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I’m picking up an almost-finished mobile app that another company left midway and I need an experienced developer to bring it across the finish line for both Android and iOS. The interface is essentially done, so your main focus will be completing the backend integration and eliminating the bugs that are still blocking release. Right now I don’t have any UI mock-ups to hand over, but I do have the full source code, API documentation, staging credentials, and a list of known issues. The original team never confirmed whether the codebase is native (Kotlin / Swift) or cross-platform (React Native, Flutter), so the first step will be a quick audit to see what you’re dealing with. From there we can map out the remaining tasks, set up access to the current Git repo, and agree on a sensible release schedule. Deliverables I expect: • Fully working backend integration on both platforms • All critical and major bugs resolved (zero crashes in QA) • Signed, release-ready builds uploaded to Google Play and the App Store (or TestFlight) and ready for my approval Acceptance will be based on clean test runs and approval from the two app stores. If this sounds like a challenge you can tackle, let’s talk so I can share the repo and the current issue tracker.
Project ID: 40317750
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Active 26 days ago
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83 freelancers are bidding on average $559 CAD for this job

Hello, Share the source code and other details like APIs Docs, Test Credentials etc so we can check and make it final. Hello, Regarding your project, i would like to discuss the app features in detail to better understand your requirements. i am a mobile applications developer and i have more than 8 years of experience developing mobile applications with backend services. i have completed more than 520 projects either local or internet based. i am confident i will provide you quality software services on time. Let's chat to proceed.
$400 CAD in 10 days
8.9
8.9

Hi, This is Elias from Miami. I checked your project description and understand you’re looking to finalize a mobile app that was left midway by another company. The goal is to get it completed and ensure it meets your requirements. I’ve worked on several similar mobile applications and understand the key technical challenges involved. My approach would involve reviewing the existing code, identifying the remaining features to implement, and ensuring a smooth transition for both Android and iOS platforms. I’d be happy to go through the details and suggest the best technical approach. I have a few questions to get a better understanding: Q1 – What specific features or functionalities are still pending for the app? Q2 – Are there any existing backend services or APIs that we need to integrate with? Q3 – What is your timeline for completing this app, and are there any specific platforms or devices you want to prioritize? Looking forward to hearing from you.
$500 CAD in 11 days
8.1
8.1

HELLO, I HAVE EXPERIENCE IN COMPLETING MIDWAY MOBILE APPS AND CAN SHARE RELEVANT EXAMPLES. I understand your requirement to finalize an Android and iOS app, including backend integration, bug fixes, and release-ready builds. With 10+ years of experience in mobile development across native (Kotlin/Swift) and cross-platform (React Native/Flutter) apps, I can audit your codebase, map out remaining tasks, resolve critical issues, and deliver signed builds ready for Google Play and App Store/TestFlight submission. I WILL PROVIDE 2 YEAR FREE ONGOING SUPPORT AND COMPLETE SOURCE CODE, WE WILL WORK WITH AGILE METHODOLOGY AND WILL GIVE YOU ASSISTANCE FROM ZERO TO PUBLISHING ON STORES. I am confident in bringing your app to a stable, production-ready state efficiently. I eagerly await your positive response. Thanks.
$494 CAD in 9 days
8.4
8.4

HELLO, I HAVE REVIEWED YOUR REQUIREMENTS AND FULLY UNDERSTAND THE SCOPE TO FINALIZE YOUR ANDROID AND IOS APP. I HAVE 10+ YEARS OF EXPERIENCE IN MOBILE DEVELOPMENT ACROSS NATIVE (KOTLIN, SWIFT) AND CROSS-PLATFORM (REACT NATIVE, FLUTTER) APPS. I WILL START WITH A FULL CODE AUDIT TO CONFIRM TECH STACK, THEN COMPLETE: Backend integration for both platforms Resolution of all critical and major bugs, ensuring zero crashes in QA Signed, release-ready builds for Google Play, App Store, or TestFlight I WILL PROVIDE 2 YEARS FREE ONGOING SUPPORT AND COMPLETE SOURCE CODE, WORK USING AGILE METHODOLOGY, AND ASSIST FROM INITIAL AUDIT TO FINAL STORE PUBLISHING. I EAGERLY AWAIT YOUR POSITIVE RESPONSE. THANKS
$294 CAD in 2 days
8.3
8.3

