FreeLancers360

As a Full Stack Developer and AI enthusiast, I believe I can bring substantial value to your React and Spring Boot project. Over the past years, I have accumulated extensive experience in Java Spring Boot back-end and React front-end technologies - exactly what you're looking for. I have successfully employed my skills to create both green-field builds and to upgrade existing codebases with efficiency and quality. Moreover, my versatility across the full stack comes in handy when it comes to dealing with legacy screens, APIs, and database mappings to bring about incremental improvements - making sure your project gets the dedicated attention it needs. Additionally, with my understanding of AI-Powered Solutions, I can help implement any AI aspects that may arise during development. Regularly working within overlapping hours of various global time zones (including US, UK, and Australian business hours), I am fully capable of ensuring effective remote work for your IT company throughout this long-term contract. Apart from these technical abilities, my dedication towards delivering secure, scalable, high-performance applications with a focus on clean architecture and intuitive user experiences aligns perfectly with your requirements. Don't miss out on benefiting from this essential alignment; select me for an impactful partnership!

@UzeeTech

A long-term part-time contract covering both green-field builds and steady upgrades to your existing Spring Boot backend and React TypeScript frontend is exactly the kind of work I enjoy. What matters most here is versatility: new modules must sit cleanly on top of legacy screens, APIs and database mappings without breaking what already works. I would start by getting oriented in your codebase and database mappings, then ship the first new module end to end, with a React TypeScript UI wired against your Spring Boot APIs. After that I would alternate legacy screen and API improvements with fresh module builds, keeping each change small and reviewable so a part-time cadence stays productive. I have built B2B platforms and e-commerce/marketplace systems end to end, including full API and frontend work, which maps directly onto the green-field plus upgrade mix you describe. Two questions: what does the current stack look like, build tooling, database, and how the React app talks to the Spring Boot APIs? And is the part-time schedule fixed weekly hours or milestone-based blocks? Happy to start with a short trial module so you can judge fit before committing long term.

@DeMit19

Hello, I worked on a similar Java Spring Boot + React TypeScript platform where API response time improved from 2.4s to 700ms and recurring production issues dropped from 15 to 3 per month. I can support both new module development and ongoing upgrades across your Spring Boot backend, React TypeScript frontend, APIs, and database mappings. I’m comfortable working part-time on a long-term contract and using AI tools to speed up coding, testing, debugging, and documentation without sacrificing code quality. My focus will be clean delivery, stable releases, and consistent progress across both legacy and green-field work. I can also provide my full biodata and technical background for review. Thanks, Dejan

@MuhammadAsad108

✔ I deliver 100% work — 99.9% is not for me. ✔ Workflow Diagram Existing Code Review ⟶⟶ Spring Boot APIs ⟶⟶ Database/JPA Layer ⟶⟶ React TypeScript UI ⟶⟶ New Modules ⟶⟶ Legacy Improvements ⟶⟶ Testing ⟶⟶ PR/Review ⟶⟶ Continuous Delivery Key Highlights ✔ Comfortable working across both green-field modules and established production code without unnecessary rewrites. ✔ Front-end work includes React, TypeScript, reusable components, API integration, state management, responsive UI and debugging existing screens. ✔ Backend approach focuses on clean REST APIs, service/repository separation, authentication/authorization, database mappings, validation, exception handling and maintainable modular architecture. ✔ I can work through existing bugs and technical debt incrementally while keeping backward compatibility and regression risk under control. ✔ Git-based development, clean commits, code reviews, testing and clear technical documentation will be maintained throughout the engagement. I’m interested in the long-term 2+ year association and am comfortable with flexible, remote, part-time collaboration. I can provide my detailed biodata/CV covering technical skills, project responsibilities and availability for your review. Best Regards, Asad Full-Stack Development | React/TypeScript | Backend & API Development

@NEHABHAT92

From my 9+ years of experience in web development and mobile development, I am adept at tackling projects that require versatility across the full stack, much like this one. I have rich experience in Java, Python, PHP, Html/CSS/Javascript, as well as with React and Spring Boot. In fact, these are two of my core strengths! My proficiency lies not just in working with these technologies individually, but also effectively integrating them to create efficient and powerful applications. My dedication doesn't end with the delivery of the project; rather it's just the beginning. Upon completion of my work, I offer a free support period of three months where I am readily available to resolve any issues and assist you further. This is a testament to my commitment towards providing good quality work even after the project has been concluded. When you choose me for the job, you not only get a competent developer but also a reliable strategic partner who can turn your "ideas into reality." You can trust me to work diligently even in remote setup, meeting every deadline successfully. I believe it's crucial for us to have a clear understanding of each other's expectations and goals, so please let me know if there's anything specific that you would want me to focus on. Thank you for considering me for this opportunity - I eagerly look forward to collaborating with you!

@richard031596

You need an experienced part-time full-stack developer who can maintain existing Java Spring Boot + React TypeScript systems while also building new modules from scratch over a long-term engagement. I can work across both sides of the stack: Java/Spring Boot for APIs, business logic and database mappings, and React/TypeScript for new screens and incremental improvements to legacy UI. I’m comfortable working within an existing codebase, tracing dependencies before changes, maintaining API contracts, and delivering new functionality without disrupting established modules. My matching stack includes Java, Spring Boot, React, TypeScript, JavaScript, REST APIs, PostgreSQL, authentication, integrations and production-oriented development. I’m available for flexible remote part-time work and can adapt to an existing Git/code-review workflow. Could you share the current backend/frontend architecture and expected weekly hours so I can align my availability?

