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I’m looking to bring an experienced full-stack engineer on board to drive both our web and mobile initiatives. The server side of the platform is written in Java 17, while the client side for our mobile offering relies on React Native. You will be hands-on across the stack, shaping new functionality as well as keeping our existing code robust and performant. Below is a concise view of the core expectations (the full job description is attached for deeper detail). • Developing new features that span Java 17 services through to React Native interfaces • Maintaining and refactoring the existing codebase for stability, scalability and speed • Providing technical leadership and mentoring to mid-level and junior developers You’ll collaborate closely with product and design, guide best practices, review pull requests, and help define our long-term technical roadmap. If you thrive on end-to-end ownership and can demonstrate solid results with Java 17 and React Native in production, let’s talk. If you meet all the conditions only then make the bidding. This role is for exact 30-35 days, no one makes bidding for less number of days.
Project ID: 40670565
35 proposals
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Active 5 days ago
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35 freelancers are bidding on average ₹25,070 INR for this job

I will start by auditing the current Java 17 services and React Native modules to pinpoint performance and scalability gaps. Then I’ll refactor critical paths, add new features, and mentor the team. I’ll set up CI/CD pipelines and enforce code‑review standards. I can deliver a stable, high‑performance stack in 30‑35 days. How many existing modules need immediate refactoring, and what is the current CI/CD setup?
₹33,330 INR in 35 days
8.4
8.4

Hi, As an established Web & Mobile App Development Company with 19+ years of experience, IT Flex Solutions India has a proven track record in creating robust, scalable and high-performing digital solutions which make us the perfect match for your Senior Java17 & React Native Developer role. Having completed 483+ successful projects, our 40+ strong team of skilled developers and designers are well-versed in end-to-end ownership of exactly the kind of initiatives you describe. Our technology proficiency includes HTML5 & CSS3, JavaScript (including React.js), Node JS, PHP & Laravel and Python Development to name a few; all key languages for effective development using Java 17 and React Native. Moreover, we have extensive expertise in building mobile apps using frameworks like React Native that perfectly dovetails with your project requirements. Aside from simply delivering applications, our approach emphasizes collaboration, mentoring and leading by example. We foster a culture of best practices which aligns with your needs for guiding the technical roadmap, reviewing pull requests and imparting technical leadership to your junior staff. Choose IT Flex Solutions India and let's make your digital solution a business success together! Thanks, SBM
₹30,000 INR in 7 days
7.9
7.9

Hi, I’m interested in this role and can commit to the required 30–35 day engagement. I can work across your Java 17 backend and React Native mobile application, handling new feature development, performance improvements, refactoring, debugging, code reviews, and technical guidance for the team. I’m comfortable taking end-to-end ownership and collaborating closely with product and design to deliver stable, scalable solutions. Available to start immediately Best regards RAHEEL
₹25,000 INR in 7 days
6.7
6.7

Hello, I understand the need for an experienced full-stack engineer to drive your web and mobile initiatives. With over 10 years of experience in Java, JavaScript, React Native, and Full Stack Development, I am confident in my ability to meet your requirements. I have successfully developed new features spanning Java 17 services and React Native interfaces, as well as maintained and refactored existing codebases for stability and scalability. My portfolio includes similar projects where I provided technical leadership and mentoring to junior developers. My approach involves closely collaborating with product and design teams, guiding best practices, and defining long-term technical roadmaps. I am committed to delivering high-quality results efficiently. Let's discuss how I can contribute to your project further. Best regards,
₹25,000 INR in 7 days
6.1
6.1

Dear Client, I read "Senior Java17 & React Native Developer" carefully and understand you are looking for a full-stack developer who can handle both application development and AI integration. I have experience with Java, JavaScript, Mobile App Development, React.js, Web Development, Full Stack Development, Backend Development, React Native and can work across the complete stack — frontend, backend, APIs, databases, authentication, third-party integrations and AI features. I can build scalable applications using modern technologies while keeping the codebase maintainable and production-ready. A few quick questions: Which AI models/APIs are you currently planning to use? Is there an existing application/codebase, or will the project be built from scratch? Thanks & Regards, Deepak
₹24,375 INR in 14 days
5.6
5.6

As a seasoned full-stack developer, I believe my skillset perfectly aligns with your project's demands. My profound knowledge in Backend Development, JavaScript and Web Development combined with my extensive experience in Mobile App Development make me optimally suited to navigate your Java 17 and React Native tasks with ease and excellence. I am the specialist who transforms ideas into high-impact digital products that are efficient, reliable, and built for long-term business growth. Likely this is one area where you could truly benefit since your project calls for someone who can comfortably shape new functionality while maintaining existing code robustness and performance - this is what I do best. Furthermore, part of my approach is providing technical leadership and mentoring to junior team members. Thus, I can contribute effectively to your mandate of guiding best practices and help define long-term technical roadmaps while reviewing pull requests. Let’s collaborate closely to bring out the best in your platform!
₹12,500 INR in 5 days
4.8
4.8

