I build multiplayer games and interactive 3D applications in Unity and Unreal Engine. 10+ years in software, $100K+ earned on Upwork across 52 contracts, Top Rated Plus. Games I have worked on: • Pixelmon Arena, a team based multiplayer fighting game with custom networking for real time 2v2 to 4v4 matches, ranking, and character customization, in my portfolio below • TCG World, an open world multiplayer game on Steam with wallet login and persistent leaderboards • Warriors of Nova Thera and Glyph Bound: Kotodama, open world and tactical PvP RPG projects with combat, progression, and guild systems • Scamper, a PCVR title shipped on Steam and Meta Quest • Mobile and browser games across puzzle, board, and casual genres, several shipped for repeat clients you can see in my work history Multiplayer is my core strength, Photon, Mirror, and Netcode, lobbies, matchmaking, state sync, and the low latency player feedback that decides whether an online game feels good or laggy. Beyond games I have built VR training and simulation applications, so headset work is familiar ground too. I have also worked as a Product Owner and certified Scrum Master, so on larger projects I can run the process, not just write the code, sprint planning, backlog, and clear communication with stakeholders. Stack: Unity, Unreal Engine, C#, Photon, Mirror, Netcode, WebGL, Meta Quest, AR Foundation, Firebase, PlayFab, REST APIs. If you are building a multiplayer game, a game prototype, or need a senior developer to take over an existing Unity or Unreal codebase, tell me what you are building and I will show you the closest thing I have shipped.

Top Rated Plus iOS engineer specialising in AR/BIM overlay applications — bringing Revit, IFC, and LiDAR data into ARKit for architecture, construction, and AEC software companies. $70K+ delivered on Upwork across 7+ years. WHAT I DO BEST ▸ AR/BIM overlay applications — load IFC and Revit-exported models on iOS, extract zones and floorplans, align them to the real world via ARKit. ▸ ARKit development — Scene Reconstruction, World Tracking, Geo Anchors, LiDAR-based depth and occlusion, RealityKit. ▸ iPhone/iPad LiDAR to CAD pipelines — capture with iOS LiDAR, mesh and point cloud processing, 3D model generation, CAD-ready output. Currently delivering this for a multi-site retail client. ▸ Native iOS development — Swift, SwiftUI, RealityKit, UIKit, Combine DEEP TECHNICAL EXPERTISE ▸ ifcopenshell on iOS for fully offline on-device IFC parsing. ▸ Diagnosing real-world Revit export quality issues: stair misclassification, multi-storey assignment errors, duplicate IfcBuilding entities ▸ Strategy-pattern elevation resolution for IFC: slab → storey → wall → space, with confidence scoring ▸ Point cloud processing, mesh extraction, scale alignment ALSO IN THE STACK Firebase (Auth, Firestore, Cloud Functions, FCM) · AWS (Amplify, AppSync, Pinpoint) · Stripe · Fastlane CI/CD · MapKit · Google Maps SDK · Python (ifcopenshell, mesh processing) HONEST SCOPE NOTES My LiDAR pipeline is built around iPhone/iPad LiDAR as the capture device. If you're working with terrestrial scanners (Leica BLK, FARO, Matterport Pro), the post-processing is different, open to explore and help you there as well. HOW I WORK Based in Ahmedabad, Gujarat, India. Comfortable with US, EU, UK, Middle East, and APAC time zones. Async-first, Slack/Loom for status updates, clear written scoping before any estimates. I respond to messages within a few hours during business hours. LET'S TALK IF You're an architect, AEC software company, construction tech startup, or product team that needs an iOS engineer who already understands BIM, IFC, ARKit, and the messy realities of getting real-world geometry onto a phone or into a Vision Pro headset. Send me your project requierments — happy to do a 30-minute scoping call to see if we're a fit.

