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Native iOS + Android Developer (Swift + Kotlin) — API-Based App --------------------------------------------------------------------- OVERVIEW --------------------------------------------------------------------- We are hiring a native mobile developer to build iOS and Android apps for an EXISTING web-based platform. The backend, APIs, database, and logic are already complete. The web CRM + marketplace will be the reference. Your job is to implement the mobile apps based on our instructions. This is NOT backend work. This is NOT product design. This is NOT guessing requirements. --------------------------------------------------------------------- WHAT YOU WILL DO --------------------------------------------------------------------- - Build native iOS app using Swift - Build native Android app using Kotlin - Connect to existing REST APIs - Implement screens based on provided structure - Translate existing CRM + marketplace flows into mobile - Implement dashboard-style screens - Implement messaging / inbox-style screens - Implement login, sessions, and push notifications - Deliver clean, stable builds --------------------------------------------------------------------- WHAT IS ALREADY DONE --------------------------------------------------------------------- - Backend logic - APIs - Database - Business rules - Web app (CRM + marketplace) - Screen structure and guidance You are NOT designing the product. You are implementing it in native mobile. --------------------------------------------------------------------- WHAT WE ARE NOT DOING --------------------------------------------------------------------- - No backend changes - No database work - No feature invention - No redesigning logic - No experimental frameworks - No vague or changing requirements --------------------------------------------------------------------- REQUIREMENTS --------------------------------------------------------------------- - Native iOS development (Swift) - Native Android development (Kotlin) - Experience with API-driven apps - Experience with CRM / dashboard / messaging apps - At least one real app shipped (store links preferred) --------------------------------------------------------------------- PLATFORMS --------------------------------------------------------------------- - iOS (Swift) - Android (Kotlin) --------------------------------------------------------------------- WORK STYLE --------------------------------------------------------------------- - Clear scope - Milestone-based delivery - Direct communication - More work available after initial phase --------------------------------------------------------------------- TO APPLY --------------------------------------------------------------------- Please send: 1) App Store / Play Store links to apps you built 2) Which platform you’re strongest in (iOS / Android / both) 3) Confirmation you work with native Swift + Kotlin 4) Short note on similar API-based apps you’ve built
Project ID: 40221145
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215 freelancers are bidding on average $539 USD 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 now earned 'Expertise' level in AI, ChatGpt and a couple of other AI platforms for App development and other Chatbot 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
$500 USD in 15 days
9.7
9.7

Hello, I’ve carefully read your requirement and I fully understand that this is a pure native mobile implementation project, not backend or redesign work. I have 6+ years experience building native iOS (Swift) and Android (Kotlin) apps, especially API-driven CRM, dashboard and marketplace style applications. I have integrated REST APIs, authentication flows, session handling, push notifications (FCM/APNs), and messaging modules in production apps. I am comfortable translating existing web CRM flows into clean, structured mobile screens while strictly following provided documentation and scope. I work milestone-based, communicate clearly, and deliver stable builds. I am strong in both platforms and confirm I work with native Swift + Kotlin only. Happy to share live app links in private chat. Looking forward to discussing further. Thanks. Jenifer
$500 USD in 15 days
9.5
9.5

Hello, i can work on both Platforms Android/iOS. i can show you multiple Native live applications. "About Me" i am a mobile applications developer and i have more than 8 years of experience developing mobile applications. i have done 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 USD in 30 days
8.8
8.8

⭐⭐⭐⭐⭐ Dear Valuable Client, CnELIndia, led by Raman Ladhani, is fully equipped to deliver your native iOS (Swift) and Android (Kotlin) apps by translating your existing web CRM and marketplace flows into mobile with precision. We will: Implement all screens exactly as provided, including dashboard and messaging modules. Integrate seamlessly with your existing REST APIs for login, sessions, push notifications, and real-time data. Follow a milestone-based approach ensuring clean, stable builds at each stage. Leverage our experience with API-driven apps and CRM/dashboard implementations to ensure a production-ready, bug-free release. Maintain direct communication, rapid updates, and strict adherence to scope, avoiding backend, design, or logic modifications. We have shipped native apps on both iOS and Android, making us confident in delivering your project efficiently and reliably.
$500 USD in 7 days
9.0
9.0

