I am an educated (university level with Microsoft and Symantec certificates) and experienced software and web developer (Visual C#, ASP.NET(Core), SQL Server, Kendo UI, JavaScript, OpenAI, React, Angular, NodeJS ) located in Serbia. I have extensive experience building Windows, web applications, database solutions, and scrapers. I can work as a standalone developer or as part of a team.

🚀 Startup & SaaS Web Developer | Full-Stack | Shopify, CMS & Business-Focused I work with startups, SaaS founders, and growing businesses to turn ideas into scalable, high-performing web products. Whether you need an MVP, a SaaS platform, a Shopify e-commerce store, or a conversion-focused website, my goal is to build solutions that are not only technically solid but also support real business growth. Over time, I’ve noticed that many founders end up with developers who focus only on the code. While clean code is important, a successful product also needs good performance, thoughtful user experience, and a clear business purpose. That’s the approach I bring to every project. 💡 What I can help you build • SaaS platforms and startup MVPs • Modern startup landing pages designed to convert • Full-stack web applications • Shopify stores and e-commerce optimization • CMS-powered websites for growing businesses • API integrations and custom backend functionality ⚙️ Technologies & Platforms Frontend: JavaScript, React, Next.js Backend: Node.js, REST APIs CMS & Platforms: WordPress, Shopify, Webflow Other: Performance optimization, SEO-friendly development, scalable architecture 🎯 Why clients choose to work with me ✔ Clean and scalable full-stack development ✔ Clear, responsive communication throughout the project ✔ Focus on performance, usability, and conversions ✔ A reliable partner who understands startup and business needs If you’re building a startup product, SaaS platform, Shopify store, or a modern business website, I’d be glad to help bring your idea to life. Let’s build something great together. 🚀 #FullStackDevelopment #SaaSDevelopment #StartupMVP #WebApplicationDevelopment #React #NodeJS #JavaScript #APIDevelopment #WordPressDevelopment #ShopifyDevelopment #WebflowDevelopment #EcommerceDevelopment #LandingPageDevelopment #PerformanceOptimization #SEOFriendlyDevelopment

I help startups and growing businesses build reliable 𝐒𝐚𝐚𝐬 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐬, 𝐏𝐚𝐲𝐦𝐞𝐧𝐭 𝐬𝐲𝐬𝐭𝐞𝐦𝐬, and 𝐀𝐈-𝐩𝐨𝐰𝐞𝐫𝐞𝐝 𝐰𝐨𝐫𝐤𝐟𝐥𝐨𝐰𝐬 that are production-ready. 𝐈’𝐦 𝐚 𝐒𝐞𝐧𝐢𝐨𝐫 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫(𝒲ℯ𝒷&ℳℴ𝒷𝒾𝓁ℯ) 𝐚𝐧𝐝 𝐒𝐭𝐫𝐢𝐩𝐞/𝐏𝐚𝐲𝐦𝐞𝐧𝐭𝐬 𝐒𝐩𝐞𝐜𝐢𝐚𝐥𝐢𝐬𝐭 𝐰𝐢𝐭𝐡 $𝟏𝟓𝟎𝐤+ 𝐞𝐚𝐫𝐧𝐞𝐝 𝐨𝐧 𝐔𝐩𝐰𝐨𝐫𝐤 𝐚𝐧𝐝 𝟏𝟓𝟎+ 𝐬𝐮𝐜𝐜𝐞𝐬𝐬𝐟𝐮𝐥𝐥𝐲 𝐝𝐞𝐥𝐢𝐯𝐞𝐫𝐞𝐝 𝐩𝐫𝐨𝐣𝐞𝐜𝐭𝐬, 𝐢𝐧𝐜𝐥𝐮𝐝𝐢𝐧𝐠 𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬 𝐩𝐫𝐨𝐜𝐞𝐬𝐬𝐢𝐧𝐠 𝐦𝐢𝐥𝐥𝐢𝐨𝐧𝐬 𝐢𝐧 𝐚𝐧𝐧𝐮𝐚𝐥 𝐫𝐞𝐯𝐞𝐧𝐮𝐞. ❇️ I focus on outcomes that matter: 🔹Higher checkout conversion 🔹Fewer payment failures 🔹Faster product launches 🔹Secure, scalable architecture ❇️Why clients hire me: 🔹Clean, reliable implementation 🔹Clear communication and on-time delivery 🔹Strong ownership from planning to production 𝐑𝐞𝐜𝐞𝐧𝐭 𝐜𝐥𝐢𝐞𝐧𝐭 𝐟𝐞𝐞𝐝𝐛𝐚𝐜𝐤 (𝟓 star): “Saidur is an excellent developer who goes above and beyond to get the job done. I recommend Saidur for any work you need done. 