Building Scalable Mobile Apps, SaaS Platforms & AI-Powered Products I can help startups, founders, and businesses transform ideas into production-ready mobile applications, SaaS platforms, and AI-powered solutions that are built for performance, scalability, and long-term growth. Whether you're launching an MVP, modernising an existing product, or integrating AI capabilities, I can help you build reliable software that delivers real business value. What I Can Build: - Mobile Applications (Flutter, React Native, FlutterFlow, Android, iOS) - AI-Powered Apps using OpenAI, ChatGPT & Claude - SaaS Platforms, Dashboards & Admin Panels - Subscription & Membership Systems - Real-Time Applications with Chat, GPS & Notifications - Payment Integrations (Stripe, Razorpay, In-App Purchases) - Custom APIs & Cloud-Based Backends Core Technologies Frontend & Mobile Flutter | React Native | FlutterFlow | Dart | Android | iOS | Kotlin | Java | Swift Backend & Cloud Node.js | Firebase | Supabase | REST APIs | Cloud Functions | Authentication | Security AI & Automation OpenAI | ChatGPT | Claude | AI Agents | LLM Integrations | Workflow Automation Industry Experience FinTech | SaaS | Logistics | CRM | Business Automation | Education | Food Delivery | AI Products | Marketplace Platforms Why choose me: - Product-first approach focused on business outcomes - Expertise in Flutter and React Native for cross-platform mobile development - Scalable and maintainable architecture - Clean, high-quality code - Transparent communication and regular updates - End-to-end support from planning to deployment If you're looking for a developer who can build, scale, or enhance your Flutter or React Native mobile app, SaaS platform, or AI-powered product, let's discuss your project and turn your vision into reality.

Most companies don't have an app problem. They have an impact problem. 📊 We've spent 15+ years building mobile and web products, and one thing keeps proving true: Great apps aren't defined by the tech stack behind them. They're defined by the problems they actually solve - faster, smarter, and at scale. That's the bar we set for every project we take on. 💡 Here's what that looks like in practice: 📱 Mobile apps built to retain, not just launch → AI-powered React Native & Flutter apps designed around real user behavior → Voice assistants, ChatGPT/Claude integrations, and real-time media features → Built to scale from MVP to enterprise from day one 💻 Web platforms built to grow, not just run → AI-enabled SaaS platforms on Laravel, Node.js & React.js → Automation that removes manual bottlenecks from your workflows → Legacy systems rebuilt into clean, AI-ready architecture → Cloud deployment on AWS & DigitalOcean with CI/CD baked in 🤖 AI built to deliver ROI, not just headlines → OpenAI, Claude & Google API integrations tied to real workflows → Dashboards that turn raw data into clear decisions → Smarter systems that cut cost, save time, and scale with you What sets us apart? We don't build it, ship it, and vanish. 🚫 We map your idea into a clear, actionable roadmap. We build fast, clean, and with the future in mind. And we stay involved long after launch, because growth doesn't stop at deployment. ✔ 15+ years across mobile, web & AI-driven products ✔ Clear, jargon-free communication at every step ✔ Long-term partnership, not a one-off vendor relationship ✔ Products people actually use — and businesses actually rely on The smartest investment you can make in 2025? A product that works harder than your team does. 💪 That's exactly what we build. 📩 Have a project idea, a system that's holding you back, or a product that needs stronger foundations? Comment or DM us - let's turn it into something measurable. 👇 #ProductDevelopment #AIIntegration #MobileApps #SaaS #ReactNative #Flutter #WebDevelopment #AIEngineering #TechTeam #BuildInPublic

