Principal Software Engineer with 23+ years of experience particularly using Microsoft Technologies like C#, .NET, VB.NET, VBA, VB 6.0, VC++, MFC, Win32, SQL Server, Azure, .NET Core, and other technologies like Angular, React, Vue, NextJS, NodeJS, PHP, PostgreSQL, MySQL, Oracle, Sybase and MongoDB.

* Over 15 years of hands-on experience in leading a team of software developers. * Extensive experience in developing mobile, desktop, web, blockchain, IoT, and corporate solutions. * Expert knowledge of Object-Oriented Programming. * Expert knowledge in cross-platform software development for mobile (Android, iOS, WebOS, Tizen) and desktop operating systems (Windows, Linux, macOS) using C++ with wxWidgets, and C# with Xamarin. * Proven experience in successfully managing Blockchain startups. * 20 years of experience in software development. * wxWidgets Technology Evangelist in Eastern Europe.

I am a .net expert with 20+ years of experience in different domains regarding windows applications, web development, cloud based applications, web services, architectural designs, database design. I always aim to make stable solutions with the quality that is needed to make clients satisfied with the result. Also, I have experience in team-lead and functional and technical design and analysis. The last projects, I had the position of solution architect. I speak Dutch, English (fluent) and French.

💻 Back-End Development ⚡️ Full Stack Development ⚡️ Desktop Software Development 📜 .NET and C#: 🔹 ASP.NET Core 🔹 Entity Framework Core 🔹 FluentValidation 🔹 MediatR 🔹 Automapper 🔹 FastExpressions 🔹 Serilog 🔹 SignalR 🔹 Identity Framework Core 🔹 BenchmarkDotNet 🔹 xUnit, nUnit, FluentAssertions, NSubstitude, Bogus 🔹 Polly 📜 Databases: 🔹 MS SQL 🔹 MySQL 🔹 Postgres 🔹 MongoDB 📜 Architecture: 🔹 DDD 🔹 Event Driven Design 🔹 Clear Architecture 💻 Front-End Development ⚡️ Mobile App Development ⚡️ Full Stack Development 🚀 Expertise in: 📱 React & React Native (Expo): Building dynamic web and mobile applications 🌐 Modern Frontend Frameworks: Proficient in React, Angular 2+, Vue.js, and Next.js for responsive, scalable web development 🔧 Backend Knowledge: Familiar with PHP (Laravel, Slim, Lumen) and Node.js for basic backend integration 🛒 CMS & E-Commerce: Expertise in WordPress, WooCommerce, Plentymarkets, Magento theme/plugin development, and custom integrations ✨ Clean, Efficient Code: Passionate about writing maintainable and scalable solutions for a smooth user experience 🔗 API Integration: Skilled in SOAP/RESTful API development and integration for seamless client connectivity 💪🏻The following stack that successfully used: 🔹SCSS 🔹CSS 🔹HTML 🔹TypeScript 🔹RXJS 🔹NGRX 🔹NextJS 🔹ReactJS 🔹REDUX 🔹SAGA 🔹Promises 🔹Server Side Rendering based on NextJS 🔹NestJS 🔹MySQL 🔹ExpressJS 🧠 AI: 🔹 Machine Learning 🔹 Large Language Models (LLM) 🔹 Prompt Engineering 🔹 LangChain 🔹 OpenAI 🔹 Anthropic 🔹 Google GenAI 🔹 FAISS 🔹 Retrieval Augmented Generation (RAG) 𝙎𝙚𝙖𝙧𝙘𝙝 𝙛𝙤𝙧 𝙢𝙚 𝙪𝙨𝙞𝙣𝙜 𝙩𝙝𝙚𝙨𝙚 𝙠𝙚𝙮𝙬𝙤𝙧𝙙𝙨: C#, ASP.NET Core, .NET Framework, Entity Framework, SQL Server, PostgreSQL, MySQL, REST APIs, JSON, XML, GraphQL, Razor, Blazor, Php, Python, Angular, React, Vue.js, JavaScript, TypeScript, HTML5, CSS3, SCSS, Bootstrap, Tailwind, Azure (App Services, Functions, DevOps, Blob Storage), AWS, Docker, Kubernetes, Microservices, CI/CD, Git, GitHub, GitLab, TDD, xUnit, NUnit, Dapper, Swagger, OAuth, JWT, WebSockets, RabbitMQ, Redis, SignalR, Sitecore, Umbraco, Kentico, DNN, Orchard Core, Contentful, Strapi, ADO.NET, ASP.NET MVC, AngularJS, AJAX, Adobe Photoshop, ASP.NET Web API, Google Analytics, Google Chrome Extension, Ecommerce Website, Browser Extension, Web Application, Website Redesign, API, API Integration, Desktop Application, Website Optimization, Software Debugging, Web Development, Database Development, AI Agent Development, WildFly, Apache HTTP Server, Eclipse Jetty, Microsoft IIS, IBM WebSphere, SQLite, Mimer SQL, Azure Cosmos DB, MongoDB, EC2, ECS, Lambda, S3, RDS, CloudFormation, AWS Backup, IAM, CloudFront, CloudWatch