5 Stars from Me.” “I’m bringing Saidur back for the Google Cloud setup because his work quality is consistently high... clean, secure implementations... confident in the outcome.” ❇️ Core expertise: 🔹Full-stack web and mobile development 🔹SaaS platforms (multi-tenant, RBAC, subscriptions, billing) 🔹Stripe integrations (Checkout, Subscriptions, Connect, Webhooks, Invoicing, Tax, Payouts, SCA/3DS, ACH, SEPA, Apple Pay, Google Pay) 🔹Payment migrations (between Stripe accounts or from other gateways) 🔹AI features (OpenAI/ChatGPT, RAG, function calling, agentic workflows, AI automation) 🔹API development and integrations (REST, webhook-driven systems) 🔹MVP development (rapid build to production-ready architecture) ❇️ AI/LLM capabilities: 🔹Prompt design and tool/function workflows 🔹RAG pipelines (embeddings, vector search, reranking) 🔹AI + rule-engine hybrid systems 🔹Deployment patterns (queues, workers, caching, monitoring) ❇️ Tech stack: 𝐁𝐚𝐜𝐤𝐞𝐧𝐝: Node.js, Python, Next.js, NestJS, Laravel, CodeIgniter, CakePHP, WordPress, Java, MySQL, MongoDB, Supabase 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝: React, Next.js, React Native, Vue, TypeScript, Tailwind CSS 𝐃𝐞𝐯𝐎𝐩𝐬/𝐂𝐥𝐨𝐮𝐝: Docker, Kubernetes, Nginx, AWS, GCP (Cloud Run, Cloud SQL), Terraform, Ansible, Jenkins, Grafana, CI/CD automation, infrastructure as code (IaC), load balancing, CDN, monitoring, logging, and observability. 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬: Stripe, PayPal, WorldPay, Plaid, Mollie, Scalapay, Zapier, Pabbly, QuickBooks, FreshBooks, Pipedrive, Mailchimp, Facebook Pixel, Google Analytics, and many more. If you need a developer who can build, fix, and scale your product with quality and speed, send me a message with your goals and timeline. I can start with a quick technical assessment and clear implementation plan. Thanks, Saidur Rohman

"Top-Rated Flutter Developer | 6+ Years of Experience in Full-Stack Mobile App Development" 𝘼𝙧𝙚 𝙮𝙤𝙪 𝙡𝙤𝙤𝙠𝙞𝙣𝙜 𝙛𝙤𝙧 𝙖𝙣 𝙚𝙭𝙥𝙚𝙧𝙩 𝙙𝙚𝙫𝙚𝙡𝙤𝙥𝙚𝙧 𝙛𝙤𝙧 𝙮𝙤𝙪𝙧 𝙢𝙤𝙗𝙞𝙡𝙚 𝙖𝙥𝙥 𝙥𝙧𝙤𝙟𝙚𝙘𝙩? 𝙇𝙚𝙩𝙨 𝙬𝙤𝙧𝙠 𝙩𝙤𝙜𝙚𝙩𝙝𝙚𝙧 𝙩𝙤 𝙗𝙪𝙞𝙡𝙙 𝙩𝙝𝙚 𝙣𝙚𝙭𝙩 𝙗𝙞𝙜 𝙩𝙝𝙞𝙣𝙜! ⭐️ Come to me with just an idea or a full design. I'll quote and we'll chat about how I can bring this idea to reality. Hi, I'm Shreya and Welcome to my profile. :) 🎯 6+ Years of Experience in Flutter ✅ 100% Job Success Rate I am proud to be an Upwork Top Rated Freelancer, recognized for my outstanding performance and consistent success across both short- and long-term projects. ✅ Expertise in ♦ Flutter ♦ Android ♦ CSS ♦ JavaScript ♦ Node.js ♦ Payment integration: Stripe, Paypal, Apple Pay, Google Pay, Razorpay, Urway ♦ Firebase: Authentication, Cloud Functions, Messaging, Analytics, Dynamic Link, Storage, Remote Config ♦ Backend: Firebase, MongoDB, Node.js ♦ UI/UX Design: Figma, XD ♦ Social media features: Video/photo Feeds, Stories, Like, Comment section ♦ In app advertisement: Google Admob, Facebook. Applovin, Ironsource ♦ Converting design ideas into responsive, engaging & unique UI with animations Sectors I have Served: I have built applications for diverse industries, including: 📱 AI development app, Health and fitness app, IOT app, Food delivery app, On-demand App, Home services app, Handy man app, Salon app, Beauty