I am a professional developer having 10+ years of experience in developing applications including desktop, web and mobile. 5 years in mobile development and web development. I have expertise in solving any kind of development issues and problems and have experience in managing development teams. I can provide expertise in the following: • ASP.NET, C#, MVC and ASP.NET Core • SQL Server • WPF Desktop Applications • Flutter (Cross platform Mobile Development) • Android Studio • Crystal Reports • AngularJS, JavaScript, jQuery • Entity Framework • HTML5, CSS3 • Hardware Integration, Social Network Integration • Webservices • Web scraping I can provide services both in Backend Development and Frontend Development. I have developed different applications for various clients in my Job Period. Now I have switched to online Job Hunting. I am new here but I have provided solutions to many clients. In my experience, there were many simple applications and tools that use RESTFul services, Firebase, Retrofit. I have developed following applications: • Angan (Mobile Woocommerce App) • Human Resource Information System • Property Management System • Flights Information System • School Management System • Inventory Management • Sales Management System • Point of Sale Systems • Visitor Tracking System Besides these skills and expertise, I am also experienced in coordinating with and managing resources and meeting with clients.

🔥 $4M+ earned | 100% Job Success | Multiplayer & production-grade games built across Unity, Unreal Engine & Roblox I help studios and founders build games that don’t just look good, but actually scale, retain users, and perform in production. If you need a unity game developer or unreal engine game developer who understands multiplayer systems, cross-platform delivery, and long-term architecture, I can help. 🧠 What I Solve Games break when systems don’t scale, multiplayer desync, performance drops, or poor architecture. I help you: Build reliable multiplayer game systems (real-time, synced, scalable) Launch across mobile, PC, unity steam, and Web3 Optimize performance, retention, and monetization loops Turn ideas into production-ready systems (not just prototypes) ⚙️ Core Expertise Unity / Unreal Engine / Roblox Real-time multiplayer, matchmaking, backend systems Unity multiplayer netcode, Photon, Mirror Cross-platform: ios game developer / android game developer / unity mobile game developer Roles: unity developer / unity game developer / unity multiplayer developer unity level design & gameplay systems unreal engine game developer / unreal engine multiplayer roblox game developer blockchain game developer Also: board game developer / board game artist (digital adaptations) Collaboration pipelines with unreal game artist Casual to mid-core including kids game ecosystems 🎮 Genre & System Expertise Action / FPS / TPS → tight combat + real-time sync Open-world & Sandbox → streaming, persistence, MMO-style systems Racing & Simulation → physics, AI systems, vehicle mechanics Hypercasual → rapid prototyping + retention loops Puzzle & Strategy → grid logic, turn-based AI Educational & Kids → safe, scalable kids game systems AR/VR/XR → immersive builds (Quest, Vision Pro) WebGL → optimized builds for browser platforms 🚀 Selected Work Path of Titans (Unreal Engine) Large-scale unreal engine game with multiplayer systems and live optimization. Rugby Nations 22 (Unity) Performance optimization + gameplay + unity level design for mobile. 3D Mini Golf (Unity Multiplayer) Physics-based multiplayer game with real-time sync. Crazy Rush Heroes (Web3) Designed systems as a blockchain game developer with multiplayer economy. Roblox Experiences Built scalable engagement systems as a roblox game developer. Multiple mobile titles as unity mobile game developer / ios game developer / android game developer 🛠️ What I Deliver End-to-end development (GDD → launch → scale) Multiplayer architecture & backend systems Performance optimization (FPS, memory, load time) Refactoring legacy systems & fixing sync issues UI/UX polish and production-ready builds 🤝 How I Work Clean, scalable code (easy for teams to extend) Fast iterations with playable builds Honest feedback to avoid costly mistakes Focus on long-term success, not just delivery If you're investing in a game that needs to scale, retain users, and run smoothly under real load, I’d be happy to help. Regards Rakesh Kumar - ChicMic Studios Last Updated - April 07, 2026

