With 𝟏𝟎+ 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞, 𝟐𝟎𝟎+ 𝐥𝐢𝐯𝐞 𝐚𝐩𝐩𝐬, and $𝟐𝟎𝟎𝐊+ 𝐞𝐚𝐫𝐧𝐢𝐧𝐠𝐬 𝐨𝐧 𝐔𝐩𝐰𝐨𝐫𝐤, I help startups, founders, and businesses turn ideas into 𝐩𝐨𝐰𝐞𝐫𝐟𝐮𝐥, 𝐬𝐜𝐚𝐥𝐚𝐛𝐥𝐞 𝐦𝐨𝐛𝐢𝐥𝐞 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 using Flutter, FlutterFlow, iOS, Android, React Native and Xamarin. I focus on building apps that are: ✔ Fast ✔ Scalable ✔ User-friendly ✔ Ready for real-world growth 💡 𝗪𝗵𝗮𝘁 𝗜 𝗖𝗮𝗻 𝗗𝗼 𝗙𝗼𝗿 𝗬𝗼𝘂 ✅ Build cross-platform apps (iOS & Android) using Flutter & FlutterFlow ✅ Convert your website or idea into a mobile app ✅ Fix, optimize, or scale your existing app ✅ API, Firebase & payment gateway integration ✅ Modern UI/UX that users love 🏆 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲 ✔ Top Rated Plus Freelancer ✔ 100% Job Success ✔ 100+ 5⭐ Reviews ✔ 9000+ Hours Worked ✔ Worked with Startups to Fortune 500 companies I don’t just build apps — I help you "launch, grow, and succeed". 📱 𝗔𝗽𝗽𝘀 & 𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀 ✔ On-demand / Uber-style apps ✔ Healthcare & fitness apps ✔ E-learning & video platforms ✔ Travel & booking apps ✔ Real-time & location-based apps ⚙️ Skills & 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸 Mobile App Develoment | Native App Development | Hybrid App Development | Flutter App Development | iOS App Development | Android App Development | Figma | UI/UX Designs | Swift | Swift UI | Kotlin | React Native | Flutter | FlutterFlow | Xamarin | .NET Core | React | Node.js | Firebase | REST APIs | Payment Integration | Google Maps | Supabase | Ai Integration | Low-Code App Development | No-Code app Development | Mobile App Redesign | Mobile App Bug Fixing | Web App Development | Web Design | Frontend Development | Backend Development | Supabase | Revenucat | Desktop App development | MacOS App Development 🎯 𝗠𝘆 𝗔𝗽𝗽𝗿𝗼𝗮𝗰𝗵 ✔ Clear communication ✔ Clean, scalable code ✔ On-time delivery ✔ Long-term collaboration 📩 𝗟𝗲𝘁’𝘀 𝗕𝘂𝗶𝗹𝗱 𝗦𝗼𝗺𝗲𝘁𝗵𝗶𝗻𝗴 𝗚𝗿𝗲𝗮𝘁 If you have an idea, need to scale your app, or want expert guidance — **Send me a message or invite me to your job.** I’d be happy to help turn your vision into a successful product 🚀

*** My experience *** I have implemented multiple C# / .NET / ASP.NET [Core] [MVC] / RESTful / JS/TS / SQL Full-Stack solutions and it will be my pleasure to do so again for you and make your project successful. I have worked for 7 years for a company specializing in that stack before moving to online freelancing iin 2022, hence my expertise. For JS/TS, I have implemented solutions with both React and Angular. *** About me *** I'm a Canadian expat living in Vietnam. I worked for 7 years as a software developer for a Canadian company before moving to online freelancing in late 2022. I learned programming in 2003 when I was 13 and made simple apps on and off for a few years before getting hooked for good around 2013. I've since programmed almost every siingle day, occasionally on hobby projects as well as for work since 2015. *** What to expect *** As your freelancer, my priority is making your project a success. I care about it personally, and I mean it. As a programmer, my priority is quality (of code and UX). I design for long-term maintainability, performance, and scalability. I love what I do, and I care to do it well.

