I am an Engineer specializing in Embedded Systems Design, Firmware Development and IoT product development. I work from concept to final prototype, covering circuit design, firmware programming, hardware integration, testing and performance optimization. I have practical experience working with STM32, ESP32, Raspberry Pi and custom boards. My focus is always on building systems that are reliable, efficient and ready for real-world use. What I Do • Firmware development in C, C++ and Python for real-time and low-power embedded applications • Microcontroller programming for STM32 (HAL and LL), ESP32 (ESP-IDF and Arduino), AVR and Raspberry Pi • IoT and wireless communication setup using Wi-Fi, BLE, LoRa, Z-Wave and cloud APIs such as MQTT and REST • Debugging using logic analyzers, oscilloscopes and JTAG/SWD to solve hardware and firmware issues • Reverse engineering and performance optimization for improving stability and reducing power consumption • Prototype development, board bring-up and functional validation before scaling to production Technical Skillset MCUs: STM32, ESP32/ESP-IDF, AVR, RP2040, Raspberry Pi Languages: C, C++, Embedded C, Python Protocols: I2C, SPI, UART, CAN, Modbus, RS485 Wireless: Wi-Fi, BLE, LoRa (SX126x and LLCC68), Z-Wave Tools: PlatformIO, STM32CubeIDE, ESP-IDF, KiCad, Logic Analyzer, JTAG/SWD Debug Why Work With Me I build embedded products that work, not just code that compiles.

🎮Need polished 3D animation or a Unity game that doesn’t feel like it was assembled during a coffee emergency? I help turn game ideas, scripts, storyboards, references, products, and half-built Unity projects into polished 3D animations, playable game experiences, cinematic visuals, and game-ready assets. My strongest areas are 3D Animation and Unity Game Development, backed by many 5-star Upwork reviews. I also work with Unreal Engine for cinematic scenes, real-time environments, and visual production, with 5-star client feedback as well. What I can help with: 🎥 3D Animation Product animations, game trailers, cinematic videos, character animation, explainer videos, technical visuals, and promotional content. 🎮Unity Game Development Unity 3D games, gameplay prototypes, game mechanics, mobile/PC builds, UI setup, level design, bug fixing, optimization, and interactive experiences. 🧱 Game-Ready Assets Characters, props, environments, textures, PBR materials, optimized models, UVs, retopology, and Unity/Unreal-ready assets. 🧩Unreal Engine Support Real-time scenes, cinematic environments, lighting, materials, Blueprints, walkthroughs, and visual production. 🎬Cinematics & Visual Production Game trailers, product videos, camera animation, lighting, rendering, scene composition, editing, and final video output. 𝐓𝐨𝐨𝐥𝐬 𝐈 𝐮𝐬𝐞: 𝐔𝐧𝐢𝐭𝐲, 𝐔𝐧𝐫𝐞𝐚𝐥 𝐄𝐧𝐠𝐢𝐧𝐞, 𝐁𝐥𝐞𝐧𝐝𝐞𝐫, 𝐌𝐚𝐲𝐚, 𝟑𝐝𝐬 𝐌𝐚𝐱, 𝐙𝐁𝐫𝐮𝐬𝐡, 𝐒𝐮𝐛𝐬𝐭𝐚𝐧𝐜𝐞 𝐏𝐚𝐢𝐧𝐭𝐞𝐫, 𝐀𝐟𝐭𝐞𝐫 𝐄𝐟𝐟𝐞𝐜𝐭𝐬, 𝐏𝐫𝐞𝐦𝐢𝐞𝐫𝐞 𝐏𝐫𝐨, 𝐏𝐡𝐨𝐭𝐨𝐬𝐡𝐨𝐩, 𝐕-𝐑𝐚𝐲, 𝐂𝐨𝐫𝐨𝐧𝐚, 𝐚𝐧𝐝 𝐓𝐰𝐢𝐧𝐦𝐨𝐭𝐢𝐨𝐧. I am not here to just “make a model,” “animate something,” or deliver a file that only looks good from one camera angle. I help shape the final experience so it looks clean, feels polished, performs well, and is actually usable for your game, trailer, product launch, campaign, pitch, or interactive project. Have a rough idea, half-built Unity project, or 3D animation concept that needs direction? Send me an invite with the details. I’ll review it and help you figure out the most practical next step.