app, Taxi app, Ride app, E-commerce app, Dating app, Travel app, Music streaming app, Video streaming app, Fintech app, Shopping app, Telemedicine app, Finance App, Real estate app, Social media app, Chat app, Business app, Messaging app, Online courses app, Online education learning app, Tutor app, Hotel booking app, Online grocery order app ✅ I will provide ♦ High-quality, bug-free apps that can scale to meet the demands of your users. ♦ Maintainable, clean, and scalable code. ♦ Pixel-perfect UI. ♦ Lifetime app maintenance and constant improvements. Are you ready to take your ideas and brands to the next level? I'll build more than your expectations, so come on and let's get connected! Let’s collaborate to bring your vision to life! Regards, Shreya Ambaliya. ✅ 𝐊𝐞𝐲𝐰𝐨𝐫𝐝𝐬: Flutter Developer | Flutter App Development | Cross-Platform Apps | Mobile App Development | iOS & Android Apps | BLoC / Riverpod / GetX | Firebase Integration | REST & GraphQL APIs | Payment Gateways | Push Notifications | Geolocation & Maps | Chat & Video Integration | E-Commerce Apps | FinTech Apps | Healthcare Apps | EdTech Apps | Social Media Apps | Startup MVPs | End-to-End App Development | UI/UX Design in Flutter | Scalable Mobile Solutions

🖥️ C# / .NET Developer | 📦 200+ Projects | 💯 Job Success | 🏆 Top Rated Software developer building C# / .NET applications since 2010. Specialized in Windows desktop using WPF & WinForms, with cross-platform expertise in Avalonia. Experienced in Blazor frontend, ASP.NET Core backend & Azure deployments. Developing solutions for business automation, document generation, reporting, data-intensive desktop tools, API integrations, real-time dashboards, Windows service development, and legacy .NET Framework modernization. Delivered 200+ software solutions for global clients across multiple industries, from focused utilities to large-scale, long-term systems, working both independently and within distributed teams. Technical Skills ---------------- Desktop - WPF, XAML, WinForms, WinUI, Avalonia, Uno Platform, WebView2 - MVVM, Prism, ReactiveUI, Custom Controls, Templating, Styling - WinAPI, PInvoke, Native Interop, Windows Shell Integration - Hardware Integration, Third-party SDKs, Enterprise Integration - Reporting, Printing, PDF/Excel Generation, Document Processing Databases - Schema Design, SQL Server, SQLite, EF Core, Dapper, LINQ Backend & Web - REST APIs, ASP.NET Core, Minimal APIs, Swagger, Logging - Blazor, Razor Pages, MudBlazor, HTMX, HTML, CSS, JavaScript Build & Deployment - Git, MSBuild, Visual Studio, NuGet, PowerShell, Azure, Docker - Application Packaging, Installer Creation, Code Signing

Hi, I’m Adnan Jamil – a senior full-stack JavaScript developer with over 15 years of experience in building high-performing, scalable, and modern web and mobile applications. I specialize in JavaScript-based stacks like MERN, PERN, and Next.js, and I’ve worked with companies of all sizes — from early-stage startups to enterprise-level platforms. 