Full-Stack Developer with 11+ years of experience building scalable SaaS platforms, enterprise applications, cloud-based systems, APIs, and modern web applications. I help startups, SaaS companies, and enterprise businesses develop secure, high-performance, and scalable applications using .NET Core, React, Angular, Node.js, Azure, and AWS. 🥇 100% Job Success Score 🕐 9,200+ Upwork Hours ✅ 50+ Successfully Delivered Projects ✅ Long-Term Client Relationships ✅ Enterprise-Level Development Experience I specialize in designing and developing complete end-to-end solutions that are scalable, maintainable, and production-ready. 🏆 Expertise ✔ Full-Stack Web Applications ✔ SaaS Platforms ✔ Enterprise Systems ✔ REST APIs & Microservices ✔ Cloud Architecture & Deployment ✔ Dashboard & Admin Panel Development ✔ AI Integration & Automation ✔ Real-Time Applications ✔ External Service Integrations ✔ Performance Optimization Backend Technologies • C# • ASP.NET Core • .NET Core MVC • Web API • Node.js • Express.js • NestJS • Entity Framework • Microservices Architecture Frontend Technologies • React.js • Angular • Next.js • TypeScript • JavaScript • Redux • RxJS • HTML5 • CSS3 • Tailwind CSS • Bootstrap • Material UI • Ant Design • Angular Flex-Layout • Figma to HTML • Responsive Design • iOS, iPad & Material Design Compatibility • i18n Cloud & DevOps • Microsoft Azure • AWS • Azure DevOps • CI/CD Pipelines • Docker • Cloudflare • GitHub Actions Data Visualization & UI Components • AG Grid • Chart.js, D3.js • DevExpress • Telerik • Kendo UI • PrimeNG Database Technologies • MSSQL • PostgreSQL • MongoDB • MySQL • Redis AI & API Integrations • OpenAI API • Cursor AI • Claude AI • Gemini AI • Stripe • PayPal • Twilio • SendGrid • Google API • Payment Gateway Integrations Tools & Collaboration • JIRA, Trello, Asana, YouTrack • GitHub, Bitbucket Why Clients Work With Me • Clean and maintainable code • Strong communication and quick response • Business-focused development approach • Reliable delivery and deadline commitment • Long-term collaboration mindset • Startup and enterprise experience I focus on building high-quality applications that help businesses scale efficiently and improve user experience. Available for long-term contracts, SaaS development, enterprise systems, cloud applications, and AI-powered solutions. Let’s discuss your project and build something exceptional. Senior .NET Developer · Full Stack Developer · ASP.NET Core Developer · C# Developer · .NET Core Developer · .NET 8 · .NET 9 · ASP.NET Core Web API · REST API Developer · Microservices Developer · Azure Developer · Azure Cloud Engineer · Full Stack .NET Developer · Angular Developer · React Developer · React.js Developer · Angular 19 · React 19 · TypeScript Developer · C# · ASP.NET Core · Entity Framework Core · LINQ · SQL Server · PostgreSQL · Redis · RabbitMQ · Azure · Azure DevOps · Azure Functions · Docker · Kubernetes · GitHub Actions · CI/CD · Web API · RESTful Services · Microservices Architecture · Event-Driven Architecture · Distributed Systems · Clean Architecture · SOLID Principles · Design Patterns · Repository Pattern · Unit of Work · JWT Authentication · OAuth 2.0 · OpenID Connect · SignalR · gRPC · OpenTelemetry · Serilog · Elasticsearch · Angular · Angular Material · PrimeNG · RxJS · NgRx · TypeScript · JavaScript · HTML5 · CSS3 · SCSS · Bootstrap · Tailwind CSS · Responsive Design · React.js · Next.js · Redux Toolkit · TanStack Query · Context API · Hooks · Material UI · GraphQL · SPA Development · Unit Testing · xUnit · NUnit · Jest · React Testing Library · Agile Scrum · Secure Coding · Scalable Applications · Cloud-Native Applications