𝐇𝐞𝐲 𝐭𝐡𝐞𝐫𝐞! 👋 𝐈’𝐦 𝐀𝐥𝐞𝐱𝐞𝐲, a Senior Full Stack Web Developer specializing in MERN and .NET development for modern web platforms, SaaS products, and scalable business applications. As a Senior Full Stack Web Developer, I work across the entire development cycle building reliable frontend and backend systems using MERN stack technologies and .NET backend solutions. If you're looking for a Senior Full Stack Web Developer with strong experience in MERN and .NET, who can build scalable and production ready platforms, you're in the right place. I help companies turn product ideas into fully working platforms using MERN architecture and .NET backend services, delivering clean, maintainable code and stable long term solutions. 🔸 Clean and scalable architecture 🔸 Strong backend logic with .NET 🔸 Modern frontend development with MERN stack 🔸 Clear communication and reliable delivery 🚀 𝐂𝐨𝐫𝐞 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 As a Senior Full Stack Web Developer, I build complex web platforms using MERN and .NET technologies, including: • SaaS platforms and business applications • Admin dashboards and management systems • Marketplaces and booking platforms • Real estate and property management systems • Subscription based web products • High performance web applications built with MERN and .NET My experience as a Senior Full Stack Web Developer working with MERN and .NET allows me to build systems that are stable, scalable, and ready for real production use. ⚙️ 𝐖𝐡𝐚𝐭 𝐈 𝐂𝐚𝐧 𝐁𝐮𝐢𝐥𝐝 𝐅𝐨𝐫 𝐘𝐨𝐮 As a Senior Full Stack Web Developer specializing in MERN and .NET, I can help build complete platforms including: ✅ Full stack web applications using MERN and .NET ✅ SaaS platforms with complex business logic ✅ Admin panels and dashboards ✅ REST APIs built with .NET backend architecture ✅ Scalable backend services using .NET ✅ Modern responsive frontend applications built with MERN stack technologies ✅ Marketplace and booking platforms ✅ Payment integrations and subscription systems 🧰 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤 Frontend:React | Next.js | JavaScript | TypeScript Backend: Node.js | Express.js | .NET ASP.NET Database: MongoDB | PostgreSQL | SQL Server Tools: Docker | Git | REST APIs | Cloud platforms 🌟 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞 Senior level development experience Strong expertise in MERN and .NET development Ability to handle both frontend and backend architecture Experience building scalable SaaS platforms Focus on clean, maintainable production code If you're looking for a Senior Full Stack Web Developer with strong expertise in MERN and .NET, feel free to reach out. 💬 Send me a message and let's discuss your project.

Want to work with one of the 🏆 BEST Freelancers in Social Media Management (Top 3%)? The person who managed +50 accounts ONLY THE PAST YEAR ALONE? One of the best Top Rated Plus 🥇 Social Media Managers and Content Creators on Upwork, having completed +300 jobs successfully and worked with 100s of companies from different industries with 4.9 ⭐ on average and a 98% Job Success Score. My clients are saving hundreds of hours while keeping their Social Media pages optimized at the highest level. My personal favorite client quotes (You can check them in my portfolio): ⚡ I look forward to driving huge momentum in our business together in the coming months ⚡ We are getting great results from the social media posts that are being created ⚡ He was able to provide top-notch content and also had an established and well-documented process that made it very easy to work with him. ⚡ My branding on all my social media platforms is now more consistent and has improved dramatically! My clients are getting more consistent and branded content for their Social Media pages while growing their Social Media Pages organically with a 100% targeted real and active audience with new followers coming in every single day. Not everyone is my ideal client, but we may be a PERFECT FIT If you are thinking: 🤔 📌 “I don’t have time to run my Social Media pages” 📌 “Hiring a team to handle my pages is too expensive and requires training” 📌 “For me Social Media is Chinese, I’m not Social Media Savy” 📌 “I need my Social Media pages to reflect my business” 📌 “I want someone who can completely take over