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I need a developer who can cleanly integrate a third-party API into my existing mobile app, which is available on both iOS and Android. The goal is to expose the new data endpoints throughout the app, handle authentication, and make sure every call is efficient and secure. The current code-base is well-structured and under version control; you will receive access to a dedicated branch along with the API documentation and sample keys. Once the endpoints are wired in, I expect you to write or adjust unit tests, verify the integration on real devices for both operating systems, and push a merge request for review. Deliverables • Fully implemented API calls with error handling • Updated UI where new data appears (if needed) • Passing unit tests and a quick usage note in the README I’m looking for someone who has already shipped at least one production-ready API integration for both platforms, is comfortable with Git, and can start as soon as possible.
Project ID: 40382665
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157 freelancers are bidding on average $19 USD/hour for this job

Greetings from Logictrix! My name is Jas, and I am looking forward to discuss about your app in details over the Chat or Call. We have enough app developers available in team so I can assure you to deliver this project at a fairly low cost with great quality and with a commitment for long term support. *** We have earned 'Expertise' level in AI development and used many AI platforms like openAI, Freepik, Antigravity, Cursor etc for App development and other AI work! *** We have developed around 400+ Android and iOS apps using Native and Flutter SDK in the past 15 years, Many apps are Live in Google play and App store. We will share our detailed portfolio over the Chat once we connect. Looking forward to your reply... Thanks and Regards Jas
$15 USD in 40 days
9.7
9.7

With over a decade of experience in mobile app development and API integrations, I understand the importance of cleanly integrating a third-party API into your existing mobile app on both iOS and Android. Your goal to expose new data endpoints, handle authentication, and ensure efficiency and security aligns perfectly with my background in high-complexity systems such as scaling for over 1 million users. One strategic insight I have for this project is to prioritize error handling in the API calls to ensure data integrity and smooth user experience. I have successfully implemented similar API integrations in the past, including one that served over 1 million users, proving my capability to handle projects of this scale. I encourage you to reach out so we can discuss the roadmap for integrating the API into your app efficiently and securely. Let's work together to enhance your mobile app and deliver a seamless user experience.
$20 USD in 15 days
9.1
9.1

Hello, i can reduce my Hourly rate to 12usd and i can start integrating APIs into your existing apps right away. 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 525 projects either local or internet based. i am supet confident i will provide you best quality software services on time and on budget. Let's chat to proceed.
$15 USD in 40 days
8.9
8.9

As the founder of CnELIndia, I have overseen the well-executed implementation of countless APIs and can confidently wield my 18 years of industry experience to ensure seamless integration of the third-party API into your existing mobile app. My team at CnELIndia, a reputable web and app development enterprise, has a proven track record which includes shipping multiple production-ready API integrations across various platforms. We are especially proficient in PHP, the heart of your project’s back-end. Our expertise includes writing or adjusting unit tests, verifying integration on real devices for both iOS and Android, and ensuring that every call is secure and efficient. Moreover, our commitment to hard work positions us perfectly to deliver your project ahead of schedule even with immediate commencement. Beginning right away allows for review of the merged request in good time as well as ample opportunity to update the UI where necessary to enhance user experience. In conclusion, choosing CnELIndia for this project is opting for excellence in service delivery, efficiency and utmost value for your investment!
$20 USD in 40 days
9.0
9.0

Hi there, I can help you integrate the third-party API into your existing mobile app, as I am a senior software developer and have worked on multiple API integrations for production apps on both iOS and Android, which you can check from my profile. Once you provide your current setup, API docs, and branch access, I will start with integrating the endpoints with proper authentication, error handling, and optimized API calls. Then I will update the UI wherever required, write/adjust unit tests, and test the integration on real devices to make sure everything works smoothly before pushing for review. I would request to connect once so we can review your setup and get started immediately. Thanks, Rahul A.
$15 USD in 40 days
8.5
8.5

Hello, To keep your mobile app fast as it grows, I will create a safe and organized data layer that keeps the API work separate from the UI. This makes the app easier to manage and prevents bugs. I will handle login securely using OAuth2 or JWT, store tokens safely, and automatically refresh them so users don’t get logged out. I will also make sure the app handles frequent API calls efficiently by improving network performance and adding caching to reduce loading time. Everything will be tested properly to handle real-world situations and edge cases. You’ll get a clean, documented merge request with an updated README. Best, Niral
$15 USD in 40 days
8.2
8.2