Hi. As an Android and iOS Expert, I am very interested in your project. As you can see on my reivews, I am very familiar with Android Studio, Xcode, Flutter, React Native, PlayStore and AppStore. I have mobile and backend skills with 8+ years. I wish to work for you. Thanks for attention.
$250 CAD in 5 days
7.3
7.3

Picking up where another team left off is a specific skill you need someone who can read an unfamiliar codebase quickly, assess what's actually done versus what just looks done, and finish it cleanly without introducing new problems. You've got the right assets ready: source code, API documentation, staging credentials, and a known issue list. That's enough to start a proper audit before committing to a full scope. Here's our approach: codebase audit first stack identification, integration gaps mapped, bug severity assessed against your issue tracker. From that audit you get a clear picture of remaining work, realistic timeline, and no surprises mid project. Then we complete the backend integration, resolve critical and major bugs to zero crash QA standard, and deliver signed release ready builds for both App Store and Google Play. We've taken over abandoned mobile projects before the audit phase is what separates a clean finish from another incomplete handover. Plan D Studios 12+ years in mobile app development, backend integration, and iOS/Android store submission. All in house. Ready to start with a repo access and issue tracker review no commitment needed until the audit is complete and scope is agreed. What's the primary platform your users are on iOS, Android, or equal split? Let's finish this properly. Message us. Regards, Haider
$2,000 CAD in 25 days
7.2
7.2

Hi there To bring an almost-finished mobile app to release, the most critical part is auditing the codebase and stabilizing backend integration so both platforms behave consistently. I’ll approach this by first identifying the app’s architecture and resolving integration gaps, then systematically fixing critical bugs that block QA and store approval. This means the app can run reliably, connect to APIs correctly, and pass submission requirements without unexpected crashes. My process is simple. First, I review the codebase, API connections, and issue list to define what’s missing and what’s broken. Then I complete the integration, fix bugs, and prepare stable builds for testing and submission. After scope and requirements are confirmed, I will provide the exact timeline and budget based on the current state of the project. If it aligns with you, let’s discuss in detail via private chat.
$500 CAD in 7 days
6.7
6.7

Hi, It will be an honor for me to work with you. I have got 12 years of mobile application development experience (iOS, android and flutter). Lets discuss this in detail and get this started and finish the project for you quickly. Looking forward to hear from you.
$600 CAD in 7 days
6.9
6.9

Hi I will be able to help you. Please message me so that we will have detail technical discussion. I have 9+ years of combined experience in Mobile Application development, in Native on Android Java, kotlin and IOS Swift, and For Hybrid Cross platform on Flutter Dart & React- Native, and for web and backend on react js and node js, Python Django , java spring boot and php CodeIgniter mvc. Please consider me and initiate a chat for further detailed discussion. Regards, Anju
$500 CAD in 7 days
6.6
6.6

Hello There!!! ★★★★ (Completing Android & iOS app with bug-free backend integration) ★★★★ I understand you need an experienced developer to finalize your partially-built mobile app. This includes auditing the current codebase (native or cross-platform), completing backend integration, fixing all critical and major bugs, and delivering signed, release-ready builds for both Google Play and the App Store. ⚜ Audit existing codebase and confirm tech stack ⚜ Complete backend integration for Android & iOS ⚜ Fix all critical and major bugs ⚜ QA testing to ensure zero crashes ⚜ Prepare signed release builds ⚜ Upload to Google Play / App Store or TestFlight ⚜ Documentation of final changes and deployment steps I have successfully finished apps left mid-development before, ensuring smooth releases and store approvals. Ready to start asap and bring your app live. Warm Regards, Farhin B.
$256 CAD in 15 days
6.5
6.5