💻 𝗧𝗲𝗰𝗵 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲: -- Frontend: React.js, Next.js, JavaScript (ES6+), TypeScript -- Backend: Node.js, Express.js, Nest.js -- Stacks: MERN (MongoDB, Express, React, Node), PERN (PostgreSQL, Express, React, Node) -- Databases: MongoDB, PostgreSQL, MySQL -- AI Integration: GPT, OpenAI APIs, Custom ML logic, NLP, Video & Speech Analytics -- APIs & Integration: REST APIs, GraphQL, 3rd Party APIs, Webhooks 𝗜 𝗳𝗼𝗰𝘂𝘀 𝗼𝗻 𝗯𝘂𝗶𝗹𝗱𝗶𝗻𝗴: -- 🧠 AI-powered applications (chatbots, analytics tools, smart automation) -- ⚙️ Custom web platforms (SaaS, Dashboards, ERPs, CRMs) -- 📱 Responsive frontends with React.js & Next.js -- 🔐 Secure, scalable backends with Node.js, Nest.js, and Express.js ✅ 𝗪𝗵𝘆 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲? -- 15+ years of real-world experience -- I write clean, maintainable, and testable code -- Strong understanding of both frontend UX and backend architecture -- Quick communication, consistent progress updates -- Ability to scale: I handle solo projects or bring in trusted support for larger builds 🔍 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗲𝘀 𝗜’𝘃𝗲 𝗗𝗲𝗹𝗶𝘃𝗲𝗿𝗲𝗱 𝗣𝗿𝗼𝗷𝗲𝗰𝘁𝘀 𝗜𝗻: -- HealthTech -- Travel & Tourism -- Retail & E-commerce -- Transportation & Logistics -- Hospitality -- FinTech -- Education -- Manufacturing -- Compliance & Regulatory Platforms 💬 𝗟𝗲𝘁'𝘀 𝗧𝗮𝗹𝗸 If you're looking for a pro-level full-stack developer who understands business logic, architecture, and future-proof tech — I'm here to help. 📅 Let’s schedule a quick discovery call to explore how I can bring your idea to life.

Looking for a website that looks world class and actually turns visitors into customers? That is exactly what I do. I am an official Framer Expert who designs and builds premium, high converting websites for startups and growing brands. Clean layouts, sharp typography, smooth micro interactions, and a real focus on conversion, not just decoration. Over 113 projects, 100,000 dollars earned, and 3,800+ hours on Upwork, with a long Top Rated history behind the work. How I can help you: 🎯 Framer Design & Development Beautiful, fast, fully responsive Framer websites built from scratch or from your concept. Landing pages, full marketing sites, and interactive components that feel premium and load instantly. 🛍️ Shopify Stores That Sell Clean, high converting Shopify stores. Store setup, theme customization, app and payment integrations, and a smooth buying experience across every device. 🧩 WordPress & WooCommerce Custom WordPress sites, WooCommerce stores, speed optimization, and responsive, SEO ready designs that are easy for you to manage. 🎨 UI/UX Design Thoughtful, user focused interfaces with strong visual hierarchy and clear calls to action, designed to guide visitors toward the action you care about. Need something more technical later, like custom development or AI automation? I have a full stack background too, so we can grow the project without switching freelancers. Why clients keep coming back: ✅ Premium, pixel perfect design with a focus on results ✅ Clear, friendly communication and honest timelines ✅ On time delivery and a calm, reliable process ✅ Native level English and easy collaboration across time zones If you want a site that genuinely reflects the quality of your business, I would love to help. Send me a quick message about your project and I will reply fast with a clear, honest plan.