Senior Software Architect specializing in secure systems and IoT Sec solutions with 15+ years of experience. I architect and deliver end-to-end nfc solutions, from embedded firmware to cloud-based backend systems. 🎯 CORE EXPERTISE IOT Systems - NFC Solutions: Reader/Writer, HCE, Digital Wallets (Android/iOS) - Smart Cards: JavaCard, MIFARE, DESFire, NTAG,Global Platform,GP,JCOP,Secure Element - Security: PKI, FIDO, Secure Element,HSM, PCI-DSS Compliance - RFID Systems: Asset Tracking, Access Control - EMV Payment: L1/L2/L3 Kernel Development & Certification - Microcontrollers: ESP32, STM32 (WiFi/BLE, RTOS) - Firmware: Secure Bootloader, OTA Updates, Real-time Systems - Industrial Applications: POS Terminals, Vending Machines, Access Control - IoT Architecture: Sensor Integration, Remote Management Full-Stack Development - Backend: Node.js, REST APIs, Database Design (SQL/NoSQL) - Cloud Services: Firebase, AWS/Azure/GCP Deployment - Mobile: Android (NFC APIs), iOS (CoreNFC), React Native - Desktop: Qt, .NET, Cross-platform Applications - Languages: C/C++, JavaScript/TypeScript, Java, C# 💼 SIGNATURE PROJECTS ✅ ESP32 IoT Systems - Created NFC-enabled payment solution with cloud integration - Built secure firmware with OTA update capabilities - Integrated Firebase for real-time data synchronization ✅ Cross-Platform Digital Wallet - Developed mobile wallet supporting EMV contactless payments - Implemented HCE and Secure Element integration - Built Node.js backend with Firebase authentication ✅ Enterprise RFID Solutions - Designed asset tracking systems for industrial clients - Implemented access control with NFC/RFID readers - Deployed cloud-based management platform ✅ EMV Payment Terminal Solutions - Developed EMV L2 & L3 kernel for contact/contactless terminals - Achieved EMVCo certification for payment applications - Implemented secure key management and transaction processing 🔧 TECHNICAL STACK Hardware: ESP32, STM32, NFC Readers, RFID Systems Backend: Node.js, Express, Firebase, REST APIs Database: MongoDB, PostgreSQL, MySQL, Firestore Cloud: Firebase, AWS, Azure, Docker deployment Mobile: Android, iOS, React Native Desktop: Qt, .NET, Windows/Linux Security: PKI, FIDO, PCI-DSS, Secure Boot 📋 CERTIFICATIONS & STANDARDS EMVCo, PCI-DSS, PBOC, Global Platform, ISO 14443 I deliver production-ready solutions with clean code, comprehensive documentation, and ongoing support. Available for both fixed-price projects and long-term contracts.

