🏆 Top Rated 👍 100% Job Success 😄 Long List of Happy Clients ⏳ Fast Turnaround 📞 Excellent Communication Full Stack .Net Developer with 15+ years experience in the Healthcare domain with a special interest in HIPPA and Interoperability. I have expert knowledge of information messaging standards (I.e. HL7/FHIR/X12 and middle-ware principles and concepts (i.e. APIs, REST, WSDL, SOAP, Web Services, etc.) AI Chatbots for healthcare (patient support, triage) LLM integrations (GPT, Claude) Medical data summarisation (reports, notes) AI-powered EMR automation Voice → text medical transcription (AI) AI agents for clinics (appointments, follow-ups) My Expertise • Web & Mobile Solution • Telehealth/Telemedicine Virtual Appointment Booking Solutions & mHealth Apps • EMR, EHR, PHI, Medical Billing Solutions for Patient Healthcare/Medical Records • HealthKit Integration for Fitness Apps • Healthcare device and smartwatch integration for vitals extraction • Healthcare Marketplace Management Solutions • Doctor-patient apps and Websites • Medical Job Portals • Staff Management Software, and more! • Chat-bot, video call, SMS, email service integration  Healthcare Consulting & Subject Matter Expertise: • HIPAA Compliance & Standards • HL7 V2, HL7 FHIR, SMART on FHIR, and NCPDP Standards • EHR & EMR Integration (EPIC, Cerner) • Healthcare Device & HealthKit Integration • Consulting on Telemedicine, EMR/EHR, HL7, FHIR, EDI, HIE, CCDA, HIPAA, Mirth Connect, Billing, Benefit Plan Management, Eligibility Verification, Claim Scrubbing • Start-Up and Large Organization Consulting for HIPAA Compliance • Security Risk Assessment and Remediation for Healthcare Applications • Mirth Connect Configuration and Channel Customization • Mirth Connect-Based FHIR Integration • Lab Integrations (Uni-Directional, Bi-Directional) • Integration with PopHealth, Epic, Cerner • Billing Management and EDI Processing Systems • DICOM Viewer & PACS Solutions Technologies: .Net Framework, .Net Core, C#, ASP.Net MVC/WebAPI2/WebForms, React, Redux, Node Js, REACT, Angular,, WinForms, WPF, WinRT/WinJS, Windows Phone/Xamarin, Entities Framework/ADO.NET, MS SQL Server, Cloud Server like AWS, Azure & GC HIPAA Security Expert doing security assessment, identifying PHI, looking for HIPAA compliance, complying HITRUST requirements, Involved in auditing, reviewing BAA with HIPAA hosting provider. I have also updated with emerging technologies like AI, chatbot integration, and process automation. Our Global Impact: I've proven my healthcare domain expertise across the US, Canada, Australia, Europe, South America, and the UAE healthcare industries. Let's connect and transform your vision into a reality! Add value to your dream product with our expertise. Contact us today!

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.

🚀 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! 🚀

🌟I’m a Full Stack Developer, .NET developer, .NET Core developer, ASP.NET developer, ASP.NET Core developer, C# developer, and C# .NET developer with 8+ years of experience in full stack development, .NET full stack engineering, backend development, frontend development, and custom software development. I build reliable web applications, enterprise systems, SaaS platforms, APIs, and business software that are designed to scale, perform, and stay maintainable over time. My focus is not only on writing code, but on building systems that are stable, clean, and ready for real-world use. As a Full Stack developer and .NET developer, I work across .NET, .NET Core, ASP.NET, ASP.NET MVC, ASP.NET Core, and C# to build production-ready systems with solid backend architecture and modern frontend interfaces. I regularly handle ASP.NET developer work, ASP.NET Core developer projects, ASP.NET MVC applications, .NET Core developer tasks, and C# developer builds where stability, structure, and clean code matter from day one. That includes everything from application design and business logic to integration, testing, and deployment support. A big part of my work as a full stack developer react and React developer involves connecting frontend and backend layers into one smooth product. I build React frontends, support Angular applications, and deliver Angular C# solutions where UI and backend logic need to stay tightly aligned. When clients need a full-stack developer who can own both sides of the application, I step in as the full stack developer who can manage the frontend, backend, and APIs together without splitting the job across multiple people. I also work on C# WPF desktop applications, .NET Core backend systems, API integration, third-party services, authentication, permissions, database design, and application modernization. My experience includes full stack development for SaaS platforms, internal tools, customer portals, enterprise dashboards, and workflow-heavy business systems. Whether the project is a new MVP, a platform rebuild, or a legacy upgrade, I focus on clean architecture, maintainability, and long-term support. I’m especially comfortable with projects that need both speed and depth. Some clients need a .NET developer to fix a specific issue or add a feature. Others need a full stack developer who can take ownership of the entire product layer, including backend services, frontend implementation, and API-driven workflows. In both cases, I bring a practical approach that keeps the codebase manageable and the delivery consistent. 💡 What I specialize in - Full stack development for web applications, SaaS platforms, portals, and business systems. - Full stack developer and full-stack developer work across frontend and backend layers. - .NET developer and .NET Core developer work for scalable backend systems. - ASP.NET developer, ASP.NET Core developer, ASP.NET MVC, and ASP.NET Core application development. - C# developer work using C#, C# .NET, and .NET backend architecture. - Full stack developer react work with React frontends and .NET backends. - React development for modern responsive user interfaces. - Angular development for structured frontend applications. - Angular C# applications with clean frontend-backend integration. - C# WPF desktop applications for internal tools and enterprise workflows. - .NET full stack engineering for data-driven systems and business logic. - API integration, external services, and data flow automation. - MVP development, feature expansion, and product scaling. - Legacy modernization, refactoring, and performance optimization. In my day-to-day work as a Full Stack Developer, I design systems that support real business goals, not just polished screens. That means secure authentication, permissions, APIs, background jobs, database structure, and application logic that can handle growth. As a .NET full stack engineer, I also focus on clean code, maintainability, and practical architecture so teams can keep moving without creating unnecessary technical debt. I care about how software behaves after launch, not just how it looks during development. My core stack includes .NET, .NET Core, ASP.NET, ASP.NET MVC, ASP.NET Core, C#, C# .NET, React, Angular, SQL databases, REST APIs, and modern deployment practices. I’m comfortable working as a full stack developer, .NET developer, ASP.NET developer, ASP.NET Core developer, C# developer, or full-stack developer on both greenfield products and existing systems that need improvement. I can also step into legacy codebases, clean up technical debt, and rebuild critical parts without disrupting the rest of the product. 🌟 Clients usually choose me when they need a full-stack developer who can move fast, stay organized, and build software that holds up over time. If you need a .NET developer .NET Core developer, ASP.NET Core developer, C# developer, React developer, or Angular developer, let’s talk about your project. Message me!