⚡ Top Rated Mobile App (iOS & Android) Developer | 13+ Years | 160+ Projects | 15+ Countries | 100% Job Success I build high-performance mobile and web applications that ship on time, scale under load, and delight users. I lead a team that has served 55+ global clients across startups and enterprises from MVP to production. ──────────────────────────────────────── 📱 iOS DEVELOPMENT ──────────────────────────────────────── Swift · SwiftUI · UIKit · Objective-C · Xcode · Storyboard · Auto Layout · Interface Builder · Combine · Async/Await · Grand Central Dispatch (GCD) · Core Data · Core Location · Core Motion · Core Bluetooth · Core NFC · Core Image · Core Graphics · Core Animation · Core Text · EventKit · HealthKit · HomeKit · CloudKit · StoreKit · In-App Purchase (IAP) · App Store Connect · TestFlight · Instruments · Crash Reporting · Push Notifications (APNs) · Background Fetch · App Clips ──────────────────────────────────────── 🤖 AR / AI / ML ──────────────────────────────────────── ARKit · RealityKit · SceneKit · Metal · Core ML · Create ML · Vision Framework · Natural Language Framework · Speech Framework · AVFoundation · OpenAI API · GPT-4 · ChatGPT Integration · Gemini API · Stable Diffusion · Whisper API · On-device ML · Model fine-tuning ──────────────────────────────────────── ⌚ MULTI-PLATFORM APPLE ──────────────────────────────────────── watchOS · tvOS · macOS · iPadOS · Apple Watch App Development · WidgetKit · App Intents · Siri Shortcuts · SharePlay ──────────────────────────────────────── 🤝 CROSS-PLATFORM MOBILE ──────────────────────────────────────── Flutter · Dart · React Native · Expo · TypeScript · JavaScript · Redux · MobX · Zustand · Firebase · Fastlane · CI/CD · Google Play Console · App Store Optimization (ASO) ──────────────────────────────────────── 📱 ANDROID DEVELOPMENT ──────────────────────────────────────── Kotlin · Java · Jetpack Compose · Android Studio · MVVM · MVP · Clean Architecture · Retrofit · OkHttp · Room · WorkManager · LiveData · ViewModel · Hilt · Dagger ──────────────────────────────────────── 🌐 FULL-STACK / WEB ──────────────────────────────────────── Node.js · Express.js · NestJS · React.js · Next.js · Angular · Vue.js · TypeScript · JavaScript · HTML5 · CSS3 · Tailwind CSS · REST API · GraphQL · WebSockets · Socketio · WebRTC · gRPC · Microservices · Serverless · AWS · Google Cloud Platform (GCP) · Azure · Firebase · Docker · Kubernetes · CI/CD · GitHub Actions ──────────────────────────────────────── 🗄️ DATABASE & BACKEND ──────────────────────────────────────── MongoDB · PostgreSQL · MySQL · SQLite · Redis · Firestore · DynamoDB · Supabase · Prisma · Mongoose · Sequelize · TypeORM ──────────────────────────────────────── 🎨 UI/UX DESIGN ──────────────────────────────────────── Figma · Adobe XD · Sketch · InVision · Zeplin · Miro · Blender · Lottie Animations · Rive · Motion Design · Prototyping · Wireframing · Design Systems · Accessibility (WCAG) ──────────────────────────────────────── 🏭 INDUSTRIES SERVED ──────────────────────────────────────── FinTech · HealthTech · EdTech · E-Commerce · SaaS · Gaming · Real Estate · Logistics · Travel · Social Networking · Dating · Media · Entertainment · Hospitality · Sports & Fitness · Productivity · Banking · AR/VR ──────────────────────────────────────── ✅ WHY CLIENTS CHOOSE ME ──────────────────────────────────────── → 100% Job Success Score — verified by Upwork → Top Rated badge — sustained over 10+ years → Available across US, EU, APAC time zones → Clean, documented code with Git version control → Weekly progress updates + milestone-based delivery → Post-launch support included Let's build something exceptional together. Message me and I'll reply within a few hours.