If you're looking to: • Build AI-powered applications using LLMs (GPT / OpenAI) • Develop AI chatbots, assistants, or agentic systems • Create scalable full-stack SaaS platforms (.NET, Node, Python) • Integrate APIs, CRMs, and business systems • Implement RAG pipelines, Voice AI, or automation systems => I can help you turn it into a production-ready, scalable solution. I build AI-powered systems and full-stack applications using LLMs, OpenAI (GPT), Python, and .NET, combined with robust API integrations. My focus is not just features, I design and develop complete AI systems that connect data, automate workflows, and scale with your product or business. 𝗪𝗵𝗮𝘁 𝗜 𝗰𝗮𝗻 𝗵𝗲𝗹𝗽 𝘆𝗼𝘂 𝘄𝗶𝘁𝗵: • AI chatbots & GPT-powered assistants (OpenAI, LLMs) • RAG systems (document processing, semantic search, knowledge AI) • Agentic AI systems & multi-step workflows • Voice AI & calling systems (Twilio, Vapi) • Full-stack AI SaaS applications (.NET, Node.js, Python) • API integrations across CRMs, SaaS platforms, and databases • Automation systems and backend workflows • Machine learning / NLP-based data processing 𝗧𝗲𝗰𝗵 𝘀𝘁𝗮𝗰𝗸: • Core: Python, C#, .NET, Node.js, JavaScript • AI: OpenAI (GPT), LLMs, LangChain, embeddings, NLP • AI Development: Claude Code, GitHub Copilot, Codex, Cursor, Windsurf, Manus, Antigravity • Backend: .NET APIs, REST APIs, microservices, webhooks • Full-stack: .NET (Blazor / ASP.NET), Node.js, frontend frameworks • Data: SQL / NoSQL databases, vector databases (RAG systems) • Automation & Integrations: APIs, Zapier, Make, n8n • CRM / Systems: HubSpot, Salesforce, Airtable • Voice AI: Twilio, Vapi (AI voice agents & calling systems) • Tracking & Marketing: ClickFlare, webhook tracking • Payments: Stripe • Cloud & Deployment: scalable backend systems 𝗪𝗵𝗮𝘁 𝗽𝗿𝗼𝗯𝗹𝗲𝗺𝘀 𝗜'𝘃𝗲 𝘀𝗼𝗹𝘃𝗲𝗱: • AI Lead Generation & Outreach System Built an end-to-end AI pipeline for lead sourcing, enrichment, and automated outreach - replacing manual prospecting and saving hours of repetitive work. • AI Customer Support System (GPT + RAG) Developed a chatbot integrated with internal knowledge base using embeddings and semantic search - enabling fast, accurate responses and reducing support workload. • Full-Stack AI SaaS Platform (.NET + APIs + LLMs) Designed and built a scalable AI application with backend APIs, LLM integration, and user workflows - turning a concept into a production-ready system. • RAG-Based Document Intelligence System Implemented document ingestion, embeddings, and retrieval pipeline for semantic search and Q&A across large datasets. • Voice AI & Calling Automation (Twilio / Vapi) Built AI voice agents to handle calls, responses, and workflow execution - automating communication processes. • Business Systems Integration (APIs + CRM + Payments) Integrated Stripe, CRM platforms, and backend systems to automate workflows, sync data, and eliminate manual operations. Share your current workflow or idea - I’ll quickly break it down and suggest the best way to build or automate it using AI.

Senior Software Engineer with strong experience in C++ development on Linux, focused on backend and system-level software rather than microcontroller-only firmware. I have worked on complex production systems including: • Modern C++ development for Linux-based platforms • Backend and long-running services • Multithreaded and performance-critical components • Integration with system services and hardware-facing layers • Unit testing and maintainable codebases • Git-based workflows and Agile environments In addition to C++, I have experience using C# for internal tools and engineering applications, particularly in hardware-related and system support contexts. My background includes working with OpenBMC and low-level Linux components, but my main strength is building robust, clean, and reliable software systems in C++. I am comfortable joining existing codebases, fixing complex issues, and delivering production-ready solutions. Available for: • C++ / Linux development • Backend & system software • Embedded Linux (non-microcontroller-focused) • Code refactoring and performance optimization

