⭐ Microsoft Certified Developer ⚡ Senior Full-Stack .NET Core Developer 10+ years | 50+ enterprise systems | API Integration & Azure Expert | C# / ASP.NET Core / SQL Senior Full-Stack Developer with 10+ years of experience delivering 50+ enterprise-level Web Development and Web Application systems using C#, .NET Framework, ASP.NET, ASP.NET Core, ASP.NET MVC, JavaScript, React, Angular, AngularJS, TypeScript, HTML, HTML5, CSS, API, API Development, RESTful API, API Integration, Microsoft SQL Server, PostgreSQL, SQL, Microsoft Azure, Azure DevOps, CI/CD, Amazon Web Service, Node.js, PHP and Python. I build scalable Web Application platforms with clean API Integration, optimized SQL, and production deployments on Microsoft Azure using C#, .NET Core, ASP.NET Core, React, Angular and JavaScript. I also develop AI powered systems using OpenAI API, OpenAI, Claude, Claude API, LangChain, FastAPI, RAG, Artificial Intelligence, Machine Learning and Natural Language Processing. If you need a developer who can build scalable production-ready systems fast let’s talk. I have built 100+ API Integration and API Development solutions using C#, .NET Core, .NET Framework, ASP.NET, ASP.NET Core, ASP.NET MVC and RESTful API architecture, integrating systems across Microsoft Azure, Azure DevOps, CI/CD pipelines and Amazon Web Service. I have implemented 70+ automation workflows using API Integration, Node.js, Python, FastAPI and SQL-based processing across Microsoft SQL Server and PostgreSQL environments. I have delivered 50+ Web Application systems including SaaS platforms, internal tools, dashboards and integration-heavy solutions using C#, ASP.NET Core, .NET Core, JavaScript, React, Angular, AngularJS, TypeScript, SQL, Microsoft SQL Server, PostgreSQL and API Integration deployed on Microsoft Azure and Amazon Web Service. My focus is combining backend architecture with modern Web Development and Web Design for scalable systems. ⚡ What I Build 🔹 Web Application systems processing 100k+ API requests daily using C#, ASP.NET Core, RESTful API, API Development, Microsoft SQL Server, PostgreSQL and SQL optimization 🔹 Integration-heavy platforms using C#, .NET Framework, ASP.NET MVC, ASP.NET Core, API Integration, RESTful API and Node.js connected to CRMs, SaaS tools and external APIs 🔹 Cloud-based systems deployed on Microsoft Azure, Azure DevOps, CI/CD and Amazon Web Service with scalable backend architecture 🔹 Frontend interfaces using JavaScript, React, Angular, AngularJS, TypeScript, HTML, HTML5 and CSS with responsive Web Design 🔹 AI powered features using OpenAI API, OpenAI, Claude, Claude API, LangChain, FastAPI, RAG, Artificial Intelligence, Machine Learning and Natural Language Processing integrated into existing Web Application platforms ⚡ What Makes Me Different Most developers build features. I build scalable systems. As a Senior Full Stack Developer, I focus on: 🔹 API Development and RESTful API architecture using C#, .NET Core, ASP.NET Core and ASP.NET MVC 🔹 Complex API Integration across enterprise systems using Microsoft Azure and Azure DevOps 🔹 High-performance Microsoft SQL Server, PostgreSQL and SQL optimization 🔹 Cloud-native deployment using Microsoft Azure, Azure DevOps, CI/CD and Amazon Web Service 🔹 Full-stack Web Development using JavaScript, React, Angular, AngularJS, TypeScript, HTML, HTML5 and CSS 🔹 AI powered automation, ai agent workflows and AI Integration using OpenAI API, OpenAI, Claude, Claude API, LangChain and FastAPI I design systems where C#, ASP.NET Core, .NET Core, Microsoft SQL Server, PostgreSQL, SQL, React, Angular and Microsoft Azure work as a unified architecture. My focus is production-grade Web Application systems with clean API Integration, scalable infrastructure and maintainable backend architecture built with C#, .NET Framework, ASP.NET, ASP.NET Core and ASP.NET MVC. ⚡ Core Stack C#, .NET Core, .NET Framework, ASP.NET, ASP.NET Core, ASP.NET MVC, JavaScript, React, Angular, AngularJS, TypeScript, Node.js, PHP, Python, HTML, HTML5, CSS, SQL, Microsoft SQL Server, PostgreSQL, Microsoft Azure, Azure DevOps, CI/CD, Amazon Web Service, API, API Development, RESTful API, API Integration, Web Development, Web Application, Web Design, OpenAI API, OpenAI, Claude, Claude API, LangChain, FastAPI, ai agent, ai automation, ai powered systems, RAG, Artificial Intelligence, Machine Learning, Natural Language Processing. I am currently available for Web Development, API Development, API Integration, AI Integration, ai automation and enterprise .NET development using C#, ASP.NET Core, .NET Core, Microsoft SQL Server, PostgreSQL, Microsoft Azure, React and Angular.