my Social Media pages and stay in of current trends and special holidays” 📌 “I don’t want to spend more than 5 minutes per week reviewing content” Working with me, you will… 💎 Get professional, branded and custom graphics created for your Social Media that align to your business goals for Social Media 💎 Have control of all the content that’s being scheduled (Will take you LESS THAN 5 MINUTES per week to approve the content) 💎 Get recommendations and feedback based on the best practices for the Social Media of your business 💎 Ensure a good and growing Social Media presence for your business to stay connected to your followers and customers 💎 Rest assured your Social Media pages are in good hands and will get the best results. Don’t take just my word. My clients have A LOT to say about me: ⭐ Antonio is very good at what he does and provides a professional service that has exceeded my expectations. He has my vote of confidence and would recommend him to any other busy business owner. ⭐ Antonio is very good at what he does. I like the way he organized things. He revised based on request and adapted to my style, flexibility. This is one of the provider you can keep for very long term and this is my intention to work with him as long as I'm in business. ⭐ Working with Antonio is one of those rare experiences where you come across someone professional, have great standards of work, is timely, goes above and beyond and is a genuine pleasure to work with. ⭐ Antonio was by far the best individual I have worked alongside of when it comes to Upwork. He was very helpful in his suggestions, as a newbie to business. ⭐ I can't thank Antonio enough for his consistently fantastic work. His communication is fantastic - which is a big thing for me. He is always on hand to answer questions, is very polite and I feel we can collaborate and discuss ideas together. ⭐ The work itself - the designs and social media management - is delivered to an exceptionally high standard. Would I recommend Antonio to others? 100% - hire this man, he is brilliant. Thank you for your great work Antonio." I have experience with the following: Creating a Content Strategy, along with Top Notch graphics, videos, reels, and all type of content for Social Media using your branding guidelines. Managing your Social Media pages: Instagram, Facebook, Twitter, LinkedIn, Pinterest, Google My Business, Tiktok, and Youtube. Growing your accounts consistently and providing reports with the results we are getting. My Stats: 🔥 +70 5-Star reviews 🔥 Top Rated Plus 🔥 +300 Jobs Completed Successfully 🔥 Top 3% Talent On Upwork 🔥 +1000 hours worked on Upwork 🔥 +98% Job Success Score 🔥 4.9 Stars on Average Sound like a fit? Next steps: 👉 1) Watch the videos on my Upwork profile and in my work examples 👉 2) Click the “Invite to Job” or “Send a Message” button 👉 3) Write me a personalized message regarding what you need help with I get around 3 new invites to jobs every single day so act fast If you’d like to get started asap! My Expertise: Social Media Management, Social Media Strategy, Social Media Content Creation, Social Media Graphic Design, Short form video editing, Captions Writing, Hashtags Research, Social Media Content Scheduling, Social Media Audit, Social Media Marketing, Social Media Organic Growth, Social Media video editing.

💥 Hi you! I am Oksana, a Senior Shopify/Webflow developer and UI/UX designer with over 13 years of industry experience. As part of my comprehensive approach, I play a critical role in ensuring the creation of a top notch solutions for digital products. My passion lies in crafting immersive and user-centric experiences that not only captivate audiences but also drive tangible results for businesses. I invite you to reach out to me for a complimentary 30-minute consultation to explore the possibilities of creating a successful project together. ✅ Key tools/services in my web design and development arsenal include: ✨UI/UX design: - Figma ✨Webflow: - Custom Webflow websites - Webflow websites using pre-made templates - Client-first Finsweet