✔️ TOP RATED Freelancer specializing in Computer Vision and AI-based image processing systems. I enjoy building practical, production-ready solutions for real-world visual problems and would be glad to contribute to your project in a meaningful way. My core focus is on computer vision, especially tasks involving image understanding, detection, and extraction from complex or noisy inputs. I have strong experience working with: ✔️Image Classification & Fine-Grained Recognition (handling subtle visual differences) ✔️Object Detection (YOLO, SSD, Faster R-CNN, TFOD API) ✔️Image Segmentation (Mask R-CNN, semantic & instance segmentation) ✔️OCR & Text Extraction (structured documents, multi-format, noisy images) ✔️Image Preprocessing (denoising, deskewing, perspective correction, enhancement) ✔️OpenCV-based pipelines for real-time and production use ✔️Deep Learning frameworks: TensorFlow, Keras, PyTorch ✔️CNN Architectures: ResNet, VGG, Inception, EfficientNet ✔️Transfer Learning & Custom Model Training ✔️Synthetic Data Generation & Augmentation ✔️Vector Embeddings & Image Similarity Systems ✔️End-to-End CV Pipelines (data collection → training → deployment) Alongside this, I also have a solid foundation in: ✔️Machine Learning & Deep Learning ✔️Mathematics & Statistics (for model understanding and optimization) ✔️Python ecosystem (NumPy, Pandas, SciPy, etc.) ✔️API Development & Deployment(Docker, AWS, GCP) I hold a Bachelor’s degree in Computer Engineering and am currently pursuing a Master’s in AI, which helps me stay aligned with the latest advancements in the field. My approach is always to first understand the business problem and real-world constraints, and then design a solution that is accurate, scalable, and practical to use. I care deeply about delivering solutions that actually work for clients not just in theory, but in real-world conditions. Thanks & Regards, Ruchir

Hi! I’m a developer who loves turning ideas into playable games and useful apps. I’ve worked on over 15 game projects for clients and developed apps that are stable, efficient, and designed with a clear user experience in mind. Whether you need help developing core gameplay mechanics, designing a level, or creating a cross-platform app, I bring the technical skill and creativity needed to make it happen with clean code and clear communication every step of the way. Here’s what I can help you with: 🕹️ Game Development * Designing and programming custom gameplay systems * Enemy AI (behavior, pathfinding, detection) * UI/UX implementation and animation * Level creation for 2D or 3D worlds * In-app purchases + Admob setup * Game optimization for smooth performance * Engines: Unity, Unreal Engine 5, Godot, Roblox Studio 📱 App Development * Android apps using Java (Android Studio) * Cross-platform apps using Flutter (Dart) * Firebase setup (auth, database, cloud functions) * REST APIs and data integrations * Clean UI with responsive layouts and smooth navigation I’m easy to work with, love collaborating on cool ideas, and always aim to deliver quality work that exceeds expectations. Let’s build something awesome together! 🚀