Senior Full-Stack .NET Web Developer with 8+ years of experience in C#, ASP.NET Core, .NET 6/8, MVC, Blazor, React, Angular, SQL Server, and Azure. I build enterprise web applications, SaaS platforms, REST APIs, and microservices with 68+ projects delivered on Upwork and consistent 5-star client feedback. CORE EXPERTISE: ✅ Backend Development — C#, ASP.NET Core, .NET 6/8, MVC, Blazor, REST APIs, Microservices architecture ✅ Frontend Development — React, Angular, JavaScript, HTML5, CSS3, Bootstrap (responsive, modern UI) ✅ Database & Data Access — SQL Server, Entity Framework Core, Dapper (query optimization, performance tuning) ✅ Cloud & DevOps — Microsoft Azure, AWS (deployment, hosting, CI/CD, legacy .NET modernization) ✅ AI Integration — OpenAI API, Copilot Studio, Agentic AI (chatbots, automation, AI-powered features inside .NET web applications) ✅ Team Leadership & Client Communication — I lead a development team, so I scale from quick fixes to full product builds, with clear updates at every milestone WHY CLIENTS HIRE ME: Clients endorse me most often as "Committed to Quality" (27x), "Collaborative" (18x), and a "Clear Communicator" (15x). I deliver clean architecture, honest timelines, and software that's maintainable long after launch. Message me with a short description of your project I'll reply within minutes with an honest assessment of scope, timeline, and approach.