Hi, this is Elias from Miami. I went through the posting carefully and this is very clear: you already have the backend, APIs, database, and a working web CRM/marketplace, and you’re looking for a native mobile developer to translate that into clean, stable iOS and Android apps — no redesigning, no backend work, no guessing. This is exactly the kind of setup I prefer. I’ve built multiple API-driven native apps where the web platform acts as the source of truth, and the mobile apps focus on faithfully implementing existing flows: dashboards, inbox-style messaging, authenticated sessions, and push notifications. I’m comfortable working strictly from provided screen structures and API contracts and delivering predictable, milestone-based progress. A few specific questions to confirm alignment: Q1. Will the API contracts be fully documented (endpoints, payloads, auth, error states), or should I expect to infer details from the web app network behavior? Q2. For push notifications, are you already using a provider (Firebase/APNs), or should the mobile apps integrate with an existing notification service endpoint? Q3. Are we targeting feature parity with the web CRM at launch, or a defined subset of flows for the first mobile release? Happy to share store links and confirm platform strengths once we align on the above. Looking forward to connecting, Elias
$500 USD in 7 days
8.0
8.0

Hi, I understand your need for a precise and skilled native mobile developer to bring your existing web-based CRM and marketplace platform into intuitive, high-performance iOS and Android apps. With hands-on experience building native Swift and Kotlin apps connected to RESTful APIs, I specialize in translating complex web flows into seamless mobile experiences, especially for CRM and messaging systems. I’ve developed and shipped multiple native apps where clean code, stable builds, session management, and push notifications were critical. Your clear scope and milestone-driven approach fit perfectly with my collaborative style. I’ve shared an initial estimate based on your description, and once we go over a few technical or functional details, I’ll confirm the exact cost and delivery schedule. I’m ready to start immediately and look forward to delivering high-quality mobile apps that align perfectly with your web platform’s logic and flows. Which app store links can you share for your current web CRM or marketplace platform, to better understand the user flows expected in the mobile apps? Best regards, Asad
$250 USD in 10 days
8.2
8.2

As a seasoned and versatile Full Stack Developer with over 14 years of experience wielding a powerful set of skills including Android and PHP, I strongly believe I'm the right choice for your app development project. I specialize in creating efficient, secure, and scalable digital solutions that match your exact needs -- something you've underscored as a key requirement for this position. What sets me apart from other developers is not just my ability to implement existing structures, but my knack for enhancing those structures to adeptly cater to the native iOS (Swift) and Android (Kotlin) environments. This is evident in my substantial experience with API-driven apps and various CMS platforms like WordPress, Joomla, Drupal, etc. Moreover, demonstrating my commitment to providing the best possible results for clients is a track record of successful project delivery which includes tangible app store links for you to examine first-hand. To further bolster your confidence in me, I'd like to mention that working with native Swift + Kotlin aligns perfectly with the core skills I offer. Lastly, my work style -clear scoping and direct communication-, make me an ideal fit given that we can assure a productive working relationship from start to finish.
$500 USD in 7 days
8.3
8.3

Hello, Greetings Hope you are doing well. I am a Mobile Application developer with over 5 years of experience. I am confident in my ability and skills to develop high-quality Mobile apps and would like to work on your native app project. I will complete the work as per your requirements. I want to discuss more this project to prepare the final concept. So let’s discuss this in detail over chat then will make plans to start work on it. Waiting for your earliest reply. Thanks. Shubham
$250 USD in 14 days
8.0
8.0

I HAVE BUILT SEVERAL NATIVE MOBILE APPS CONNECTED TO EXISTING BACKENDS, INCLUDING CRM, DASHBOARD, AND MARKETPLACE FLOWS, DELIVERING CLEAN, STABLE, AND PRODUCTION-READY BUILDS. I propose to implement your native mobile apps exactly as specified: Scope: iOS: Swift, fully connected to your existing REST APIs Android: Kotlin, matching web CRM + marketplace flows Features: Login & session management, dashboard-style screens, messaging/inbox, push notifications Deliverables: Clean, stable, production-ready builds for both stores, fully aligned with your web app Work Style: Milestone-based, direct communication, no backend changes, no design, strictly implementation Strengths: Both iOS + Android native development, strong experience with API-driven apps, CRM and marketplace flows. Deliverables include: Native apps ready for App Store and Play Store submission, clean codebase, and 2 years of free post-launch support. I can provide store links to previous API-based apps and a short walkthrough of similar projects built.
$500 USD in 7 days
8.3
8.3

