As an Electrical/Electronics Engineering graduate and passionate IoT/AI enthusiast, I bring nearly seven years of hands-on experience in embedded systems, Arduino, ESP, and sensors. Throughout my career, I have adeptly coded microcontrollers, including Arduinos, ESP Family, STM32/GD32, and Raspberry Pi, seamlessly integrating them with various hardware modules such as RFID, GSM, Bluetooth, GPS, and LCDs. I have spearheaded core electrical engineering projects leveraging advanced machine learning algorithms like Decision Trees and Clustering for system optimization and efficient design. My proficiency extends across programming languages including C/C++, Python, and MATLAB, enabling me to tackle diverse challenges easily. Additionally, my expertise encompasses a wide array of domains ranging from probability and statistics to signal analysis, digital logic design, power system analysis, and more. I boast strong proficiency in MS Office tools, leveraging them adeptly for comprehensive project documentation. Notable projects in my portfolio include: - Disaster minimization through Home automation - Efficient islanding detection techniques - Clustering analysis for power grids - WiFi-based relay control system - Client-server message exchange utilizing the HTTPS button - MQTT pump controller implementation - Energy meter data logging solutions - Automatic flushing system design for settling basins With a blend of theoretical knowledge and practical skills, I am poised to deliver innovative solutions and drive excellence in the field of embedded systems and IoT.

I architect high-performance enterprise solutions that bridge the gap between robust software engineering and advanced intelligence, recently demonstrated by reducing deployment times by 40% through automated CI/CD pipelines. As a strategic partner, I do not simply write code; I deliver Data Analysis and scalable software ecosystems that drive ROI. My approach combines the stability of C# .NET and Microsoft SQL Server with the predictive power of Python Machine Learning and Artificial Intelligence, ensuring your infrastructure is secure, scalable, and primed for data-driven growth. • Scaled cloud infrastructure on Microsoft Azure and AWS to handle 1M+ requests/day using Kubernetes. • Engineered a high-frequency trading module using C++ that improved data processing speed by 30%. • Designed interactive Dashboard reporting using Microsoft Power BI and Looker Studio to visualize complex datasets. • Developed a cross-platform Smartphone application integrated with a custom AI Chatbot for 24/7 customer support. • Delivered over $100k in value on Upwork with a 100% Job Success score across 2,500+ hours. • Architected a Natural Language Processing (NLP) and AI Agent Development workflow to automate Data Extraction from unstructured text. • Built a Deep Learning model for predictive Data Science analytics, resulting in a 15% increase in user retention. • Implemented a robust ETL Pipeline to migrate legacy data from Microsoft Excel to secure SQL databases. My technical toolkit is comprehensive, spanning Full Stack Development with ASP .NET Core, Angular, and React, to specialized Data Engineering. I possess expert-level proficiency in SQL, Data Scraping, and Data Annotation workflows. Whether you need a Web Application, API Integration, or a complex AI Development project involving Deep Learning, I ensure seamless execution. I am equally comfortable managing Front-End Development with HTML5, jQuery, and TypeScript as I am handling Back-End Development and Data Visualization. Let's schedule a consultation to discuss how we can elevate your technical infrastructure and Data Analytics strategy.

I help companies build reliable, high-performance C++ software — from multithreaded systems and performance optimization to AI-powered features that scale in production. I specialize in modern C++, system design, concurrency, Qt, networking, and performance-critical applications. I help teams solve complex engineering challenges such as improving application speed, designing robust architectures, debugging difficult issues, and building maintainable software. With 10+ years of software development experience, I have worked on challenging projects across desktop applications, embedded systems, cross-platform software, and backend technologies. My experience includes C++, Qt, Linux, Windows, macOS, gRPC, Protocol Buffers, multithreading, debugging, and optimization of complex systems. My approach: • Understand the business and technical problem before writing code • Design solutions that are reliable, maintainable, and scalable • Write clean, efficient C++ following modern best practices • Communicate clearly with regular updates and transparent progress I focus on delivering production-quality software, not just completing tasks. Whether you need performance improvements, a new C++ feature, architecture guidance, or help solving a difficult technical problem, I can help. If you have a challenging C++ project and need an experienced engineer who can work independently and deliver high-quality results, feel free to send me a message.