I am a Senior Full-Stack Mobile App Developer with over 10 years of experience architecting high-performance mobile and web ecosystems using React Native, SwiftUI, and Ruby on Rails (ROR). Beyond my technical expertise, I bring a strategic business mindset to every project, having successfully served as a CTO for a venture-funded startup. I specialize in what many consider the industry gold standard for rapid scaling: a robust Ruby on Rails backend combined with intuitive React Native and native SwiftUI frontends. This architecture guarantees a highly secure API backbone alongside a seamless cross-platform or native user experience. Whether you need a high-scale SaaS platform or a native iOS and Android solution, I effectively bridge the gap between complex backend engineering and clean interface design. Why Choose Me as Your Full-Stack Mobile App Developer? * End-to-End Delivery: I manage the full software lifecycle from Ruby on Rails API architecture and database design to App Store and Google Play deployment. * Proven Engineering Leadership: Over 3 years of direct experience managing development teams and scaling codebases for global markets. * Performance-First Mindset: Deep knowledge of Apple Human Interface Guidelines, Google Material Design, and advanced database query optimization. Industry Expertise * On-Demand and Delivery: Two-sided marketplaces, mobile e-commerce apps, and real-time geo-location mapping services. * FinTech and SaaS: Enterprise CRM mobile extensions, payment processing engines, and secure identity verification. * Social and Communication: Real-time chat platforms using WebRTC or Rails Action Cable, social feeds, and smart AI chatbot integration. Technical Stack and Integrations Full-Stack and Mobile Frameworks * Mobile Development: Expert in React Native (Expo), Capacitor, and Ionic for highly responsive cross-platform applications. * Backend Engineering: Specialized in Ruby on Rails (ROR), building scalable MVC frameworks, Sidekiq background processing, and secure REST or GraphQL APIs. * Native iOS and Android: Advanced SwiftUI, Swift, and Kotlin or Jetpack Compose for hardware-intensive mobile requirements. * Core Languages: Full professional proficiency in Ruby, TypeScript, and JavaScript. Specialized Mobile and Web Features * Real-Time and IoT: Seamless server connectivity via Action Cable, WebSockets, and BLE (Bluetooth Low Energy) hardware communication. * AI Integration: Implementation of AI-native app features, large language model (LLM) chatbots, and on-device edge AI. * Health and Fitness: Native device synchronization with Apple HealthKit and Google Fit APIs. Backend, Cloud, and Database Management * Cloud Infrastructure: Expert setup and deployment on AWS (EC2, S3, Lambda), Heroku, and Google Cloud Platform. * Production Databases: Robust, optimized data management using PostgreSQL, Redis caching, and Realm. * API Architecture: Designing mobile-first, low-latency APIs that enforce strict data security. Global Payment and Security Compliance * FinTech and Payments: Secure, localized integration of Stripe Connect, PayPal, Square, and global payment gateways. * Identity and Compliance: Verified regional integration with enterprise compliance frameworks like ELM, Yakeen, WASL, and CITC. * Biometrics: Native execution of FaceID, TouchID, and behavioral mobile biometrics. Quality, Analytics, and DevOps * Product Insights: Event-driven user behavior tracking via Mixpanel, GA4, and AppsFlyer. * CI/CD Pipelines: Automated deployment tracks using GitHub Actions and Bitrise, supported by testing suites via RSpec, XCTest, and Jest. Core Value Add * Architectural Scalability: I write Ruby on Rails backend systems designed to handle millions of requests without breaking. * Rapid Prototyping: Seamlessly combining React Native and ROR to move your concept from an initial MVP to a market-ready product in record time. * Security-First Standard: Integrating encrypted local data storage, OAuth, and strict JWT authentication protocols into every application layout by default Let's Build a Scalable Product Together I do not just write code - I build reliable mobile products that grow with your business. My portfolio below highlights live, production-grade applications utilizing React Native and Ruby on Rails. I am happy to jump on a free 10-minute consultation call to review your mobile app project requirements, evaluate your budget, and choose the most efficient tech stack for your timeline. Click Invite or Hire to get started on your project today.

💯 100% Job Success | 💲 $80K+ Earned | 70+ Projects Completed ✅ 10+ Years of Embedded Systems Experience ✅ Top Rated Freelancer on Upwork ✅ 100% Job Success Score ✅ $80K+ Earned | 2,600+ Hours Worked ✅ End-to-End Product Development Support ✅ Hardware + Firmware + IoT + Software Team Support I help startups, founders, and businesses design and develop reliable, cost-effective, and production-ready embedded products. My core expertise is in embedded hardware design, PCB design, and firmware development. Since 2013, I have worked on a wide range of products in industrial automation, IoT, wireless systems, energy products, smart devices, and consumer electronics. While hardware is my primary specialization, I also provide embedded software, mobile app, web dashboard, and backend development support through my team of engineers. This allows clients to work with one reliable partner for complete end-to-end product development. ✅ Why Clients Work With Me 10+ years of experience in embedded product development Strong expertise in hardware + firmware co-development Hands-on experience with production-ready PCB design Support from prototype stage to final product Clear communication and practical engineering approach Long-term project support and reliable execution ✅ Core Services Embedded hardware design Schematic design PCB design and layout Firmware development in C Board bring-up and debugging Wireless and IoT product development Prototype to production support Mobile and web applications for connected products ✅ Hardware & PCB Design Expertise 2-layer, 4-layer, and 6-layer PCB design Compact, low-cost, and manufacturable board design Analog and high-speed PCB design Hardware debugging and optimization Product redesign and cost optimization ✅ Embedded Systems & Firmware Expertise Worked with 8-bit, 16-bit, and 32-bit microcontrollers from: Texas Instruments Microchip / Atmel STMicroelectronics NXP Espressif Nordic Semiconductor Strong hands-on experience with: UART I2C SPI ADC / DAC RTC Timers MMC and related interfaces ✅ Wireless Technologies Bluetooth Low Energy (4.0 / 4.2 / 5) Wi-Fi Zigbee MiWi GSM (2G / 3G / 4G) GPS Sub-GHz RF ✅ End-to-End IoT Development Along with hardware and firmware, I also support complete IoT ecosystem development through my team, including: Android and iOS mobile apps Web dashboards Backend / server development Cloud-connected IoT systems ✅ Industries & Solutions I have worked on products related to: Industrial automation IoT and connected devices Smart agriculture Energy and power systems EV charging solutions Fuel / gas dispensing systems Consumer electronics Wireless embedded products Whether you need PCB design, embedded hardware, firmware development, wireless integration, or a complete IoT solution, I can help turn your idea into a reliable working product.