I HAVE SHIPPED PRODUCTION MOBILE APPS WITH FULL API INTEGRATIONS FOR BOTH ANDROID AND IOS USING REACT NATIVE AND FLUTTER, INCLUDING AUTHENTICATED ENDPOINTS, REAL-TIME DATA SYNC, AND TESTED RELEASE BUILDS. I can integrate your third-party API cleanly into your existing codebase while ensuring secure authentication, optimized network calls, and consistent data flow across both platforms. Approach: • Analyze current architecture and API docs • Implement secure API layer (token/auth handling) • Wire endpoints into existing app screens and state management • Add error handling, loading states, and caching where needed • Update UI only where required for new data exposure • Write/adjust unit tests and validate on real iOS + Android devices • Push clean merge request with documentation notes Deliverables: • Fully integrated API functionality • Stable UI updates (if needed) • Passing unit tests • Clean README update with usage notes • Production-ready merge request I am comfortable working with Git workflows and can start immediately.
$15 USD in 40 days
8.3
8.3

Hi there, I’m a full‑stack developer with over 5 years of custom coding experience, and I’ve shipped several production‑grade API integrations for iOS and Android apps. I’ve worked with third‑party services where authentication, efficient request handling, and solid error management were critical, so I understand exactly what you need for this project. My plan would be to start by pulling the dedicated branch, set up a thin wrapper around the API using async/await (or Kotlin coroutines/Swift async depending on the stack), and inject the auth flow securely. I’ll add comprehensive error handling and retries, then hook the new data into the existing UI components, updating any views only when the response is valid. After that I’ll write unit tests for the wrapper and UI layer, run them on real devices for both platforms, and push a clean merge request with a short usage note in the README. Do you have any specific performance thresholds or retry policies you’d like the integration to meet? Also, are there any UI mockups already prepared for the new data display? Looking forward to getting this wired up quickly and cleanly. Thanks.
$15 USD in 10 days
7.6
7.6

Hi, We’ve successfully integrated multiple third-party APIs into mobile apps, including solutions for iOS and Android. One of our recent projects involved integrating a complex API for a food delivery app, where we implemented features like real-time order tracking and driver management. We’re also strong in backend development, which means we can create optimized server-side endpoints that deliver only the necessary data to the app, reducing load times and improving performance. Let’s schedule a 10-minute call to discuss your project in more detail and see if I’m the right fit. I usually respond within 10 minutes. I’m eager to learn more about your exciting project. Best regards, Adil
$23.83 USD in 40 days
7.3
7.3

Hello, "As an experienced technical team from Live Experts LLC, integrating a third-party API is second nature for us. We have successfully implemented numerous APIs in mobile applications, including both iOS and Android platforms, making our expertise a perfect fit for your project. Our proficiency in Git ensures not only efficient integration but also proper version control for seamless transition." "In addition to our software development skills which include Android and iOS development, we have deep knowledge of PHP as well. This gives us an edge when it comes to handling your data with security and efficiency. Furthermore, we understand the value of thorough testing, hence can assure you reliable API calls along with error handling and updated UI to accommodate the new data if needed." "Moreover, we are more than just developers. We pay attention to the bigger picture while keeping a keen eye on the code level details. At Live Experts®, we not only meet the stated requirements but exceed expectations by making sure integration aligns with your application's broader goals. Given our track record of consistently delivering high-quality work, you can be confident that we will provide fully-implemented API calls, passing unit tests, and insightful usage notes as expected." Thanks!
$50 USD in 32 days
7.1
7.1

Hi, I will integrate apis to mobile application as per requirements. I am developing applications since 2019. Please message to discuss further through chat. Thanks
$20 USD in 40 days
7.2
7.2

I am a seasoned mobile app developer with extensive experience in integrating third-party APIs on both iOS and Android platforms. My technical proficiency includes successfully shipping several production-ready API integrations that required meticulous error handling and authentication. I have a strong command of the entire development lifecycle specifically focused on clean and efficient API calls. My experience with Git version control will ensure smooth workflow and collaboration. I understand the importance of validating integration on real devices and am adept at writing comprehensive unit tests to ensure high reliability. My previous projects have all involved updating UI components strategically to reflect new data endpoints effectively. I am keen to start promptly and am fully equipped to delve into your existing codebase. Could you provide a bit more detail on the specific data endpoints you wish to expose? Feel free to reach out for any further information or clarification on my experience.
$20 USD in 40 days
6.8
6.8

As a full-stack developer with over a decade of experience, my forte lies in delivering robust and reliable solutions. Having shipped numerous production-ready API integrations for both Android and iOS, I am confident in my ability to cleanly incorporate third-party APIs into your existing mobile app. My knowledge extends not only to deep-level coding but also performance optimization and security hardening, ensuring your data is handled efficiently and securely. My proficiency in Laravel, CodeIgniter, PHP, REST APIS, as well as Android and iOS Development languages, make me an ideal candidate for this project. With an aptitude for structuring code and strong familiarity with Git, I will efficiently handle the dedicated branch and version control of your existing app. I am committed not just to integrating the API but also to writing or adjusting unit tests for thorough testing on real devices of both operating systems. Moreover, my skills extend beyond mere development; I provide holistic support from installation and customization to performance optimization - crucial skills when handling APIs. My experiences which includes server scaling and database management will be an added advantage in ensuring impeccable integration on all fronts. Let's work together to enhance your app's functionality with the incorporation of this new API!
$20 USD in 40 days
6.9
6.9

