React Native/Expo Developer Needed — Help Finish In-Progress Mobile App (1 Week Sprint)

@diektech

Hi — Elias here from Miami. I see you have an in-progress Expo/React Native mobile app built on an existing B2B web application. The goal is to complete the app efficiently while ensuring seamless integration with your current setup. A common issue with projects like this is ensuring smooth communication between the mobile app and the backend. What usually matters most is maintaining performance and reliability, especially under varying user loads. The tricky part is managing state effectively across platforms and ensuring user permissions are handled correctly. To tackle this, I would focus on a clear architecture that prioritizes maintainability and scalability. Setting up robust API endpoints and using state management libraries can help streamline interactions, ensuring the app remains responsive and future-proof for additional features. I've worked on similar mobile projects where I enhanced existing applications, focusing on optimizing user experience and backend efficiency. A few questions to better understand the scope: Q1 – What specific functionalities are you looking to finalize in this sprint? Q2 – Are there any integrations with third-party services that need to be prioritized? Q3 – How do you envision the user roles and permissions within the app? Happy to go through the details and suggest the best technical approach. Looking forward to hearing from you.

@corpmember29

Hello, I HAVE WORKED ON SIMILAR EXPO/REACT NATIVE APPLICATIONS BEFORE AND I CAN SHOW YOU. I have carefully reviewed your requirements and understand that you need an experienced Expo/React Native developer to join your existing project, collaborate closely with your lead developer, complete the remaining screens and features, integrate with the existing backend, and prepare the app for EAS Build and App Store submission. I have 10+ years of experience in React Native, Expo, TypeScript, API integrations, EAS Build/Submit, and mobile application development. I can quickly onboard into an existing codebase, follow your development workflow, participate in daily syncs, and deliver high-quality features within your tight deadline. We will follow an Agile development methodology throughout the project. I will provide 2 years of free ongoing support, complete source code, and assist you from development through App Store and Google Play deployment. I am available on desk as per your convenient time zone and will work on your project until you are satisfied with my work. Thanks, Christina

@bhatti

Hi, I find that a quick chat always saves time. Let's grab a virtual coffee to map out the best approach for your project. Let me know your availability! I have 8+ years of experience in React Native and Expo development, with a proven track record of delivering high-quality solutions to 100+ clients. I specialize in collaborative mobile app development, with expertise in Expo/React Native and experience with EAS Build/Submit. I invite you to message me to discuss your project and review my portfolio. I am confident that I can help you finish your in-progress mobile app within the given timeline. Best regards, M H B

@a4logic

As one of the leading web service providers in Pakistan, I firmly believe in delivering top-notch results and ｔｈａt'ｓ ｗｈｙ I am confident that I am suited for this role. I have extensive experience working with React Native, especially within existing codebases, which aligns perfectly with your project requirements. With a keen understanding of React Native and Expo, I can jump into your app seamlessly and help conclude any remaining screens/features under your lead developer's supervision. Moreover, my fluency in EAS Build/Submit is another added advantage. Given your tight deadline and the impending need for App Store submission, my understanding of these processes will ensure a smooth transition as we approach the final stages of development. In this collaborative sprint, I assure you of my utmost dedication to synchronizing daily or near-daily with your lead developer to divide tasks effectively and avoid confusions. Lastly, I greatly emphasize on positive feedback and customer satisfaction. Like yourselves, our team at Yasir Software perceives no project too big or small; our aim is always towards creating that "WOW" factor to turn dreams into realities. This project is important to you and we are committed to ensuring it reaches its highest potential within the stipulated time period. Let's collaborate ('reach new heights'✓) and propel your mobile app to success!

@starttechno

Jumping into an in-progress Expo app mid-build under your lead's direction is exactly the kind of parallel sprint I work well in, so the priority isn't showing off my own architecture but matching yours and not stepping on your CTO's branches. First day I'd get the repo running locally, read the existing screens and API layer, and confirm the git flow (feature branches + small PRs, clear screen ownership) so we divide work cleanly and avoid conflicts. From there I pick up the remaining screens/native features you assign, keeping to your existing patterns for navigation, state and API calls rather than introducing new ones. I've shipped React Native/Expo apps end to end including EAS Build and Submit, so I can help push toward a demo-ready build and App Store submission prep within your 7-10 day window. I'm ready for daily syncs to re-scope and reprioritize as your lead's own work lands. Since you're building on top of a live B2B web backend, what are you using for data/state on mobile right now — React Query, RTK Query, or something custom — so I match it exactly and don't create duplicate fetching or caching logic? Tell me which screens are currently unassigned and I'll start there today. Muhammad Saad

@ahmadayaz

I am well-equipped to integrate swiftly into your team, focusing on completing the remaining screens and features of the Expo/React Native mobile app. With expertise in development and collaboration, I can ensure efficient progress within tight timelines. I prioritize clear communication, close coordination with your CTO and developer, and aim for a feature-complete app or demo within 7-10 days. Let's work together towards achieving your project goals effectively.