✅ 𝗠𝘂𝗹𝘁𝗶𝗽𝗹𝗲 𝟳-𝟴 𝗳𝗶𝗴𝘂𝗿𝗲 𝘀𝘂𝗰𝗰𝗲𝘀𝘀𝗲𝘀 & 𝗦𝗮𝗮𝗦 𝗰𝗹𝗶𝗲𝗻𝘁𝘀/𝗮𝗽𝗽𝘀 𝗮𝗰𝗾𝘂𝗶𝗿𝗲𝗱. ✅ 𝟳𝟱+ 𝗮𝗽𝗽𝘀 𝗯𝘂𝗶𝗹𝘁. 𝟭𝟭+ 𝘆𝗲𝗮𝗿𝘀 𝗽𝗿𝗼𝗳𝗲𝘀𝘀𝗶𝗼𝗻𝗮𝗹 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲. ✅ 𝗔𝗰𝗰𝘂𝗿𝗮𝘁𝗲 & 𝗴𝘂𝗮𝗿𝗮𝗻𝘁𝗲𝗲𝗱 𝗾𝘂𝗼𝘁𝗲𝘀 𝘄𝗶𝘁𝗵 𝟯𝟬-𝟰𝟬% 𝗹𝗼𝘄𝗲𝗿 𝗰𝗼𝘀𝘁𝘀 𝗮𝗻𝗱 𝗱𝗲𝘃 𝘁𝗶𝗺𝗲𝘀 𝘁𝗵𝗿𝗼𝘂𝗴𝗵 𝗽𝗿𝗼𝗽𝗿𝗶𝗲𝘁𝗮𝗿𝘆 𝗳𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸 𝘂𝘀𝗲(prebuilt-SaaS code). ✅ 𝗣𝗵𝗲𝗻𝗼𝗺𝗲𝗻𝗮𝗹 𝗰𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗮𝗻𝗱 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝗺𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝘀𝗸𝗶𝗹𝗹𝘀. 𝗜𝗻𝘁𝗲𝗹𝗹𝗶𝗴𝗲𝗻𝘁 𝗱𝗲𝘃 𝗽𝗿𝗼𝗰𝗲𝘀𝘀 𝗳𝗼𝗹𝗹𝗼𝘄𝗲𝗱 𝗯𝘂𝗶𝗹𝘁 𝘁𝗵𝗿𝗼𝘂𝗴𝗵 𝗼𝘁𝗵𝗲𝗿 𝗽𝗿𝗼𝗱𝘂𝗰𝘁 𝘀𝘂𝗰𝗰𝗲𝘀𝘀𝗲𝘀. ✅ 𝗦𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀, 𝗲𝗻𝘁𝗲𝗿𝗽𝗿𝗶𝘀𝗲-𝗿𝗲𝗮𝗱𝘆 𝗳𝗿𝗼𝗺 𝗹𝗮𝘂𝗻𝗰𝗵. ✅ 𝗨𝗦 𝗰𝗹𝗶𝗲𝗻𝘁 𝘀𝗽𝗲𝗰𝗶𝗮𝗹𝘁𝘆. Hi, I’m Andrew! I specialize in delivering polished SaaS apps consistently focused on earning revenue. 𝗜𝗻𝘃𝗶𝘁𝗲 𝗺𝗲 𝘁𝗼 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸 𝗼𝗿 𝘀𝗲𝗻𝗱 𝗺𝗲 𝗮 𝗱𝗶𝗿𝗲𝗰𝘁 𝗺𝗲𝘀𝘀𝗮𝗴𝗲 𝗮𝗻𝗱 𝗶𝗳 𝘁𝗵𝗲𝗿𝗲’𝘀 𝗮 𝗹𝗶𝗸𝗲𝗹𝗶𝗵𝗼𝗼𝗱 𝗼𝗳 𝗮 𝗴𝗼𝗼𝗱 𝗳𝗶𝘁 𝘁𝗼 𝘄𝗼𝗿𝗸 𝘁𝗼𝗴𝗲𝘁𝗵𝗲𝗿, 𝗜’𝗹𝗹 𝗶𝗻𝘃𝗶𝘁𝗲 𝘆𝗼𝘂 𝘁𝗼 𝗯𝗼𝗼𝗸 𝗮 𝗰𝗼𝗺𝗽𝗹𝗶𝗺𝗲𝗻𝘁𝗮𝗿𝘆 𝗰𝗼𝗻𝘀𝘂𝗹𝘁𝗮𝘁𝗶𝗼𝗻 𝗰𝗮𝗹𝗹 𝘁𝗼𝗴𝗲𝘁𝗵𝗲𝗿. 🗣 𝗝𝗼𝗵𝗻 𝗠𝘂𝗹𝗹𝗲𝗻𝗵𝗼𝗹𝘇 - 𝗛𝗲𝗮𝗱 𝗼𝗳 𝗦𝗮𝗹𝗲𝘀, 𝗦𝘁𝗿𝗮𝘁𝗲𝗴𝗶𝗰 𝗘𝗻𝘁𝗲𝗿𝗽𝗿𝗶𝘀𝗲 - 𝗨𝗯𝗲𝗿 𝗘𝗮𝘁𝘀 ❝ Andrew is the most skilled freelancer and developer I have ever worked with, and I have worked with a lot. He was able to take very broad ideas and turn them into actionable insights and plans in a way I could never imagine was possible. Andrew is the best possible thing to happen to our business and the definition of a true professional. I could not recommend him enough. Anyone who has the opportunity to work with Andrew should consider themselves extremely lucky. ❞ I excel at expertly guiding the app dev process to max out your revenue-earning potential in contrast to your costs, and to steer you away from common SaaS app pitfalls. Client Outcome Examples: ⚡ amzalert.com (8-Figure Acquisition - Rebuilt In 4 Months) ⚡ launchcontrol.us (8-Figure Annual Recurring Revenue - ARR) ⚡ GuestBan.com (Concept-To-Live in 5 Months - 1M+ Monthly App Checkins) My support is based on hard-won successes built through more than a decade of SaaS app obsession. Most of my clients are: ☑️ Existing Businesses - Post-revenue ☑️ Solopreneurs & Small Teams - Wanting to build an MVP app ☑️ Funded Startups - Focused on turning funding into MRR ☑️ Existing Early Stage SaaS - Want to rebuild and scale up I’m the founder of a small, hand-picked team of talented humans. I’m personally involved in all projects, and we only employ senior developers and native English speakers from the US for project management and communication. My team and I are able to consistently reduce dev costs by about 30-40% by leveraging pre-built development frameworks for common app experiences like the user login or checkout, for example, while reserving valuable dev hours for truly custom functionality. Every project we build delivers: 📱Cross Device Compatibility - Desktop - Mobile - Tablet 📈 App Speed Optimization 🧩 Scaleable - Cost-Effective Feature Addition Potential 🛡️ Security 📊 User Analytics & Internal Dashboards 🌐 Multi-Language Localization 🤖 Quality Assurance - QA 📜 Paid User Subscription, Billing & Renewal Management Thanks for taking the time to learn more about me. Invite me to your project or send me a direct message if you’re interested in working together. Talk soon! Andrew Mace - Founder - Lean Engineering Highlights of the work I have extensive experience in includes: SaaS MVP • AI Automation • No-Code/Low-Code • Process Automation • RPA • .NET 8 • Python • AWS • Azure • Docker • Serverless • OpenAI / ChatGPT • Generative AI • Zapier • Make.com • UiPath • Power Automate • n8n • Bubble • Airtable • Stripe • PayPal • Twilio • Slack • Teams • REST APIs • Webhooks • SQL • PostgreSQL • Redis • Power BI • KPI Dashboards • ETL • Airflow • Real-Time Chat • Push Notifications • Subscription Billing • CRM Integration • Lead Generation Bots • Data Analytics • Digital Transformation • Workflow Automation • Rapid Prototyping

As a Senior Game Developer with over 8 years of experience, I specialize in creating immersive game experiences using Unity 3D and Unreal Engine. I’ve had the opportunity to work on a variety of exciting projects, including FPS/TPS games, simulations, racing games, and more, with a strong focus on both technical performance and creative design. I combine my expertise in game development with a passion for creating engaging gameplay mechanics, realistic 3D models, and optimized game environments. My knowledge extends to various programming languages like C++, Java, and C#, and I have hands-on experience in 3D modeling, texturing, and lighting using industry-leading tools like Blender, Maya, V-Ray, and Substance Painter. Key Skills: - Game Development: Unity 3D, Unreal Engine, FPS/TPS games, simulation games, racing games, and more - 3D Modeling & Design: Blender, Maya, V-Ray, Substance Painter - Programming: C++, C#, Java, OpenGL - Performance Optimization: Ensuring smooth gameplay across platforms with a focus on performance and scalability - Collaboration: Proficient with GIT for team-based development and version control Let’s collaborate to bring your game vision to life. I’m ready to help you create an unforgettable gaming experience. Contact me to discuss your project and explore how we can turn your ideas into reality. Keywords to find me: #Unity3D #UnrealEngine #GameDevelopment #C++ #C# #GameDesign #3DModeling #FPS #TPS #Simulation #RacingGames #HyperCasual #GameDeveloper #3DArt #SubstancePainter #GameOptimization #GameMechanics #GamingStudio #GameArt #GameProgramming #mern #react #node #flutter #angular

I build computer vision, mobile AI, and LLM agent systems that run in production — not proof-of-concepts. $600K+ earned · 100% Job Success · Top Rated Plus · 50+ apps shipped · 10+ years.   🎥 Computer Vision & Video AI Real-time detection, tracking, and video pipelines built for live production. - Built real-time tracking for a US sports company — processing live camera feeds frame-accurate for automated broadcast. - Image registration & feature matching (homography, SIFT/ORB) for frame alignment and multi-frame processing. - Edge & on-device optimization: quantization, ONNX / TFLite / CoreML export, low-latency real-time inference. Stack: YOLO, OpenCV, C++ inference, homography, SIFT/ORB, FFmpeg, ONNX, CoreML, TensorFlow Lite.   📱 Mobile AI — iOS & Android Where mobile meets ML: I ship AI that runs on the device, not just calls to a server. - On-device inference with CoreML & TensorFlow Lite — quantized, optimized models running in real time, offline, no backend round-trip. - Real-time computer vision on phones — live camera detection & tracking running directly on iOS/Android hardware. - AI embedded in the core product flow — vision and ML features, not a bolted-on toggle. - 50+ apps shipped over 10+ years across healthcare, fintech, wellness, and sports. Swift, SwiftUI, Kotlin, Jetpack Compose, Flutter, React Native.   