I specialize in performance-critical C++ code, focusing on optimizing hot paths — the parts of your application where execution time actually matters. I go beyond Big-O complexity to analyze real runtime cost, including memory access patterns, allocations, and hidden overhead in abstractions. I identify bottlenecks quickly and refactor code to improve cache efficiency and eliminate unnecessary work. I build cross-platform desktop applications with a strong foundation in Object-Oriented Programming, Data-Oriented Design, and advanced data structures — resulting in code that is efficient, maintainable, and built with performance in mind. I can also support your project with: - containerization [Docker] - scripting and automation [Python / Go] - testing and reliability improvements Additional strengths: - deep understanding of real computational cost (beyond theoretical complexity) - identifying hidden performance costs in STL and abstractions - refactoring from polymorphic designs to data-oriented, cache-friendly structures - explaining complex C++/STL concepts in a clear and practical way

Software programmer with Linux, Windows development knowledge, more than 15 years of experience. C, C++, C#, Assembly, Python, Javascript, Golang, Fortran, Rust, Bash, Powershell. Compilers, debuggers, build tools, repository tools, libraries, frameworks, numerical and data processing.

💡 22 Years of Expertise Across Diverse Technologies, Industries & Marketing Channels 🔍 About Me I’m an accomplished Software Engineer, Developer, and Solutions Architect with extensive experience across multiple programming languages, frameworks, and industries — combining strong technical depth with strategic marketing and SEO expertise to deliver solutions that perform and grow. My career spans over two decades, giving me a rare ability to bridge technology and business — ensuring every system, app, or website I build is optimized for performance, scalability, and discoverability. 🛠 Areas of Expertise ✅ Programming Languages: C, C++, Objective-C, C#, Java, Erlang, VB, ASP, ASP.NET, Perl, Python, PHP, Rust ✅ Frameworks & Technologies: Spring Boot, Laravel, Django, React, React Native, Next.js, Node.js, Xamarin/MAUI, JHipster ✅ Specialties: 🌐 Web Development: WordPress, React/Next.js, Express.js, Laravel, Django, JHipster, Spring, .NET 📱 Mobile Development: Android, iOS, Xamarin/MAUI, React Native 🎮 Game Development: Unreal Engine, Unity, C4 Engine, CryEngine, MonoGame ⛓ Blockchain Development: Solidity/Ethereum, Solana, EOS, TRON ☁️ Cloud Services: AWS, Azure, Google Cloud, Alibaba Cloud 🌍 International Marketing: US, Canada, UK, Australia, Africa & China 📌 Specific Industries: Real Estate, Hospitality, Technology, Blockchain 🌟 Solutions Architecture & System Administration: Windows, Linux, macOS 📈 Digital Marketing Expertise: - Search Engine Optimization (SEO) – Technical SEO, On-Page, Core Web Vitals, Schema - Search Engine Marketing (SEM) – Google Ads, Bing Ads, Baidu, and Social Campaigns - Content Marketing – Strategy, Keyword Research, Content Frameworks, and Funnel Design - eCommerce & Lead Generation – Conversion Optimization, Tracking, and Analytics 🎓 Certifications: - AWS Developer Associate - AWS Solutions Architect Associate - Microsoft Certified Technology Specialist - Google Ads Search Certification 🏅 Awards: Top 5 BlackBerry Developer Award – Research in Motion (2009) 📂 Specialized Expertise 🏠 MLS/IDX Integration & RESO APIs 🔒 Application Security & Data Protection 🏖 Real Estate & Travel Websites 💼 International Business & Cross-Market Strategy ⚙ Software Experience C++, C, C#, ASP.NET, Blazor, Java, PHP, Erlang/OTP, Python, Pascal, Assembly (x86, ARM64), DynamoDB, PostgreSQL, MySQL, MSSQL, MongoDB, React, Next.js, Laravel, Moodle, WordPress, Unreal Engine, Unity, and many more. ✨ Let’s Connect Whether you’re launching a new app, improving SEO visibility, or scaling a complex system, I bring 22 years of engineering excellence and real-world marketing insight to help your project succeed from concept to completion. Let’s build something exceptional together!