Hello, [[ ******** NATIVE MOBILE APP DEVELOPER ********** ]] I have gone through your description and I understand you need a Native iOS + Android Developer (Swift + Kotlin) to build mobile apps that mirror your existing web CRM + marketplace, using your already-built API backend. I bring 10+ years of experience in native mobile development and have successfully delivered API-driven CRM, dashboard, and messaging apps. Your project is a perfect fit for my expertise because I focus on exactly what is required: implementing screens, flows, and features as per your provided structure—no guessing, no redesigning, no backend work. What I will deliver: Native iOS app in Swift + native Android app in Kotlin API integration with your existing REST endpoints Dashboard-style screens and messaging/inbox flows Login, session management, and push notifications Clean, stable builds ready for App Store & Play Store My approach: Strictly follow your screen structure and business logic Agile workflow with milestone-based delivery Direct and clear communication In chat, I have some queries to ask regarding the project to proceed further. Awaiting your positive response. Thanks
$300 USD in 7 days
8.5
8.5

Hi, I will develop native iOS and Android apps with provided apis. I'm developing applications since 2019. I build in Swift, Kotlin and Flutter.
$500 USD in 7 days
7.2
7.2

NATIVE SWIFT + KOTLIN APPS CLEAN IMPLEMENTATION, ZERO SCOPE DRIFT You already have the backend, APIs, and CRM logic. You need disciplined native execution. That’s exactly how we work. Plan D Studios is a 12+ year full stack development team building native iOS (Swift) and Android (Kotlin) mobile apps connected to REST APIs, CRM systems, dashboards, and marketplace platforms. No outsourcing. No experimental frameworks. Direct answers: 1. We’ll share live App Store & Play Store links in chat. 2. Strong in both iOS (Swift) and Android (Kotlin). 3. Yes 100% native development. 4. We’ve built API driven mobile apps with authentication, sessions, push notifications, messaging modules, and dashboard style interfaces. Approach: • Map web CRM flows to mobile UX • Implement structured screen by screen builds • Clean API integration layer • Stable release ready builds with milestone tracking Do you want both platforms developed in parallel or staggered by priority? Let’s execute this cleanly. Regards, Haider
$500 USD in 30 days
7.3
7.3

As an ISO 9001:2008 certified IT service provider with over a decade of experience, including more than eight years in mobile app development, I believe I am the ideal candidate for your native mobile app development project. My native iOS (Swift) and Android (Kotlin) skills have been refined over several successful projects - some of which can be found on App Store and Play Store with links provided below. This showcases not only my proficiency in your project's chosen platforms, but also my ability to deliver clean, stable builds that users enjoy engaging with. I have specialized expertise in API-based app development which makes me perfectly suited for connecting your existing backend logic and comprehensive REST APIs to implement the app with streamlined efficiency. Additionally, my past experience creating CRM, dashboard, and messaging apps has honed my understanding of similar systems and functionalities to yours, ensuring a seamless execution of the provided screen structure and guidance. To ensure your peace of mind throughout this project, I offer clear scoping, milestone-based delivery, direct communication, and even more work availability after the initial phase.
$400 USD in 7 days
7.6
7.6

Hello, I’m a mobile developer with 5+ years of experience in Android, iOS, PHP, React Native, and Flutter, and strong hands-on experience building API-driven mobile applications that consume existing backend services and mirror web-based platforms. I confirm that I can work with native Android (Kotlin) and native iOS (Swift) and clearly understand that this role is focused only on mobile implementation, not backend or product design. Platform Strength: I work comfortably with both iOS and Android, with slightly stronger depth on Android/Kotlin, while also delivering production-ready Swift iOS apps. Relevant Experience: CRM-style mobile apps connected to REST APIs Marketplace & dashboard-based applications Messaging / inbox modules with real-time update Secure authentication, session handling, and push notifications Translating existing web workflows into native mobile experiences I follow clean architecture, modular code structure, and milestone-based delivery to ensure stable, maintainable builds. I can share App Store / Play Store links and demos of similar API-based apps in private message. Looking forward to discussing timelines and milestones. Best, Bhargav
$500 USD in 7 days
7.1
7.1

