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A C#/.NET developer with over 4 years of hands-on experience in building robust and maintainable applications, spanning desktop, cross-platform mobile, and web environments. My specialization lies in transforming complex technical challenges into clean, efficient, and well-architected solutions. What I Bring to Your Project Deep expertise in C#, .NET Core, .NET MAUI / Xamarin.Forms, WPF, enabling both desktop and cross-platform mobile apps. Experience working with networking, real-time communication, VoIP (SIP, IAX, XMPP, custom sockets / SignalR) — useful for projects involving custom protocols, chat/voice features, or real-time data exchange. Strong focus on clean code, modular architecture, and long-term maintainability: I build codebases that stay organized and scalable rather than accumulating technical debt. Why I’m a Good Fit for You I’m adaptable — whether you need a desktop tool, a cross-platform mobile app, a web service, or integrations involving real-time communication, I’ve got you covered. I value collaboration and clarity: I translate requirements into structured, understandable deliverables, and keep communication transparent throughout. I thrive on challenges: complex problems don’t scare me — I enjoy dissecting them, and delivering simple, effective solutions that align with your goals. If you’re looking for a reliable developer who can handle the heavy lifting and deliver clean, maintainable code — let’s connect and build something great together.

✨Imagine a digital product that not only works flawlessly but wows your users from the very first tap. Ready to bring your vision to life? Let’s build something extraordinary✨ 👑 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝐅𝐫𝐞𝐞𝐥𝐚𝐧𝐜𝐞𝐫 | Flutter Software Engineer • AI Mobile app - Android & Ios Flutter Applications • Cross Platform Application Developer • FlutterFlow • AI Apps • Web Developer •WordPres • Nuxt.js • Vue.js • React • DraftBit | Mobile • Web • UI/UX • Flutter for iOS, Android, Windows, macOS I am a Full-Stack Mobile App Developer with 5+ years of experience specializing in custom iOS and Android application development. By combining advanced cross-platform frameworks like Flutter and React Native with robust backend architectures and cutting-edge AI integrations, I deliver secure, scalable digital products engineered for long-term growth as a mobile application developer. 🛠️ Tech Stack & Core Capabilities Mobile Frameworks: Flutter, React Native, KMM (Kotlin Multiplatform), Native Android (Java/Kotlin), iOS (Swift) AI Integration: Custom AI Mobile App Development, OpenAI API, Chatbots, Personalized Avatars, Machine Learning APIs Backend & Cloud: Node.js, Express.js, Next.js, Firebase, AWS (S3), Microsoft Azure, Docker Databases: MongoDB, MySQL, PostgreSQL, GraphQL UI/UX Design: High-fidelity prototyping in Figma, Wireframing, Dashboard Design, Responsive Web & App Layouts 📈 Industry Experience & Specialized App Niches I design and deploy end-to-end applications across a wide array of fast-growing industries, integrating essential features like advanced analytics (OneSignal, RevenueCat) and payment gateways (RazorPay, Stripe, Play