We Can help you: ★ Product Design & Development 🔸 Create the architecture of your next mobile app using React Native and Flutter 🔸 A to Z app design and development 🔸 Set up a development team and delivery processes 🔸 Review the quality of the code 🔸 Help to find bottlenecks on the technologies side for the rapid growth of your product 🔸 Consultancy to make app GDPR, HIPAA, and MDR compliant ★ Software testing 🔸 QA Audits and Assessments 🔸 QA Staffing 🔸 Dedicated QA team 🔸 Managed testing 🔸 Mobile app testing 🔸 Web app testing 🔸 DevOps Hi 👋 my name is Liudmyla Dziubynska, and I am a professional software engineer with more than 8+ years of experience creating custom high-load platforms and applications. Since 2017, I have been leading a team of software development engineers with deep expertise and focusing on developing custom cross-platform and web applications using: 🔹 Javascript & TypeScript 🔹 ReactJS 🔹 React Native 🔹 Flutter 🔹 NodeJS (NestJS, Express) Our developers not only pay attention to technical aspects, but we also have experiences in business domains, such as: 🔸 HealthCare 🔸 FinTech 🔸 Logistics 🔸 SaaS solutions 📌 What value we can bring: • Technical risk management. We care about the technical edge cases of the product to avoid any data breaches or fines in the future • Direct communication with the whole team and transparent cooperation • Solid processes in development, testing, and product delivery • Flexible working with the various time zones 📌 Key information about ZenBit Tech: • Delivery software development services since 2017 • ISO13486 certified • Headquarters and R&D in Eastern Europe with the sales office in the UK • Participating in and committed to the IT community (IT hubs, organizing local events, meetings, etc.) 🤔 Interesting in building a scalable and successful product? I would be happy to share my experience and provide you with a solution!

𝗨𝗡𝗜𝗧𝗬 | 𝗦𝗪𝗜𝗙𝗧 | 𝗞𝗢𝗧𝗟𝗜𝗡 | 𝗙𝗟𝗨𝗧𝗧𝗘𝗥 | 𝗥𝗘𝗔𝗖𝗧 𝗡𝗔𝗧𝗜𝗩𝗘 | 𝗠𝗢𝗕𝗜𝗟𝗘 𝗔𝗣𝗣 & 𝗚𝗔𝗠𝗘 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗘𝗥 𝗦𝗣𝗘𝗖𝗜𝗔𝗟𝗜𝗭𝗜𝗡𝗚 𝗜𝗡 𝗔𝗡𝗗𝗥𝗢𝗜𝗗 & 𝗜𝗢𝗦 𝗔𝗣𝗣𝗦 Rewarded as 🏆 𝗧𝗢𝗣 𝗥𝗔𝗧𝗘𝗗 🏆 by Upwork (𝗧𝗢𝗣 3%) 7,187+ 𝗛𝗢𝗨𝗥𝗦 104+ 𝗝𝗢𝗕𝗦 𝗖𝗢𝗠𝗣𝗟𝗘𝗧𝗘𝗗 𝗦𝗨𝗖𝗖𝗘𝗦𝗦𝗙𝗨𝗟𝗟𝗬 100% 𝗝𝗢𝗕 𝗦𝗨𝗖𝗖𝗘𝗦𝗦 𝗦𝗖𝗢𝗥𝗘 (Client Satisfaction Ratio) 𝗛𝗜𝗚𝗛-𝗤𝗨𝗔𝗟𝗜𝗧𝗬 𝗪𝗢𝗥𝗞 𝗕𝗨𝗗𝗚𝗘𝗧-𝗙𝗥𝗜𝗘𝗡𝗗𝗟𝗬 𝗙𝗟𝗨𝗘𝗡𝗧 𝗘𝗡𝗚𝗟𝗜𝗦𝗛 ⭐⭐ ⭐ ⭐ ⭐ 𝗖𝗟𝗜𝗘𝗡𝗧 𝗥𝗘𝗩𝗜𝗘𝗪 “I worked with Muhammad Ali for many years. I highly recommend working with him. He is well organized, highly efficient, follows instructions carefully, and produces excellent results. If he doesn’t know something, he will find a way to solve it. In fact, there was no task he could not complete. It was always a pleasure to work with him. He has a positive and professional attitude toward the projects.” I'm a Top-Rated Mobile App and Game Developer with 15+ years of experience building and optimizing mobile, PC, and web games. I help clients create high-quality 2D and 3D games for iOS, Android, PC, and Web, with a strong focus on performance optimization, bug fixing, feature development, smooth gameplay, and polished delivery. My expertise includes Unity game development, where I