I have over 15 years of software development experience, specializing in audio and video processing and media streaming development. 🎯 Services I Offer • FFmpeg & GStreamer Development & Integration • Video Editing & Post Effects (Overlays, Watermarks, Transitions) • Cross-Platform Media Player Development (Windows, macOS, iOS, Android) • Live / VOD & Adaptive Streaming (HLS, DASH, ABR) • WebRTC Development (Real-time Communication) • Video Processing Performance Optimization & Hardware Acceleration • Audio/Video Codec Development & Optimization • Troubleshooting (C/C++) • Cross-Platform Client App Development (Qt / VC++ / Windows / macOS / Mobile) • Full-Stack Media System Development 💻 My technical stack includes: ✔ Open-Source Projects: FFmpeg, GStreamer, OBS Studio, ExoPlayer, IJKPlayer, WebRTC, SRS ✔ Programming Languages and Frameworks: C/C++ (11, 14, 17, 20) , Python, NodeJS, Objective-C, Java, JavaScript, Qt 4.x – 6.x, WinAPI, MFC ✔ Streaming Protocols: HLS, FLV, DASH, RTMP, RTP ✔ Codecs and Container Formats: H.264, H.265, AAC, MP3, AV1, MP4, MKV, MPEG-TS ✔ Hardware Acceleration and Rendering Technologies: MediaCodec, VideoToolbox, Metal, OpenGL, OpenGL ES, Direct3D, Vulkan ✔ Networking Technologies: HTTP, TCP, UDP, QUIC, Cronet, CURL ✔ Operating Systems: Windows, macOS, iOS, Android ✔ IDEs: Visual Studio, Visual Studio Code, Xcode, Android Studio, Qt Creator ✔ Version Control Systems: Git, SVN, Mercurial I have worked at major technology companies such as Alibaba, gaining extensive project experience. I pay great attention to detail, am proactive in learning and problem-solving, and can quickly adapt to different project requirements. Feel free to contact me anytime!

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 don't just write code, I design stable, scalable systems. Whether you are starting a fresh project or need to fix a complex, messy codebase, I can help you get to production faster without sacrificing quality. I bring over 10 years of hands-on experience in .NET development, creating high-performance, secure, and scalable applications using ASP.NET Core, .NET Core, MVC, Entity Framework, etc. I use modern, AI-native workflow (tools like Cursor and Claude) to handle the repetitive parts of coding. This allows me to deliver high-quality results about 40% faster than traditional methods without sacrificing security or performance. Why I am the right partner for your project: 1. True Seniority: 10+ years of hands-on experience in .NET Ecosystem, C#, and SQL Server. I don't just fix bugs; I prevent them through Clean Architecture. 2. Cross-Platform Mastery: I use .NET MAUI to build native iOS, Android, and Desktop apps from a single codebase, saving you time and budget. 3. Modern Frontend: Expert-level integration with Angular and React for dynamic, high-speed user experiences. 4. Long-Term Reliability: I have a proven track record on Upwork, including a single partnership that lasted over 7 years. I am here for your long-term success. Core Technical Expertise: A - Backend: .NET 8, ASP.NET Core, Entity Framework (EF) Core, Web API, Microservices. B - Frontend: Blazor (Server/WASM), Angular, React, TypeScript, Tailwind CSS. C - Mobile/Desktop: .NET MAUI, Cross-platform development. D - Database: SQL Server (Optimization/Indexing), PostgreSQL, MongoDB. E - Cloud & DevOps: Azure, AWS, CI/CD Pipelines, Docker. F - Microsoft Dynamics 365 - PowerApps, SharePoint, Canvas App, CRM, ERP. Ready to build? Click the Invite button. I am available for a discovery call today and can start on your project immediately.