📊 Data & ML Pipelines - Built a PySpark clustering pipeline for a US energy AI company — segmented ~1M households into 50–200 cohorts, production-grade with a validation framework. 🛠 Stack Vision: YOLO, OpenCV, C++ inference, homography, FFmpeg, CoreML, TensorFlow Lite Mobile: Swift, SwiftUI, Kotlin, Jetpack Compose, Flutter, React Native AI/LLM: Claude, GPT, Gemini, LangChain, LangGraph, RAG, vector DBs, n8n ML/Data: Python, PyTorch, TensorFlow, PySpark, Pandas, scikit-learn Cloud: AWS Bedrock, Azure OpenAI, Vertex AI, Firebase 🌎 Based in Buenos Aires (GMT-3) — solid overlap with US & EU business hours. English: Fluent. Weekly updates, clear timelines, honest scoping — if something needs to change mid-project, you hear it early, with options. Send me the problem — I'll tell you how I'd approach it and how long it'll take. Message me to start

Top Rated Plus (Top 1% on Upwork) | 100% Job Success | 3,800+ Hours Billed | HIPAA & Privacy Law Certified (UPenn) Most of my work over the past 10 years has been backend systems where failure gets expensive. A payroll platform that pays US businesses on time, every cycle. An EHR holding patient records for two healthcare organizations in Florida. A B2B platform a Silicon Valley startup runs its sales intelligence on. All shipped, all live, all still running without me babysitting them. That last part matters. As a Full-Stack Developer, I build systems that hand off cleanly: documented APIs, CI/CD pipelines on Azure, databases another developer can read in a week. You own the code, and you can run it without me. What I actually do as a Backend Developer: REST APIs and services in ASP.NET Core, C#, and Python (FastAPI, Django). Database design in PostgreSQL, MySQL, and SQL Server. Microservices and multi-tenant SaaS architecture. On the frontend, React and TypeScript. For mobile, Flutter apps live on the App Store and Play Store, including one with 500K+ downloads. HIPAA work is a specialty, and I'm certified: Privacy Law & HIPAA through the University of Pennsylvania. I've built EHR/EMR systems, EVV home care platforms, and hospital task management tools. If your product touches patient data, I already know what an audit looks for: encryption at rest, access logging, role-based permissions. I also do AI Development inside real products. LLM features, automation, and agentic workflows using Claude and OpenAI APIs. I use Claude Code and Cursor daily, so AI-assisted delivery speed comes standard. Clients typically hire me as a Full-Stack Developer or Backend Developer for: SaaS platforms and API-driven web applications HIPAA-compliant healthcare software Fintech and payroll systems with third-party integrations Flutter Mobile App Development, backend included Rescuing or scaling an existing ASP.NET Core / React codebase Every project comes with 45 days of free maintenance after launch, and larger builds get extra specialist hands under my lead when the scope calls for it. My longest Upwork contract ran 1,739 hours with the same client. That's the kind of working relationship I build. If you want a second opinion on your architecture or a straight read on scope and timeline, message me. Worst case, you walk away with a clearer plan.

