Hire the Best QT Developers
in Ukraine

Are you looking for a professional software developer who can solve unsolved tasks, is highly organized, and has deep knowledge and experience developing optimized and robust code? I'm an experienced and dedicated professional with over 16 years of experience in designing, developing, implementing, and supporting software solutions. My aim is to create fast, lightweight, and highly optimized solutions that perform well with minimal use of system resources. My favorite kind of work is solving unsolvable problems. My main skills are fast learning and ongoing professional development. Last two years I made mostly cross-platform desktop/mobile applications on the Qt framework using C++, QML, and CMake. Difficult unsolvable problems are my favorite job. And I am sure that my experience, knowledge, and enthusiasm will help to solve any of your problems.

Hi, my name is Arsen. I’m a Senior C++ and Python developer with 5+ years of experience building software for Linux, Windows, and embedded systems. I focus on clean, efficient, and reliable solutions for low level, backend, and performance critical tasks. What I bring to projects: • C/C++ development: STL, Boost, Boost ASIO, Qt, WinAPI, OCCI, V8, POSIX, multithreading • Python development: automation tools, data pipelines, backend logic, Django • Database engineering: Oracle, SQLite, MongoDB, data export tools, batch processing, custom type conversion • Linux systems programming: networking utilities, driver level interaction, Linux kernel headers, OpenWRT, desktop and CLI tools • Wireless and low level networking: Generic Netlink, nl80211, libnl/libmnl, Wi Fi scanning tools, protocol and frame parsing • Reliability and performance: profiling, transactional workflows, data integrity focused design, Dockerized builds, CI/CD with TeamCity • Cross platform delivery: Linux and Windows applications, Make, CMake, Conan, Git/SVN, GDB, Valgrind, Doxygen, Bash I have built tools ranging from high performance Wi Fi scanners in C that interact directly with the Linux wireless stack, to cross platform C++ command line utilities that export Oracle data into SQLite with transactional safety and performance profiling. I am comfortable working close to the system, optimizing throughput, handling large datasets, and designing software that is maintainable and stable in production. Clients usually trust me with complex backend, systems, and infrastructure related tasks where performance, correctness, and long term reliability matter. If you are looking for a developer who can work on C++, Python, Linux internals, networking, or data heavy applications, let’s talk. 🙂

If you want “no rework” engineering: I am Full Stack Developer React Node (Senior) with ownership, speed and quality ✅ 𝟏𝟑,𝟎𝟎𝟎+ 𝐡𝐨𝐮𝐫𝐬 𝐰𝐨𝐫𝐤𝐞𝐝 with a strong focus on business outcomes and quality ✅ 𝟑𝟎+ 𝐩𝐫𝐨𝐣𝐞𝐜𝐭𝐬 𝐝𝐞𝐥𝐢𝐯𝐞𝐫𝐞𝐝, turning ideas into working software from start to finish ✅ 𝟏𝟎𝟎% 𝐉𝐨𝐛 𝐒𝐮𝐜𝐜𝐞𝐬𝐬 𝐒𝐜𝐨𝐫𝐞 on Upwork - Expert-Vetted (Top 10 Worldwide) Hey, I’m 𝐌𝐢𝐜𝐡𝐚𝐞𝐥 - a business-oriented software engineer, senior full stack developer. As a full stack software engineer I help startups and SMBs turn their ideas into valuable digital products. Fast, stress-free, and with full delivery ownership. I also work as a React developer / Front end developer (Front end developer React) and a backend developer on node.js (node) - often in MERN stack and full stack node.js setups. Day-to-day I build full stack node.js react products. ⭐⭐⭐⭐⭐ "I never write reviews for anything, but Michael and his team were just so great that I had to. From the very beginning, Michael stood out with how organized, responsive..." - Chris, $16K+ full stack react node project ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 𝐒𝐤𝐢𝐥𝐥𝐬 & 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬 which I have expertise as a Full stack node.js react developer ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▸ Backend: Node, Express, Fastify, PostgreSQL, MongoDB ▸ Frontend: React, Next ▸ Mobile: React Native, Flutter, Swift, Kotlin ▸ Design: SaaS & Product Design, Web & Mobile Interfaces ▸ DevOps: AWS, Azure, GCP, Vercel ▸ CMS: Contentful, Strapi, Sanity I deliver end-to-end web apps as a full stack react developer, combining clean UI work with reliable backend architecture. On the server side I work as a full stack developer node / full stack developer node js, building APIs, auth, and integrations; on the client side I build full stack react interfaces and full stack react js components using javascript, react, and nextjs. When a product requires a unified stack, I seamlessly connect frontend and backend using react node, and I’m fully comfortable stepping into full stack developer mern projects. This approach reflects true react full stack delivery - I take full ownership as a react full stack developer, ensuring features are scalable, maintainable, and production-ready. When needed, I step in as CTO and software project manager (and sometimes an ERP consultant for internal ops): architecture, roadmap and execution- plus business consulting focused on outcomes, timelines, and budgets. I’m comfortable in production: database design, migrations, performance, and dba-style care; nginx basics; payments with stripe; integrations with shopify; AI features via openai. I’ve shipped niche verticals too - med spa platforms, web3 apps, trading software dashboards, and even website development perfume projects. I’ve also implemented playful mechanics like a coin flip while keeping compliance in mind (including gambling-related UX constraints). ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬 𝐈 𝐡𝐚𝐯𝐞 𝐰𝐨𝐫𝐤𝐞𝐝 𝐰𝐢𝐭𝐡 as Full stack Developer React Node ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▸ Logistics & Supply Chain ▸ Fintech & Crypto ▸ Health & Wellness ▸ Food & Restaurant Management ▸ Real Estate ▸ Social Media ▸ Education & E-Learning I ship modern website work as a web developer / full stack web developer / full stack website developer, support CMS builds as a wordpress developer (front end wordpress) or with drupal. I also deliver outside JS when it fits: laravel and full stack developer laravel (including laravel vue), ruby on rails, python work and python full stack developer engagements; plus enterprise builds in full stack .net and senior full stack .net. I collaborate closely with ui ux / ui/ux teams - sometimes acting as a ui ux web designer partner, pairing with a ux designer. I can also help with intercom setup and intercom developer work. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ My expertise as a Mobile App Developer / Full stack software developer ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ I build production-ready apps with react native (as a react native developer / react native full stack developer) and can also deliver via flutter full stack developer workflows when it fits the product. I’ve supported niche requirements too, including qt developer, revit developer, and xamarin developer tasks when needed. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📩 LET’S CONNECT ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ If you want a calm, low-risk full stack engineer / full stack react node who can take ownership from idea → production, message me. No pitch decks, just pure value 𝐖𝐚𝐫𝐦 𝐑𝐞𝐠𝐚𝐫𝐝𝐬, 𝐌𝐢𝐜𝐡𝐚𝐞𝐥

