Talent badge filter
Skills filter
Aarti J.
$18/hr
100% Job Success
$20K+ earned
Start of list.
End of list.
Looking to build a high-performance iOS app that’s elegant, stable, and App Store ready? I'm a Top Rated iOS Developer with over 13 years of hands-on experience creating world-class iPhone and iPad apps using Swift, Objective-C, and SwiftUI. I help startups and enterprises transform their app ideas into functional, scalable, and visually stunning solutions. Whether you need to modernize legacy code, build from scratch, or debug a complex issue, I’m here to help. Services I Offer: Custom iOS App Development (iPhone & iPad) App Store Submission & Maintenance Legacy Code Refactoring (Objective-C → Swift) REST/GraphQL API Integration Firebase Integration (Realtime DB, Firestore, Auth) Payment Gateway Setup (Stripe, Apple Pay, Razorpay, etc.) UI/UX Design using SwiftUI or UIKit Performance Optimization, Crash Fixing & Debugging TestFlight Beta Testing Setup Consulting & Code Review My Tech Toolbox: Languages: Swift, Objective-C, SwiftUI UI/UX: Auto Layout, Storyboards, Animations, Interface Builder APIs: REST, GraphQL, OAuth, JSON, XML Databases: Core Data, Realm, Firebase, SQLite Tools: Xcode, Git, CocoaPods, Carthage, Fastlane, Jenkins Testing: XCTest, TestFlight, Crashlytics Project Tools: Jira, Trello, Asana, Agile/Scrum Industries I’ve Built Apps For: Healthcare: Telemedicine apps, fitness trackers, EMR systems Fintech: Secure payment apps, expense trackers, digital wallets E-commerce: Product catalogs, order tracking, cart & checkout Education: Learning apps, quiz games, LMS integrations Social: Chat apps, forums, event-based platforms Others: Real estate, travel, entertainment, logistics Why Clients Choose Me: - 13+ years in iOS development — reliable, scalable solutions - Pixel-perfect UI with smooth, native experience - Deep integration of third-party SDKs & custom APIs - Excellent communication — no guesswork or delays - Full support from planning to App Store submission and beyond Let’s build a high-quality iOS app your users will love. Message me now to discuss your idea.
SAMOSYS TECHNOLOGIES PRIVATE LIMITED
Associated with
SAMOSYS TECHNOLOGIES PRIVATE LIMITED
Volodymyr B.
$49/hr
100% Job Success
$100K+ earned
Available now
Offers consultations
Start of list.
End of list.
🔌 Powering 3.5M+ connected devices worldwide. My team delivers end-to-end IoT and AI-powered solutions — from firmware to cloud — for Smart Home, Automotive, Energy, and Healthcare industries. 📊 WHY CLIENTS CHOOSE US: • 3.5M+ IoT devices connected in production (Geeni smart home ecosystem) • 10+ years building IoT products, from PoC to mass production • 599+ hours on active firmware contract (Zephyr RTOS, Nordic, BLE) • AI-powered development: agentic pipelines, intelligent automation, ML integration for IoT • HIPAA-certified team for medical IoT projects • Top Rated Plus, 100% Job Success Score 🔧 WHAT WE BUILD: → Firmware Development: Zephyr RTOS, FreeRTOS, ESP32, STM32, NRF, ARM Cortex. SPI, UART, I2C, Modbus, GPIO → Wireless Connectivity: BLE 5.3, Matter, Thread, Zigbee, LoRa, MQTT, LTE-M, NB-IoT, WiFi → IoT Cloud Platforms: AWS IoT Core, Azure IoT Hub, Google Cloud IoT, Firebase, InfluxDB → AI & ML for IoT: predictive maintenance models, anomaly detection, sensor data pipelines, edge AI, agentic workflows → Mobile IoT Apps: React Native, Flutter, Swift, Kotlin — companion apps for connected devices → Security & Compliance: TLS, OAuth2, JWT, Secure Boot, OTA updates, HIPAA compliance 🤖 AI ENGINEERING: We integrate AI across the full IoT stack — from edge inference on embedded devices to cloud-based ML pipelines. Our team builds agentic AI systems, intelligent automation workflows, and enterprise-grade AI pipelines that go beyond simple chatbots into production-ready infrastructure. 🏗 INDUSTRIES WE SERVE: • Smart Home — built app ecosystem for 3M+ devices (smart bulbs, cameras, sensors, switches) • Automotive — OBD-II fleet management, connected car platforms, predictive maintenance • Energy — Smart Grid management, EV charging, HVAC telematics with cellular IoT • Healthcare IoT — ECG monitoring wearables, Remote Patient Monitoring (RPM), HIPAA-compliant platforms 👥 TEAM: I lead a dedicated team of 20+ engineers: embedded/firmware, AI/ML, mobile (iOS + Android), backend, QA, DevOps, and project management. We work as your extended engineering team — same timezone overlap, daily standups, transparent communication. 💬 MESSAGE ME with your IoT or AI project details — I'll respond with relevant case studies and a preliminary architecture within 24 hours.