work on gameplay systems, game mechanics, UI, optimization, lighting, shading, monetization, backend integrations, and release support. I also have solid experience in iOS development and Android development for app and game projects. I am known for: • Fast execution • Clear communication • Strong problem-solving • Reliable delivery • High-quality results I treat every client's project like my own and always focus on building stable, scalable, and successful products. I have successfully delivered apps and games that Apple has featured. My services include: • Unity Game Development • 2D Game Development • 3D Game Development • Mobile Game Development • PC Game Development • Web Game Development • Game Optimization • Performance Optimization • Bug Fixing • Feature Development • C# Scripting • Gameplay Systems • UI Implementation • Lighting and Shading • Batching and Draw Call Optimization • Firebase Integration • PlayFab Integration • Photon Multiplayer Integration • AWS Integration • Monetization SDK Integration • I2 Localization • Google Maps Integration • Git Version Control Additional technical skills: • iOS Development — Swift, Objective-C • Android Development — Java, Kotlin • Unity 2D / Unity 3D • Cocos2d / Cocos2d-x • WordPress • Jira, Asana, Trello, Wrike 𝗠𝗼𝗯𝗶𝗹𝗲 𝗔𝗽𝗽 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀: * Flutter Developer * Flutter App Developer * Flutter Mobile App Developer * React Native Mobile App, Developer * Android App Developer * iOS App Developer * iPhone App Developer * Mobile App Developer * Senior Mobile App Developer * Mobile Developer * Hybrid App Developer * Cross-Platform Mobile Developer * Cross-Platform App Development * Mobile App Development * Android Mobile App Development * iOS Mobile App Development * React Native Mobile App Development * Flutter Mobile App Development * Mobile App Redesign * Mobile App Builder AI Mobile App Development: * AI Mobile App Developer * AI App Developer * AI App Development * Artificial Intelligence App Development * AI Solutions for Mobile Apps * Machine Learning App Integration * AI Integration for Mobile Apps Backend, Firebase & API Integration: * Firebase App Developer * Flutter Firebase App Developer * Flutter Mobile App with Firebase * API Integration for Flutter Apps * Flutter Laravel App Development * Backend Integration for Mobile Apps * Third-Party API Integration Industry-Specific App Development: * Dating App Development * Dating Mobile App Development * Food Delivery Mobile App Development * Education App Development * Salon Booking Mobile App Development * Chat Mobile App Development * Chat Buddy Mobile App Development Flutter-Specific Services: * Flutter Developer * Flutter Mobile App * Flutter Mobile App Dart * Flutter Mobile App Firebase * Flutter Laravel * Flutter App Development * Flutter UI Development * Flutter Bug Fixing * Flutter App Optimization If you are looking for a reliable Mobile App Development, Unity developer, mobile game developer, or game optimization expert who can build, improve, and deliver quality work on time, I'd be happy to help.