Most MVPs built on low-code/no-code look good in a demo — but collapse when real users or investors show up. That’s where I come in. I’m Hussain, a Top-Rated Plus freelancer & agency founder with 8+ years of experience turning fragile prototypes into production-ready SaaS platforms, AI agents, mobile apps, and cloud-native systems you can scale, monetize, and raise capital on. Not just code — but solutions that work in production. 🛠 What I Build ✅ AI SaaS Development – MVPs to investor-grade systems with real DBs, APIs & infra ✅ Agentic AI & Automations – RAG pipelines, n8n workflows, custom LLM integrations ✅ Mobile Apps – React Native, Flutter, MAUI with Supabase/AWS-backed production APIs ✅ SaaS Foundations – auth, payments (Stripe), subscriptions, secure cloud deployment ✅ API Integrations – REST, GraphQL, OpenAI, Google, LinkedIn, Zoom, Stripe & more ✅ Database Design & Optimization – PostgreSQL (pgvector, PostGIS), MongoDB, MySQL ✅ Cloud & Server Architecture – AWS, Supabase, Azure, GCP, Dockerized deployments ⭐ Why Clients Choose Me 🔹 Deep technical expertise across SaaS, AI automation, and scalable cloud systems 🔹 Startup-friendly: I know what VCs and investors look for in a product demo 🔹 Clear communication: no jargon, just transparent progress & measurable results 🔹 Proven impact: helped startups secure funding, scale to 100K+ users, and hit $1M ARR 📈 Case Study A seed-stage SaaS startup built a no-code MVP that collapsed under 50 concurrent users. I redesigned the architecture with Next.js + Supabase + RAG AI Agents, optimized DB queries, and added monitoring & caching. Result? 30× scale capacity, investor readiness, and a successful funding round. 💬 Client Testimonials ⭐⭐⭐⭐⭐ “Hussain was knowledgeable and proficient across technologies. Great communication and exact execution.” ⭐⭐⭐⭐⭐ “A highly skilled developer. Delivers before schedule with reliable estimates. We’ll be working with Hussain on more AI SaaS projects.” 👥 Who I Work With 🔹 Startups turning MVPs into real, scalable products 🔹 SaaS companies building AI-driven features & automation 🔹 Agencies needing a fractional CTO / technical partner to extend their team 🤝 Let’s Build Together Need a production-ready SaaS, AI Agent, Automation, or Mobile App — fast? Click Invite to Job / Hire Now and let’s architect your future-proof system. 🔑 Keywords: AI SaaS, Agentic AI, RAG pipelines, mobile app development, Supabase, Next.js, React Native, workflow automation, API integrations, scalable backend, SaaS engineer, cloud deployment, database optimization

About Me Experienced AI Full Stack Software Engineer. I build scalable, cloud-based applications combining modern web and AI technologies. I specialize in full stack development with React, Next.js, Node.js, and TypeScript. On the backend, I work with Python (FastAPI, data pipelines, AI workflows) and .NET/C# for enterprise-grade systems. I also have extensive experience with PHP frameworks like Laravel, WordPress, and Drupal, using MVC, MVVM, and other web architecture patterns to create maintainable, modular applications. I work extensively with AI and LLM systems. This includes LangChain, LangGraph, OpenAI models, Hugging Face, and custom NLP pipelines. I build RAG systems, automation workflows, and production-ready AI tools. For Python AI/ML, I use PyTorch for deep learning, YOLO for computer vision, and n8n for workflow automation and integrations. I have strong cloud and DevOps skills. I design Kubernetes clusters, CI/CD pipelines, and serverless systems on AWS and Azure, including SageMaker and Azure ML. I focus on scalable, zero-downtime deployments and reliable production architecture. Sometimes played on Geo service and Geo data science using QGIS, ArcGIS and Google map, OpenStreet, Leaflet , Heatmap and Mapbox GL and Maplibre I enjoy solving complex problems and turning ideas into efficient, maintainable systems. Clear communication and long-term collaboration are my top priorities.