$17/hr
100% Job Success
Offers consultations
Start of list.
End of list.
A.I Project: bit.ly/raza-ai Game / App / Software Development: bit.ly/games-raza LinkedIn Profile: bit.ly/LinkedIn-raza ---------------------------------------------------------- Greetings, I hope you are doing great. My name is Ammad Raza. I am a Senior Software Engineer with 12+ years of professional experience in Unity, WebGL, full-stack software development, and technical leadership. I help companies design, build, and scale high-performance games and applications with a strong focus on architecture, optimization, and long-term maintainability. Education • BSc in Software Engineering (Games & Application Development) (Australia) • MSc in Software Engineering (Project Management and IT solutions) (France) Core Expertise • Unity development for WebGL, iOS, Android, desktop, AR, and VR • WebGL games and interactive applications • Full-stack development including frontend, backend, databases, and APIs • Software architecture and scalable system design • Multiplayer systems and real-time applications • Blockchain and crypto wallet integrations • AR and VR applications for training, simulation, and gaming • Website development and cloud-based platforms Roles I Can Take On • Senior Software Engineer • Unity and WebGL Developer • Software Architect • Team Lead or Technical Lead • Project Developer or Project Manager • Tool and SDK Developer • Backend and API Developer Key Achievements • Developed two successful children’s games: Wisdom World of Emotions and SoftKids • Delivered 19 WebGL and mobile blockchain games for Prism • Led an Australian team to win a USD 50K XRPL grant for an AR blockchain treasure hunt game • Built a large-scale Open World WebGL prototype Preview link: open-world-611aa.web.app • Built a fun Ludo game prototype Preview link: forbidinfruit-77e3e.web.app • Developed a VR training simulation for the French Healthcare department • Collaborated with Zoom Inc. on a multiplayer VR simulation for an F1 pit-stop experience • Recognized as a Top Skilled C# Developer at Proxify What You Can Expect • Clean, scalable, and maintainable code • Strong problem-solving and ownership mindset • Clear communication and realistic project planning • Ability to support both technical and non-technical stakeholders • Long-term thinking with reusable systems and tools • Reliable delivery with focus on performance and quality Best Regards, Ammad Raza
Yulian B.
$60/hr
100% Job Success
$90K+ earned
Offers consultations
Start of list.
End of list.