.NET Developer with over 15 years of experience. I help companies build scalable .NET backend and frontend. Worked on projects for Microsoft and Shell. 97% of my clients are satisfied with my work.🧑‍💻Interested in building scalable enterprise and startup systems. Let's create powerful software together! Are you in search of a Senior .NET Developer who can build, scale, and maintain resilient software systems for web, desktop, and cloud-based applications? You’re in the right place. I’m Eugene - a seasoned .NET developer with deep expertise in full-stack architecture, Azure-based services, REST APIs, relational databases, and scalable backend platforms. Over the years, I’ve taken the lead on mission-critical software projects for top-tier clients, including Microsoft and Shell. I’ve delivered a wide array of business solutions using C#, ASP.NET Core, .NET Stack, Entity Framework, SQL Server, PostgreSQL, WPF, WinForms, and Azure App Services. My portfolio includes scalable web platforms, API-driven microservices, high-performance desktop tools, and cloud-native architectures powered by Docker and CI/CD workflows. 👨‍💻 Areas Where I Excel: ✅ Full-Stack .NET Development I craft backend and frontend solutions with ASP.NET Core, .NET 6/8, MVC, Razor Pages, and Web API. I also bring experience with Blazor, Angular, and React, following clean architecture and SOLID design. ✅ Desktop Application Engineering I build Windows apps using WPF, WinForms, MVVM, and Telerik controls. These include hardware integrations, PDF/image processing, and offline functionality. ✅ API Development & Integration I create and connect REST APIs with third-party services such as Stripe, Twilio, SendGrid, and CRM systems. I also develop custom APIs for tools like print services and internal dashboards. ✅ Database Architecture & Optimization I design performant database schemas and manage SQL Server, PostgreSQL, MySQL, and Cosmos DB. I focus on query performance, indexing, and schema evolution. ✅ Cloud & DevOps I deploy apps using Azure App Services, Functions, and CI/CD with GitHub Actions or Azure DevOps. I containerize services with Docker and orchestrate deployments via Kubernetes. ✅ Microservices & Distributed Architecture I build .NET Core microservices with RabbitMQ, Kafka, and Ocelot. These systems serve web and mobile platforms with real-time and asynchronous communication. 🔍 Key Project Highlights: iGaming Platform: Built a real-time casino system using .NET Core, SignalR, Kafka, ScyllaDB, ClickHouse, PostgreSQL, ELK stack, and Power BI. Deployed via Docker on AWS. Loan Automation: Delivered a full-cycle loan platform with .NET Core, OData, EF Core, Azure Service Bus, Hangfire, CosmosDB, Angular, and Power BI. App Marketplace: Developed a microservice-based SaaS platform with RabbitMQ, Stripe, Angular 6, Ocelot, Autofac, and SQL Server. Fleet ERP: Built WPF/Angular tracking ERP with EF6, SQL Server, MEF, GIS, and modules for driver behavior, fuel tracking, and maintenance. Insurance System: Created a UBI platform on ASP.NET Core, AngularJS, Kendo UI, and MS SQL for fraud detection and claims processing. Outlook CRM: Developed CRM integration for Outlook using ASP.NET MVC, AngularJS, Kendo UI, Azure Services, and hosted on IIS. Logistics ERP: Led development of a WPF .NET AngularJS ERP for transport tracking, satellite communication, and business ops. Medical Monitoring: Built a diagnostics app with ASP.NET MVC, DurandalJS, EF, and MS SQL. Hosted securely via IIS. Delivered enterprise-grade .NET solutions: real-time, cloud, ERP, CRM, fintech, and diagnostics systems. 🛠️ My Technical Toolbox: I specialize in C# and the .NET ecosystem, including .NET Core, .NET Framework, Web API, MVC, and WinForms. I rely on EF and LINQ for data access and schema control. My database experience covers MS SQL, PostgreSQL, MySQL, MongoDB, Redis, and Cosmos DB. I manage deployments on AWS and Azure, using Azure DevOps, Docker, and Git. For UIs, I use WPF, Blazor, Angular, and React with TypeScript. I also implement secure CI/CD, API integrations, and scalable infrastructure. Why Teams Work with Me: ✔️ I have over 15 years of professional engineering experience (more than 5 years of experience) ✔️ I possess expertise in both cloud and desktop software solutions ✔️ I have a proven ability to deliver enterprise-level applications ✔️ I possess an in-depth knowledge of DevOps and backend performance tuning ✔️ I can provide AI chatbot (AI Agents) development and workflow automation. ✔️ I have a high ownership, transparency, and quality focus ✔️ My English is fluent, and I can work both with international teams and independently. I collaborate with clients who value architecture, efficiency, and clean code. Whether your project is just starting or mid-scale, I bring clarity, experience, and technical strength to push it forward. Let’s connect and bring your vision to life with robust .NET development.