@techplusintl

Hi, To complete the remaining screens and features of your Expo/React Native mobile app, I will quickly familiarize myself with the existing codebase and collaborate closely with your lead developer. I will ensure that we divide the work effectively to meet your hard deadline. I have experience with EAS Build/Submit, which will be crucial for the upcoming App Store submission. I am available for daily syncs to ensure smooth progress and avoid any conflicts. Happy to discuss the details.

@webbookstudio

Hi there, We understand you're looking to complete an in-progress Expo/React Native mobile app within a tight deadline, needing an experienced developer to work on remaining screens and features in parallel with your lead developer. With our extensive experience in React Native and Expo, including a music voting mobile app built with React Native and a furniture store mobile app using Flutter, we're confident in our ability to jump into your existing codebase and contribute meaningfully. Our team has a strong background in collaborative development, ensuring seamless integration with your CTO and lead developer. Can you share more about the specific screens and features that need completion, and how you envision the daily syncs with your lead developer to ensure a smooth workflow? Feel free to message us to discuss the details! — Webbook Studio

@Herculesz

Hi I can join your existing Expo/React Native mobile app sprint and help complete the remaining screens and features under your lead developer’s direction. I have experience with Expo, React Native, TypeScript, API integration, navigation, state management, mobile UI implementation, native permissions, EAS Build, and EAS Submit. The main technical challenge is moving fast inside an active codebase without creating merge conflicts, duplicated work, or inconsistent patterns. My approach would be to quickly understand the project structure, follow your lead developer’s conventions, take clearly assigned screens/features, and keep communication tight through regular syncs. I can work from existing backend APIs, implement mobile flows that match the live SaaS platform, fix UI issues, and prepare features for internal demo readiness. I’m comfortable collaborating with a CTO and lead developer, using Git branches, pull requests, code reviews, and clear commit messages. I can also help with EAS build configuration, internal testing builds, and App Store submission preparation where needed. My focus will be practical sprint support that helps your team finish faster without disrupting the current build. Thanks, Hercules

@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 JavaScript, Mobile App Development, Agile Development, Backend Development, Frontend Development, React Native, Mobile Development, App Development, API Integration, Expo 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.     

@KatrinaQ

Hi, I'm a senior developer with 20+ years of experience, Top Rated on Freelancer.com with 1,500+ projects and a 5-star record, having delivered multiple Expo/React Native apps under tight deadlines. I'll review the existing codebase, align with your lead developer to divide work cleanly, and implement the remaining screens/features in parallel with daily syncs to avoid conflicts. I'll handle API responses, state management, and Expo-specific build issues, ensuring the app is feature-complete and stable for demo or App Store submission prep. I can start immediately and match your existing tooling (EAS Build/Submit included) for seamless integration.

@XanvraTECH

Hello, I am highly interested in assisting with the completion of your Expo/React Native mobile app project. With expertise in Mobile App Development, JavaScript, Agile Development, Backend Development, Frontend Development, Mobile Development, React Native, and API Integration, I am well-equipped to seamlessly integrate into your existing codebase and work collaboratively with your team to meet the project requirements. I am confident in my ability to contribute to the remaining screens and features under your lead developer's guidance, ensuring timely progress towards a feature-complete app ready for demo or App Store submission. - MY WORK STATS: ✨ https://www.freelancer.com/u/XanvraTECH I look forward to discussing this opportunity further and contributing to the successful completion of your project. Best regards, Warda Haider

@Hubready

Hello!, I am a Florida-based senior software engineer(frontend, backend, ecommerce, etc) and I read your React Native/Expo project carefully. I understand the goal is to finish an in-progress mobile app built on top of your existing web app within a tight 1 week sprint, so I’d focus on closing the gaps cleanly without disrupting the current codebase. I have about 15 years of experience with JavaScript, React Native, Expo, API integration, backend/frontend development, and Agile delivery. I’m the kind of developer who digs into the details first, because with in-progress apps the real risk is hidden structure, not just visible UI. My approach: 1) review the Expo app, web app flow, and API dependencies 2) identify unfinished screens, broken states, and sync issues 3) implement and test in small sprint-sized chunks 4) stabilize, polish, and hand off with clear notes Relevant work includes mobile and app builds like FitLoop, FieldTrack, and OrderBridge, plus production web systems where React and API reliability mattered a lot. Could you please clarify the following questions to help me better understand the project? 1) What are the exact must-finish items for this 1 week sprint, and which parts are already working well? 2) Are any backend/API endpoints still missing, or should I work strictly with existing APIs? 3) Do you want me to prioritize UI completion, bug fixing, or end-to-end app flows first? If you share the repo and priorities, I can jump in fast and help get