Full Stack Web & Mobile Developer | 8+ Years | React, Node.js, Flutter, AWS I help businesses build fast, scalable web and mobile apps—custom ERP systems, CMS platforms, and cross-platform solutions. 8+ years delivering clean, reliable code for startups to enterprises. 💡 Industry-Focused Solutions I Provide Custom ERP Systems (ERPNext, Odoo, custom modules) Fleet management & tracking apps (GPS, live updates, notifications) Warehouse & inventory management systems Logistics workflow automation (orders, dispatch, delivery) Real-time dashboards for ops & KPIs Mobile apps for drivers, dispatchers, and warehouse staff Client portals for order tracking & communication 💻 Web Development Expertise Frontend: React.js, Next.js, Vue.js, Angular, HTML5, CSS3, Tailwind CSS, Bootstrap Backend: Node.js, Express.js, PHP, Laravel, Django, Ruby on Rails Database: MongoDB, MySQL, PostgreSQL, Firebase, SQLite API Integration: RESTful APIs, GraphQL, WebSockets CMS: WordPress, Strapi, Sanity, Contentful DevOps & Cloud: AWS (EC2, S3, Lambda), Docker, GitHub Actions, Heroku, Vercel, Netlify 📱 Mobile App Development Expertise Cross-platform: Flutter, React Native Native: Swift (iOS), Kotlin/Java (Android) Backend & APIs: Firebase, Supabase, Node.js, Laravel Features: Push Notifications, Real-time Chat, Maps Integration, In-App Purchases, Camera, Biometric Auth 🛠️ Additional Skills Agile / Scrum methodology CI/CD pipelines Unit & integration testing (Jest, Mocha, Flutter test) 🌍 Why Clients Choose Me ✔️ Clear and timely communication ✔️ Pixel-perfect implementation ✔️ Deadline-focused and quality-driven ✔️ Ongoing support even after project completion ✔️ New on upwork but experienced in industry. Let’s turn your idea into a working solution that performs and grows with your business. Ready to talk? Hit the Invite button and let’s get started!

Hi - 𝗜'𝗺 𝗮 𝗧𝗿𝘂𝘀𝘁𝗲𝗱 𝗧𝗼𝗽 𝗥𝗮𝘁𝗲𝗱 𝗣𝗹𝘂𝘀 𝗳𝗿𝗲𝗲𝗹𝗮𝗻𝗰𝗲𝗿 𝘄𝗶𝘁𝗵 𝗮 𝟭𝟬𝟬% 𝘀𝘂𝗰𝗰𝗲𝘀𝘀 𝗿𝗮𝘁𝗲, 𝗜 𝗽𝗿𝗼𝘃𝗶𝗱𝗲 𝗲𝘅𝗽𝗲𝗿𝘁 𝘁𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝘀𝗸𝗶𝗹𝗹𝘀 𝗮𝗻𝗱 𝘀𝘁𝗿𝗮𝘁𝗲𝗴𝗶𝗰 𝗶𝗻𝘀𝗶𝗴𝗵𝘁𝘀 𝘁𝗼 𝗵𝗲𝗹𝗽 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁𝘀 𝘀𝘂𝗰𝗰𝗲𝗲𝗱 𝗰𝗼𝗺𝗽𝗹𝗲𝘁𝗲𝗹𝘆. With over 10 years of dedicated experience in the full lifecycle of web application design and development, I possess a deep understanding of building sophisticated and scalable solutions. My core strengths are firmly rooted in the Microsoft and JavaScript ecosystems, making me particularly well-suited for your project needs. 𝗖𝗼𝗿𝗲 𝗦𝗸𝗶𝗹𝗹𝘀 ✅ C#, .Net ✅ .NET 6, .NET 7, .NET 8, .NET Framework, .Net Core ✅ ASP.NET, ASP.NET Core, ASP.NET MVC, ASP.NET Web Forms ✅ ASP.NET Web API, MVC with Razor Views, VB.NET ✅ Node.js, Express.js, Nest.js, Entity Framework, Entity Framework Core ✅ React js development ✅ Angular JS development ✅ Next js development, Redux | Flux ✅ TypeScript | JavaScript | jQuery 𝗛𝗲𝗿𝗲’𝘀 𝗛𝗼𝘄 𝗜 𝗠𝗮𝗸𝗲 𝗬𝗼𝘂𝗿 𝗣𝗿𝗼𝗷𝗲𝗰𝘁 𝗦𝗵𝗶𝗻𝗲: - Crafting responsive web applications that look and perform beautifully on any device - Writing clean, organized code that’s easy to maintain and scale - Rapidly developing MVPs on Bubble.io and delivering high-quality no-code solutions - Optimizing performance for fast, efficient user experiences - Offering ongoing support post-launch to ensure everything runs perfectly. I believe a successful project is built on strong collaboration and open communication. Hit that 𝗕𝗜𝗚 𝗚𝗥𝗘𝗘𝗡 𝗕𝗨𝗧𝗧𝗢𝗡 