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

𝗜𝘀 𝘆𝗼𝘂𝗿 𝗽𝗮𝘆𝗺𝗲𝗻𝘁 𝘀𝘆𝘀𝘁𝗲𝗺 𝗰𝗼𝘀𝘁𝗶𝗻𝗴 𝘆𝗼𝘂 𝗺𝗼𝗻𝗲𝘆 𝗮𝗻𝗱 𝗰𝗮𝘂𝘀𝗶𝗻𝗴 𝘀𝗹𝗲𝗲𝗽𝗹𝗲𝘀𝘀 𝗻𝗶𝗴𝗵𝘁𝘀? Let’s turn that stress into success. With over 20 years of experience as a seasoned FinTech leader and Global CTO specializing in 𝗣𝗮𝘆𝗺𝗲𝗻𝘁 𝗚𝗮𝘁𝗲𝘄𝗮𝘆 𝗜𝗺𝗽𝗹𝗲𝗺𝗲𝗻𝘁𝗮𝘁𝗶𝗼𝗻, 𝗔𝗣𝗜 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻, and 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗽𝘁𝗶𝗼𝗻 𝗛𝗮𝗻𝗱𝗹𝗶𝗻𝗴, a proven track record awaits you. Payment systems have been built and optimized to not only meet today's demands but also scale with your business tomorrow—delivering over 𝗨𝗦𝗗 𝟮𝟬𝗠 𝗶𝗻 𝗿𝗲𝘃𝗲𝗻𝘂𝗲 𝗳𝗼𝗿 𝟭𝟬+ 𝗰𝗼𝗺𝗽𝗮𝗻𝗶𝗲𝘀 and powering 200+ successful app launches worldwide. 𝗪𝗵𝗮𝘁 𝗜 𝗕𝗿𝗶𝗻𝗴 𝘁𝗼 𝘁𝗵𝗲 𝗧𝗮𝗯𝗹𝗲: 𝟭. 𝗘𝘅𝗽𝗲𝗿𝘁 𝗣𝗮𝘆𝗺𝗲𝗻𝘁 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀: Mastery in integrating 𝗦𝘁𝗿𝗶𝗽𝗲, 𝗦𝘁𝗿𝗶𝗽𝗲 𝗖𝗼𝗻𝗻𝗲𝗰𝘁, and other payment gateway APIs, ensuring secure, efficient, and scalable payment systems. 𝟮. 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗽𝘁𝗶𝗼𝗻 & 𝗧𝗿𝗮𝗻𝘀𝗮𝗰𝘁𝗶𝗼𝗻 𝗟𝗼𝗴𝗶𝗰: Proven expertise in handling recurring payments, multi-invoice payments, partial payments, and complex scenarios like payment failures, refunds, and voiding transactions. 3. 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗟𝗲𝗮𝗱𝗲𝗿𝘀𝗵𝗶𝗽 & 𝗦𝘁𝗿𝗮𝘁𝗲𝗴𝘆: Adept at leading cross-functional teams, communicating with C-level executives, and transforming technical challenges into robust, revenue-generating solutions. 𝟰. 𝗛𝗮𝗻𝗱𝘀-𝗢𝗻 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲: Whether you’re dealing with broken software systems or planning a complete digital transformation, startups and enterprises alike have seen at least a 𝟭𝟬% 𝗶𝗺𝗽𝗿𝗼𝘃𝗲𝗺𝗲𝗻𝘁 𝗶𝗻 𝗲𝗳𝗳𝗶𝗰𝗶𝗲𝗻𝗰𝘆 𝗮𝗻𝗱 𝗽𝗿𝗼𝗳𝗶𝘁𝗮𝗯𝗶𝗹𝗶𝘁𝘆 through these solutions. 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗘𝘅𝗰𝗲𝗹𝗹𝗲𝗻𝗰𝗲 𝗶𝗻 𝗣𝗮𝘆𝗺𝗲𝗻𝘁 𝗣𝗿𝗼𝗰𝗲𝘀𝘀𝗶𝗻𝗴: Leveraging cutting-edge payment processing protocols — 𝗣𝗖𝗜-𝗗𝗦𝗦 𝗰𝗼𝗺𝗽𝗹𝗶𝗮𝗻𝗰𝗲, 𝘁𝗼𝗸𝗲𝗻𝗶𝘇𝗮𝘁𝗶𝗼𝗻, 𝗲𝗻𝗱-𝘁𝗼-𝗲𝗻𝗱 𝗲𝗻𝗰𝗿𝘆𝗽𝘁𝗶𝗼𝗻, and 𝟯𝗗 𝗦𝗲𝗰𝘂𝗿𝗲 𝗶𝗺𝗽𝗹𝗲𝗺𝗲𝗻𝘁𝗮𝘁𝗶𝗼𝗻𝘀 — ensures sensitive data is safeguarded and fraud risks are mitigated. Expertise in configuring 𝗣𝗮𝘆𝗺𝗲𝗻𝘁 𝗜𝗻𝘁𝗲𝗻𝘁𝘀, 𝗦𝗲𝘁𝘂𝗽 𝗜𝗻𝘁𝗲𝗻𝘁𝘀, and utilizing 𝘄𝗲𝗯𝗵𝗼𝗼𝗸𝘀 for real-time event handling optimizes 𝗦𝗖𝗔 flows, manages decline handling and chargebacks, and ensures seamless reconciliation across multiple payment channels. A deep understanding of card network rules, risk management strategies, and automated dunning processes guarantees that payment operations remain both resilient and highly efficient. 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 𝗶𝗻 𝗜𝗻-𝗔𝗽𝗽 𝗣𝘂𝗿𝗰𝗵𝗮𝘀𝗲 𝗛𝗮𝗻𝗱𝗹𝗶𝗻𝗴: Extensive experience with 𝗶𝗻-𝗮𝗽𝗽 𝗽𝘂𝗿𝗰𝗵𝗮𝘀𝗲 systems on both 𝗚𝗼𝗼𝗴𝗹𝗲 𝗣𝗹𝗮𝘆 and 𝗔𝗽𝗽𝗹𝗲 𝗔𝗽𝗽 𝗦𝘁𝗼𝗿𝗲 platforms complements robust payment gateway integrations. Successfully blending these in-app purchase mechanisms with 𝗦𝘁𝗿𝗶𝗽𝗲 creates a unified payment ecosystem that supports subscriptions, one-time purchases, and cross-platform transactions. Notable projects include 𝗦𝘁𝗿𝗲𝗮𝗺𝗶𝗹𝘆 and 𝗕𝗿𝗮𝗶𝗻𝗧𝗮𝗽, where in-app purchase flows were seamlessly integrated with backend payment processing to optimize revenue and enhance user experience. 