@codefusion53

Hi I understand you are looking for hands-on React Native/Expo help to finish an in-progress mobile app that already depends on your live B2B SaaS backend—working in parallel with your lead developer so you can reach feature-complete and demo-ready progress while minimizing merge conflicts. I’m an AI and Web Developer who also builds and integrates full-stack applications, and I’m comfortable jumping into existing JavaScript/Expo codebases to complete screens, wire up API calls, and smooth native/build workflows. My approach is structured and collaborative: follow your lead/CTO direction, keep changes small and reviewable, and focus on a working setup you can submit and demo. For this sprint, I’d start by reviewing the current Expo app structure, the remaining screen list, and the existing API integration patterns. Then I’d take ownership of a clearly agreed subset of screens/features, implement them behind the existing navigation/state conventions, and verify end-to-end flows against the backend. In parallel, I’d help ensure the project is aligned for EAS Build/Submit so you have a build ready for internal demo and App Store submission prep. I can also provide brief handoff notes for what I changed, so your lead developer/CTO can continue quickly without rework. Best, Justin

@efanntyo

Hi there, I hope this message finds you well. I am very interested in joining your team to help complete your in-progress Expo/React Native mobile app. With a solid background in React Native and Expo, I am well-versed in jumping into existing codebases and contributing effectively and efficiently. I understand the urgency of your project and the need for a swift completion. My experience with JavaScript, mobile app development, and API integration aligns perfectly with your requirements. I have successfully collaborated in agile development environments, ensuring seamless integration with existing teams and projects. I am also familiar with EAS Build/Submit processes, which will be crucial as we approach App Store submission. I propose to work closely with your lead developer and CTO to divide tasks and ensure we are aligned and focused on delivering the necessary features without conflicts. Regular syncs and a collaborative approach will be key to meeting your tight deadline. My goal is to contribute significantly to your sprint, ensuring the app is feature-complete and ready for demonstration or submission prep within the desired timeframe. I am enthusiastic about the opportunity to bring my skills to your project and help achieve a successful outcome. Best Regards,

@vishal1145

Your Expo app will fail App Store review if the native module configurations aren't locked down before EAS Build. I've seen teams lose 2 weeks in rejection loops because they didn't validate entitlements and permissions upfront. Quick questions - are you using any custom native modules that need bridging? And is your backend API rate-limited for concurrent mobile sessions during testing? Here is the architectural approach: - REACT NATIVE/EXPO: I'll audit your existing screen components for state management conflicts and implement remaining UI flows using your established patterns to avoid merge hell. - API INTEGRATION: I'll sync with your CTO on endpoint contracts and handle error boundaries for offline scenarios so the app doesn't crash when network drops. - EAS BUILD/SUBMIT: I'll configure build profiles, validate provisioning certificates, and prep the submission checklist so you hit App Store requirements on first try. I've completed 8 Expo apps that went live without rejection, including 2 emergency sprints like this where I joined mid-build. Let's do a 20-minute technical handoff call with your lead dev tomorrow to divide the remaining screens and avoid stepping on each other's commits.

@Curveballsol

Hello, I understand that you are looking for an experienced Expo/React Native developer to assist in completing an in-progress mobile app within a tight deadline. With expertise in JavaScript, Mobile App Development, Backend Development, Frontend Development, and React Native, I am confident in my ability to seamlessly integrate into the existing project and deliver the required screens and features efficiently. I have a proven track record of collaborating effectively with lead developers, ensuring smooth communication and coordination throughout the project. My portfolio includes successful projects that showcase my skills and experience in this field. I am committed to meeting your project requirements and delivering high-quality results within the specified timeframe. Best regards, Curveball Solutions https://www.freelancer.com/u/Curveballsol

@umairdev101

I can help you complete the React Native/Expo Developer Needed project within your one week sprint. I am an expert in building cross platform mobile applications that integrate seamlessly with existing B2B web backends. I have extensive experience using Expo and React Native to bridge web features into native mobile environments, specifically handling complex API integrations and shared logic between platforms. I am available to start immediately and work in an agile environment to hit your deadline. I will ensure all remaining features are polished and the app is ready for deployment. Can you share the current repository or a list of specific remaining tasks so we can get started right away?

@denisSolution

Hi, I understand you need someone who can jump into an existing Expo/React Native codebase and help finish the remaining screens under tight timing, while coordinating with your lead developer to avoid conflicts. I’ve worked on similar React Native projects where we had to align with an existing team and ensure smooth integration with existing APIs, even when the first pass needed some cleanup around state management. I’d approach this by treating it as a controlled sprint—using the existing Expo setup while keeping changes modular to make reviews and merges straightforward. That way, we can move fast without introducing regressions. I’ll keep changes isolated in feature branches and sync daily to match your lead’s progress, so nothing overlaps or breaks. The goal is to get the app to a demo-ready state quickly, with a build ready for App Store submission prep. If this fits your needs, I can start right now. Thanks, Denis