🚀 Looking to bring a cutting-edge embedded product to life? I provide hardware & firmware solutions that power smart, connected devices—from concept to certified, production-ready electronics. With 15+ years of hands-on experience, I’ve helped startups and enterprises successfully launch 50+ products across industries, including IoT, industrial automation, and consumer electronics. I specialize in end-to-end product development, ensuring seamless hardware-firmware integration, low-power optimization, cloud connectivity, and regulatory compliance (FCC, CE, etc.). Whether you need a prototype, small-batch production, or full-scale manufacturing, I can support you at every stage. 🔹 Services Offered ✅ Embedded Firmware Development – Real-time, energy-efficient, and scalable solutions ✅ Custom Hardware & PCB Design – Schematic design, PCB layout, and prototyping ✅ IoT & Wireless Expertise – LoRaWAN, Wi-Fi, Bluetooth, Cellular IoT (2G, 3G, 4G, NB-IoT) ✅ Device Manufacturing & Prototype Production – Rapid prototyping, small-batch production, and mass manufacturing support ✅ Cloud & Dashboard Solutions – IoT data visualization with ThingsBoard, AWS IoT, and ChirpStack ✅ Regulatory Compliance & Certification – FCC, CE, UL pre-compliance testing and firmware optimization ✅ Full-Stack Embedded Solutions – From board bring-up to cloud integration I help businesses and innovators get high-quality embedded solutions without delays or technical roadblocks. Whether you're building a prototype, scaling to production, or optimizing an existing design, I provide efficient, cost-effective, and scalable solutions. 📡 Expertise in Microcontrollers & Hardware ✅ Microcontrollers & SoCs: STM32 (STM32WL, STM32WB, STM32L0, STM32L4, STM32F1, STM32F4, STM32F7), AVR, PIC, Renesas, TI, NXP, ESP32, Raspberry Pi (RP2040) ✅ Wireless & IoT Technologies: LoRa, LoRaWAN, Sub-GHz, Wi-Fi, Bluetooth, Cellular IoT (2G, 3G, 4G, NB-IoT) ✅ Communication Interfaces: I2C, SPI, UART, QSPI, RS485, RS232 ✅ LoRaWAN Gateways: Milesight UG65, RAK Wireless WisGate, CloudGate Micro 💻 Software & Development ✅ Programming Languages: C, C++, Assembly, Perl, C#, Python, JavaScript ✅ RTOS & Embedded OS: FreeRTOS, Zephyr, QNX, RT-Linux ✅ Cloud & IoT Platforms: AWS IoT Core, The Things Network (TTN), ChirpStack ✅ IoT Dashboard Solutions: ThingsBoard, Grafana, and AWS IoT Dashboards ✅ Protocols: REST API, MQTT 🚀 Why Work With Me? ✅ Full-cycle embedded product development – from PCB design to firmware & manufacturing ✅ Experience in industrial, consumer, and medical electronics ✅ Optimized solutions for low power, real-time performance, and scalability ✅ Seamless integration of IoT hardware with cloud-based dashboards ✅ Proven track record of delivering high-quality, production-ready embedded systems 📩 Let’s discuss your project! Whether you need PCB design, firmware development, IoT dashboards, prototype production, or full-scale manufacturing, I can help. Click ‘Invite to Job’ to get started! 🚀

Hey, I’m Dosithée— an Embedded Design Engineer with over eight years of professional experience in embedded systems, electronics design, and firmware development. I focus on building robust, efficient, and production-ready solutions, turning complex ideas into reliable hardware and software products. Experienced across a wide range of architectures and vendors, including: 🔹 Microcontrollers & SoCs - Nordic Semiconductor: nRF51, nRF52, nRF53 - Texas Instruments: CC13xx, CC25xx, CC26xx, CC32xx - STMicroelectronics: STM8, STM32, BlueNRG-1/2 - Espressif: ESP8266, ESP12, ESP32, ESP32-S3, ESP32-C3 - AVR & 8051 families (Atmel, Intel, Nuvoton) - Cypress BLE PSoCs and Dialog Semiconductor DA145xx series 🔹 Development Platforms & SBCs - Arduino (Uno, Nano) - STM32 Nucleo & Discovery - TI LaunchPad - Raspberry Pi, Banana Pi, BeagleBone Black 🔹 Hardware & Peripheral Integration - RFID and biometric (fingerprint) modules - RF modules: Wi-Fi, BLE, Zigbee, Nordic, Silicon Labs - Camera modules (OmniVision) - Displays: LCD, TFT, OLED, GLCD, LED - External storage: SD cards, memory ICs - IoT and wireless communication modules 🔹 Software, Tools & Simulation - IDEs: Keil, STM32CubeIDE, Visual Studio Code - PCB Design: Altium Designer, KiCad, Eagle, EasyEDA - Simulation & Modeling: MATLAB/Simulink, Proteus, Multisim, Logisim - IoT Platforms: Blynk, Arduino Cloud, Adafruit IO, ThingsBoard 🔹 Wireless & Networking - Wi-Fi, BLE, Zigbee, LoRa - MQTT, HTTP/HTTPS - TCP/IP, FTP, RTSP - Selected Projects - STM32-based Automatic Street Lighting System - Gesture-Controlled Robot using ATmega32 - Smart Touchless Trash Bin - Industrial IoT Gateway (NodeMCU) - Battery Management System (BMS) using STM32 - ESP32 Motor Driver PCB - Custom Power Supply and RF Module PCB Designs Why Work With Me? ✔️ Consistent, on-time delivery with production-quality results ✔️ Cost-effective solutions without sacrificing reliability ✔️ Strong communication and long-term project support ✔️ Client satisfaction is always the top priority Thank you !