𝗛𝗶𝗴𝗵𝗹𝗶𝗴𝗵𝘁𝘀: 𝟭. 𝗚𝗹𝗼𝗯𝗮𝗹 𝗜𝗺𝗽𝗮𝗰𝘁: Solutions delivered have scaled workforces and revenues — streamlining processes and reducing monthly costs dramatically (e.g., cutting costs from $𝟭𝟲𝟬,𝟬𝟬𝟬 𝘁𝗼 $𝟱𝟬,𝟬𝟬𝟬). 𝟮. 𝗥𝗲𝘀𝘂𝗹𝘁𝘀-𝗗𝗿𝗶𝘃𝗲𝗻: Engagements have doubled revenue for companies like 𝗕𝗿𝗮𝗶𝗻𝗧𝗮𝗽 and contributed to a 𝟵𝟵.𝟲% 𝗰𝗿𝗮𝘀𝗵-𝗳𝗿𝗲𝗲 𝗿𝗮𝘁𝗲, leading to over 𝟭𝟬,𝟬𝟬𝟬 𝗱𝗼𝘄𝗻𝗹𝗼𝗮𝗱𝘀 and high user ratings. 𝟯. 𝗜𝗻𝗻𝗼𝘃𝗮𝘁𝗶𝗼𝗻 & 𝗔𝗴𝗶𝗹𝗶𝘁𝘆: Continuously integrating the latest tools—from 𝗔𝗜 𝗶𝗻𝗻𝗼𝘃𝗮𝘁𝗶𝗼𝗻𝘀 like ChatGPT and DeepSeek to advanced mobile app development frameworks — ensures clients remain ahead of the curve. 𝗖𝗼𝗺𝗽𝗹𝗶𝗮𝗻𝗰𝗲 & 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆: PCI-DSS | SOC2 | HIPAA | GDPR 𝗪𝗵𝘆 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲? Partner with an expert who delivers tangible results, allowing you to focus on business growth. If you're ready to stop wrestling with payment integration issues and start experiencing streamlined, profitable operations, let's connect. Book a Consultation Today.

AI-Powered Mobile Engineer • Flutter & Native iOS/Android expert • Full-stack development with Node.js, Python, PHP & Firebase • Scalable backend systems on AWS & Kubernetes What I Build • Mobile apps (Flutter & Native) • SaaS platforms & MVPs • AI-powered applications & chatbots • Cloud-native scalable architectures Integrations & Technologies Flutter • Swift • Kotlin • Node.js • Python • Firebase • AWS • Kubernetes • MongoDB • PostgreSQL • REST APIs • AppsFlyer • Firebase Analytics • Payment & Chat SDKs What You Can Expect • Clean, scalable, production-ready systems • Fast execution with strong architecture decisions • Proactive communication & regular updates • Reliable long-term technical partnership Share your product idea, bottleneck, or existing app challenges, I’ll help with a structured roadmap, technical direction, and execution plan. ---------------------------------------------------------- Experience Across Industries • Healthcare & Fitness • FinTech & eCommerce • Ride-Hailing & Food Delivery • Dating & Matrimonial • Education & Gaming • IoT & BLE Applications

Expert-Vetted Top 1% on Upwork | Top 10 Machine Learning Agency on Upwork | 7+ Years in Production AI | Sports, Industrial, Satellite, Healthcare I'm a Computer Vision Engineer and Machine Learning Engineer with 7+ years delivering production-grade AI systems. Upwork has Expert-Vetted me as a Top 1% specialist in this niche, and our team is ranked among the Top 10 Machine Learning agencies on Upwork. I work with product teams and startups across sports analytics, industrial inspection, satellite and aerial imagery, access control, healthcare, and generative AI — any domain where visual data needs to become reliable, actionable output running in production. As a Computer Vision Engineer, my core work covers object detection, multi-object tracking, pose estimation, image segmentation, image processing, and real-time video analysis. I build end-to-end pipelines in Python using OpenCV, PyTorch, TensorFlow, and Keras, from dataset preparation and model training