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Senior AI-Native Full-Stack Developer — Complete Existing React Native / TypeScript Product to V1.5 We are looking for one exceptional hands-on senior full-stack developer, or a very small two-person team only if genuinely necessary, to complete and production-harden an existing AI-assisted consumer software product. This is not a greenfield project. A substantial React Native / Expo / TypeScript / serverless codebase already exists, together with a detailed V1.5 build specification, UX direction, acceptance criteria and prepared product knowledge. We will provide the detailed product specification, user journeys, research, knowledge/brain material, content, example cases and rapid product decisions. We will do the non-engineering heavy lifting. Your role is to validate the existing build, preserve and refine good code, complete missing engineering, integrate the supplied material, test the critical flows and take the product to a stable V1.5 release. We expect an AI-native development methodology using coding agents / modern AI-assisted development, proven libraries, managed services and low-code/no-code where they genuinely reduce development time. Core skills should include TypeScript, React Native/Expo, responsive web, backend/API development, data/state modelling, authentication/permissions, serverless/cloud, webhooks/queues, AI/LLM workflows, testing, integrations and deployment. Please provide who will personally do the work, relevant shipped products, your AI coding-agent workflow, how you would audit and complete an inherited codebase, your quote for the initial audit and V1.5 completion, milestone breakdown, availability and earliest start. No budget is published. Quote on the basis that the existing code is high quality and substantially reusable, the V1.5 specification is already prepared to a high standard, and we supply the research, journeys, brain/knowledge material and other non-code inputs.
Project ID: 40681601
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257 freelancers are bidding on average $2,188 USD for this job

Hi — Elias here from Miami. I see that you’re looking to finalize a React Native product to version 1.5. Achieving this likely involves more than just coding; it’s about refining the user experience and ensuring the app is robust and scalable. What usually matters most here is ensuring maintainability and the ability to scale as your user base grows. The tricky part is usually integrating various backend services while managing state effectively. This can lead to performance bottlenecks if not planned properly. My approach would focus on creating a clean architecture that separates concerns, making future updates smoother. I’d implement best practices for API development and data modeling to enhance reliability. My past experience with similar projects has taught me the importance of building with future expansion in mind. A few questions to better understand the scope: Q1 – What user roles do you envision, and how should their permissions be managed? Q2 – Are there any specific integrations you foresee needing for this version? Q3 – What are your scaling expectations in terms of user load and data handling? Looking forward to hearing from you.
$2,500 USD in 10 days
8.3
8.3

Hello, I understand that you are seeking a Senior AI-Native Full-Stack Developer to complete and production-harden an existing AI-assisted consumer software product using React Native, TypeScript, and serverless technologies. My expertise lies in React Native/Expo, TypeScript, responsive web development, backend/API integration, data modeling, authentication, serverless architecture, and AI/LLM workflows. I excel in validating existing codebases, refining code quality, integrating supplied materials, and ensuring stable product releases. My approach involves leveraging modern AI-assisted development tools, proven libraries, and low-code solutions to optimize development efficiency. I have a strong track record of successfully completing projects, and I am well-equipped to handle the challenges presented in your project description. I am eager to discuss how I can contribute to the success of your project and provide value through my technical skills and problem-solving abilities. Please review my portfolio at https://www.freelancer.com/portfolio-items/11539740-microlent-systems-portfolio for relevant shipped products. Let's open a chat to delve deeper into your project requirements and discuss how I can help bring your vision to life. Sincerely, Rajesh
$1,500 USD in 60 days
7.7
7.7

Hello!, This is James from Hollywood... I can see the real pain point here: you do not just need a React Native developer, you need someone who can finish an existing product cleanly, tighten the backend, and get it to a reliable V1.5 without creating more tech debt. That is exactly how I work. My approach would be: 1. Audit the current Expo / React Native / TypeScript codebase and map blockers 2. Review API flow, data modeling, auth, and backend structure 3. Ship fixes in small, testable phases so every step is stable 4. Polish the app for performance, edge cases, and release readiness I focus on product completion, not just code output. That means I pay attention to the details most people skip: architecture consistency, API contract stability, scalable data handling, and making sure the app is maintainable after launch. Relevant work I have delivered includes: - a React Native habit tracker with offline sync - an AI SaaS dashboard with role-based access and analytics - a TypeScript logistics app with real-time status updates - a mobile booking app with custom backend APIs Two quick questions: 1. What are the top 3 features that must be completed for V1.5? 2. Is the backend already stable, or do you want me to help clean up API/data model issues too? 3. Do you have a priority list for bugs, UX fixes, and release tasks? If you want someone who reads carefully, thinks like a product owner, and can actually close the project properly, I’d be glad to chat.
$2,600 USD in 9 days
6.9
6.9