🚀 Senior Software Engineer | Team Leader | iOS, macOS, visionOS, watchOS | Swift, Objective-C, C++ | AR, AI 🔹 11+ Years of Experience | Master's in AI & Bachelor's in CS | PhD Researcher in Applied Linguistics Passionate software engineer with 11+ years of professional experience in developing high-quality applications for iOS, macOS, visionOS, Windows, and Linux. I specialize in Swift, C, C++, Objective-C, Objective-C++, and Rust programming languages building efficient, scalable, and maintainable solutions. Holding a Master’s degree in Artificial Intelligence and currently pursuing a PhD in Applied Linguistics, where I research OCR for handwritten texts, I bring a unique combination of AI, NLP, and software engineering expertise to projects involving text recognition and automation. 🛠 Tech Stack & Expertise 🔹 Programming Languages 💻 Swift | Objective-C | Objective-C++ | C++ | C | Rust 🔹 Development Tools 🔧 Xcode | Instruments | Terminal | Qt Creator | MS Visual Studio | VS Code 🔹 Architectures & Design Patterns 📐 MVC | MVVM | MVVM+Coordinator | VIPER | TCA | UDF 🔹 iOS/macOS Frameworks & Technologies 📱 UIKit | SwiftUI | Combine | Observation | AVFoundation | CoreFoundation | CoreGraphics | CoreData | CoreBluetooth | CoreLocation | MapKit | PushKit | CallKit | WidgetKit | XCTest | SPM 🔗 Third-party: Realm | RxSwift | SQLite | Alamofire | WebRTC | Twilio | Vonage | Firebase | AWS | Stripe | Google Maps | MapBox | Cocoapods | CarPlay | SiriKit 🔹 Networking & Communication 🌐 TCP/IP | OSI | REST API | GraphQL | WebSockets | VOIP | WebRTC 🔹 Databases & Storage 🗄 MySQL | SQLite | CoreData | SwiftData | Realm 🔹 C++ Libraries ⚙ Qt | Boost | STL 🔹 Scripting & Automation 📜 Bash | Fastlane 🔹 Operating Systems 📂 iOS | macOS | visionOS | watchOS | Android | Windows | Linux (Ubuntu, CentOS) 🔹 CI/CD & Version Control 🔄 Git | GitFlow | SVN | Jenkins | TestFlight | Fastlane | CircleCI | Github actions 🔹 Project Management & Collaboration 📌 JIRA | Trello | Redmine 🔹 UML & Software Design 📊 UML diagrams for system architecture 🔹 Languages 🗣 Ukrainian (Native) | English (Fluent, C1 - CAE Certified) I’m excited to collaborate on challenging projects and build innovative software solutions. Let’s discuss how I can help bring your vision to life! 💬 Let’s Connect!
Associated with
key2advantage
Darshan S.
$14.5/hr
100% Job Success
$100K+ earned
Available now
Start of list.
End of list.
Senior iOS & Android Developer Native Swift, Kotlin & AI-Powered Apps | 18+ Years | 100% JSS 👋 Hi, I am Darshan a Senior Mobile App Developer with 18+ years of experience building high-performance, scalable, and production- ready native iOS and Android applications. With a 100% Job Success Score, 30+ apps delivered, and 18 years at Deftsoft, I help startups and businesses turn ideas into powerful mobile products that are fast, secure, and built to scale from initial concept through to App Store and Google Play deployment. My focus is not just development — I build complete, polished mobile experiences using Swift, Kotlin, Flutter, and React Native, with AI-powered features, real-time audio/video, and clean architecture that other developers are happy to maintain and build on. ───────────────────────────────────────── 📱 𝗪𝗵𝗮𝘁 𝗜 𝗕𝘂𝗶𝗹𝗱 𝗙𝗼𝗿 𝗬𝗼𝘂 ───────────────────────────────────────── I help startups and businesses build: ✔ Native iOS Apps : Swift & SwiftUI, clean MVVM architecture ✔ Native Android Apps : Kotlin & Jetpack, Material Design ✔ Cross-Platform Apps : Flutter & React Native ✔ AI-Powered Mobile Features : OpenAI API & ML integration ✔ Real-Time Chat & Audio/Video : Firebase, Twilio & Agora ✔ Payment Integrations : Stripe, Razorpay, Apple Pay & Google Pay ✔ GPS & Location Services : Google Maps & real-time tracking ✔ Custom Animations & UI/UX : pixel-perfect, fluid interactions ✔ App Store & Play Store Deployment : full compliance & publishing ───────────────────────────────────────── 🔧 𝗖𝗼𝗿𝗲 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸 ───────────────────────────────────────── Mobile