through TensorRT optimization and Docker deployment on cloud or NVIDIA Jetson edge hardware. I use C++ for performance-critical components where Python latency is a bottleneck. The domains where computer vision engineer experience creates the most value: sports analytics (player tracking, performance metrics, automated statistics from broadcast video), industrial inspection (defect detection and quality control on production lines), satellite and aerial imagery (object detection and segmentation for infrastructure analysis), access control and security (vehicle identification, multi-camera real-time monitoring), and healthcare and biomechanics (pose analysis, body measurement, and biomedical signal processing connected to AI coaching backends). As a Machine Learning Engineer and Data Scientist, I also build systems for structured and time-series data: demand forecasting, anomaly detection, biomedical signal analysis, and structural health monitoring. My data scientist workflow covers scikit-learn, pandas, NumPy, and SciPy alongside deep learning frameworks, with experiment tracking and evaluation metrics to ensure models perform consistently in production. When projects require generative AI or LLM components, I deliver RAG pipelines with LangChain and vector databases, synthetic dataset generation tools, and document processing systems using the Gemini API. Regardless of domain, the computer vision engineer approach stays the same: combine OpenCV-based preprocessing with deep learning inference into a scalable, testable pipeline that holds up under real-world conditions — variable lighting, occlusion, low resolution, multi-camera setups, and edge hardware constraints. I work with YOLO-family models, ByteTrack and DeepSORT for tracking, MediaPipe and MMPose for pose estimation, TensorRT and ONNX for inference optimization, and FastAPI with Docker for production deployment. I work with a specialized team that includes a computer vision PhD, deep learning researchers, and mathematical optimization specialists. This lets me scope complex systems, split parallel workstreams, and deliver a full Computer Vision Engineer engagement faster than a solo contributor could. Clients typically work with me when they need: - a Computer Vision Engineer to build detection, tracking, or segmentation systems from scratch - a Machine Learning Engineer to productionize a research model and meet latency requirements - a Data Scientist who can go from raw data to a deployable model end-to-end - an AI engineer to integrate LLM or generative components into an existing backend - real-time or edge inference optimized for NVIDIA Jetson or mobile deployment - a Python developer who understands both the AI pipeline and the surrounding system architecture If you need a Computer Vision Engineer with the full stack from dataset to deployed API, let's talk. Main stack: Python, OpenCV, PyTorch, TensorFlow, Keras, YOLO, ByteTrack, MediaPipe, MMPose, CoreML, TFLite, TensorRT, ONNX, scikit-learn, FastAPI, Docker, PostgreSQL, C++, NumPy, pandas, SciPy.