As an experienced software developer, I've honed my skills to become the efficient and intuitive problem solver your project needs. Having successfully delivered similar ventures in the past, I understand the complexities involved when it comes to joining projects midway. My strong command over both Android and iOS platforms coupled with a deep understanding of various programming languages such as Kotlin, Swift, React Native, and Flutter equips me to adeptly handle any challenge your app throws my way. One of my core expertise lies in mobile app development; I have considerable experience working on both native and cross-platform apps and specialize in backend integration and troubleshooting. This makes me perfectly suited for the task at hand - completing the backend integration and eliminating the known bugs in your mobile application. In addition to technical expertise, I pride myself in being reliable and detail-oriented. I believe open lines of communication are essential for any successful partnership, so you can expect clear communication throughout our endeavor. Thanks.....
$750 CAD in 7 days
6.3
6.3

Hi there, I have 5+ years of experience in mobile app apartment DEVELE development. Including I have experience in cross platform(react native) and native(kotlin, swift) development i can fix bugs and start integrating api services into your app lets connect to discuss more about it and get started thank you.
$500 CAD in 7 days
5.4
5.4

As an experienced Flutter and Android developer with over a decade of experience in the IT field, I am confident in my ability to successfully complete your mobile app project. Throughout my career, I have served as both a company developer and an individual freelancer, delivering satisfactory results for all my clients. In fact, I have led teams of up to 7 members to finish over 150 big projects and successfully collaborated with over 20 clients across the globe. These experiences have honed my skills not just in Android and Flutter development, but also in effectively integrating numerous third-party APIs - much like the backend integration task you require. Transparency and communication are vital in any successful project, and that's why I understand your desire for frequently sharing documents that explain APIs and functions as well as daily chats on progress. I'm not just all about skills; I value trust and excellent teamwork to ensure flawless results within deadlines. That said, apart from Android (Java) and Flutter (Dart), I also possess backend development skills including Laravel, PHP, Node, and CI which could be useful should we need any further backend integration or troubleshooting work.
$500 CAD in 7 days
6.2
6.2

As a seasoned full-stack developer with extensive experience in Android development, I'm adept at handling challenges like the one you're facing — picking up an almost-finished mobile app and seeing it through to completion. My expertise in both front-end and back-end development make me the perfect fit for your project as I can not only iron out the remaining bugs but also ensure seamless backend integration on both platforms. My familiarity with popular frameworks such as React Native along with my proficiency in using Kotlin and Swift allows me to work smoothly across different codebases, regardless of whether it's native or cross-platform. Additionally, my deep understanding of API consumption and creation further solidifies my position as the right candidate to deliver a fully working, release-ready build. Furthermore, having worked on similar projects in the past, I recognize just how critical it is to meet deadlines without compromising on quality. Your satisfaction depends on clean test runs and my commitment to delivering zero crashes during QA. Rest assured that with my strong debugging skills and performance-oriented mindset, I'll not only resolve all known issues but also anticipate potential ones before they arise, ensuring a smooth submission process to both app stores. Let's get your app finalized and deliver a top-notch product!
$500 CAD in 20 days
5.2
5.2

Hello, I have reviewed the details of your project. i will start with a full audit of the existing codebase to confirm the platform and dependencies, review the api documentation, and map out all remaining backend tasks. after that, i will fix critical bugs, complete api integrations, and ensure data flows correctly between frontend and backend on both android and ios. final testing will include qa runs, crash elimination, and verification of all features against the current issue tracker. i will then prepare release-ready builds for google play, app store, and testflight, handling signing, provisioning, and configuration for each platform. automated and manual tests will confirm stability, and a final review with you will ensure the app meets all functional and performance expectations. Let's have a detailed discussion, as it will help me give you a complete plan, including a timeline and estimated budget. I will share my portfolio in chat I look forward to hear from you. Thanks Best Regards, Mughira
$500 CAD in 7 days
5.1
5.1

I understand you have an almost finished mobile app and need someone to audit the codebase complete backend integration and stabilize it for release. With over ten years delivering production apps I have taken over incomplete projects and brought them to app store readiness. I will first audit whether it is native or cross platform review API connections and identify gaps. Then I will fix critical bugs ensure stable data flow and prepare signed builds for both Android and iOS. The focus will be reliability clean testing and a smooth approval process for both stores.
$500 CAD in 13 days
4.4
4.4