Development ✔ iOS : Swift, SwiftUI, Objective-C, Core Data, Core Animation ✔ Android : Kotlin, Java, Jetpack, MVVM, MVC ✔ Cross-Platform : Flutter, Dart, React Native ✔ Architecture : MVVM, MVC, Clean Architecture Backend & APIs ✔ REST APIs, GraphQL & Firebase ✔ Node.js & backend API integration ✔ Twilio & Agora : real-time audio/video ✔ OpenAI API & ML solutions Deployment & Tools ✔ Apple App Store & Google Play compliance ✔ Firebase Analytics & Crashlytics ✔ In-app purchases & subscription billing ✔ Push notifications : FCM & APNs ───────────────────────────────────────── 🏆 𝗣𝗿𝗼𝘃𝗲𝗻 𝗥𝗲𝘀𝘂𝗹𝘁𝘀 ───────────────────────────────────────── ✔ 18+ years of native iOS & Android development ✔ 100% Job Success Score on Upwork ✔ 30+ production-ready apps delivered ✔ humNET Swift iOS Social Connection App shipped & live ✔ FitQuest React Native Fitness Gamification App shipped & live ✔ Kotlin Kids Piano Learning App shipped & live ✔ Healthcare, social networking & fitness apps with 5-star reviews ───────────────────────────────────────── 💡 𝗪𝗵𝗮𝘁 𝗬𝗼𝘂 𝗖𝗮𝗻 𝗘𝘅𝗽𝗲𝗰𝘁 ───────────────────────────────────────── ✔ Clean, scalable & well-documented code every time ✔ Fast, clear communication & reliable delivery ✔ Native-quality performance on both iOS & Android ✔ AI-first thinking intelligent features built in from day one ✔ Long-term support & continuous improvement after launch ✔ One developer who owns the full mobile build start to finish ───────────────────────────────────────── 🌐 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗲𝘀 𝗜 𝗦𝗲𝗿𝘃𝗲 ───────────────────────────────────────── ➢ Healthcare & Telemedicine ➢ Fitness & Wellness Apps ➢ Social Networking & Community Platforms ➢ E-Commerce & Marketplace Apps ➢ FinTech & Banking Apps ➢ Food Delivery & Restaurant Solutions ➢ Ride-Hailing & Logistics Apps ➢ Travel & Hospitality Platforms ➢ Education & E-Learning Apps ➢ Event Management & Booking Systems ➢ Real Estate & Property Tech ➢ SaaS Platforms & Business Tools ➢ Smart Home & IoT Applications ───────────────────────────────────────── 🤝 𝗛𝗼𝘄 𝗜 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗬𝗼𝘂 ───────────────────────────────────────── 1️⃣ Discovery : understand your app idea & technical requirements 2️⃣ Architecture : design clean iOS/Android structure & tech stack 3️⃣ Development : sprint-based delivery with regular progress updates 4️⃣ Testing : fully tested across devices & OS versions before release 5️⃣ Launch : App Store & Play Store deployment ───────────────────────────────────────── 🚀 𝗟𝗲𝘁'𝘀 𝗕𝘂𝗶𝗹𝗱 𝗬𝗼𝘂𝗿 𝗔𝗽𝗽 ───────────────────────────────────────── Whether you need a full native iOS or Android app from scratch, cross-platform Flutter or React Native development, AI-powered mobile features, or feature upgrades to an existing app I am ready to take ownership of the build from day one. 👉 Send me a message and let's discuss your idea. I respond quickly and I am happy to jump on a call first if that's easier.
Deftsoft
Associated with
Deftsoft
$10M+
earned
Andrii P.
$55/hr
100% Job Success
$70K+ earned
Available now
Offers consultations
Start of list.
End of list.
Experienced in: 1. Computer vision • C++, Python, OpenCV, CUDA, Git, Linux, Qt, Boost, OpenGl, PCL, Strong math background, Neural Networks - road segmentation for unmanned vehicles (ENet, Caffe, OpenCV, C++, Linux) - car tracking (Yolo v3, OpenCV, C++, Linux) - wagon number identification (Yolo v4, Python) - implementation of real time 360°/perspective camera transformation on Cuda (C++, Cuda, OpenCV, Linux, Jetson Nano) - distance calculation to point on 2D camera frame (C++, OpenCV, Linux) - automate grading system for handwritten answer sheets (computer vision part, OpenCV, Java, Android Key stack: Linux, C++ (Qt), Python, Java, OpenCV, Yolo (darknet) 2. Machine Learning Machine learning research projects in the following domains: - person segmentation (ModNet, RVM, TDNet, UCTransNet, XMem etc.) - image inpainting (Pen-Net, Deepfillv2, Shift-Net, ViNet etc.) - image upscale (RDN, RRDN, Stable Diffusion, ISR etc.) - image relighting (Total Relighting, DPR, RelightNet etc.) - road segmentation for unmanned vehicles (ENet, Caffe, OpenCV, C++, Linux) - car tracking (Yolo v3, OpenCV, C++, Linux) - wagon number identification (Yolo v4, Python) - implementation of real time 360°/perspective camera transformation on Cuda (C++, Cuda, OpenCV, Linux, Jetson Nano) - distance calculation to point on 2D camera frame (C++, OpenCV, Linux) - automate grading system for handwritten answer sheets (computer vision part, OpenCV, Java - Android, IOS - Swift) Key stack: Linux, Python, Pytorch, Tensorflow, OpenCV, Pillow, Numpy, C++, CUDA, Darknet, SegNet 3. Robotics and Embedded development: - OCPP Protocol, Linux, Modbus, Raspberry Pi, CAN; -ROS Robot operating system; - Skilled in SLAM, localization, mapping - Experienced in path planning algorithms, obstacle avoidance, holonomic, and non-holonomic motion planning, trajectory planning for robotics arms; - Used to work with Bayesian/Kalman filters, and sensor fusion (LiDAR, IMU, Visual, Odometry, Radar, GPS). 4. Android development (Kotlin, Java, Android Studio, Eclipse, Firebase). Has expert colleagues in: • .Net Framework (C#, VB.Net, ASP.Net, .Net Core, WPF, UWP,WCF, ADO.Net) • Java (j2se, j2ee, servlets, java beans, Maven) • JavaScript (Node.JS, Express.js, Vue.js, Element.js, Angular.js, D3.js) • C++ (TCP/IP, HTTP, HTTPS, WebSocket, Modbus) • Python (MAVLink, WebSocket) • Step7 (S7 Communication, OCPP, Modbus, CANOpen, ProfiNet) Database • PostgreSQL • MySQL • MongoDB • Microsoft SQL • Oracle Database • Neo4J Software development for mobile platforms • Crossplatform React Native, Flutter, Xamarin, • Android (Kotlin, Java, Android Studio, Eclipse) • iOS (Objective C, Swift) Mobile apps development: • Crossplatform: Futter, React Native, Xamarin. • Android (Java, Kotlin) • iOS (Objective C, Swift) 1. Native Development - Kotlin/Java - Swift / Objective-C - iOS/macOS/tvOS/watchOS - Firebase, CloudKit, Coredata 2. Cross-Platform and Hybrid App Development - React Native/React - Flutter / Dart - Xamarin.iOS / Xamarin.Android / Xamarin.Forms tech stack ● Android Studio, Gradle, Kotlin DSL, KSP ● Kotlin, Java programming languages ● AndroidX, Android Jetpack libraries, Android Architecture Components ● Jetpack Compose ● Material Design Components ● Clean Architecture, SOLID design principles ● MVVM, MVI, GoF design patterns ● Modularization (multi-module projects) ● Kotlin Coroutines + Flow, RxJava, RxBinding ● REST API / Networking - OkHttp, Retrofit 2, Socket IO ● Room Database, SQLite, Datastore ● Kotlinx Serialization, Protobuf, Moshi, Gson ● Dependency Injection (Hilt, Dagger 2, Koin) ● Git ● Firebase Products, Google Cloud APIs, HMS Services ● Admob, Google Play Billing Library (in-app purchases), Samsung/Huawei IAP ● Unit / Instrumented (UI) tests ● Agile Scrum development methodology ● CI/CD (GitHub Actions) AR/VR: Vuforia ARkit/ARcore/AR Foundation Wikitude Oculus Integration OpenXR XR Interaction toolkit VR Walkthrough UltimateXR VR Interaction Framework Hardware expert: • Nvidia Jetson Nano, TX2, Xavier; • Raspberry Pi; • Arduino, STM32; • Depth cameras Intel Realsense d435i , Zed Sterelabs. • Lidars, Radars. Charging stations for the Electric Vehicles development software for the managing stations and networks (server and user applications): • C#, SQL, PostgreSQL, .Net Core, REST Api, WebSockets • OCPP Protocol, Linux, Modbus, Raspberry Pi Software development • .Net Framework (C#, VB.Net, ASP.Net, .Net Core, WPF, UWP,WCF, ADO.Net) • Java (j2se, j2ee, servlets, java beans, Maven) • JavaScript (Node.JS, Express.js, Vue.js, Element.js, Angular.js, D3.js) • C++ (TCP/IP, HTTP, HTTPS, WebSocket, Modbus) • Python (MAVLink, WebSocket) • Step7 (S7 Communication, OCPP, Modbus, CANOpen, ProfiNet) Database • PostgreSQL • MySQL • MongoDB • Microsoft SQL • Oracle Database • Neo4J
Andrii P. has worked .