WebRTC, FFmpeg, AI, OpenCV, Streamin – I fix real-time video apps and have since 2005. 13,485 hours, 14 projects, 100% Job Success. Zero abandoned. ⚡ 𝗙𝗿𝗲𝗲 𝗣𝗥𝗗. 𝗠𝗩𝗣 𝗶𝗻 𝟳-𝟭𝟰 𝗱𝗮𝘆𝘀. 𝗙𝗿𝗲𝗲 𝗰𝗼𝗱𝗲 𝗿𝗲𝘃𝗶𝗲𝘄 𝗼𝗿 𝟮-𝘄𝗲𝗲𝗸 𝘁𝗿𝗶𝗮𝗹 𝗼𝗻 𝗮𝗻 𝗲𝘅𝗶𝘀𝘁𝗶𝗻𝗴 𝗰𝗼𝗱𝗲𝗯𝗮𝘀𝗲. Netflix, HBO, EA, Nokia, the World Bank, and Harvard trust platforms I've built. These clients don't give second chances. Mine work. ⚠️ Invite me to your job – I reply within 15 minutes. 𝗦𝗲𝗹𝗲𝗰𝘁𝗲𝗱 𝗢𝘂𝘁𝗰𝗼𝗺𝗲𝘀 → Speed.Space – live production platform for Netflix, HBO, EA, and Apex Legends. Multi-stream switching, real-time collaboration, pro codec control. Used at Paris Fashion Week and Live Nation events. Zero downtime. → ShortKlips – video project management for Nokia and the World Bank. 200K+ monthly video views. Cut client project turnaround by 30%. → VirtualCr8tive – hybrid event platform for Harvard University and U.S. Vets. → CloudDoctors – HIPAA-compliant telehealth on WebRTC. Built from concept through multiple release cycles. → YUUALL – WebRTC platform built across multiple versions, long-term engagement. 𝗪𝗵𝗲𝗿𝗲 𝗜'𝗺 𝗦𝘁𝗿𝗼𝗻𝗴𝗲𝘀𝘁 – Pipeline latency – I profile FFmpeg filter graphs and cut processing time without losing quality. – WebRTC under load – jitter buffer, codec mismatch, TURN/STUN. I find which one is yours fast. – AI on live video – TensorFlow inference under 80ms; object and audio recognition on live feeds. – FFmpeg deep work – custom filter graphs, muxing, hardware acceleration (NVENC, VAAPI, VideoToolbox). – Scale & reliability – systems handling 600M+ call minutes a month, fixed at the architecture level. 𝗦𝗽𝗲𝗰-𝗙𝗶𝗿𝘀𝘁 𝗔𝗴𝗲𝗻𝘁𝗶𝗰 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 I work spec-first, not vibe-first. I write the full spec and architecture before any code. Then I drive AI agents: developer, tester, analyst – against strict guardrails to produce production-grade code. The hard real-time work I handle or verify myself: WebRTC pipelines, sub-second latency, on-device ML. You get AI speed with the stability of a senior engineer, 4-10× faster than classic coding. 𝗛𝗼𝘄 𝗜 𝗪𝗼𝗿𝗸 You describe what's broken or what you're building. I send back a diagnosis: the problem, the fix, the cost. Not a sales call. Then we scope the work together before either of us commits. My estimates average ~10% off actuals. I validate before building and run staged QA on every release. 𝗛𝗼𝘄 𝗬𝗼𝘂 𝗖𝗮𝗻 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲 1. Build from scratch – real-time video, AI, or streaming, end-to-end. 2. Drop in on your team – I take the hard video, AI, or WebRTC modules. 3. Rescue and modernize – fix slow or unstable platforms and ship to production. I work inside the Fora Soft team – 51-200 engineers. If your project grows, a PM, QA, and more developers are already there. No solo freelancer who vanishes when scope expands. 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀 𝗜 𝗨𝘀𝗲 𝗗𝗮𝗶𝗹𝘆 ◆ Real-time & video: WebRTC, LiveKit, FFmpeg, GStreamer, OpenCV, HLS/DASH, RTMP/RTSP, OBS, WebGL ◆ AI & ML: TensorFlow, PyTorch, OpenAI API, Whisper, YOLO, object and audio recognition ◆ Back-end: Node.js, Python, TypeScript, distributed systems, high-load APIs ◆ Cloud & infra: AWS, GCP, Docker, Kubernetes, CI/CD 𝗪𝗵𝘆 𝗙𝗼𝗿𝗮 𝗦𝗼𝗳𝘁 The team behind me: 914 jobs · $10M+ earned · 401K+ hours · 250+ projects since 2005 · 400+ clients across 17+ countries · Top WebRTC & Telecom Developer 2022 and 2024 · 1 of 400 devs passes our internal selection. 𝗖𝗹𝗶𝗲𝗻𝘁 𝗙𝗲𝗲𝗱𝗯𝗮𝗰𝗸 "We enjoyed working with Andrey. He saw himself as part of our team and proactively contributed. Even last-minute requests were handled in a timely, constructive way. Many of his proposals were better than our own ideas." – client, YUUALL (WebRTC platform) ⚠️ Describe what's broken. I'll tell you what's wrong, how to fix it, and what it costs.