I build modern, high-performance Web and Cross-Platform applications using .NET (including .NET 8 & .NET 9), ASP.NET Core, React, and MAUI, delivering reliable APIs, scalable architectures, and clean, maintainable code. With 10+ years of experience, I help businesses develop full-stack solutions, automate processes, optimize databases, and integrate modern AI-powered workflows using tools like Windsurf, Cascade, Model Context Protocol (MCP), OpenAI API, and LLM-based automations. What I offer: ✅ Full-stack backend & API development using .NET (including .NET 8 / .NET 9 / ASP.NET Core / Web API) ✅ Front-end development with React (JavaScript / TypeScript), building SPAs and interactive UIs ✅ Cross-platform mobile/desktop applications with .NET MAUI for Android, iOS, Windows (or other supported platforms) ✅ Database design, optimisation and migrations (SQL Server / MySQL), including schema design and data conversion/handling ✅ End-to-end solutions — from UI to backend to database and integrations ✅ Clean, maintainable code; clear communication; on-time delivery; scalable architecture Whether you need a modern web app, a production-grade backend API, or a cross-platform app that runs everywhere, I’m ready to deliver a complete solution tailored to your requirements. Send me a message, share your project details, and I’ll propose a plan that best suits your needs and timeline. Core Skills / Keywords C# / .NET 8 / .NET 9 / ASP.NET Core / Web API React (JavaScript / TypeScript) .NET MAUI (cross-platform mobile & desktop apps) JavaScript / TypeScript / HTML / CSS / Bootstrap SQL Server / MySQL / Database Design & Optimization Entity Framework / ORM REST API / Backend Integrations Full-Stack Web Application Development Cross-Platform Mobile & Desktop App Development Frontend-Backend Integration Responsive UI / SPA Development Clean Code / Code Maintainability / Clean Architecture Version Control / Git

I help startups, SMEs, and enterprise businesses build secure, scalable, and high-performance software solutions that solve real business challenges. With over 6+ years of experience in Full Stack Development, I specialize in developing SaaS platforms, ERP systems, CRM solutions, custom web applications, enterprise APIs, and cloud-based software using modern Microsoft technologies. I believe great software is more than just clean code. It should improve business operations, automate repetitive tasks, enhance user experience, and support long-term growth. Whether you're building a new product, modernizing an existing application, or expanding your development team, I can help deliver reliable, production-ready solutions. Technical Expertise - ASP.NET Core, .NET Framework, .NET 6/7/8/9 - C#, ASP.NET MVC, Web API, REST API Development - Angular, React, Blazor, TypeScript, JavaScript - HTML5, CSS3, Bootstrap, Tailwind CSS - SQL Server, PostgreSQL, MongoDB - Entity Framework Core, Dapper - Azure App Services, Azure Functions, Azure SQL - AWS EC2, S3, RDS - Docker, Kubernetes, GitHub Actions, CI/CD Pipelines - SignalR, Hangfire, Background Services - OpenAI, ChatGPT, Gemini API Integration - Stripe, Razorpay, Google APIs - OAuth, JWT Authentication, Third-Party API Integration Business Solutions I've Delivered - Enterprise Resource Planning (ERP) Systems - Customer Relationship Management (CRM) Platforms - SaaS Products - Logistics & Fleet Management Systems - Manufacturing & Production Management Software - Accounting & Financial Management Solutions - Inventory & Warehouse Management Systems - Healthcare Applications - Customer Portals & Admin Dashboards - AI-Powered Business Applications Every project I work on is built with scalability, security, and maintainability in mind. I follow Clean Architecture, SOLID Principles, and industry best practices to ensure applications remain easy to maintain and ready for future growth. Why Clients Choose Me - Business-focused development approach - Clean, maintainable, and scalable code - Strong communication throughout the project - Fast response and reliable delivery - Experience with enterprise-grade applications - End-to-end development from planning to deployment - Long-term maintenance and technical support - Ability to work independently or with existing development teams I enjoy working closely with clients to understand their business goals before writing a single line of code. This allows me to recommend the right architecture, technology stack, and implementation strategy that aligns with both current requirements and future expansion. Whether you need a custom business application, a scalable SaaS platform, a secure REST API, cloud migration, AI integration, or ongoing support for an existing product, I am committed to delivering high-quality solutions that create real business value. If you're looking for a dependable .NET Full Stack Developer who takes ownership, communicates clearly, and delivers production-ready software on time, I'd be happy to discuss your project and become your long-term technology partner.