Experienced software developer since 2001 with 200+ completed projects and $200K+ in successful deliveries. Education & Background: 5-year Computer Science degree + 2-year specialized diploma Senior developer at MicroTech (CMI Level 3) and ITS (CMI Level 5) Full-time freelancer since 2007 serving US, UK, and international clients Core Expertise: 🔥 Trading Systems Development: MQL4 & MQL5: Expert Advisors, Custom Indicators, Trading Panels Multi-Platform: cTrader cBots, NinjaTrader, TradeStation, TradingView Pine Script Advanced Features: HFT systems, multi-timeframe analysis, risk management Trading Automation: Signal processing, order management, portfolio systems 💼 Business Applications: Excel Automation: VBA, VSTO, complex dashboards and workflows Desktop Development: C#, VB.NET, ASP.NET, Windows applications Database Systems: SQL Server, MySQL, Access, data management Web Integration: APIs, JavaScript, Python automation, web scraping What Sets Me Apart: ✅ 20+ years proven experience with Fortune 500 companies (BP, Siemens, Nestlé, IBM) ✅ Trading systems specialist - Deep understanding of market mechanics and execution ✅ Complete project ownership - From strategy design to live deployment ✅ Multi-platform expertise - Work across all major trading platforms ✅ Long-term partnerships - Many clients since 2005 with ongoing system maintenance My Development Process: Strategy Analysis - Understanding trading logic and market requirements Technical Architecture - Robust, scalable system design Iterative Development - Regular testing with demo builds Performance Optimization - Speed, accuracy, and reliability focus Complete Delivery - Full source code, documentation, and deployment guide Ready to discuss your trading system requirements and deliver professional-grade solutions.

I am a software developer with 13+ years of experience in building high-performance, cross-platform desktop applications using Qt/C++ and PyQt. I specialize in desktop software for video streaming, computer vision, and AI-powered solutions, delivering efficient, scalable, and user-friendly applications for Windows, Linux, and macOS. My expertise includes: Desktop Application Development: Qt, PyQt, cross-platform UI/UX, backend logic, networking Computer Vision & AI: OpenCV, TensorFlow, Keras, real-time object detection, face recognition Video Streaming & Processing: FFMPEG, OpenRTSP, live camera streaming, playback, recording WebRTC & Web Integration: Real-time audio/video apps, chat, and web interfaces Database & Backend: MySQL, PHP, server-side scripting, automation I focus on delivering high-quality solutions that solve real-world problems, optimize performance, and provide seamless user experiences. I am available for short-term projects, long-term contracts, and ongoing support.

With 𝟭𝟰+ 𝘆𝗲𝗮𝗿𝘀 architecting in the .NET ecosystem, I design C# .NET and cloud-native architectures that are built for the 𝟮𝟬𝟮𝟲 reality: scalable across AWS and Azure, secure by default, and wired for AI from day one. Whether you're a founder launching your first SaaS or a CTO staring down a legacy monolith that nobody wants to touch, I bring the technical leadership to turn that vision into something fast and maintainable. What I Actually Bring to the Table: - Legacy Modernization: I've untangled enough "spaghetti" .NET Framework (3.5/4.8) codebases to know that rewriting isn't always the answer.. but when it is, I migrate into clean, modular .NET 8/9 microservices that your team can actually work with. - AI & Automation: From Azure OpenAI to AWS Bedrock, I implement agentic workflows and RAG pipelines that automate the boring stuff and let your team focus on what matters. - Performance Engineering: SQL Server query plans, indexing strategies, cloud cost optimization, I've cut latency and slashed AWS/Azure bills by 30%+ more times than I can count. - Security-First Architecture: Zero-Trust, OAuth2, SOC2-compliant designs for fintech, healthcare, and anyone who can't afford a breach headline. The 𝟮𝟬𝟮𝟲 Stack I Work In: Backend: C#, ASP.NET Core 8/9, MVC, Web API, gRPC, SignalR, Blazor (Server/WASM) Frontend: Angular 19, React (Next.js), TypeScript, Tailwind CSS Cloud & DevOps: Azure (Functions, Logic Apps, Service Bus, OpenAI) · AWS (Lambda, S3, Bedrock) · Docker · Terraform · GitHub Actions · CI/CD · Microservices Architecture · Domain-Driven Design · CQRS · OAuth2 · JWT Data: SQL Server (optimization specialist), PostgreSQL, MongoDB, Vector Databases for AI/RAG pipelines Why 𝟭𝗖𝟰+ Years Matters: I've led teams, rescued failing projects, and shipped for startups and Fortune 500s alike. I speak ROI and Go-To-Market as fluently as I speak CI/CD. You'll not be hiring someone who just writes code, you'll get a technical partner who makes sure your technology accelerates your business instead of holding it back. Available for architectural audits, project rescues, or long-term development. Click 'Message' let's talk about where your project needs to go.