🅷🅴🆈 👋 I’m a senior mobile app developer with 25 years of experience building high-performance Android & iOS apps, cross-platform solutions with Flutter, and mobile-first platforms that scale across millions of users. I specialize in native iOS (Swift, SwiftUI, Objective-C) native Android (Kotlin, Java), as well as Flutter, React Native, and Kotlin Multiplatform Mobile (KMP) - delivering elegant, stable, and maintainable mobile apps from the ground up. I’ve built 700+ apps across 20+ industries, from social networks and fintech to healthcare and smart IoT. My apps have ranked in the top charts, driven 80% user engagement increase, and reduced crash rates by up to 70%. I bring deep expertise in mobile architecture, native UI/UX implementation, performance optimization, device-level integration (BLE, GPS, sensors), CI/CD pipelines, and App Store / Google Play delivery. 🏆 Why Clients Choose Me ✔️ 25 years of hands-on experience in mobile development ✔️ 700+ mobile apps shipped across Android, iOS, Flutter & React Native ✔️ Reduced crash rate by 70% and improved app speed by 50% on key projects ✔️ Proficient in full mobile stack - UI, business logic, APIs, storage & deployment ✔️ Delivered cross-platform apps used by 5M+ users worldwide ✔️ Led app modernization projects that cut legacy codebase by 40% ✔️ Built KMP-based solutions for unified Android/iOS delivery and faster release cycles ✔️ Experience working with startups, enterprises, and Fortune 500s 📱 Native Mobile Development (iOS & Android) - Native Android apps with Kotlin, Java, Jetpack Compose, Material Design 3 - Native iOS apps with Swift, Objective-C, SwiftUI, UIKit, Combine - Extensive work with platform SDKs, sensors, cameras, biometrics, and BLE - Modular and scalable architecture: MVVM, Clean Architecture, VIPER - App Store & Google Play deployment, TestFlight & Firebase testing - Dependency injection, Jetpack libraries, Swift Package Manager, CocoaPods - Reduced app launch time by 50% through UI/threading optimization - Built multi-language apps with full localization and accessibility support 🔁 Cross-Platform Mobile Development - Flutter (Dart) for beautiful, performant mobile UIs across iOS and Android - React Native with custom native module bridging (Java/Obj-C) - Kotlin Multiplatform Mobile (KMM) to share business logic between platforms - Cross-platform codebases reduced development time by 40–60% - Custom platform views, adaptive UI layouts, and native plugin integrations - Delivered consistent performance & UX across devices 🔧 Backend & API Integration - Firebase (Auth, Firestore, Realtime DB, Cloud Functions, Analytics, Crashlytics) - RESTful API & GraphQL integration, token management, caching - Offline sync & local storage: Room, SQLite, Core Data, Realm - Advanced data parsing & security with Retrofit, Moshi, GSON, Alamofire - Push notifications: FCM, APNS, OneSignal, custom schedulers - Built mobile apps powering live sports stats, geolocation trackers, and health dashboards ⚙️ DevOps, CI/CD & Testing - Fastlane, GitHub Actions, Bitrise, Xcode Cloud, Firebase App Distribution - Unit testing, Espresso, XCTest, UI Automator, and snapshot testing - Optimized delivery pipeline for 2x faster release cycles - Code linting, crash analytics, beta testing, and staged rollout strategy - Crash-free session rates increased to 99.8% on enterprise mobile apps 📊 Mobile Analytics & Monetization - Analytics: Firebase, Amplitude, Google Analytics, Mixpanel - Monetization: in-app purchases, subscriptions, AdMob, Facebook Ads - Real-time event tracking and funnel optimization - Improved retention and session time by 60% using data-driven iteration 🔌 Hardware & Native SDK Integrations - Core Bluetooth, Core Motion, HealthKit, Google Fit, PassKit, Apple Pay - Camera, audio, video processing with AV Foundation & CameraX - Third-party SDKs: Twilio, Sendbird, Stripe, Agora, Mapbox, OpenCV - Built IoT control panels, BLE device dashboards, and voice-command apps 🌍 Industries Served - Fintech & Banking (KYC, payments, secure auth) - Healthcare & Fitness (wearables, telemedicine, step tracking) - E-commerce & Retail (catalogs, product scanners, loyalty apps) - Smart Home & IoT (remote control, Bluetooth integration) - Education, Social Networking, Travel, Utilities, Entertainment ✅ Let’s Build a Mobile App That Delivers From native Android/iOS development to efficient cross-platform delivery - I bring full-cycle mobile expertise to help you design, build, scale, and optimize your app. 📩 Ready to launch something impactful? Text me!