Yaroslav C.

🚀 I build high-performance C++/.Net software solutions customized for Web, Desktop, and Office Add-in applications. ✅ With 💯% positive feedback, 🌟9000+ hours, and 🌟30+ challenging projects successfully completed on Upwork - plus numerous projects delivered previously - I bring over 22 years of software development experience to every project. Whether you're developing sophisticated web applications, powerful desktop software, advanced Office add-ins (VSTO, Office JS API, OpenXML), or specialized software for CAD and 3D-printing systems, I consistently deliver solutions tailored precisely to your business needs. ⏰ Flexible to work within U.S. or European business hours, ensuring smooth collaboration and communication. Core expertise: ⚡ High-Performance & Real-Time Systems: Custom solutions for latency-sensitive applications and complex data pipelines. Performance optimization, multi-threaded and asynchronous code, Boost/Boost.Asio for high-efficiency networking. 📈 Trading & Finance Systems. Expertise with Rithmic C++ SDK (R | API C++), FIX protocol, real-time market data processing, and order execution for high-frequency and medium-frequency trading. 🔐 Cybersecurity. Designing and developing secure architectures, threat-detection systems, public-key infrastructures (PKI), secure license servers, encryption libraries, and secure communication protocols. 🌐 Full-Stack Web Development: React, ASP.NET Core, RESTful APIs, PostgreSQL, Redis, MongoDB, WebSockets, Azure, AWS. Skilled in integrating third-party APIs and building scalable backend infrastructure. ⚙️ Advanced C++ & C# Engineering: System-level development, cross-platform libraries, SDKs, and Office automation. Proficient in building stable, secure, and efficient codebases. 🌐 Cross-Platform & Windows-Specific Platform Development Experience building cross-platform C++ / .net core, Windows-specific solutions using WinAPI, ATL, Cloud Sync Engines 🖥️ Desktop Applications: WPF, WinForms, MFC, ATL and modernization of legacy Windows applications. 📎 Office Add-ins: VSTO, Office JavaScript API, and deep OpenXML integrations for document processing and automation. 📐 CAD & 3D-Printing Software: Plugins and custom tools for CAD and additive manufacturing workflows. ☁️ Cloud Platforms: Deployment and integration with AWS and Azure, including containerized and serverless environments. 💻 Languages: C++, C#, JavaScript/Typescript, Python 🔄 Modernization: Transforming legacy systems into scalable, maintainable modern solutions. 🌟 Check out my client feedback - it speaks even louder than my introduction. Let's discuss your Web, Desktop, Office Add-in, or specialized CAD/3D-printing software needs - I'm ready to help you!