Store Billing): On-Demand Services: Food Delivery, Ride Instructor Booking, Home Service Apps E-Commerce & Retail: Marketplace Platforms (Buyer/Seller), Inventory Management, Grocery Apps EdTech: Learning Management Systems (LMS), Educational & Quiz Applications 🤝 Why Work With Me? End-to-End Execution: From a Figma UI/UX design wireframe to full-stack backend development and App Store/Google Play publishing, I handle the entire lifecycle. Clean Architecture: I strictly follow MVVM/MVC patterns and SOLID principles, ensuring your app's codebase is clean, bug-free, and easy to maintain. Post-Launch Support: Every project includes 6 months of complimentary maintenance support to keep your app running flawlessly as a mobile application developer or AI mobile app developer. --------------------------------------------- I've majored in software engineering and have used a wide range of technologies to help businesses build mobile apps that have generated millions in revenue, including AI mobile app. Over the past 5+ years, I have developed a range of iOS and Android mobile apps using AI-driven mobile app development with AI mobile app. Food delivery App, On-demand AI Mobile App, Ride Instructor Booking App, Real Estate Listing App, Social Media Mobile App, Task Management App (like To-Do), Investors Management App, Sports Mobile App, E-commerce Mobile App, Event Management Mobile App, Grocery Mobile App, Freelance Marketplace App, Home Service Booking App, Inventory Management App, Learning Management Mobile App, Appointment Booking App, Venue Booking Mobile App, ai mobile app development, mobile application developer, ai mobile app and many more. 𝐓𝐄𝐂𝐇 𝐒𝐓𝐀𝐂𝐊 𝐌𝐎𝐁𝐈𝐋𝐄: ✅ Dart | Java | Kotlin, Swift ✅ Flutter, React Native, KMM, Native Android ✅ REST API, Firebase ✅ Unit testing- JUnit, Mockito ✅ Agile, SCRUM, Jira, ClickUp, Trello ✅ MVVM, MVC, SOLID Principle, Clean architecture 𝐓𝐄𝐂𝐇 𝐒𝐓𝐀𝐂𝐊 𝐅𝐑𝐎𝐍𝐓𝐄𝐍𝐃: ✅ JavaScript | Typescript ✅ ReactJs | Next.Js ✅ HTML5 | CSS3 | Bootstrap | Ant Design | MUI ✅ Tailwind CSS | Sass | Chakra UI ✅ Content Management System (CMS) ✅ WordPress | WooCommerce 𝐓𝐄𝐂𝐇 𝐒𝐓𝐀𝐂𝐊 𝐁𝐀𝐂𝐊𝐄𝐍𝐃: ✅ NodeJS | NextJS | Express JS 𝐓𝐄𝐂𝐇 𝐒𝐓𝐀𝐂𝐊 𝐃𝐀𝐓𝐀𝐁𝐀𝐒𝐄: ✅ MongoDB | MySQL | PostgreSQL | GraphQL 𝐓𝐄𝐂𝐇 𝐒𝐓𝐀𝐂𝐊 𝐂𝐋𝐎𝐔𝐃: ✅ AWS | (S3) ✅ Microsoft Azure | Azure DevOps | Docker ✅ Git | Git Hub | Git Lab ⭐ 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: ✦ Responsive Web Design ✦ Front-End and Back-End Development ✦ Advanced API Integration ✦ Performance and Security Optimization ✦ UI/UX Design with a focus on user engagement ✦ Progressive Web Apps (PWAs) In addition to the above, I have hands-on app publishing experience on the Play Store and Apple Store also in AI mobile app. 𝐖𝐡𝐲 𝐜𝐡𝐨𝐨𝐬𝐞 𝐦𝐞? ✅ Get your projects designed and developed promptly. ✅ Detailed and efficient prototyping ensures your project meets your expectations. ✅ Delivering industry-standard practices in ingestion, integration, development and testing. It's important to me to build long-term relationships with clients. I am flexible with my working hours and I am happy to work on an AI mobile app. P.S. - When you work with me your satisfaction is 100% guaranteed. - Every person who ever worked with me got results.