Hi — Puru here from ErgoSphere. You're essentially building a robust V1.5 of an AI-assisted consumer app using React Native, refining an existing codebase while integrating new AI-native features and services. What usually matters most here is seamless integration of AI workflows and ensuring the existing codebase is efficiently validated and enhanced to meet the new specifications. I'd recommend leveraging the existing TypeScript and React Native stack with enhancements via AI coding agents for rapid development. Utilizing serverless architectures like AWS Lambda, coupled with managed services, will ensure scalability and maintainability. Secure data handling can be achieved using OAuth2 and encrypted data stores, which are critical for sensitive information. I've worked on AI-native UIs, serverless deployments, data pipelines, and API integrations which directly map to your needs. A few questions to better understand the scope: Q1 – Are there specific AI models or libraries preferred for the existing feature set? Q2 – What managed services are currently in use, and are there any constraints on introducing new ones? Q3 – Could you clarify the extent of non-code inputs provided? A working prototype could reasonably be targeted within 5–7 weeks, followed by a polished release in roughly 3 additional weeks depending on integration complexity and testing cycles. Looking forward to hearing from you.
$3,000 USD in 30 days
6.9
6.9

Hello There! I’m Md Toriqul Islam, an experienced senior full-stack developer specializing in TypeScript, React Native/Expo, serverless architecture, APIs, AI/LLM integrations, and production-ready applications. I understand you need to audit, refine, complete, test, and production-harden an existing React Native/Expo/TypeScript product for a stable V1.5 release while preserving reusable code and integrating your prepared specification and product knowledge. I have rich experience with inherited codebases, AI-assisted development, authentication, state/data modelling, serverless backends, integrations, testing, and deployment. I am skilled in AI coding-agent workflows, TypeScript, React Native, Expo, APIs, cloud services, webhooks, queues, and LLM-based workflows. I have some questions: 1) Which CRM are you currently using, and do you already have the required API/integration credentials? 2) Do you have a preferred WordPress builder such as Elementor, Divi, or Gutenberg? 3) How many landing pages are you planning to build after the pilot page? I’m ready to start immediately and would be happy to discuss this project. Looking forward to hearing from you. Best regards, Md Toriqul Islam
$1,500 USD in 7 days
6.4
6.4

Hi there! I’m a full-time available React Native Developer with 6 years of expertise in creating mobile applications that work seamlessly on both iOS and Android platforms. I specialize in delivering high-quality, cross-platform apps that meet user needs and business goals. Technical Skills -React Native: Building efficient and scalable mobile applications with a single codebase. -JavaScript & TypeScript: Writing clean, maintainable, and type-safe code. -Cross-Platform Expertise: Proficient in developing apps for both iOS and Android platforms. -UI/UX Implementation: Transforming designs into intuitive and visually appealing interfaces. -State Management: Skilled in Redux, MobX, and Context API for managing complex app states. -API Integration: Experience in integrating RESTful APIs and GraphQL for dynamic app functionality. -Native Modules: Extending React Native capabilities with custom native modules when needed. -Testing & Debugging: Using tools like Jest, React Native Testing Library, and Expo for robust app performance. Whether you’re looking to create a brand-new mobile app or enhance an existing one, I’m here to help. Let’s collaborate to build a powerful, user-friendly app that works flawlessly on both iOS and Android platforms. Let’s create something incredible together! Regards, Nikita Gupta
$1,500 USD in 7 days
6.0
6.0

For a All-Inclusive AI React Native Full Stack Developer, the key is not just the screens but keeping the API and platform-specific behavior stable across devices. I've handled similar builds involving Software Development, Full Stack Development, Backend Development, React Native, usually where the important part was translating the brief into a reliable working system. My approach would be to first define the input schema, generation rules, and output validation, then build the workflow around those controls so AI output stays consistent. For this project, I would focus especially on: - Input workflow design, prompt/control rules, and output validation - Backend processing, file/document generation, and dashboard usability - Scalable cloud structure, API boundaries, and error handling If helpful, I can map the input-to-output workflow and where validation should sit before implementation. Best, Dr. Syafiq
$2,250 USD in 21 days
6.1
6.1

As an experienced full-stack developer with over a decade of experience, I believe I am the best fit for your project. In terms of core skills, I have an extensive background in TypeScript, React Native/Expo, responsive web design, backend/API development, data/state modelling, as well as serverless/cloud environments—one that aligns perfectly with your project’s requirements. Not only am I familiar with AI-assisted development methodologies including coding agents but I also embrace the use of modern proven libraries and managed services to optimize development time. Throughout my career, I have worked on numerous projects where I had to inherit codebases and ensure their stability while introducing new features—much like your current undertaking. To assure quality and precision during the course of this project, I make it a point to keep my clients informed and involved at every step. Given the detailed specification and research material you already have in place for a V1.5 build I promise I will utilize my diverse skill set and integration abilities to provide you with an end-product that is not just stable but also fully functional as per your needs. With these factors considered, I believe my reasonable quote if accepted fairly compensates for a clean and high-quality codebase that is substantially reusable while promising timely completion of milestones.
$1,500 USD in 12 days
5.7
5.7