I am an experienced solutions architect in embedded systems, communication protocols and desktop applications domain. Primarily focused on C++. I have contributed to projects involving vehicle bus decoding, ROS based visualization of vehicle environment in 3D, cross platform desktop application development and development of embedded linux applications (including basic kernel driver tweaking). I have also written communication protocol drivers for SCADA systems for RSMP, MQTT and BACnet protocols. I also have experience in CI/CD pipelines using Jenkins and DevOps. I have followed a TDD approach in my professional work and hence am well acquainted with unit testing using GoogleTest. My tool set includes C++, Qt, ROS, CMake, Jenkins, UML, Bash, EB ADTF, Linux, Embedded Linux, device trees, GoogleTest, Deepstream SDK. I also have extensive domain knowledge of vehicle buses like CAN, Flexray, automotive Ethernet and other communication protocols like BACnet, MQTT and RSMP.

Holding a Rich experience in NFC, RFID & Bluetooth integrated solution. I have a skilled team in Device integration in Android, iOS & Desktop application Rich 20+ years of experience in IT organization. Mentor & Certified Scrum Master Solution Provided for Customers: 1. Unique Product Authentication 2. Know Your Customer - Mobile app by Scanning NFC Passports 3. Enterprise Software for Healthcare Industry with collecting information from Medical Device. 4. Inventory Tracking System using RFID / NFC 5. Employee Tracking using Passive & Active RFID 6. Event Management System using NFC 7. Digital Business Card Experienced in Integrating Mobile App (Android / iOS) with major NFC IC's 1. NTAG424 DNA & NTAG424 DNA Tag Tamper 2. NTAG213 / 215 / 216 3. DESFire Module M890 4. Mifare Classic 1K / 4K / 8K 5. Mifare DESFire EV1 / DESFire EV2 6. Mifare Ultralight & Ultralight C 7. M24LR04E-RDW6T/2 8. NFC-TAG-MN63Y1213_2020 Experienced in NFC & Bluetooth connectivity Readers : 1. ACR122U USB reader 2. ACR 1255U-J1 Bluetooth NFC Reader 3. ACR1311U-N2 Bluetooth NFC Reader RFID Device Integration with Cloud via MQTT: 1. [Passive RFID] 4 Port & 2 Port UHF RFID Fixed Reader 2. [Passive RFID] C72 Handheld UHF Reader 3. [Passive RFID] Sanray UHF RFID Integrated Handheld Reader F5009-H 4. [Active RFID] Sanray Active RFID Fixed Reader 5. [Passive RFID] UHF RFID Tag Printer Build applications using RFID UHF Tags: 1. Smartrac R6 DogBone RFID Wet Inlay (Monza R6) 2. Vulcan RFID Foam Backed Wristband (Monza R6) 3. Confidex Carrier Tough Slim RFID Tag (Monza 4QT) 4. Zebra UHF RFID Cards 5. Omni-ID Adept 650P RFID Cards 6. Triathlon Race Timing UHF RFID Sample Tags Expert Consultation in NFC, RFID & Bluetooth - Mobile App Development - iOS & Android - Mobile App Development - Native (Android - Java & Kotlin, iOS - Swift) & Flutter - Mobile App integration with PCB Boards & External Devices such as Weigh Scale - Server Development - C# Dot Net & Python - Build Interactive Website | Mobile App - UI & UX | Logo Design Proven Track Record - Building complete product for clients - Solution Provider - In Handling and Mentoring teams. Strong engineering & professional skills in Software Development Life Cycle (SDLC), Requirements Analysis, Business Analysis and Solution Architecture.