I am an experienced C/C++/C# (.NET)/Python/Java/Fortran 90 programmer. I specialize in the development of high performance cryptographic implementations , deep neural networks, desktop application development (both GUI and terminal applications), graphics programming with SDL 2.0 or SFML and OpenGL, network programming using sockets (both BSD sockets and WinSock), multi threading, system security enhancing applications and writing operating system level code for both Windows and Linux operating systems. I am deeply familiar with the Windows API as well as POSIX API, and I have extensive experience working with intricate projects that use the OpenSSL libraries, libAV (core libraries of ffmpeg), libcurl, GMP and many more! I prefer developing cross-platform code and I also have experience in using MPI (Message Passing Interface) via OpenMPI for distributed computing. I love writing efficient, elegant and portable code, that works in the most efficient way possible. I am also a fluent speaker and writer of the English language. If I take up a project, be assured that it will be done with the utmost level of perfection that will make your heart content! Please check out the heartfelt reviews from my clients to understand more about me. I hope to work with you and manifest success in your challenging projects. Thankyou very much for checking out my profile! May God Bless You :)

I’m Blake, a dedicated C# .NET developer with a strong focus on building scalable, high-performance applications. With over a decade of experience, I specialize in ASP.NET/Core backend development, complemented by Angular and React front-end solutions. My background also includes SQL databases such as MSSQL, MySQL, and PostgreSQL, along with DevOps practices across Azure and AWS. I also help businesses leverage modern AI tools and APIs to move faster and operate smarter. This includes integrating GPT, Claude, and other AI models into real-world workflows for automation, document parsing, data extraction, web automation, internal tools, and customer-facing features. Whether the goal is reducing manual work, improving operational efficiency, or accelerating development delivery, I focus on practical AI solutions that create measurable business value. Throughout my career, I’ve worked with clients ranging from startups to Fortune 500 companies, helping them achieve their goals through reliable, well-built technology solutions. I led a software development agency for five years, managed a team of 20 developers, and delivered over 50 successful projects. I now work independently as an individual contributor. I’m passionate about creating robust, production-ready applications and using the right tools, including AI, to help clients build faster and smarter. Let’s work together to turn your vision into reality.

Python Trading Infrastructure Engineer | Exchange Connectivity | Backtesting | Live Execution | GMT+7 I build the infrastructure that makes trading strategies actually work in production: exchange connectors, real-time data pipelines, backtesting engines, and live execution systems. My background is in trading systems engineering, not strategy development. I don't generate alpha, I validate it and build the systems that execute it reliably, fast, and correctly. If you have a strategy that needs to be automated, backtested properly, or connected to a live exchange, that's what I do. ▶ TECHNICAL EXPERTISE ◀ • Exchange connectivity: Binance, ByBit, Coinbase, OKX, Bitget, Interactive Brokers (IBKR TWS) • Trading frameworks: Hummingbot (top-10 OSS contributor) | NautilusTrader | QuantConnect • CEX and DEX connectivity | WebSocket market data | REST order management • Backtesting engines: correctness, performance optimization, realistic fill simulation • Prediction markets: Kalshi, Polymarket • Languages: Python, Cython, C++ • Low-latency optimization: asyncio profiling, network tuning, thread isolation • Strategy types supported: arbitrage, market-making, trend-following, mean-reversion, grid bots • Data: NumPy, Pandas, Dask, Parquet, PostgreSQL ▶️ WHY CHOOSE ME ◀️ 8+ years building trading systems professionally, including 2 years at CoinAlpha (Hummingbot, top-10 OSS contributor), ongoing freelance work across crypto, equities, and prediction markets. Georgia Tech M.S. Computer Science, 3.8 GPA. Top Rated on Upwork, 5-star rating. Keywords : Hummingbot, Nautilus Trader, NautilusTrader, Backtesting, Optimization, Latency, Quant, Interactive Brokers, IB, IBKR, TWS, Lean, Quantconnect, Quant Connect, QuantConnect, Trader, Indicator, ForEx programmer, code an Indicator, Python, C++, Cython, Automated Strategy, Quant Dev, Historical Data, Strategy Analysis, Performance Analysis