I am passionate about software development...it’s not just my career, it’s my hobby. I have more than 18 years of experience. I'm based in Costa Rica, Central America; one of the most educated countries in the whole of Latin America. I'm constantly striving to learn new things and improve. I DO follow industry news, regularly tinker with new technologies, and read books and blogs to keep my skills current. - I work well alone or within a team environment and enjoy working with my colleagues. - I always use GitHub to keep track of my code and push commits daily - I am fluent in English and Spanish and I'm learning German as a third language, I always write documentation for the code I write and comments. Please, feel free to contact me and let's discuss further details of your projects.

I design and develop production-ready firmware for connected and embedded systems, with a strong focus on reliability, performance, and long-term maintainability. My work spans the full development lifecycle, including system architecture, firmware design and implementation, hardware bring-up, optimization, and deployment support for production environments. I primarily work in C and C++ for ARM Cortex-M, ESP32, and NRF52 platforms. Both bare-metal and RTOS-based approaches are used, especially FreeRTOS, to build deterministic and efficient embedded systems. This includes designing multitasking architectures, handling interrupts, and implementing low-level peripheral control for real-time applications. Strong experience with embedded communication protocols such as SPI, I2C, UART, CAN, BLE, and WiFi, along with development of custom drivers for sensors and external hardware. The focus is on stable integration and efficient operation in resource-constrained embedded environments. On the IoT side, I build firmware for secure and reliable connectivity between devices and cloud platforms. This includes MQTT-based telemetry systems, REST API integration, OTA update support, and low-power optimization techniques such as sleep modes, deep sleep, and duty cycling for battery-powered devices. I also handle hardware bring-up and system-level debugging to support early-stage development and integration between firmware and hardware. Close collaboration with hardware teams ensures smooth integration between PCB design and firmware behavior. In addition, I have experience in embedded AI and edge computing, including deploying TinyML models on microcontrollers. I work with startups, hardware teams, and product companies, helping take embedded products from early prototypes to production deployment, as well as supporting existing systems through debugging, optimization, and firmware evolution.

Your vision deserves a technical partner, not just a developer. I specialize in transforming ideas into high-performance applications across the entire digital ecosystem: mobile, web, and desktop. I believe great software is a blend of cutting-edge technology and thoughtful user experience. Whether it's a consumer-facing iOS/Android app, a mission-critical web dashboard, or a native Windows/macOS application, I build with a focus on strategy, scalability, and long-term success. I build everywhere your users are. → Mobile: Native (Swift, Kotlin) & Cross-Platform (Flutter, React Native) → Web: Modern JS Frameworks (React, Angular, Vue) & Backend (Node.js, Python) → Desktop: Electron, .NET MAUI, Native APIs Ready to build the right solution, not just the easy one? Get in touch.