C++ and OpenGL engineer focused on real-time graphics and computer vision. I design and optimize renderers, WebGL viewers, and Python/OpenCV pipelines that sustain 60 FPS on mid-range hardware and reduce processing time by 40–70 percent. I deliver production services using Django/REST, containerized with Docker, and deploy them to AWS as needed. What I built: 1) Real-time rendering: OpenGL/WebGL pipelines, GLSL shaders (PBR, post-processing), instancing, texture/geometry streaming, scene management, camera controls. 2) Computer vision: OpenCV detection, tracking, OCR, calibration; classical CV with optional deep-learning components; packaged as REST or gRPC services. 3) Industrial/embedded: C/C++ on Linux/Windows, device I/O (serial, USB, Modbus), PLC/SCADA integrations, supervisory dashboards in Django. 4) Performance engineering: Profiling (VTune, Nsight, Perf), multi-threading, memory and GPU tuning, benchmarking with before/after reports. 5) DevOps and delivery: Docker images, CI/CD, reproducible builds, AWS ECS/EC2/S3, clear documentation, and handover. How I work: 1) Quick diagnostic and performance baseline. 2) Written plan with milestones, risks, and acceptance tests. 3) Weekly demo builds and progress reports. 4) Final optimization, documentation, and support. Next step: Share a short screen capture or spec. I’ll respond with a tailored approach, timeline, and fixed-price or hourly option that suits your goals.

☁ Microsoft Certified: Azure Administrator Associate 🏆 80K+ Earning 🎯100+% JSS ✨30+ Jobs Completed 🚀 3100+ Hours Hi 👋, With over a decade 🧠 immersed in MS technologies, I am a seasoned developer specializing in C#, Blazor, .NET (Core 2/3/5), .NET MVC, Angular.js, and Tailwind CSS. I have contributed in a development of 15+ corporate SaaS products and delivered successful projects, transforming their visions into reality. My expertise extends to Azure, DevOps, and CI/CD Integration, including Azure Key Vault. While I have a range of Blazor applications ready to showcase, they are client-specific and thus not publicly accessible to share. 🌟 My Featured Projects ⭐️Blazor Application for a UK-based insurance company. in blazor ⭐️Loan finance application in blazor with radzen tools ⭐️Video calling application in blazor with radzen tools ⭐️Multilevel Marketing site around the world with more than 3.5 lakh active user ⭐️Retail ERP working on 500+ shops and three warehouses. And Maintaining stock. ⭐️Transport management system currently working on 700+ branches in India. ⭐️Warehouse management system, currently working on 27 branches. ⭐️School ERP working on 12 branches. 🧠 WHY CHOOSE ME? 🍋 I don’t just meet high standards, I set them. My goal is to not only meet but extend your expectations with every project. 🍋 I am a strategic thinker, offering smart recommendations to elevate results while keeping costs in check. 🍋 From start to finish, I take full ownership of tasks and projects, ensuring transparent and consistent updates on progress. 🍋 Dependability is my trademark; you can rely on me for quick and responsive communication every time. 🎖️🎖️ My process is thorough, but tailored for each project; normally involves about 6 stages (Discovery, Strategy, Design, Development, QA/testing, Delivery). Always happy to chat or schedule a call to discuss the requirement.🤙 Looking to our successful collaboration. Thanks,