framework - Relume library - Figma/Adobe XD to Webflow - Memberstack - Zapier - Airtable - Technical SEO - Page speed optimization ✨Shopify: - Shopify Plus - Shopify themes - Liquid - Recharge - Custom coding - Conversion rate optimization - Store setup ✅ What I offer: - Strategic Design & Development Thinking - Innovative Solutions - User-Centered Design - Cross-Platform Expertise - Collaborative Approach Ready to take your digital presence to the next level? Let's collaborate to turn your vision into reality! KEYWORDS: Webflow, Webflow Website Development, Webflow Website Design, Custom Webflow Website, Webflow Website Using Pre-made Template, Webflow Technical SEO Optimization, Webflow Performance Optimization, Webflow Animations, Webflow Landing Page, Webflow Corporate Website, Webflow Website From Scratch, Webflow E-commerce Website, Webflow E-commerce Website Design, Webflow E-commerce Website Development, Webflow Responsive Design, Webflow CRO, Figma To Webflow, Adobe XD to Webflow, Mobile-First Design, Shopify Website Design, Shopify Website Development, Shopify Website Creation From Scratch, E-commerce Website Creation, E-commerce Website Creation From Scratch, Shopify Website Optimization, Shopify Website Performance Optimization, Shopify Website Page Speed Optimization, Shopify Website CRO, custom E-commerce Website, Shopify Website Using Pre-made Template, Shopify Store, Shopify Store Design, Shopify Store Development, Shopify Store From Scratch, Shopify Store Design from Scratch, Shopify Store Development From Scratch, Shopify Store Adjustments, Shopify Store Modifications, Shopify Store Tweaks, Shopify Website Adjustments, Shopify Website Modifications, Shopify Website Tweaks, UI/UX Design, UI/UX Design in Figma, Figma Design, Figma Design From Scratch, Website Design, Website Development, Corporate Website. Last updated: 29.07.2026

🏆 𝗧𝗢𝗣 𝗥𝗔𝗧𝗘𝗗 𝗣𝗟𝗨𝗦 𝗙𝗨𝗟𝗟-𝗦𝗧𝗔𝗖𝗞 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗘𝗥 🏆 I build scalable web and mobile applications using MERN stack, Flutter, and React Native, with modern AI integrations. With years of experience and 6,000+ Upwork hours, I help startups and businesses transform ideas into production-ready SaaS platforms, web apps, and mobile applications. From MVP development to full-scale platforms, I handle the complete product lifecycle - architecture, development, integrations, and deployment. What I Build- 🌐 Web Applications • Full-stack web apps using MongoDB, Express, React, Node.js • SaaS platforms and business dashboards • Admin panels and analytics systems • REST and GraphQL APIs • Scalable backend architecture 📱 Mobile Applications • Cross-platform apps using Flutter and React Native • iOS and Android app development • Real-time features, notifications, and integrations • App Store and Play Store deployment • High-performance mobile user experience 🤖 AI-Powered Features • AI chatbots and assistants • OpenAI / LLM integrations • AI recommendations and automation workflows • Intelligent features integrated into web and mobile apps Startup & MVP Development I work closely with founders to build and launch products quickly. • Rapid MVP development • SaaS and marketplace platforms • Mobile-first startup products • Scalable architecture from the beginning Tech Stack Web Development MERN Stack (MongoDB, Express, React, Node.js) Next.js TypeScript Mobile Development Flutter React Native Backend & APIs Node.js REST APIs GraphQL Databases MongoDB PostgreSQL Firebase Cloud & DevOps AWS Vercel Docker CI/CD What Clients Hire Me For ✔ Web and mobile application development ✔ SaaS platform development ✔ Startup MVP development ✔ AI-powered product features ✔ Backend systems and API development Why Clients Work With Me ✔ 10+ years of development experience ✔ 6,000+ hours on Upwork ✔ Expertise across web and mobile ecosystems ✔ Clean, scalable, production-ready architecture ✔ Clear communication and reliable delivery 📩 If you're planning to build a web platform, mobile app, or AI-powered SaaS product, feel free to reach out and let's discuss your project.