Hi, I'm Denis, a full-stack developer with experience building AI-assisted applications and completing complex React Native/TypeScript systems. I understand you need a senior developer to audit, refine, and complete an existing React Native/Expo/TypeScript product to a stable V1.5 release. The project already has a detailed spec, UX direction, and core codebase, so the focus is on validating the build, integrating provided materials, and hardening critical flows rather than starting from scratch. I’d start with a thorough codebase audit to identify reusable components, potential issues, and areas needing enhancement. Then I’d implement missing features, refine state management and data modeling, integrate the AI/LLM workflows using efficient prompt handling and context management, and ensure robust authentication, permissions, and serverless backend logic. Testing, deployment, and post-launch adjustments would follow to ensure stability. The main risks here are unclear edge cases in the inherited codebase or gaps between the specification and implementation. I’d address these by running structured tests early, documenting assumptions, and aligning closely with your provided materials. I can start working right away. Let's connect and discuss the details. Thanks, Denis.
$1,600 USD in 20 days
5.6
5.6

Hello, Have you worked with AI-assisted development before? Is the existing codebase well-documented? Exciting AI project! I'll ensure the current code is optimized, fill in the gaps, and integrate all supplied materials seamlessly. Tackling potential code integration issues early will smooth the path to V1.5. Let's discuss project details, timeline, and budget in a chat or call. Looking forward to collaborating with you. Feel free to message me anytime!
$1,500 USD in 15 days
5.7
5.7

⭐⭐⭐⭐⭐ Complete Your React Native/TypeScript Product to V1.5 with Expertise ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project requirements and noticed you're looking for a Senior AI-Native Full-Stack Developer. You have no need to look any further; Zohaib is here to help you! My team has successfully completed 50+ similar projects in full-stack development. I will validate the existing code, refine it, and ensure smooth integration of your provided materials to achieve a stable V1.5 release. ➡️ Why Me? I can easily complete your React Native and TypeScript project as I have 5 years of experience in full-stack development, specializing in React Native, TypeScript, and serverless solutions. My expertise includes backend development, API integration, and testing. Besides, I have a strong grip on modern AI-assisted development methods and cloud services, ensuring a comprehensive approach to your project. ➡️ Let's have a quick chat to discuss your project in detail, and I can show you samples of my previous work. Looking forward to discussing this with you in chat. ➡️ Skills & Experience: ✅ React Native ✅ TypeScript ✅ Expo ✅ Serverless Architecture ✅ API Development ✅ Data Modeling ✅ Authentication ✅ Cloud Services ✅ Testing ✅ Integrations ✅ Web Development ✅ AI Workflows Waiting for your response! Best Regards, Zohaib
$1,800 USD in 2 days
5.5
5.5

As a seasoned full-stack developer who has transitioned my digital agency towards an AI-driven future, I'm well-equipped to handle the complexity and specificity of your project. My team and I at 360 Elevate boast a deep repertoire in React Native development, which will enable me to seamlessly integrate your existing codebase and bring your product to V1.5. Additionally, our experience with TypeScript, responsive web design, serverless architecture, and API development provide the needed core skills for this project. In terms of our AI-native approach, we've developed several AI-assisted software solutions for complex challenges such as data/state modeling, authentication/permissions, testing, and integrations - all of which are pivotal aspects for the continued success of your product. Our proven track record includes building successful systems with similar functionalities as yours, namely ERP and CRM frameworks.
$1,500 USD in 14 days
5.7
5.7

With extensive experience in React Native, TypeScript, and serverless architecture, I understand your need for a senior full-stack developer to elevate your existing AI-assisted product to V1.5. Could you share more about the existing codebase's challenges and the desired timeline for this project? Regards, Yogesh Kumar
$1,970 USD in 10 days
5.2
5.2

With full respect for the existing breadth of your project, I, Arsalan, and my team offer the comprehensive skill set you need to audit, refine, and produce your AI-assisted consumer software product. As an experienced full-stack developer who has excelled in AI-first approaches, we align with your vision for leveraging coding agents and AI-assisted development. Drawing from our accumulation of knowledge in technologies such as TypeScript, React Native/Expo, serverless/cloud computing, data/state modelling, and backend/API development, we are fully equipped to handle the complex engineering work that lies ahead. At the core of our approach is an unwavering commitment to quality and efficiency. My team and I have a proven track record of delivering secure and reliable solutions that can scale as necessary. We're not just passionate about coding; we are dedicated to designing optimized and user-friendly software for long-term growth. Choosing us means selecting a reliable partner for your project. Our expertise extends not only to engineering but also business optimization processes that will contribute valuable insights during the development journey. To reassure you of our capability and dedication, we can provide examples of our shipped projects paralleling to your own. Let's join hands in delivering the best version
$2,250 USD in 7 days
5.0
5.0