We build high-performance, low-latency applications using C++20/23/26, taking complex systems from architecture to production and scaling them to enterprise-grade products. 🥇100% Job Success Score | 1,000+ projects | 32+ years in Software Engineering. Our team of engineers and data scientists specializes in systems programming, embedded firmware, and real-time data processing. We help you turn complex concepts into market-ready platforms, bridge the gap between scientific methods and robust software development to deliver hardware-optimized solutions that drive ROI. Besides development from scratch, we specialize in Legacy Modernization, refactoring outdated C/C++ codebases into modern, memory-safe architectures, and optimizing existing systems to reduce technical debt and improve stability. ✅ Core Services: 🔹Full-cycle Systems Development: PoC, high-load architecture, and first-release deployment. 🔹Staff Augmentation & Dedicated Teams: Seamlessly extending in-house capabilities with C++ experts. 🔹Low Latency & HFT: Optimizing mission-critical trading platforms and real-time data engines. 🔹Embedded & Firmware: Custom driver development and firmware for ARM64, STM32, and IoT devices. 🔹Performance Refactoring: Enhancing existing systems by moving bottlenecks from high-level languages to optimized C++. 🔹Ongoing Support: Continuous optimization ensuring your system adapts to new hardware and market demands. 📊 Notable Project Outcomes: 🔹High-Frequency Trading: Optimized a core engine using C++23, reducing task overhead by 50-100ms and improving parallel processing. 🔹IoT & Automotive: Developed a real-time monitoring system for temperature and location tracking, reducing cargo spoilage by 15%. 🔹Healthcare & AR: Created a Telehealth app with AR-based orthopedic monitoring and high-speed image processing. 🔹AdTech SaaS: Built a cross-screen advertising platform managing rich media delivery across millions of digital screens. 🔹Education & Simulation: Optimized a 3D anatomy platform, reducing data load by 40% through custom C++ rendering logic. 🔑 Technical Capabilities: 🔹Languages & Standards: C++23 (latest MSVC/Clang/GCC), C++26 (draft features), Modern C# 13, Python Integration. 🔹Libraries & Frameworks: Qt 6.x, Boost, STL, gRPC, Protocol Buffers, OpenCV, POCO. 🔹Hardware & OS: Windows (WinUI 3), Linux (Kernel/Drivers), ARM, STM32, AVR, PIC. 🔹Build Systems & Tools: CMake (de-facto standard), Ninja, Conan, vcpkg, Docker, GDB/Valgrind profiling. We utilize AI where it adds measurable value, reducing operational time by up to 50% without compromising architecture decisions, cybersecurity, or code quality. ✅ Why Clients Choose NIX: 🏆 32+ years in Enterpise Development | 3,500 projects | 100% Job Success. 🛠 Full-Cycle Expertise: From bold idea to enterprise-level application. ⚡ Fast & clear communication: Always aligned & transparent. 📅 Available to start immediately. Ready to optimize your system for maximum performance? Let’s schedule a 30-minute technical discovery call. We’ll perform a high-level feasibility check on your architecture, discuss the most effective optimization strategy, and outline a clear roadmap to production.

👋Hi! My name is Vladyslav, I am a C/C++/Python developer(Backend, Frontend, Embedded) 📍 WHY ALWAYS ME? - Full commitment to your project - Willingness to use new technologies and grow together - Attention to details and requirements - Adaptability and flexibility - Clear and reliable communication 🎯 MY GOAL: To build digital products that solve real user problems — products that are enjoyable to use and ones people want to return to again and again. 🤝 I am ready to become part of your project and take it to the next level together.

With more than 20 years of experience in the IT industry, I have developed a solid foundation in software architecture, design, and development. My expertise spans across multiple programming languages and frameworks, including C/C++, Qt/QML, C#/.NET, JavaScript, Node.js, Python, and Golang, allowing me to create robust web services, backend systems, as well as client-server and rich desktop and mobile applications. My background also includes strong capabilities in database architecture and design, specifically with PostgreSQL. I also possess extensive experience working with REST APIs, MS Bot Framework, and neural network algorithms. My proficiency in managing foreign customer relationships, along with my excellent command of English and negotiation skills, make me a valuable asset to any team. I am a self-motivated leader with a penchant for project management. I have a proven track record of effectively solving complex problems and working well in team environments. I enjoy proposing and implementing universal solutions that benefit everyone involved, and I am committed to maintaining my physical fitness in order to optimize my work performance.