I’m a Senior AI Developer with 11+ years of hands-on experience in Machine Learning, Deep Learning, Natural Language Processing (NLP), Computer Vision, and Data Science, building intelligent systems that think, see, speak, and create like humans. Over the past decade, I’ve successfully delivered 70+ AI projects across startups, agencies, and enterprises - consistently improving performance, efficiency, and business outcomes with measurable impact. **Key Achievements & Results: - Increased model accuracy from 76% → 98.4% on large-scale prediction systems. - Reduced manual workloads by up to 90% through end-to-end AI automation. - Delivered AI pipelines processing over 1.5 TB of data daily with real-time insights. - Built AI chatbots handling 100K+ daily user interactions and improving engagement by 240%. - Created AI art and video generation platforms producing 250,000+ unique creative assets monthly, cutting production costs by 70%. - Developed computer vision solutions with YOLOv8 + PyTorch reaching 99.2% detection accuracy and <45ms response time. - Integrated predictive analytics models that boosted marketing ROI by 52% and sales forecasting accuracy by 33%. **Core Skills & Tech Stack: - AI & Machine Learning: Machine Learning, Deep Learning, Neural Networks, Artificial Intelligence - Frameworks & Tools: TensorFlow, PyTorch, Scikit-Learn, OpenCV, FastAPI, LangChain Programming: Python, JavaScript - Specialties: Natural Language Processing (NLP), Computer Vision, AI Chatbots, AI Art & Video Generation, Data Science, Predictive Analytics - Methodologies: Reinforcement Learning, Transfer Learning, Model Optimization, LLM Integration I have strong experience in Python, TensorFlow, PyTorch, NLP, and Computer Vision, and I’ve deployed production-grade AI systems that run across cloud platforms, handle millions of data points, and deliver real business value - not just prototypes. **Project Highlights: - AI Chatbot Platform: (OpenAI + LangChain + FastAPI) - scaled to over 120K+ users/day, reducing support response time by 80%. - AI Art & Video Generator: for a creative brand - automated visual production, generating 10K+ unique videos weekly and saving hundreds of man-hours per month. - Computer Vision App: YOLOv8 + PyTorch real-time detection system - processed 1.2M frames/day with 99% precision. - Data Science Engine: built a predictive analytics model that increased lead conversion by 41% and optimized ad spend by 28%. - NLP Pipeline: fine-tuned BERT-based models to process 10M+ text entries, achieving 98% sentiment accuracy. I’m passionate about Artificial Intelligence, Machine Learning, NLP, Deep Learning, and Computer Vision - creating AI systems that learn, adapt, and perform at scale. If you need someone who combines creative thinking, deep technical expertise, and business-driven AI strategy, I’m the one to turn your idea into a high-performance, scalable AI product. What’s the most ambitious AI project you’d like to bring to life next?

I build and ship React Native and Flutter apps for iOS, Android, and iPadOS — 28 Upwork jobs, 2,700+ hours, and $200K+ earned, including a golf-scoring iOS app built over 1,100+ hours and rated 5.0★. I take products from Figma to App Store and Play Store approval — including the parts people underestimate: review rejections, store metadata, crash-free releases, and post-launch support. 🔹 What I build ● Cross-platform apps in React Native and Flutter — one codebase, native feel on both stores ● Native capability — camera, maps, push notifications, in-app purchases, payments, offline-first sync ● iPad and desktop experiences — layouts for large screens, multitasking, field and operations tools ● App rescues — performance fixes, upgrades of aging codebases, store-rejection turnarounds 🔹 Results you can verify in my work history ● Golf tournament scoring iOS app — 1,118 hours over 14 months, 5.0★, still in production ● App development & publishing support — 5.0★: "highly responsive, knowledgeable, and efficient in debugging" ● End-to-end product prototype — 120 hours, 5.0★: "Rahul has this amazing quality where he not only understands your idea but also helps finetune it" ● Flutter app with interactive map + LMS features — 270 hours, 5.0★ ● Flutter app with a 3D challenge — 5.0★: "quickly understood the project requirements and delivered the first results in a timely manner" ● White-label SaaS app in React Native + Firebase — 5.0★ 🔹 How I work Weekly builds you can actually install (TestFlight / internal testing track), milestones on fixed-price work, and honest estimates. If a store review is going to be a problem, you'll hear it from me before submission — not after. A client put it plainly: "met deadlines and above expectation." 🔹 Stack React Native, Flutter, Dart, TypeScript, JavaScript, Expo & EAS, Firebase, Supabase, GraphQL, REST, Node.js, FastAPI, PostgreSQL, Redux, Zustand, Riverpod, GetX, App Store Connect, Google Play Console. Backed by Hestabit — an ISO 27001 and SOC 2 Type II certified team — when your app needs design, QA, or backend alongside development. If you need a mobile app built, finished, or fixed, send me the job details and where you're stuck — I'll reply with a concrete plan, timeline, and cost.