I'm a skilled developer with 10+ years of experience in the software industry, especially within Microsoft, cloud & mobile app solutions. Tell me your needs and I will do my best to help you. Having previously worked with large enterprises as well as many smaller start-ups, I have a broad range of experience and knowledge of the full software delivery lifecycle. Why should you hire me: ✅ I work fast and achieve your goals on time ✅ My total programming experience is 10+ years ✅ 200+ successful projects delivered ✅ Solid logic reasoning and problem-solving skills ✅ Responsiveness and high-quality delivery ✅ Best software development practices using ✅ Highly skilled Full Stack Developer and Mobile Developer team for enterprise solutions I am not interested in "one-hour" or "one-day" jobs. I establish long-lasting relationships with my clients. I always consider a commitment to the result as the first priority. Since 2015, I've been working as CEO at Lvivity - a boutique dev shop that I founded. My team will deliver you the best service, communication, and also reliable, and scalable code that will fulfill your business needs. Here is a list of technologies I have experience with: 🔸 Programming - .NET C# Architect, PM, BA, CEO @ Lvivity.com 🔸 Databases - MSSQL, MySQL, MongoDB, Oracle, Flat files (CSV, XML) 🔸 Source Control - TFS, GIT, SVN 🔸 API's - Google, eBay, Facebook, LinkedIn, Twitter, Amazon 🔸 And much more: ASP.NET MVC / Core2 / WPF / Xamarin / SWIFT, React.Native, Flutter, Azure, AWS So, I guarantee my enthusiasm for work and fulfilling my project with inexpressible efforts.

🥇 Top Rated Plus | Senior .NET & Azure Software Engineer 🏆 10+ years of experience with Microsoft Azure 🤓 1 x Microsoft Azure Certified | 3 x MongoDB Certification | 2 x PMI Certification I help tech teams ship high-quality cloud applications faster using .NET, Azure PaaS, microservices, and automated CI/CD pipelines. With 10+ years building mission-critical platforms for finance, healthcare, e-commerce and logistics, I deliver secure, scalable, and maintainable solutions that accelerate business impact. I specialize in crafting scalable, secure, and performance-optimized applications using .NET, Blazor, Azure, AWS, and modern frontend frameworks such as Angular and React. I’ve led architecture and development for Fortune 500 firms and startups alike, delivering robust solutions across logistics, finance, e-commerce, healthcare, and gaming. 🔍 𝐖𝐡𝐚𝐭 𝐈 𝐁𝐫𝐢𝐧𝐠: ✅ Scalable Microservices using the latest .NET version ✅ Blazor & Angular/React for interactive UIs ✅ CI/CD pipelines (GitHub Actions, Jenkins, Azure DevOps) ✅ Cloud-native deployments (Azure | AWS | Docker | Kubernetes) ✅ Real-time systems with Redis, WebSocket, Kafka ✅ Strong debugging, optimization, and code quality focus 📈 𝐑𝐞𝐜𝐞𝐧𝐭 𝐖𝐢𝐧𝐬: - Designed a healthcare practitioner search system scaling across AWS with real-time Elasticsearch - Led logistics platform revamp for a US-based company using .NET 10 + React - Built scalable e-commerce and casino gaming platforms from scratch 🤝 Let’s connect if you're looking for long-term value, high-quality code, and a dedicated partner.