Hello! I have experience building full-stack applications with Java backend services and React Native mobile applications. I have worked on scalable APIs, mobile features, database integrations, performance improvements, and maintaining production systems with clean architecture. I will first understand the existing codebase, improve stability where needed, then develop new features across Java 17 services and React Native interfaces. I can also help with code reviews, technical guidance, and best practices for the team. I have strong experience with Java, JavaScript, React, React Native, REST APIs, databases, and full-stack development. Timeline: 30-35 days I am available to start immediately and can fully commit to this project. I respect your technical direction and requirements, and I am interested in building a long-term working relationship by delivering reliable results. Thanks
₹25,000 INR in 30 days
5.0
5.0

As an experienced full-stack developer with a focus on Java 17 and React Native, I am confident that I possess both the technical capabilities and leadership skills required for your project. My expertise includes autonomy creation, voice assistance, robust back-end architecture construction, Task runners, scraping, knowledge pipelines, CRM synchronization, among others. All these become vital in handling the task at hand where your mobile solution derives heavily from React Native interfaces and the server side relies on Java 17 services. Throughout my 6+ years career, I have led teams in diverse sectors such as healthcare, real estate, e-commerce and SaaS projects. This exposure has sharpened my problem-solving ability to identify infrastructure challenges such as slow execution which hinders workflow. Hence, with your system having pre-existing codes that require maintenance and refactoring for stability, scalability and speed, you can rely on me to undertake thorough refactors while maintaining project effectiveness.
₹12,500 INR in 2 days
4.8
4.8

Hi there I can work on your Java 17 and React Native application and handle both backend and mobile development across the existing codebase My approach 1 Java 17 Backend Develop and maintain REST APIs business logic authentication and database integrations using Java 17 2 React Native Build and improve mobile screens components navigation state management and native functionality 3 API Integration Connect the React Native app with the Java backend and handle authentication data validation and error states 4 Database Work with the existing database structure optimize queries and implement required data changes 5 Bug Fixing Investigate frontend backend and integration issues and fix the root cause 6 Testing & Deployment Test the application across Android and iOS and support backend deployment and production releases I have worked with Java backend development React Native APIs databases authentication and full stack applications Quick questions to get started 1 Is this an existing Java 17 and React Native project 2 Which Java framework are you using such as Spring Boot 3 Which React Native version is currently used 4 What features or bugs need attention first 5 Do you already have the backend API and development environment set up Once I have these details I can review the existing codebase and start with the highest priority tasks Let me know and we can jump on a quick call to discuss the project Thanks
₹26,000 INR in 7 days
4.6
4.6

I can take ownership of the Java 17 + React Native stack for the full 30–35 day contract — from backend services and APIs through mobile features, refactoring, PR reviews, and production hardening. My approach would be practical and delivery-focused: first understand the existing Java 17 architecture and React Native codebase, identify the highest-risk areas, then deliver features while improving performance, maintainability, and stability alongside the implementation. For this engagement, I can contribute across: Java 17 backend services, APIs, business logic and integrations React Native feature development and existing-screen improvements Refactoring, debugging, performance and scalability work Code reviews and engineering best practices Mentoring junior/mid-level developers Collaboration with product/design and technical roadmap decisions I’m specifically comfortable with end-to-end ownership rather than working on only one layer of the application. I’m available for the required 30–35 day commitment and can start by reviewing the current architecture, priorities, and existing backlog.
₹70,000 INR in 30 days
3.7
3.7

Hi, I’m Lokesh, a Full Stack & Mobile Developer with 10+ years of experience. I have strong experience with backend development, JavaScript, React/React Native, REST APIs, databases and production application maintenance. I’m comfortable working across existing codebases, developing new features, refactoring for performance, reviewing code and collaborating with other developers. I can commit to the complete required period and start immediately.
₹35,000 INR in 7 days
3.2
3.2

Hello, My approach will include: Reviewing the architecture, codebase, and delivery priorities Developing end-to-end Javascript and React Native features Refactoring and optimizing existing services and mobile screens Writing clean, tested, and documented code Reviewing pull requests and improving development standards Mentoring junior and mid-level developers Supporting release planning and the technical roadmap I can work closely with your product, design, and engineering teams while taking ownership of delivery throughout the complete engagement. Before starting, could you confirm: Which Java framework and database are currently used? What features are prioritized for these days? What is the current React Native version? How many developers will require mentoring? What working hours and time-zone overlap are expected? Best Regards VDinfotech
₹45,000 INR in 7 days
2.6
2.6

Hi I have hands-on experience with Java 17 and React Native, including end-to-end feature development, API integration, refactoring, performance optimization, and production support, and I can commit for the full 30–35 day engagement. I’m also comfortable with PR reviews, technical guidance, and collaborating with product/design teams. 1. Is the existing Java backend based on Spring Boot, and what database is currently used? 2. Do you already have the React Native UI designs, or will implementation include UI work as well? if looking for expert then lets connect (expereince 7 yrs in development)
₹40,000 INR in 7 days
1.2
1.2