Hi there, I have read your project requirement. You need an experienced developer to integrate a third-party API into your existing iOS and Android mobile app, ensuring secure authentication, efficient data handling, proper error management, and seamless exposure of new endpoints across the app. The integration should maintain your clean codebase, include updated UI where needed, and come with passing unit tests and documentation. We can quickly integrate the API into your current architecture, follow best practices for security and performance, update relevant screens, and ensure everything is tested and production-ready before submitting a clean merge request. A few questions: ============== Which mobile tech stack is your app built on (Flutter, React Native, native iOS/Android)? What type of authentication does the API use (OAuth, API keys, JWT, etc.)? Are there specific screens/features where the new data must be integrated first? Do you already have a testing framework in place (unit/integration tests)? Best Regards, Srashtasoft Team
$17 USD in 40 days
7.1
7.1

Hi, As per my understanding: you need a clean integration of a third-party API into your existing iOS and Android app, ensuring secure auth, efficient calls, and proper UI/data flow. Approach: * Integrate endpoints with auth and error handling * Update UI bindings for new data * Add tests and device-level validation Queries: * API auth type (OAuth, token)? * Native or cross-platform stack? I will share my portfolio on your first message. I will be looking forward to hearing from you. Kindest Regards
$15 USD in 40 days
6.9
6.9

Hello Experienced mobile developer specializing in clean and robust third-party API integration. I ensure seamless data flow, efficient error handling, and maintainable code within your app. Ready to discuss your specific API requirements and deliver a polished, reliable integration quickly. Giáp Văn Hưng
$20 USD in 7 days
6.7
6.7

Hi - API integrations usually look done once the first response shows up, but the real issues start when auth expires, one endpoint is slower than the others, or the app resumes mid-session on a real device. That can leave one platform showing stale or partial data, so I would treat request flow, token handling, and UI state as one integration path rather than separate tasks. The flow is: app requests new endpoint data -> auth is attached or refreshed safely -> API response is normalized into the existing app structure -> UI updates only where needed -> failures return clear fallback states -> tests verify both happy path and broken-response cases before merge. The part to get right early is the auth and response-mapping layer, because it affects both usability and correctness. This comes together cleanly once that boundary is set right.
$25 USD in 40 days
6.7
6.7

Hello! As per your project post, you’re looking to integrate a third party API into your existing mobile app for iOS and Android, ensuring secure authentication, smooth data flow, and proper exposure of new endpoints across the app. The system will enhance current functionality while maintaining stability and performance. The goal is to deliver a seamless integration that fits cleanly into your existing codebase and improves overall user experience. My focus will be on delivering a clean and efficient API integration, featuring: secure authentication handling and token management, seamless mapping of new endpoints into existing app flows, optimized API calls with proper error handling, smooth integration without breaking current features, and updated unit testing with real device validation for both platforms. I specialize in mobile and full stack development with strong experience in API integrations, scalable architectures, and performance optimization using React Native Flutter and modern backend systems. My focus is on ensuring clean integration, reliable performance, and maintainable code aligned with your current structure. Let’s connect to review your API documentation, app workflow, and define a clear integration and testing plan. Best regards, Nikita Gupta.
$15 USD in 40 days
6.7
6.7

I can integrate the third-party API into your existing mobile app cleanly across both iOS and Android. I’ll handle authentication, structure efficient and secure API calls, and ensure proper error handling throughout the app. I’ve worked on production-level API integrations, so I’ll make sure the new endpoints are wired in without breaking your current architecture. If any UI updates are required to display the new data, I’ll implement them in line with your existing design. I’ll also update or add unit tests to cover the integration, test everything on real devices, and submit a clean merge request. You’ll get a short README update explaining how the integration works and how to use the new endpoints. Share the repo and API docs, and I can start immediately.
$15 USD in 10 days
6.3
6.3

As an AI and Embedded Systems Engineer, I thrive when faced with the challenge of integrating complex systems, which is exactly what your project entails. I have a proven track record of successfully implementing APIs in impactful apps on both iOS and Android platforms. My solid understanding of BLE device integration with mobile apps would prove especially useful to your project. Moreover, my proficiency in Software Development complements my expertise in APIs. I understand the importance of clean code, version control, and thorough testing - all essential features that you are looking for. With my skills in REST APIs and cloud backends such as Firebase and AWS, I can ensure not just efficient calls, but also secure and scalable operations. My commitment to creating end-to-end solutions means that I will not only complete the API integration but also provide assistance with any UI updates as needed. The unit tests will be diligently revised and documented, leaving no loose ends unattended. Trust me to turn your existing mobile app into one that flawlessly communicates with the third-party API for optimum performance across multiple devices.
$25 USD in 40 days
6.6
6.6

Maputo, Mozambique
Member since Sep 14, 2025
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