I help companies modernize business-critical .NET systems and add practical AI automation without putting live workflows at risk. My work covers C#/.NET, Azure, APIs, Microsoft Graph, OpenAI, Teams bots, and legacy migrations. I lead DilyaSoft, a Microsoft partner focused on .NET, Azure, and AI delivery. I help companies modernize business-critical .NET systems and add practical AI automation without putting live workflows at risk. My work covers C#/.NET, Azure, APIs, Microsoft Graph, OpenAI, Teams bots, and legacy migrations. On Upwork: $800K+ earned, 19,500+ hours, Top Rated Plus, and 100% Job Success. Recent work: • Led a 1,389-hour VB6 and legacy ASP.NET modernization into C#/.NET Core. The client highlighted the staged migration, production stability, API restructuring, logging, monitoring, and Azure DevOps CI/CD. • Extended an existing Umbraco CMS with 12+ reusable components and 8 custom content types. The client reported about 40% faster publishing and roughly 25% fewer content-related support requests after rollout. • Built and stabilized C#/.NET API integrations, Microsoft Teams and Slack automation, and Azure OpenAI features for SaaS products. I can take ownership of: • C#/.NET and ASP.NET Core architecture and development • Legacy application assessment and phased migration • Azure, Azure DevOps, SQL Server, and API integration • Azure OpenAI, RAG, AI agents, Microsoft Graph, and Teams/Slack bots • Technical discovery, delivery planning, and engineering oversight For larger projects, I stay responsible for architecture and delivery and can bring in DilyaSoft engineers when the scope needs more than one senior developer. A good first step is usually a paid assessment. I review the current system, identify the main risks, and give you a scoped first milestone. Send me the stack, the bottleneck, and the outcome you need, and I will tell you what I would inspect first.

I help companies build fast, reliable, and maintainable software with Rust and C++ across desktop, mobile, and backend environments. My focus is on performance-critical applications, native systems, and cross-platform products that need to work cleanly on Windows, macOS, Linux, iOS, and Android. I’m comfortable taking a project from architecture and implementation to debugging, optimization, release, and long-term maintenance. What I can help with: Rust and modern C++ development Cross-platform desktop and mobile apps Native libraries, SDKs, and system-level components Performance optimization and memory/concurrency issues API integration and backend connectivity Codebase refactoring, stabilization, and bug fixing Build systems, CI/CD, and release workflows I care about writing clean code, communicating clearly, and delivering solutions that are practical in production, not just technically interesting. Whether you need a new product built from scratch, a legacy C++ codebase improved, or a Rust migration done safely, I can help move it forward. If your project needs strong native engineering with a product mindset, I’d be glad to work with you.

I build custom C# / .NET software for businesses that need reliable desktop applications, internal tools, and practical workflow solutions. My main experience is in C# backend solutions for business software. I work with C#, WPF, MAUI, ASP.NET Core, Razor, MVC, MVVM, SQL, Entity Framework, and Web API, and I’m also interested in Blazor-based internal applications. I’m a good fit for projects involving internal tools, workflow systems, document generation, printing features, integrations, and software that supports day-to-day operations. I work well with MVP prototypes and milestone-based projects where the goal is to turn a business need into a practical working solution. I can take ownership of a project communicate clearly and make practical decisions to keep development moving. I can also help refine requirements as the project evolves. In many business applications, the best solution becomes clearer during implementation, and I’m comfortable helping shape that process while keeping the work structured and aligned with the client’s goals. I’m especially interested in .NET applications for internal platforms, admin tools, business automation, and AI-assisted workflow solutions where the technology supports a real business need. I usually prefer fixed-price or milestone-based projects when the scope is clearly defined, because it keeps the process transparent and predictable for both sides. If you need help building, improving, or supporting a .NET desktop application, internal business tool, or custom software solution, I’d be glad to discuss your project.