Driven software engineer and team leader specializing in full-stack development, automation, and machine learning. With proven experience as both a hands-on developer and project lead, I have successfully delivered complex, production-ready solutions for startups, agencies, and established enterprises—on time and with 100% client satisfaction. Why work with me? Full-cycle expertise: From architecting robust web backends (Node.js, Django) to crafting pixel-perfect frontends (React, Next.js) and optimizing SQL/NoSQL databases, I offer seamless end-to-end delivery. MVP & automation focus: I frequently build minimum viable products (MVPs), custom automations, and data-driven platforms. My portfolio includes e-commerce marketplaces with 50,000+ SKUs, shift-booking and scheduling apps, and SEO optimization tools—all built for scalability and maintainability. AI and data engineering: I design and deploy machine learning models (TensorFlow, PyTorch), computer vision projects, and automation scripts that drive efficiency and innovation. SEO technology partnership: As a part-time software developer with an SEO agency, I integrate advanced traffic-boosting strategies directly into your site or application. Leadership and reliability: Whether working solo or leading a cross-functional team, I prioritize clear communication, transparent progress tracking, detailed documentation, and post-launch support. What you get: Clear, modular code, thorough automated testing, and video walkthroughs so you can scale quickly and confidently. Tech Stack: Python / C++ / Node.js / Next.js / React / Django / PostgreSQL / MySQL / Docker / PyTorch / Arduino Let’s turn your vision into a high-impact product—message me for tailored solutions and a smooth delivery experience.

I am a senior software engineer with 10+ years of experience delivering robust, high-performance solutions across Microsoft, Cadence, and Oracle. My core expertise spans C++ development, backend architecture, and scalable data systems. In my freelance work, I’ve recently built production-grade backends for fintech/crypto clients, including a Crypto Data API (FastAPI · Redis · PostgreSQL) that unified multiple providers (CoinGecko, CryptoQuant) into normalized endpoints. The system featured background workers, Redis caching for sub-200ms responses, Postgres persistence for analytics, and secure access controls with rate limiting and admin tooling. I specialize in: ---Modernizing legacy codebases (C++/backend refactoring). ---Designing high-throughput APIs with FastAPI/NestJS. ---Integrating distributed workflows with Kafka & real-time data. ---Building resilient storage layers in Postgres, MongoDB, and Redis. I work with precision, accountability, and a strong focus on reliability and scalability. Whether extending thick client applications, designing APIs, or integrating complex data pipelines, I ensure production-grade quality with minimal supervision. Typical Workflow: Requirement clarification → Architecture & planning → Incremental development → Regular demos/updates → Production-ready delivery. Skills Snapshot: Languages: C++ (11/14/17/20), Python, TypeScript Frameworks: FastAPI, NestJS, Qt, React Data: PostgreSQL, MongoDB, Redis, Kafka Cloud & Tools: Docker, GitHub Actions, DigitalOcean What You Get - Clean, well-structured code with documentation - Production-ready APIs and data pipelines - Transparent communication and regular updates - Focus on reliability, scalability, and maintainability - Iterative, collaborative approach that adapts as requirements evolve

Full stack Web and desktop software development using Python, Javascript, Node.js, C++, Golang, PHP, Perl for Windows and Linux. Web scraping and related research. Many years of experience in IT, solid software engineering and e-commerce background. Expertise in working over scalable, secure, and user-friendly applications for various domains.

I build and maintain the backend systems that businesses depend on long after the initial build, API integrations, data layer architecture, and third-party connections that need to keep working reliably for years, not just pass a demo. One client has kept me on a single ongoing engagement for over three years, supporting and extending a data layer generation system. Another has had me as their long-term backend developer for more than a year. That kind of retention isn't an accident and it's what happens when the integration work underneath a system is solid enough that nobody needs to replace it. What this looks like in practice: — Long-term data layer architecture and code generation support (3.5+ years, ongoing) — JIRA API integration for real-time data sync between systems — Stripe and PayPal subscription billing logic built into .NET applications — WebSocket integration for live, real-time data feeds — MariaDB and SQL Server database development and query optimization — Entity Framework Core extensions for complex query requirements — Secure proxy API layers for service-to-service communication Tech stack: C# · .NET Core · ASP.NET Core · REST APIs · Entity Framework · SQL Server · MariaDB · WebSockets · Azure · Git If you need backend or integration work that has to hold up over time, not just ship once, that's what I do. I communicate clearly, scope honestly, and the clients I've worked longest with are the ones who'll tell you that.