Sagarkumar S.
$16/hr
100% Job Success
$300K+ earned
Available now
Start of list.
End of list.
Are you looking for a Mobile app developer who can design and develop your app for the next millions of users? ARE YOU - Looking for a mobile app development service starting from the design, development to release and publish a mobile app to Play Store and App Store for mobile app users/customers. - Looking for a mobile app developer who can integrate new features into your existing Android app, iOS app or Flutter app based projects? - Individual | Big company | Startup who wants to build and create Android app or iOS app from scratch? - Looking for a mobile app developer who can transform your idea into reality? - Someone who invests in the best so you get better results? If any of that is what you need, message me and I am here to help you. Who am I? - I'm Sagarkumar Surani, a Senior Mobile App Developer with 10+ years of experience and a Master’s degree in Computer Science and Engineering. - I worked with big brands, startups and individuals to create mobile apps for their requirements. My work also got featured a few times in the market store. Apps developed by me have 100 million+ downloads on store and users love to keep the app on their phone as a permanent app. - I’ve worked with clients from over 40 countries, such as the USA, UK, Germany, India, and Australia, which has given me a strong understanding of different international markets. My experience covers a variety of industries, including Travel and Tourism, train ticket booking, transport, educational, hospitality, health & wellness, real estate, live streaming, Marketplace, food & delivery, human resources, fitness, financial & banking sectors, e-commerce, dating, sports, Betting, music/audio, and automotive. I specialize in these high-quality Mobile App Design and Development areas: - Android app development - Kotlin, Java, Android SDK, Android Studio - iPhone app development - Swift, SwiftUI, Objective C, iOS SDK, Xcode - Backend Development | Node.js - Cross Platform Mobile App Development using Flutter, Dart - UI/UX: Mobile design - Mobile & Web app design - UX/UI design - Landing page design Skills : - Have experience developing, releasing & maintaining applications as a Mobile app developer - Strong skills in executing pixel & animation perfect UI's relative to good app performance - Have great communication skills and ability to work with your team - Have a great understanding of MVC, MVP, MVVM and take great care to ensure each project is well-architecture with best practices and easily maintainable so it can be enhanced as feature grows. - The ability to take initiative and work independently with very little supervision - Application requirement analysis - Translating requirements to technical languages In addition to Mobile app development services, my topic areas of expertise include: - Mobile Application Architect - Native Mobile Application Development consultation - Mobile Application UI/UX design using Figma, Adobe XD - Mobile Application backend services Firebase, AWS Mobile Hub - Mobile Application backend development: Node, Express, TypeScript, JavaScript, MongoDB, MySQL, PHP, RESTful API development, Google App Engine - Website development, Web Scraping, Web Admin Panel, CMS Development - Chatbot development, Facebook Messenger If you still think this is right for you, contact me. Thank you in advance for your time and consideration. Kind Regards Sagarkumar Surani P.S. - When you work with me your satisfaction is 100% guaranteed. - Every person who ever worked with me got results. EVER! - Even if you don’t hire me now, keep my profile link in case you need a Mobile App Developer later. FAQ Q: Can you provide maintenance support after development? A: Yes, I provide free of cost maintenance support for 12 months after mobile app development. Q: Can you help with Mobile app design? A: Yes, I offer a Mobile app UX design as an additional service. Q: Can you help with the landing page website for my mobile app product? A: Yes, I can help to build the landing page for a mobile app product. Warmly, Sagarkumar Surani ----------------------------------------------------- Native Android App Developer, iOS App Developer, Cross-Platform Flutter App Developer, Top Flutter Developer, React Native, Hire Best MERN Stack Developer, RESTful API Developer, API Integration, Frontend Developer, React.js, Backend Developer, Nodejs, Javascript, Figma, UI/UX Design, Prototype, In-app purchases, Location, Payment Gateway Integration, Apple Xcode, Android Studio, Push notifications, User authentication, User profile creation, QA, Unit Testing, Regression Testing, Dating App, Ecommerce App, RevenueCat, Adapty, 3rd Party SDK Integration, SQLite, MySQL, Firebase Cloud Firestore, Realtime Database, Kotlin, Swift, Java, Dart, SwiftUI, Twilio, Mapbox, HealthKit, Google Analytics, Amazon Web Services, DigitalOcean, Core Data, UIKit, MapKit, Phone, Full Stack Developer, iPad, OpenAI ChatGPT LLM, ChatGPT API Integration .