@anshumanvermaUK

Hi I’m based in India and interested in a long-term part-time engagement working across React/TypeScript and Java backend systems, including new development and improvements to existing codebases. I have hands-on experience with React, Java/Java EE, REST APIs, Hibernate/SQL and enterprise application maintenance, along with practical AI-assisted development and AI integrations. Thanks Anshuman

@Nikhilch30

Hi, I have 6+ years of full-stack development experience and am interested in the long-term part-time remote contract. I can work across: * Java Spring Boot backend development * React + TypeScript frontend * REST APIs and database integration * New module development from scratch * Existing codebase upgrades and refactoring * Legacy API, UI and database mapping improvements * Bug fixing, testing and performance optimization * Git-based development and clean code practices * AI-assisted development using modern AI coding tools to improve productivity and code quality I’m comfortable working independently with flexible hours and can adapt to your existing architecture, coding standards and development workflow. I’m looking for a long-term engagement and can provide my detailed profile/Biodata as requir

@novatech2210

Hey, Just wrapped up a green‑field React/TypeScript + Spring Boot app for a fintech client, delivering a clean API layer, JPA mappings, and a dynamic dashboard—all without data duplication. We’re the perfect fit for your full‑stack upgrade. I specialize in building scalable React interfaces with advanced hooks, TypeScript, and Redux, while crafting robust Spring Boot back‑ends, RESTful APIs, and incremental database migrations. Multiple 5‑star reviews on full‑stack projects and legacy refactors attest to my track record. Happy to jump on a quick call—worst case, you’ll get a free consultation and some solid ideas. Chris | Lead Developer | Novatech

@Chandramouli1m

Hi! Full-stack engineering across React (TypeScript) and Java Spring Boot, combined with daily AI-accelerated workflows (Cursor, LLM code assistants), matches my technical background. Technical Fit & Core Capabilities: • React (TypeScript): Clean functional components, hooks, state management (Redux/Zustand), Tailwind/MUI, type-safe API consumers, and upgrading legacy React screens to modern patterns. • Java & Spring Boot: RESTful microservices and monolith architecture, Spring Security (JWT/OAuth2), JPA / Hibernate entity mappings, database migrations (Flyway/Liquibase), and transactional business logic. • AI-Assisted Acceleration: Daily experience leveraging AI developer tools (Cursor AI, Copilot, prompting for test generation, refactoring legacy codebases, and API documentation) to boost throughput 2-3x while maintaining strict manual code quality reviews. • Contract Availability: Flexible part-time availability for long-term collaboration (2+ year horizon), based in India, with clear asynchronous and synchronous communication. Summary Bio-Data: • Role: Full-Stack Engineer / Backend & Frontend Developer • Location: India (Resident) • Primary Stack: React.js, TypeScript, Java / Spring Boot, REST APIs, PostgreSQL / MySQL, Git • Experience: 2+ years across production web application architecture, legacy refactoring, and AI-assisted engineering. Bid: ₹10,000 INR | Available immediately for an introductory technical sync!

@bcosley

Hi, You're looking for a long-term React and Spring Boot developer to handle both green-field work and upgrades across the stack, with remote, part-time engagement. I understand the need to move fluidly between frontend TS and backend Java, while keeping production risk in check. Recent full-stack work involved integrating React TypeScript front-ends with Spring Boot services, focusing on incremental improvements with clear rollout steps. I'd start by validating the current flows, isolating unstable parts, and setting up a quick test and rollout plan for backend and frontend changes. Then I'd ship in small increments with clear validation against real usage. Coordinating progress between legacy screens and new modules while preserving API compatibility. What should happen if a legacy screen returns inconsistent data during a live upgrade? Who owns data migrations and rollback plans if API contracts drift during incremental changes? If we're aligned, I'd be happy to walk you through the implementation plan before we get started. Best regards, Brandon

@RetrixDev

Hey Sir, I am expert at Spring Boot, Java & Typescript and you can confirm that from existing projects on my profile & reviews. I can handle full stack development for your new modules and improvements to your existing application. I'll follow your codebase conventions closely and keep you informed as the work progresses. The work would be done professionally within mentioned timeframe. Lets get in touch & discuss more about it. Thank you.

@milanrathod945

Legacy screens and new modules fall apart when the React front end and the API drift apart, so I'd fix the screen-to-API-to-database chain together and build new modules on typed contracts. - I build React TypeScript screens end to end, from forms and tables to the REST API calls and SQL behind them. - For your old screens, I'd improve them step by step: fix slow queries, clean up database mappings, and tidy the API responses. - For new modules, I'd start from a clear data model and typed API contract so the front end and back end line up from day one. - On Day 1 I can build one working React TypeScript screen wired to a live API call, so you can judge my work that same day. Could you share repo access and one legacy screen you'd like improved first, so I can start right away?