⚡ 15+ years of software development experience building production-ready mobile apps, AI products, SaaS platforms, and backend systems for startups and enterprises. 🛠️ Specializing in Mobile App Development | Flutter | Native iOS (Swift) | AI Applications | Full Stack Development | Firebase | Supabase | GCP 🚀 Built and shipped products from idea to production, including AI-powered apps, YC-backed startups, healthcare platforms, eCommerce systems, and developer tools. I've helped companies launch products, scale engineering teams, modernize architectures, and ship features used by thousands of users. Some recent work includes: • Cartpanda – Built and maintained the production mobile app for a YC-backed eCommerce platform. • Smileneo (makeO) – Led development across mobile apps, admin dashboard, backend services, and microservices. • BeatReels – AI-powered reel creation platform. • RemoteMacOS – Native Swift app for controlling macOS remotely. • UglyPDF – AI-powered PDF beautifier using LLMs, OCR, and computer vision. • Expense AI – AI expense tracker with voice, OCR, chat, and analytics. ⭐️ Client Testimonials: "Excellent communication and outstanding technical skills." "Amon consistently delivers production-quality software." "One of the strongest Flutter developers we've worked with." Upwork Stats: 🏅 Top 1% of Mobile Developers 🏅 Top 1% of iOS Developers 🏅 Top 5% of Firebase Developers 🏅 Top 5% of Swift Developers 🎓 Claude Certified Architect | 15+ Years of Professional Software Development I specialize in building high-quality mobile applications, AI-powered products, SaaS platforms, and scalable backend systems. My experience spans healthcare, fintech, eCommerce, marketplaces, social apps, productivity software, subscription businesses, and enterprise platforms. From MVP to App Store launch, I handle architecture, UI/UX implementation, backend APIs, cloud infrastructure, AI integrations, CI/CD, analytics, subscriptions, payment gateways, and long-term product scaling. 🌟 Why Choose Me • Product-first mindset not just coding, but helping build better products. • Fast, clear communication throughout every project. • Clean, scalable architecture following industry best practices. • Production experience with Flutter, Swift, Firebase, Supabase, GCP, Docker, Kubernetes, FastAPI, Node.js, Next.js, PostgreSQL, OpenAI, Claude, Gemini, MCP, AI Agents, OCR, Voice AI, and automation. • Independent developer you work directly with me from planning to deployment. 😁 Whether you're launching an MVP, modernizing an existing application, or building an AI-first product, I'd be happy to help bring your idea to production. Specialities: Full Stack Development, AI Systems Architect, AI SaaS Developer, SaaS MVP Development, Mobile MVP Development, Cross-Platform Mobile Apps, Mobile App Development, iOS Development, Scalable SaaS Architecture, AI-Powered SaaS, Flutter App Development, React Native App Development, Backend Development, Frontend Development, Mobile App Architecture, Cross Platform App Development, AI Powered Applications, API Integration, API-Driven Mobile Apps, Cloud Architecture, Production-Ready MVP, Secure APIs, OpenAI Integration, AI Workflow Automation, LLM Integration