Sagarkumar S. has worked .
Sunny C.
$38/hr
100% Job Success
$200K+ earned
Available now
Offers consultations
Start of list.
End of list.
My work covers the complete product lifecycle from transforming ideas into technical roadmaps, architecture planning, UI/UX implementation, backend development, AI integrations, testing, deployment, and long-term scaling support across iOS, Android, Web, and cloud platforms. Over the 15+ years of hands-on experience delivering products for startups, enterprises, agencies, and government-backed initiatives, where I’ve delivered 250+ successful projects for global organizations and brands, including Imagine, RunTheDay, SmartGen, Wishper-AI, Rhubarb-AI, AT&T, Verizon, Univision, Telefonica, Sprint, PepsiCo, Airtel, Amazon, Goldman Sachs, OLX, FountainLife, MySpace, SHL, LetsIntern, AMCAT, and many others. I have also completed multiple impactful projects in collaboration with the European Union and the Government of India. I maintain clear updates throughout development, proactively identify blockers, and adapt to overlapping client time zones to ensure smooth collaboration and predictable delivery timelines. My Technical Expertise: Mobile Development: React Native, Flutter, Swift, Objective-C, Java, Kotlin Backend Development: NodeJS, PHP, Laravel, Python, Java, Dot NET, REST APIs, Firebase Databases: PostgreSQL, MySQL, MongoDB, SQLite, Core Data, Firestore Cloud & Infrastructure: AWS, Firebase, GCP, Supabase Payments & Secure Transactions: Stripe, Braintree, Apple Pay, Google Pay, Razorpay Realtime & Communication: Firebase, SignalR, Twilio, QuickBlox CI/CD & DevOps: AWS, Azure, GCP, Kubernetes, GitHub Actions, GitLab CI, Jenkins, CircleCI, Supabase, DigitalOcean Cross-Platform & No-Code Ecosystem: FlutterFlow, Adalo, Figma-to-Production Workflows AI Tools & Platforms: OpenAI APIs, Claude AI, Cursor AI, GitHub Copilot, LangChain, Pinecone, Hugging Face, Vercel AI SDK, N8N, Make dot com, Zapier, Firebase AI Integrations AI & Automation: AI Chatbots & Conversational Systems, LLM Integrations (OpenAI, Claude, Gemini), AI Recommendation Systems, Speech-to-Text & Text-to-Speech, AI Workflow Automation, RAG-based AI Systems, AI Agents & Autonomous Workflows, Prompt Engineering, AI-powered Analytics & Personalization, Document Parsing & OCR Systems, Process Automation using N8N IoT & Smart Device Integrations: BLE & Wi-Fi Devices, OBD-II Integrations, Apple Watch & Fitness Devices, Beacon Technologies (iBeacon, BlueCat) Security & Compliance: OAuth2, PKI, Secure Authentication, HIPAA & GDPR Compliance, 128-bit Encryption Standards I’m available for full-cycle product development, AI integration projects, long-term collaborations, technical leadership roles, and scaling existing applications. If you’re building a serious product and need an experienced engineering partner who can combine strong software engineering with modern AI capabilities, I’d be happy to discuss your project.
Sunny C. has worked .
Quokka Labs
Associated with
Quokka Labs
$200K+
earned
Sagar M.
$50/hr
100% Job Success
$200K+ earned
Available now
Offers consultations
Start of list.
End of list.