19+ Years of Professional Experience in the Software Industry as Technology Consultant/Senior Software Architect/Senior Software Developer in the Area of System Analysis, Design & Development using industry Best Practices and Patterns. I have successfully delivered numerous projects, continuously driving innovation and excellence. 👉 Experience & Skills: ✅ Mobile App Development (Native/Hybrid): I bring extensive experience in developing mobile solutions using cutting-edge technologies such as Next.js, React, Angular, Node.js, ASP.NET Core, C#, Flutter, IONIC, Swift, XCode, and Clean Architecture, ensuring seamless and efficient app development. ✅ App Development & Deployment: Specialized in building applications from scratch and deploying them on IIS and Azure platforms. Expertise includes working with Microsoft Azure services like App Services, Web Jobs, Azure Functions, and Azure Storage (Blob & File Share). ✅ API Integrations: Proficient in integrating a wide array of APIs from leading service providers, such as FedEx, UPS, DHL, EasyPost, Amazon, AXIS, USPS, Pitney Bowes, QuickBooks, and DocuSign, to enhance functionality and streamline business operations. ✅ Payment Gateway Integrations: Strong expertise in integrating secure payment gateways such as xCharge, PieConnect, Authorize.Net, and ACH, ensuring smooth and secure transaction processing. ✅ Front-End Development: Solid knowledge of front-end technologies including Flutter, Angular, IONIC, jQuery, HTML5, Bootstrap, and TypeScript, enabling me to build dynamic, responsive, and user-friendly interfaces that seamlessly integrate with backend functionality. ✅ DevOps & Version Control: Skilled in version control systems such as GIT, SVN, and TFS to manage code repositories and facilitate team collaboration. Well-versed in DevOps practices for Continuous Integration/Continuous Delivery (CI/CD), automating deployment pipelines for smooth, efficient releases. ✅ Reporting Tools: Extensive experience working with SQL Server Reporting Services (SSRS), Crystal Reports, Telerik Reports, DevExpress/DevExtreme, and Telerik Kendo, delivering tailored reporting solutions that meet client requirements. ✅ ETL Processes & SSIS: Expertise in developing complex SSIS packages for efficient ETL (Extract, Transform, Load) processes, ensuring seamless data integration and transformation across systems. ✅ Mobile App Development (Hybrid & Native): Skilled in building both hybrid and native mobile applications for iOS & Android using Flutter, Angular, and IONIC, delivering seamless user experiences across all devices. ✅ Database Optimization & Performance Tuning: Adept at optimizing large databases with millions of records, resolving performance issues, and delivering actionable solutions that improve system operations and efficiency. 👉 Technical Proficiencies: 🚀 Languages & Frameworks: Next.js, React, Angular, Node.js, C#, .NET Core, Blazor, ASP.NET, MVC, Web API development (RESTful & SOAP). 🚀 Front-End Technologies: Flutter, Angular, IONIC, jQuery, HTML5, Bootstrap, TypeScript for building responsive, scalable, & dynamic web/mobile applications. 🚀 Version Control & DevOps: GIT, SVN, TFS, with a strong focus on CI/CD practices for continuous integration and deployment. 🚀 Databases & Reporting: SQL Server, Entity Framework, LINQ, Telerik Reports, SSRS, Crystal Reports. 🚀 Testing & Debugging: Experience in unit testing and proficient with tools like Postman and Fiddler for testing and debugging APIs. ↪️ Why should I be the best --✅ 100% client satisfaction. --✅ 24/7 Availability --✅ Strong technical skills and business solutions provider. --✅ Top-notch communication and responsiveness. You will always feel in control of the project. --✅ Well-defined processes to keep you updated on each phase of development. --✅ Attitude with No excuses, just get it done. Happy to Help You!

C# .NET Developer | 7+ Years of Experience Hello! I'm Fatima, a senior C# developer with 7+ years of experience building, upgrading, and maintaining applications using WPF, ASP.NET MVC, and .NET technologies. I specialize in helping businesses modernize their legacy systems, improve performance, and deliver reliable, user-friendly desktop solutions. Recently, I’ve also been learning React and TypeScript to expand my expertise into modern web development and create seamless full-stack solutions. What I can do for you: ✅ Upgrade and optimize legacy WPF applications ✅ Implement multi-threading and background services for better performance ✅ Integrate secure data storage, encryption, and authentication mechanisms ✅ Design intuitive, modern UI/UX for desktop software ✅ Provide technical consultation and long-term support Recent highlights: ✅ 2+ years working with a long-term Upwork client, developing innovative WPF solutions ✅ Built custom desktop tools for data processing, search functionality, and system automation ✅ Solved complex threading and optimization issues in large-scale desktop systems ✅ Created my own React + TypeScript + .NET portfolio site to showcase my work and explore modern web frameworks My approach: I focus on understanding your goals first, then delivering clean, scalable, and maintainable code with proactive communication. Let’s discuss how I can help make your project a success!

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.

35 years of experience in software engineering complemented by solid knowledge of computer science, mathematics and electrical engineering.