You need an experienced engineer to audit an existing React Native/Expo/TypeScript product, preserve what already works, and close the gaps preventing a stable V1.5 release. I would personally own the engineering work. My matching stack includes React Native, TypeScript, serverless APIs, authentication, data modelling, queues, webhooks, testing, deployment, and LLM workflows. At Marin Software, I shipped AWS serverless Python systems and LangChain agents with real-time pipelines and production safeguards. I use coding agents for bounded tasks such as repository mapping, test generation, and repetitive migrations, while architecture decisions, security review, integration, and final validation remain human-owned. I’d begin with a dependency, architecture, test, security, and release audit, then map each acceptance criterion to verified code changes and regression coverage. What backend and cloud services are currently used, and can shortlisted developers inspect the repository and V1.5 specification?
$1,550 USD in 5 days
4.9
4.9

Hi there, Your React Native / Expo / TypeScript product needs a careful audit to harden the inherited codebase and complete V1.5 without disrupting what already works. I have strong expertise in React Native, Expo, Software Development, Backend Development, MySQL, and API Development, and I’d approach this by tracing the current architecture, validating the data/state model, tightening auth and permissions, integrating the supplied AI/LLM flows, then testing the critical journeys and deployment path. Best regards, Ian
$2,500 USD in 5 days
4.7
4.7

I would start by auditing the existing codebase to identify missing features, unstable areas, and optimization opportunities. In a similar React Native project for a consumer AI app, a thorough review revealed subtle state management inefficiencies and incomplete API flows that once fixed improved both stability and UX. My approach involves using AI-assisted coding tools like GitHub Copilot and OpenAI for rapid implementation and testing, reducing manual coding time without sacrificing quality. I will preserve the solid code, integrate your detailed V1.5 specs and content, and verify all critical flows with end-to-end tests. Could you share whether the backend is fully serverless or a mix? Also, are there preferred AI/LLM services you want integrated, or is that open for recommendation? I will provide a transparent milestone plan starting with a focused audit—typically 3–5 days—followed by iterative development cycles aligning with your acceptance criteria. I’m ready to start immediately and deliver a stable, production-ready V1.5 on your timeline.
$1,500 USD in 7 days
4.9
4.9

Hello!! I understand you need a complete React Native application developed from start to finish, including the user interface, backend integration, testing, and production-ready Android and iOS builds. * Do you already have the design or reference screens? * Is the backend or API already available? * Do you already have Apple and Google developer accounts? The application will be built with clean React Native code, responsive screens, reliable API integration, authentication, testing, performance optimization, and final store-ready builds. Relevant React Native and cross-platform applications have been completed with strong focus on smooth user experience, stable functionality, and clean deployment. Let us chat and turn your complete idea into a polished application. Best regards Farhin B
$1,500 USD in 18 days
5.0
5.0

Hi there, I can take your existing React Native/Expo/TypeScript product from its current state through a stable V1.5 release. I’ll first audit the inherited codebase against your specification, then preserve what works, complete missing features, strengthen auth, permissions, state/data models, APIs, AI workflows, integrations and serverless components, and test the critical user journeys end-to-end. I work AI-natively with coding agents alongside proven libraries and managed services, while reviewing and validating all generated code. I’ll keep the architecture clean, production-ready and maintainable, with reliable deployment and clear milestone tracking. I can personally handle the work and provide relevant shipped-product examples, audit findings, milestone estimates and earliest availability. Looking forward to working with you. Thanks
$1,800 USD in 20 days
4.7
4.7

⚠️ If you're not happy, you don’t pay. ⚠️ Hi, Thank you for checking my proposal and sharing the detailed project brief. I can complete your existing AI-assisted React Native product to V1.5 using TypeScript, React Native/Expo, and serverless architecture with a robust and efficient design. I will deliver: • Comprehensive code audit and validation • Integration of supplied research and user journeys • Optimization of critical flows and performance • Implementation of AI-native workflows and features • Rigorous testing for stability and user experience • Documentation for future reference and maintenance You will also receive: • Continuous support during and post-launch • Insights on AI-assisted development methodologies I am confident I can execute your vision efficiently. Looking forward to discussing the timeline and next steps. Best regards, Chirag Pipal
$1,500 USD in 7 days
4.4
4.4

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