⚡ 14-Day MVP Delivery – Your production-ready mobile app launched in 2 weeks, not 2 months 🏆 Former Apple iOS Engineer – Silicon Valley standards meet startup speed for investor-ready applications 📱 70+ Apps Launched – Proven track record turning founder ideas into funded businesses on iOS and Android Need Expert Mobile App Development That Actually Delivers on Time? I'm a former Apple iOS engineer offering professional mobile app development for startup founders who need results fast. While other mobile app development agencies take 3-6 months and disappear mid-project, I deliver market-ready MVPs in 14 days or less. No crashes. No excuses. No communication gaps. I've successfully launched 70+ applications across the iOS App Store and Google Play Store through strategic mobile app development. But here's what matters more: I've helped multiple founders turn their ideas into investor-ready apps that secured real funding. One client came to me after their previous mobile app development team ghosted them 3 months into the project. They had an investor meeting in 2 weeks and nothing to show. I rebuilt their entire native app from scratch in 13 days using React Native. The app worked flawlessly in their pitch. They closed $500K in seed funding. That's the difference between a developer who codes and a developer who understands your real goal isn't just an app – it's launching your business before competitors beat you to market. I use test-driven mobile app development methodology with enterprise-grade architecture, so your app doesn't just work on day one. It scales as your business grows. You get weekly progress builds for continuous feedback, and I respond to messages within hours, not days. No more chasing developers who went silent. Whether you need iOS development, Flutter development, or cross-platform solutions with React Native, my mobile app development services deliver apps that look professional, function perfectly, and stay within your budget. No surprise costs. No endless revisions. Just a clear timeline and a finished product that's ready to make you money. Mobile App Development Services: - iOS App Development (Swift, native iOS development) - React Native Development (cross-platform iOS & Android apps) - Flutter Development (modern, scalable mobile applications) - MVP Development (investor-ready apps in 14 days) - Mobile App Design (professional UI/UX that converts) - App Store & Google Play Deployment (end-to-end launch support) Ready to Launch Your App Fast? If you're tired of mobile app development projects that drag on for months, developers who disappear, or apps that crash when you need them most – let's talk. Send me a message with your project details, and I'll show you exactly how my proven mobile app development process can get your app built, tested, and launched in 14 days. Every successful mobile app development project starts with a conversation. Your competitors aren't waiting. Neither should you.
BrewApps LLC.
Associated with
BrewApps LLC.
$30/hr
100% Job Success
$50K+ earned
Offers consultations
Start of list.
End of list.
I bring 11+ years of experience in Mobile and Web Development, specializing in backend PHP/Laravel systems and native mobile apps using Kotlin, Swift, Objective-C, and Java. I build scalable, secure, and high-performance solutions tailored to your business needs. Our Agency Since 2016, my dedicated team and I have delivered top-quality digital solutions worldwide. ✔️ 150+ apps and platforms launched in the last year ✔️ $500K+ earned on Upwork ✔️ 122+ projects completed, 9,500+ hours logged ✔️ Nearly 100% client satisfaction ✔️ Experience working with startups and 7-9 figure enterprises My Expertise Backend & Web Development • PHP (Laravel, Symfony), MySQL, PostgreSQL, REST APIs, OAuth2, JWT Mobile App Development • Native Android (Java, Kotlin), iOS (Swift, Objective-C) • Cross-platform and API integrations Cloud & DevOps • AWS, Docker, CI/CD pipelines, scalable infrastructure Security & Authentication • Secure user authentication, SSO, role-based access control Why Work With Us? ✅ Custom solutions aligned to your goals and budget ✅ Agile development with clear milestones and communication ✅ Robust, well-tested, and maintainable code ✅ Competitive pricing with no surprises ✅ Proven success across fintech, eCommerce, logistics, and more Industries Served Finance, HealthTech, Logistics, E-commerce, SaaS, Real Estate, and more. What Clients Say "Fast, reliable, and communicative — delivered exactly what we needed on time." – Alexey Levashev, ZOOM International 𝗪𝗼𝘂𝗹𝗱 𝘆𝗼𝘂 𝗯𝗲 𝗮𝘃𝗮𝗶𝗹𝗮𝗯𝗹𝗲 𝗳𝗼𝗿 𝗮 𝟑𝟎-𝟔𝟎 𝗺𝗶𝗻𝘂𝘁𝗲 𝗳𝗿𝗲𝗲 𝗰𝗼𝗻𝘀𝘂𝗹𝘁𝗮𝘁𝗶𝗼𝗻? During this meeting, we will: ✔️ Discuss your project goals, challenges, and priorities ✔️ Outline a clear roadmap and cost estimate ✔️ Identify the best tech approach for your vision Send me a message to schedule your session. Looking forward to building something great together! Best regards, Stas
ThriveIO  thrive.io
Associated with
ThriveIO thrive.io
$500K+
earned