By choosing to work with me — your project benefits from a developer with 7+ years of software development experience, dedicated to delivering your project efficiently, on time, and with the quality you deserve. I’ve worked with C# and .NET since .NET Framework 4.7 and have kept up with the ecosystem. I build business process automation solutions, RESTful APIs, and backend services. I handle database integration across both SQL (MariaDB, MySQL, SQLite) and NoSQL (MongoDB, Redis). I’m also proficient with Python, using it for web automation and web scraping (BeautifulSoup, Playwright, Selenium Base), UI automation, and blockchain tasks with Web3.py. I’ve delivered projects involving WinForms, ASP.NET, Playwright, and Django; scripting with Batch, Bash, and PowerShell; and setting up Linux and Windows environments, including with VirtualBox. I also implement custom strategies and indicators in Pine Script for TradingView and NinjaScript for NinjaTrader.

I’m a Full-Stack Web Engineer - Microsoft .NET Technologies with over 15 years of experience designing and developing scalable, high-performing web applications using C#, .NET, .NET Core, and Blazor. My work bridges frontend and backend development, with a strong focus on cloud integration, microservices architecture, and building secure, maintainable, and future-ready digital solutions. I’ve successfully delivered solutions across diverse industries—including logistics, e-commerce, real estate, education, and staffing—always with an emphasis on clean code, performance, and reliability. ⚙️ Core Expertise: Languages: C#, JavaScript, jQuery, HTML, CSS, etc. Frameworks: .NET, .NET Core, Blazor, etc. Cloud Platforms: Microsoft Azure, AWS, etc. Databases: MySQL, MS SQL Server, PostgreSQL, MongoDB (NoSQL), etc. I thrive in agile, test-driven environments and enjoy solving complex technical challenges that push boundaries and inspire innovation. My approach blends deep technical expertise with a strong sense of ownership and collaboration. Recognized for my problem-solving mindset, adaptability, and positive attitude, I’m passionate about creating solutions that not only meet business needs but also elevate user experience and project efficiency. I’m always open to connecting with like-minded professionals, exploring collaborations, and contributing to projects that make a real impact through technology. Let’s connect and build something exceptional together. 🚀 — Abhishek Pujara

Senior .NET Core engineer building production systems where correctness isn't optional real-money trading platforms, law enforcement evidence systems, and AI-integrated fintech, for US and UK clients. ➤ Order Management & Risk Management System Velocity Clearing (US equity clearing firm) Tech: .NET Core, FIX protocol, SQL Server, Apache Ignite, NetMQ 🔹 Fixed a production race condition causing incorrect margin approvals under peak load — diagnosed with dotnet-trace/PerfView, not guesswork 🔹 Built real-time order lifecycle event streaming with strict ordering guarantees ➤ Digital Evidence Management Platform US law enforcement (GETAC) Tech: .NET Core, Python, YOLO v7, OpenCV, CUDA, Kafka, Azure 🔹 Computer vision pipeline processing video evidence at scale with confidence-scored detection 🔹 Strict tenant isolation, audit trails on every mutation, zero cross-case data leakage ➤ Keytomic AI SEO SaaS Platform (built and shipped) Tech: .NET Core, OpenAI API, PostgreSQL 🔹 1,200+ active users, featured on Product Hunt 🔹 Multi-tenant architecture, automated content generation pipeline ➤ Customs Declaration Automation UK/EU logistics (FF Customs) Tech: .NET Core, OpenAI agentic workflow, HMRC Sequoia integration 🔹 80% reduction in manual document processing I use Claude Code daily to move faster but architecture decisions and code quality are always mine to own, never unreviewed AI output. I read before I touch, ship incrementally, and document what changed and why. Available for long-term engagements and fixed-scope projects, with workable US/UK timezone overlap. Backend: C#, ASP.NET Core, CQRS, MediatR, Clean Architecture, Entity Framework Core AI/LLM: OpenAI, Anthropic Claude, RAG pipelines, LangChain, pgvector, Azure Cognitive Search Cloud: Azure (App Services, Data Factory, DevOps), AWS (EC2, Lambda, S3, RDS) Data: SQL Server, PostgreSQL, Redis, Apache Kafka Real-time: SignalR, WebSockets, gRPC Keywords: .NET Core developer, C# developer, ASP.NET Core developer, Azure developer, AWS developer, AI integration developer, OpenAI API developer, Claude API developer, RAG pipeline developer, SQL Server developer, PostgreSQL developer, microservices developer, full stack .NET developer, trading systems developer, fintech backend developer.