Hi, I’m an experienced **Full-Stack Developer** with strong hands-on experience across **Java 17 and React Native**, including building features end-to-end, maintaining existing codebases, refactoring, and improving performance. I’m also comfortable with **code reviews, technical leadership, mentoring junior/mid-level developers, and collaborating with product and design teams** to deliver production-ready solutions. I’m available for the required **exact 30–35 day engagement** and can commit to the full project duration. I’d be glad to discuss your current architecture, priorities, and roadmap. Best regards, Yash Kumar
₹29,000 INR in 7 days
0.0
0.0

Having spent a significant part of my career as a Full Stack Developer, I’ve gained extensive knowledge in developing and maintaining end-to-end functionalities while ensuring stability, scalability, and speed for your projects. I have hands-on expertise in both Java 17 and React Native – precisely what this role requires. Across both technologies, I have successfully developed numerous scalable web as well as mobile applications from inception to completion. In addition, I have a passion for continuously improving my skills and keeping up with the latest tools and frameworks in the technological landscape - an essential quality for any developer working on long-term technical roadmaps. My focus on writing clean, efficient code and delivering seamless user experiences aligns perfectly with your requirements. What makes me an excellent fit for your team is not only my technical proficiency but also my ability to lead and mentor junior developers. This ensures a collaborative environment where new ideas can flourish, contributing to your platform's overall growth and innovation .
₹25,000 INR in 7 days
0.0
0.0

Thanks for details. I Led full stack product development with Java backend services, React Native mobile apps. So I understand this workflow well and can get you strong result as you expect. Let's make helpful one Thanks Jefry
₹25,000 INR in 100 days
0.0
0.0

Hi, I’m an experienced full-stack engineer with strong experience across Java 17, React Native, JavaScript, and full-stack development, and I can take end-to-end ownership of your web and mobile initiatives. I can contribute to: * Building new features across Java 17 services and React Native * Refactoring and optimizing existing code for stability and performance * API and backend development * React Native mobile development * Code reviews, best practices, and technical mentoring * Working closely with product and design teams I’m ready to start immediately and can contribute hands-on while also helping your team maintain a scalable long-term architecture. Best regards
₹12,500 INR in 3 days
0.0
0.0

Hello! I would love to step in as your full-stack engineer to drive your web and mobile initiatives. With deep hands-on expertise across both backend architecture and mobile cross-platform ecosystems, I am well-equipped to build robust services in Java 17 and deliver seamless, performant interfaces in React Native. I completely understand the importance of maintaining a clean, scalable codebase, handling code reviews, and ensuring tight integration from backend services straight to the mobile client. How I will add value to your stack: Backend & Services: Developing and refactoring robust, high-performance features utilizing Java 17. Mobile & Frontend: Crafting smooth, responsive, and performant user experiences via React Native. Code Quality & Leadership: Enforcing stability, clean refactoring, and best practices across the entire development lifecycle. I am fully aligned with your 30-35 day timeline requirement and am ready to bring end-to-end ownership to your architecture. Let's connect and get this scaling!
₹21,000 INR in 30 days
0.0
0.0

With over 5 years of practical experience as a full-stack & app developer, I'm your ideal candidate for this project. As my tech stack aligns seamlessly with your project's requirements, from Java, React Native to extensive hands-on experience with REST APIs and backend development, I assure you that not only am I well-acquainted with your day-to-day tasks but can also contribute effectively to the technical leadership and guidance you require. What sets me apart is my ability to take your product from conception to launch and deliver clean, scalable code with end-to-end ownership. My clients vouch for my thorough testing procedures, effective problem-solving capabilities and transparent communication style. I'm eager to bring these qualities to the table for your project and ensure a smooth transformation of your existing codebase while scaling it for stability and speed. My commitment extends beyond merely writing code: I prioritize maintaining clean and maintainable architecture and offer complete support - from UI designs to backend development, right through to final deployment. So if you're looking for a dynamic and proficient engineer who can effortlessly marry Java 17 services with React Native interfaces while mentoring the team towards success at all levels, let's connect!
₹12,500 INR in 7 days
0.0
0.0

Hi, I’m Aman, and I can handle the full-stack development requirements across Java 17 and React Native. I understand that this is a 30–35 day engagement, and I’m comfortable committing to the required timeline. I can work on: Java 17 backend services and API development React Native mobile development New feature development across backend and mobile Existing codebase maintenance, refactoring and performance improvements API integration and end-to-end feature implementation Code reviews, best practices and technical guidance Scalable and maintainable architecture Previous relevant work: React Native / Mobile App Project Java / Backend Project Full-Stack Application Project Timeline: 30–35 days I can take ownership of the assigned features, coordinate the backend and React Native work properly, and provide clean, production-ready implementation. Please share the attached detailed requirements/codebase so I can review the current architecture and confirm the exact scope before starting. Regards, Aman
₹20,000 INR in 10 days
0.0
0.0

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