HELLO, I CHECKED YOUR REQUIREMENT CLEARLY AND UNDERSTAND YOU NEED AN EXPERIENCED DEVELOPER TO FINALIZE YOUR PARTIALLY COMPLETED ANDROID & IOS APP WITH BACKEND INTEGRATION AND BUG FIXES. <<------FINALIZE ANDROID & IOS APP------->> I HAVE 8+ YEARS EXPERIENCE IN MOBILE APP DEVELOPMENT, DEBUGGING, AND API INTEGRATION, WITH STRONG EXPERTISE IN TAKING OVER INCOMPLETE PROJECTS AND DELIVERING STORE-READY APPS. <<--------What I’ll do:-------> Audit the existing codebase to identify stack, issues, and gaps. Complete backend/API integration across both platforms. Fix all critical and major bugs to ensure zero crashes. Optimize performance and ensure smooth app behavior. Prepare and submit release-ready builds for App Store and Google Play. <<--------Delivery:-------> Fully functional app with completed integrations. Bug-free build tested across devices and OS versions. Signed and store-ready builds uploaded for approval. Clear handover with notes on fixes and improvements. LET’S DISCUSS YOUR PROJECT IN DETAIL — LOOKING FORWARD TO YOUR RESPONSE. THANKS
$250 CAD in 7 days
5.0
5.0

Hi, I am Raj Abhisek Panda, a mobile developer with 7 years of experience across React Native, Flutter, Kotlin, and Swift. So regardless of what the audit reveals about the existing codebase, I can work with it directly without needing a handover period. Taking over a half-finished project from another team is something I have done before. The first thing I do is a thorough audit — understand the architecture, map the incomplete backend integration points against the API documentation, and go through the known issue list to separate critical blockers from cosmetic fixes. From that audit I will give you a clear task breakdown and realistic timeline before any actual development begins, so there are no surprises mid-way. On the backend integration side, I am comfortable working with REST APIs, staging environments, and authentication flows across both Android and iOS. I will make sure the integration is consistent on both platforms and does not behave differently depending on the device or OS version. For delivery, I will prepare signed release builds for Google Play and the App Store, handle the submission requirements for both platforms, and make sure everything is ready for your approval before anything goes live. Share the repo and issue tracker whenever you are ready — I can start the audit immediately. Thanks, Raj
$500 CAD in 10 days
4.1
4.1

Hi, As per my understanding: You need a senior mobile developer to complete backend integration, squash all critical bugs, and prepare release‑ready builds for both Android and iOS, using your existing codebase, API docs, staging setup, and known‑issue list. Implementation: - First audit the repo to confirm if it’s native (Kotlin/Swift) or cross‑platform (React Native/Flutter). - Finalize API calls, auth, and sync logic on both platforms. - Fix crashes and major issues, then publish signed builds to Google Play and App Store/TestFlight. I’ll share my portfolio on your first message and can work within your timeline and budget. A few quick questions: 1. Do you already have active Google Play Console and Apple Developer accounts? 2. Is payment, chat, or real‑time data involved in the app? 3. How do you prefer to coordinate (weekly calls, async updates, etc.)? Best regards
$950 CAD in 30 days
4.2
4.2

With your project description in mind, I'm confident I can bring your almost-finished mobile app to completion. As a seasoned Full-Stack Developer with over 7 years of professional experience, I've successfully built complex mobile apps from scratch, handled backend integrations, and resolved bugs efficiently. My expertise extends to both native (Kotlin / Swift) and cross-platform (React Native, Flutter) development, so I'm well-equipped for the codebase audit that may be necessary. My commitment aligns perfectly with what you expect to receive: fully functioning backend integration on both platforms, resolution of all critical and major bugs, and signed, release-ready builds uploaded to Google Play and the App Store. I understand that clean test runs and approval from the two stores are essential for acceptance - and believe me when I say your project will be in good hands. Clients repeatedly choose me for my exceptional communication skills, clean code writing practices as well as my ability to make informed decisions that save time and money. Additionally, my consistent on-time delivery record - with 98% of my projects being completed on or before deadline - demonstrates my dedication to delivering exceptional quality work on schedule. Send me the repository and the current issue tracker;
$500 CAD in 7 days
3.9
3.9

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