Hello. I'm a software engineer with over 20 years of experience in various fields (Real Estate, eCommerce, Mortgage Industry, POS, etc.). I focus primarily in Microsoft technologies and different flavors of Javascript (jQuery, Vue.js, Angular, etc.). I am experienced in windows and web development with Microsoft technologies using C#, MVC, ASP .Net, .Net Core, Entity Framework, Web API, etc. I am a full stack developer who is just as comfortable on the backend as I am the front end. I am very well versed in source control management and Azure Devops as well. When working on a new project, I like to speak with my clients so that I can have a clear understanding of their needs and vision of the project. Thank you in advance for your time and consideration. I look forward to working with you soon.

Greetings! I have 6+ years of professional experiences in WEB and MOBILE APP development. I used to be a full stack developer, I provide professional service at a reasonable price. SKILLS: 1) Web Development * Asp.net Core, Asp.net MVC, Asp.net MVC web api, Hang Fire,signalr * WPF,WCF * Php,Cake Php, Laravel * AngularJS,ReactJS, Node.js * Web basis(Javascript, HTML5, Jquery UI, CSS3, Bootstrap) * API development and integration 2) Mobile App * React Native * Xamarin 3) Windows App *.NET framework / WPF / C#/VB 4) Database *MSSQL *My sql. *Mongo DB I look forward to working with you soon. Thanks for reading

I’m a senior .NET engineer with 10+ years of experience building scalable backend systems and modern web applications using ASP.NET Core and React. I design clean architectures, implement REST APIs, and build production-ready SaaS platforms. I also integrate AI capabilities, including OpenAI-based agents, RAG pipelines, and intelligent automation features into real-world products. On most projects, I take full ownership of backend development - from system design to production-ready delivery. In most projects, I am responsible for: • Design scalable backend architecture • Build secure ASP.NET Core Web APIs • Implement business logic and domain-driven structures • Integrate AI capabilities (OpenAI API, RAG, vector search, AI agents) • Optimize SQL Server performance • Structure systems using Clean Architecture and SOLID principles • Modernize and refactor legacy .NET applications 🔹 What You Get Working With Me • Clear technical planning before development begins • Clean, maintainable C# code • Scalable REST APIs designed for growth • Well-structured backend architecture • Reliable AI integration when needed • Transparent communication and predictable delivery I build backend systems that remain stable, extensible, and ready for future evolution - including AI-powered features. 🔹 Core Expertise Backend & Architecture: • C# • .NET Core / .NET 6 / .NET 7 / .NET 8 • ASP.NET Core, ASP.NET Boilerplate, ASP.NET Zero, ABP IO • REST API / Web API development • Entity Framework Core • SQL Server • Microservices architecture • Clean Architecture (SOLID, DDD) • Performance optimization • Legacy system modernization AI & Intelligent Systems: • OpenAI API & AI agents • RAG pipelines & vector databases • Semantic Kernel & tool orchestration • Embedding AI features into production SaaS platforms Frontend (When Required): • React • Angular • Blazor • JavaScript / TypeScript (My primary strength is backend and system architecture.) Additional Experience: • SaaS platform development • Third-party API integrations (Stripe, Google, Amazon, etc.) • Data modeling and database optimization • Unit testing (NUnit, xUnit) • Refactoring and architecture improvements 🔹 Best Fit Projects • Building scalable backend systems from scratch • Developing ASP.NET Core Web APIs • AI integration into existing products • SaaS platform architecture • Migrating legacy applications to .NET Core • Long-term product development partnerships If you're building a serious product and need a Senior .NET developer who can design robust backend architecture and integrate modern AI capabilities - I’d be glad to help.