With 20+ years of industry experience (10+ years in embedded systems), I build high-performance real-time video and computer vision solutions. I specialize in: RTSP, WebRTC, and low-latency streaming GStreamer, FFmpeg, OpenCV pipelines Embedded Linux development (Raspberry Pi, Orange Pi, Jetson) Multi-camera systems, video recording, and synchronization AI-based video analytics (YOLO, RKNN, edge AI) I have delivered production-grade systems including: Real-time multi-camera streaming and recording platforms AI-powered video analytics solutions Embedded vision systems with hardware acceleration End-to-end video pipelines (capture → process → encode → stream) My focus is always on performance, reliability, and scalability — especially in resource-constrained embedded environments. If you need a practical expert who can bridge camera hardware, video pipelines, and real-world deployment, I can help.

I’m a senior software developer from Portugal with more than 20 years of experience building commercial desktop and mobile applications. I help teams build, stabilize, refactor, and extend products that involve real technical complexity. My work is focused on desktop and mobile software where senior technical judgment matters: Qt/C++ applications, native iOS and Android apps, performance-sensitive features, media and audio/video pipelines, computer vision, hardware integration, OS-level behavior, and long-term maintainability. I have worked on commercial products used by real customers, including projects such as Rocketbook - Document Scanning, Triller - Music Video Social Network, ROVR Radio - Audio Production & Dashboard, Toby - AI Real-Time Audio Translation, iContact - Camera Widget, VideoShop - Video Composition, iGreet - Augmented Reality Greeting Cards, LeanStreamer - Multiple Audio Encoding Streaming Tool, BigRoom - Automated AI Editor, and other desktop and mobile applications that required reliable implementation and careful technical decision-making. Clients usually hire me when they need help with: • building a desktop or mobile product properly from the ground up • refactoring an existing codebase without unnecessary rewrite risk • solving platform-specific issues that are blocking progress or release • implementing complex native features involving camera, audio, video, files, hardware, or OS APIs • improving architecture, maintainability, performance, and stability • adding senior technical depth to an existing team or codebase My core expertise includes Qt/C++, desktop software, native iOS and Android development, software architecture, refactoring, performance optimization, media processing, computer vision, and hardware or platform-level integration. I’m especially well suited for products that already exist and now need to be improved carefully. That may mean stabilizing a codebase, modernizing architecture, solving difficult technical issues, or extending the product in a way that remains clean and maintainable. I care about building the right foundation early, keeping the codebase understandable, and making technical decisions that still make sense in the long run. If your product already exists and needs senior technical help to move forward safely, I’d be glad to discuss it.

Hello! I am expert Backend Developer with almost 20 years of experience in backend, Android mobile, desktop apps, apps for embedded devices, ERP apps and web development. Proficient in developing applications in wide range of areas, including business applications and database management. Have high attitude expertise in Linux OS management, including building automated servers with set of services/tools for different purposes, virtualization tehcnologies like KVM/libvirt, containerization technologies like LXC, Docker, Kubernetes. What I can do: - Planning and implementing the app’s architecture and features. - Writing apps from the very scratch and further support. - Code Review, Fixing and supporting the apps written by others. - Working with a team of developers or solo. Technical Skills: * Languages and Frameworks: Java (Spring, Quarkus, Dropwizard....), Kotlin, C, C++, Qt, Rust, Go, Python (Django), JavaScript, PHP * Platforms: Backend, Android, Linux (Fedora, RedHat, CentOS, Ubuntu) * Technologies: Docker, Kubernetes, CI/CD, Mobile Development, Docker, KVM, libvirt, IT infrastructure monitoring tools, AWS services, GCP * Database Management: PostgreSQL, SQLite, MySQL.... - I'm open to working with big and small companies and individual clients. - I'm comfortable signing an NDA. - Prefer long-term collaboration. - Ready to work 30-60 hours per week I'm open to various projects and would love to show you my creative side too. My commitment to continuous learning keeps me updated with the latest trends and technologies, allowing me to bring cutting-edge solutions to your projects and better expreince. I am giving high attention to details, ready to resolve complicated and complex challenges, always tend to offer most efficient solution. Thanks for your time Regards Rafael S.