right now and send me a message. Let's build something amazing together! Manu M. Keywords ASP.NET Core C# ASP.NET MVC Java Core PHP .NET Framework WebSockets Web Application Website API Design ReactJS Next.js TypeScript HTML5 CSS3 SCSS / SASS Bootstrap Tailwind CSS Material-UI Angular JavaScript Responsive Design Back-End Development Node.js Nest.js Express.js MERN Stack RESTful APIs GraphQL Microservices API Development Web App Developer Databases & Data Management SQL PostgreSQL MySQL MongoDB DynamoDB Database Administrator Database Specialist Cloud & DevOps AWS (Amazon Web Services) Azure Cloud Platforms Docker Containerization CI/CD Jenkins S3 EC2 Azure DevOps Full Stack Developer Frontend Developer Backend Developer Web Development Specialist Agile Project MVP Development Performance Optimization Specializations & Integrations Ecommerce Website Third-Party APIs Integration Charts 3D Visualization Browser Extension Web App Developer UX/UI Design Figma NET Framework Expert .NET Core Expert C# Expert, Azure Specialist ASP.NET Core Specialist ASP.NET Core MVC .NET Core MVC, SQL Expert Expert .NET Developer .NET Framework Expert .NET Core Expert, C# Expert, Azure Specialist ASP.NET Core Specialist ASP.NET Core MVC .NET Core MVC SQL Expert Expert .NET Developer .NET Framework Expert .NET Core Expert C# Expert, Azure Specialist ASP.NET Core Specialist ASP.NET Core MVC

I help startups and businesses build scalable SaaS platforms, AI-powered apps, marketplaces, internal tools, and MVPs using AI tools, Bubble, APIs, OpenAI integrations, and full-stack architecture. I have worked and still work with Enterprise companies on Enterprise projects. Software Engineer and Bubble developer with 9+ years of experience building SaaS platforms, marketplaces, and AI-powered web applications. I help startups and companies build MVPs fast using Bubble, AI integrations, and scalable architecture. I have built 120+ projects, from simple MVPs to complex platforms with thousands of users. What I specialize in: • Bubble full-stack development (frontend, backend, database) • Lovable • Claude • AI integrations (OpenAI, ChatGPT, Gemini) • SaaS platforms & marketplace development • API integrations (Stripe, Twilio, Meta, custom APIs) • Automation (n8n, Zapier) • Scalable architecture & performance optimization AI-powered development approach I actively use modern AI tools like Lovable, Claude and Buildprint to speed up development and deliver features significantly faster, while maintaining high quality. Technical background • Bachelor’s degree in Computer Science • Master’s degree in Software Engineering • Strong experience in traditional programming (JavaScript, Java, PHP, Angular, MySQL) This allows me to go beyond no-code and handle complex logic, integrations, and scalable systems properly. Why clients choose me: • Clean, scalable Bubble apps (not messy builds) • Fast MVP delivery with strong product thinking • Clear communication & structured workflow • Reliable long-term collaboration I have worked with international clients (US, UK, Norway, etc.) on complex SaaS platforms, marketplaces, CRMs, and AI applications. If you are looking for a Software Developer who understands traditional coding, Vibe Coding No-code (Bubble) and AI, and can deliver fast, scalable, and AI-powered solutions - let’s talk.