I’m a native iOS and Android developer working with Swift and Kotlin, and this project is a clean fit for how I like to work. With your backend, APIs, and web CRM already in place, my role would be straightforward: accurately translate the existing platform into stable, well-structured native mobile apps—no redesigns, no backend changes, no guesswork. I’ve built and shipped API-driven apps with dashboards, messaging/inbox flows, authentication, session handling, and push notifications. I work best with clear scope and milestone-based delivery, and I focus on clean code and production-ready builds. I’m comfortable delivering on both platforms and can share App Store and Play Store links on request. Best regards, Muhammad Jibran Ahmed
$420 USD in 4 days
6.6
6.6

Hi I’m a native mobile developer experienced in building Swift and Kotlin apps powered by existing REST APIs and production backends. A key technical challenge in API-driven CRM and marketplace apps is maintaining stable session handling, data sync, and performance across platforms. I solve this by implementing clean network layers, structured state management, and efficient push notification workflows. My background includes dashboard-style apps, messaging interfaces, and secure authentication integration. I work strictly within defined API contracts and replicate web flows accurately in native mobile environments. The apps will be stable, responsive, and aligned with your existing platform logic and UI structure. I deliver clean, production-ready builds with maintainable native codebases. Thanks, Hercules
$500 USD in 7 days
6.6
6.6

Hello, Thank you so much for posting this opportunity. It sounds like a great fit, and I’d love to be part of it! I’ve worked on similar projects before, and I’m confident I can bring real value to your project. I’m passionate about what I do and always aim to deliver work that’s not only high-quality but also makes things easier and smoother for my clients. Feel free to take a quick look at my profile to see some of the work I’ve done in the past. If it feels like a good match, I’d be happy to chat further about your project and how I can help bring it to life. I’m available to get started right away and will give this project my full attention from day one. Let’s connect and see how we can make this a success together! Looking forward to hearing from you soon. With Regards! Abhishek Saini
$750 USD in 7 days
6.6
6.6

Hi there, I am excited about the opportunity to develop your native mobile applications for both iOS and Android platforms. With robust experience in building API-driven apps using Swift and Kotlin, I am well-equipped to translate your existing web-based CRM and marketplace into functional mobile applications. I have successfully delivered multiple apps, including similar CRM and dashboard integrations, ensuring seamless API connections and stable builds. I prioritize clean code and efficient implementation, adhering closely to your established guidelines. I am ready to start promptly and work within a milestone-based structure, ensuring transparency throughout the process. Looking forward to discussing the finer details and kicking off this project. Thanks,
$750 USD in 30 days
6.6
6.6

Hi there, I’m a top California freelancer with extensive experience in developing native mobile apps for both iOS and Android, having successfully completed numerous tasks with 5-star reviews on this platform. I understand that you need a skilled developer to implement mobile applications for your existing web-based platform, and I'm confident I can deliver exactly what you're looking for. With proficiency in Swift and Kotlin, I will efficiently build the iOS and Android apps, connecting seamlessly to your existing REST APIs. I have substantial experience with API-driven apps, particularly in CRM and dashboard environments. My focus will be on delivering clean, stable builds that align with your already established backend, ensuring smooth user experiences without any product redesign. I’m available for direct communication and can provide milestone-based delivery. Let’s get started! Please feel free to reach out with the specifics of your project requirements, including how you envision the app functioning. What specific features do you want to prioritize in the mobile apps? Thanks,
$610 USD in 9 days
6.3
6.3

Hello, I’m a skilled mobile app developer with 7+ years of experience building high-quality applications for Android, iOS, and cross-platform frameworks like Flutter and React Native. I help startups and businesses turn their ideas into functional, user-friendly mobile apps delivered on time and tailored to your goals. My Skils Include: Native app development (Java/Kotlin for Android, Swift for iOS) Cross-platform app development (Flutter / React Native) Custom UI/UX implementation and responsive design API integration, Firebase, push notifications, payment gateways App performance optimization & bug fixing Play Store & App Store submission and post-launch support I’ve developed mobile apps across various industries including e-commerce, healthcare, education, finance, on-demand services etc. My focus is on clean architecture, smooth user experience, and long-term maintainability. If you're looking for a dependable mobile developer who understands both technical and business needs—let’s build something great together! Regards, Nikita Gupta
$300 USD in 28 days
6.3
6.3

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