I’m S M Nazmul Hasan, CEO of Kolpolok Limited, trusted by cybersecurity companies, SaaS providers, and VPN startups in 65+ countries. Over the past decade, I’ve delivered VPN solutions that power millions of daily connections. I build scalable, reliable VPN platforms that drive real business growth. 💡𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀 𝗜 𝗗𝗲𝗹𝗶𝘃𝗲𝗿 𝗳𝗼𝗿 𝗬𝗼𝘂 ➡️ End-to-End VPN App Development: ✔ Multi-platform VPN apps for iOS, Android, Windows, macOS, Fire TV, and browsers ✔ Fully white label vpn solutions with 𝗰𝗼𝗺𝗽𝗹𝗲𝘁𝗲 𝘀𝗼𝘂𝗿𝗰𝗲-𝗰𝗼𝗱𝗲 𝗼𝘄𝗻𝗲𝗿𝘀𝗵𝗶𝗽 ✔ Seamless in-app purchases, user authentication, and multi-language support ✔ Intuitive UI/UX design focused on conversion and retention ➡️ White-Label VPN SDK Integration: ✔ WL VPN SDK integration with scalable custom backend solutions ✔ Integration with PureVPN White Label SDK and other leading providers ✔ Ready-to-launch SDKs customized to your brand and user requirements ✔ Full technical support for integration, testing, and deployment ➡️ Multi-Protocol Backend Infrastructure: ✔ Support for OpenVPN, WireGuard, IKEv2, Shadowsocks, VMess, VLESS, IPsec, OpenConnect, Singbox compatible infrastructure ✔ Scalable VPN admin panel dashboards with user management, and analytics. ✔ Real-world traffic optimization, load balancing, and redundancy configurations ✔ Compliance-ready architecture aligned with GDPR, SOC2, and ISO standards 💡𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲 I don’t just build apps, I build VPN ecosystems tailored to your business model. ✔ Total Code Ownership – You own the complete source code from day one ✔ Business-First UX – Apps designed for real users, not just developer functionality ✔ Security & Compliance – ISO-certified workflows, and robust encryption standards ✔ Scalable Architecture – Built to grow with your user base, handling thousands of concurrent connections ✔ Rule-Based Routing & Split Tunneling – Optimized configurations for China and restricted regions ✔ Complete Documentation – Clean code documentation ✔ Manual Training & Technical Support – Hands-on guidance for your internal team ✔ Fast Delivery – Fast responses, and transparent progress updates ✔ 𝗧𝗼𝗽-𝗥𝗮𝘁𝗲𝗱 𝗣𝗹𝘂𝘀 𝗨𝗽𝘄𝗼𝗿𝗸 𝗖𝗼𝗻𝘁𝗿𝗮𝗰𝘁𝗼𝗿 ✔ 𝟭𝟬𝟬%+ 𝗝𝗼𝗯 𝗦𝘂𝗰𝗰𝗲𝘀𝘀 𝗥𝗮𝘁𝗶𝗻𝗴 ✔ 𝟵𝟬% 𝗔𝗯𝗼𝘃𝗲 𝗥𝗲-𝗵𝗶𝗿𝗲 𝗥𝗮𝘁𝗲 📝𝗣𝗿𝗼𝘃𝗲𝗻 𝗧𝗿𝗮𝗰𝗸 𝗥𝗲𝗰𝗼𝗿𝗱 Delivered 150+ projects in 65+ countries across 5 continents ✔ Developed VPN apps with millions of downloads and 4.9+ star average ratings across Google Play, App Store, and Trustpilot ✔ Supported long-term client growth with performance-focused infrastructure enhancements 👤𝗪𝗵𝗼 𝗜 𝗦𝘂𝗽𝗽𝗼𝗿𝘁 & 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 ✔ Startups, SaaS, and tech firms launching their first VPN product to enter this booming market ✔ Entrepreneurs and VPN resellers seeking high-performance white-label apps with fast deployment ✔ Agencies and consultancies adding VPN to their service portfolio for recurring revenue streams 💡𝗥𝗲𝗰𝗲𝗻𝘁 𝗙𝗼𝗰𝘂𝘀 𝗔𝗿𝗲𝗮𝘀 ✔ Open Connect, WireGuard, OpenVPN, Sing Box optimization for faster connections and lower battery usage ✔ Advanced obfuscation techniques to bypass censorship firewalls ✔ Payment gateway integrations for subscription-based VPN monetization ✔ VPN reseller admin panels with automated user and license management ✔ Multi-protocol hybrid backend design for global coverage and redundancy 𝗟𝗲𝘁’𝘀 𝗕𝘂𝗶𝗹𝗱 𝗬𝗼𝘂𝗿 𝗩𝗣𝗡 𝗕𝘂𝘀𝗶𝗻𝗲𝘀𝘀 You’re not just hiring a VPN developer. You’re partnering with an expert who understands the technical, business, and security dimensions of building VPN products that scale. If you’re ready to deploy a secure, scalable, and revenue-generating VPN solution under your brand, send me a message. I’ll respond within 24 hours with a tailored roadmap to bring your VPN vision to life. 