🏆 𝟕+ Years Full Stack Development | 𝟐𝟎𝟎+ Completed Projects | 𝟏𝟎𝟎+ Satisfied Clients 🎓 𝐌𝐄𝐑𝐍 Stack Specialist | 𝐑𝐞𝐚𝐜𝐭 | 𝐍𝐨𝐝𝐞.𝐣𝐬 | 𝐀𝐈 𝐒𝐚𝐚𝐒 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ EXPERIENCE HIGHLIGHTS ✔ 10+ Years Full Stack Development ✔ MERN Stack Specialist ✔ AI SaaS Expert ✔ 10+ Years Multinational Organization Experience ✔ Production-Ready Solutions Only ✔ 7+ Years Building Scalable Web Applications ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ I build scalable MERN stack applications, AI SaaS platforms, and production-ready web applications that perform at scale. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHAT I BUILD ✔ Full Stack MERN Stack Applications ✔ AI SaaS Development & AI Chatbots ✔ Scalable Web Applications ✔ REST API & GraphQL API Development ✔ Real-time Web Applications ✔ Authentication Systems & Payment Integration ✔ Database Design & Optimization ✔ Performance Optimization & DevOps ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ EXPERTISE Frontend: React.js, Next.js, TypeScript, Redux, Tailwind CSS Backend: Node.js, Express.js, REST API, GraphQL, NestJS AI/LLM: OpenAI, ChatGPT, Claude, RAG Systems, Vector Search Database: MongoDB, PostgreSQL, MySQL, Optimization Cloud: AWS Deployment, Git, CI/CD, Production Ready ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHY CLIENTS CHOOSE ME ✔ 10+ years proven full-stack development ✔ MERN stack specialist ✔ AI SaaS expert ✔ Clean, scalable, production-ready code ✔ Reliable delivery & clear communication ✔ Long-term partnership approach ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Ready to build? Message me for a free 30-minute consultation call. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Keywords: Full Stack Developer | MERN Stack Developer | React.js Developer | Node.js Developer | Full Stack Web Development | Web Application Developer | Scalable Web Applications | REST API Development | GraphQL API | AI SaaS Development | AI Chatbot | ChatGPT Integration | OpenAI API | Claude API | RAG Systems | Backend Development | Frontend Development | Database Design | MongoDB Developer | PostgreSQL | Authentication Systems | Payment Integration | Real-time Applications | WebSockets | AWS Deployment | Git & GitHub | CI/CD Pipeline | JavaScript Developer | TypeScript Developer | Next.js Developer | Express.js | NestJS | Production-Ready Code | Performance Optimization | System Architecture | Startup MVP | SaaS Platform | Custom Web Development | API Integration | Third-party Integration | Stripe Integration | Database Optimization | Testing | Jest | Code Quality | Enterprise Software | Microservices | Scalable Systems | Clean Code | Long-term Support | Business Focus | 10+ Years Experience | Senior Developer | Experienced Developer | Full Stack Expert | MERN Stack Expert | AI Integration Expert | LLM Expert | Prompt Engineering | Vector Database | Embeddings | Knowledge Base | AI-Powered Applications | Machine Learning Integration

✅ Top Rated Plus Digital Marketer ✅ In Top 3% Talent on Upwork ✅ 2000+ Hours on Upwork ✅ 13+ Years of Experience ✅ 100% Client Satisfaction I’m Tosif, a digital marketing strategist with 13+ years of hands-on experience helping businesses increase visibility, generate qualified leads, and grow revenue through data-driven marketing. My expertise spans SEO, SEM, PPC, and Social Media Marketing, with a strong focus on combining proven marketing strategies with AI-powered SEO techniques to achieve faster and more sustainable results. I focus on metrics that directly impact business growth rankings, traffic, leads, and conversions. Over the years, I've worked with eCommerce, B2B, and B2C brands, helping them recover from traffic drops, improve search visibility, scale paid advertising campaigns, and build long-term growth systems that deliver measurable ROI. As a Top Rated Plus freelancer on Upwork, ranking among the top 3% of talent on the platform, I have consistently delivered high-quality work, maintained exceptional client relationships, and achieved outstanding project outcomes. Clients choose to work with me because I provide clear communication, honest recommendations, and strategies tailored to their business goals not generic templates or unrealistic promises. If you're looking for a marketing partner who understands both digital marketing and business growth, let's connect and discuss how I can help. Tosif