𝑰𝒏 𝒂𝒅𝒅𝒊𝒕𝒊𝒐𝒏 𝒕𝒐 𝒇𝒖𝒍𝒍-𝒔𝒕𝒂𝒄𝒌 𝑽𝑷𝑵 𝒔𝒐𝒍𝒖𝒕𝒊𝒐𝒏𝒔, 𝑰 𝒉𝒆𝒍𝒑 𝒇𝒐𝒖𝒏𝒅𝒆𝒓𝒔 𝒂𝒏𝒅 𝒑𝒓𝒐𝒅𝒖𝒄𝒕 𝒕𝒆𝒂𝒎𝒔 𝒃𝒓𝒊𝒏𝒈 𝒆𝒂𝒓𝒍𝒚-𝒔𝒕𝒂𝒈𝒆 𝒊𝒅𝒆𝒂𝒔 𝒕𝒐 𝒍𝒊𝒇𝒆 𝒘𝒊𝒕𝒉 𝒊𝒏𝒕𝒖𝒊𝒕𝒊𝒗𝒆 𝒅𝒆𝒔𝒊𝒈𝒏 𝒂𝒏𝒅 𝒍𝒆𝒂𝒏 𝒅𝒆𝒗𝒆𝒍𝒐𝒑𝒎𝒆𝒏𝒕 𝒔𝒕𝒓𝒂𝒕𝒆𝒈𝒊𝒆𝒔. ✔ MVP Development for Fast Launch Agile MVP's tailored to validate your core concept, reduce time-to-market, and attract user traction—without unnecessary features or costs. ✔ UI/UX Design that Converts Crafting modern, user-focused interfaces for mobile and web apps—built to engage, retain, and grow your audience from day one. ✔ Fleet & VTS Tracking – Real-time GPS tracking and fleet optimization systems ✔ IoT Solutions – Smart, connected platforms with real-time automation ✔ AI Integration – Predictive, data-driven features to power growth Whether you're testing a new product or refining an existing one, I ensure your app is not just functional—but user-loved and market-ready. Let’s connect to launch your brand and lead the market today!

Hi there, I'm a Software Engineer. I am working on Windows and Web Development. I can help you to build your application. I value my time, and I know you do the same way. So let's do business now! Cheapest and Reliable provider!!! Support is available 24/7. My services are: ● C#, C ● .Net Windows & Web Development. ● .Net MVC, .Net Web Form, ADO.Net, VB .Net. ● .Net Web API, RESTful API ● .Net Core, .Net MAUI. ● Layer Architecture. ● Crystal Report, SSRS (RDLC Report) ● ERP HR Module, Banking Remittance Solution. ● Umbraco CMS. ● IIS Hosting Server. ● Azure web hosting, Azure DevOps, Docker. ● JavaScript, jQuery. ● Kendo UI-(Telerik). ● HTML, CSS. ● Angular 10 (Basic), Blazor (Basic). ● PSD to HTML ● MS SQL, PostgreSQL. ● SignalR. ● Unit Testing (SonarQube) ● GitHub, GitLab ● Agile (Jira, Trello). You will get: Quality Work 100% satisfaction Full-time support 100% accuracy Always available for customer orders. ORDER NOW TO GET YOUR JOB DONE WITH 100% ACCURACY! ❉❉❉ Thank You ❉❉❉

Hi, I am Eanur, I have 10 years experience in software development. I have good skill in JAVA, PHP, Oracle Database, PL/SQL, MYSQL, HTML, CSS3, Java scripts, J Query, Ajax, Moot Tools and XML. I have developed different websites with framework like Spring MVC, Spring Boot, JPA, Hibernate, Struts, MyBatis. I have a good portfolio of PHP based framework like WordPress, Joomla, Magento, Prestashop, Virtumart, Woocommerce and Opencart. I have good knowledge of REST API and Soap API integration. From the last years I get the opportunity to work on asterisk based job. I have experience in developing Elastix theme based on asterisk server. I have been developing different parts of asterisk and PABX server. I can develop and modify vTiger and Suger CRM for clients management. Besides Windows, I like very much play with Linux OS for server customization. ******************** Area of Experience ******************** 1. Website Development with core PHP & PHP based framework like ike wordpress, Joomla, Magento, Prestashop, Virtumart, Woocommerce and Opencart. 2. Website development of internet banking, agent banking & other in-house web portal for bank. 3. Java Spring Maven, MyBatis & Oracle Database projects for bank. 4. Soap API integration with Temenos T24 for core banking integration using Java, Spring MVC &Maven