AI SaaS architect, senior full-stack developer, AI developer, and automation expert. I build LLM/RAG systems, AI agents, agentic workflows, ChatGPT and OpenAI integrations, and production SaaS platforms that ship in 2–4 weeks. No prototypes. No disappearing after handoff. Founders and CTOs don't call me first. They call after the offshore agency delivered a half-working prototype. After the generalist ran out of depth. When the stakes are too high to get it wrong again — that's when they call me. I work like a technical co-founder: I understand your business problem as clearly as the technical one. No account-manager layer, no junior handoff. You work directly with senior engineering across architecture, implementation, deployment, and the post-launch fixes that real systems always need. Over 70% of clients come back for another engagement — because trust is easier to earn through delivery than through proposals. 📈 PRODUCTION RESULTS ✅ n8n + GPT-4 replaced a 12-person workflow — 10,000+ records/day at 99.2% accuracy, saving $380K/year. Shipped in 3 weeks. ✅ Flutter + Node.js fintech SaaS processing $2M+/month — 3 years ongoing, same client. ✅ React + LangChain legal AI tool — cut attorney document review time by 73%. ✅ Next.js + Supabase multi-tenant SaaS with Stripe — zero to $45K MRR in 5 months. ✅ Cross-platform Flutter app — 50,000+ active users across iOS, Android, and desktop. ✅ OCR + GPT-4 + LangChain document pipeline for logistics — 8x throughput, same headcount. ✅ HIPAA-compliant clinical RAG system — delivered in 5 weeks. ✅ Loan-decision latency cut from 4.2s to 280ms for a Series-A lender. ✅ Author of ngx-mask — 2M+ monthly npm downloads, used in fintech, healthcare, and enterprise SaaS worldwide. 🛠️ WHAT I BUILD → LLM/RAG features — OpenAI, Claude, Gemini, ChatGPT, RAG pipelines, AI agents, multi-agent systems, agentic workflows, semantic search, vector databases, embeddings. Evals, latency, observability, fallback paths included. → AI SaaS platforms, MVPs & PoCs — multi-tenant architecture, Stripe billing, RBAC, onboarding, analytics, CI/CD. From validated PoC to production-grade platform without rebuilding from scratch. → AI workflow automation — n8n + LLM pipelines replacing manual ops, copy-paste, spreadsheet cleanup, CRM updates. Human-in-the-loop review flows. 10,000+ records/day at 99%+ accuracy. → Cross-platform apps — Flutter developer, React Native developer, Expo. iOS, Android, web, and desktop from one codebase. Real backends, auth, payments, analytics. 50K+ users delivered. → Production backends — Node.js developer, NestJS, FastAPI, Next.js API routes, Supabase, PostgreSQL, event-driven architecture. Fintech, legal tech, healthtech, logistics — compliance-ready from day one. → Codebase rescue & audit — stalled builds, prototype rewrites, architecture reviews. Salvaged a $200K stalled build in 3 weeks. 🏭 INDUSTRIES → FinTech AI — underwriting automation, payment flows, real-time risk scoring, compliance-ready backends. → HealthTech AI — HIPAA-compliant RAG, clinical document processing, patient-facing AI workflows. → Legal AI — contract review, document intelligence, LLM-powered research tools. → Logistics & E-commerce — OCR pipelines, routing automation, AI-powered search, inventory automation. → RevOps & Enterprise SaaS — AI lead scoring, CRM automation, multi-tenant platforms, developer tooling. ⚙️ TECH STACK 🤖 AI/LLM: OpenAI API · ChatGPT · Claude API · Gemini · GPT-4 · LangChain · LangGraph · LlamaIndex · Pinecone · pgvector · RAG · Prompt Engineering · Vector Search · Embeddings · AI Agents 🖥️ Frontend: React developer · Next.js developer · TypeScript developer · Angular · Tailwind CSS · Flutter developer · React Native developer · Expo 🔧 Backend: Node.js developer · NestJS · Python developer · FastAPI 🗄️ Databases: PostgreSQL · Redis · MongoDB · Supabase · Firebase ☁️ Cloud: AWS · Docker · Kubernetes · GitHub Actions · Vercel · CI/CD ⚡ Automation: n8n · Make · Zapier 🚀 WAYS TO START → AI SaaS PoC in 72 hours — validate before committing full budget. Fixed scope, fixed price. → MVP in 2–4 weeks — production-grade from day one. Not a prototype. → LLM/RAG system in 2–4 weeks — production-ready, not a demo. → SaaS web app — Next.js developer + Supabase + Vercel, Stripe, auth, RBAC, CI/CD. → AI automation pipeline — n8n + LLM replacing manual ops. Shipped and running. → Codebase rescue — stalled build, architecture audit, prototype rewrite. → Architecture consultation — 60-min deep-dive into your AI strategy or SaaS system design. 🚫 NOT THE RIGHT FIT IF YOU need execution without architectural thinking, are optimizing for the lowest rate over ROI, or want someone who disappears at handoff. 📩 READY TO BUILD? Send me what you're building, where you're stuck, and what done looks like. I'll respond with the right questions, a proposed architecture, and clear next steps — usually within a few hours.

I build the mobile apps that can't fail: official Amazon Location Android SDKs, ONWARD Medical's ARC-EX (a first-of-its-kind FDA-cleared spinal cord stimulator), and Fibe, a fintech lending app with 10M+ downloads. I'm usually hired when a project involves more than standard app screens: real-time systems, BLE/IoT, AI, payments, hardware integrations, maps, regulated workflows, or complex architecture that needs senior ownership. 𝐂𝐨𝐫𝐞 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 ▪ Android: Kotlin, Java, Jetpack Compose, MVVM, Clean Architecture ▪ iOS: Swift, SwiftUI, native SDKs, platform channels ▪ Cross-platform: Flutter and Kotlin Multiplatform (KMM) ▪ BLE, IoT & hardware: medical devices, robotics, wearables, connected products ▪ Real-time: WebRTC, Socket Programming, Twilio, video, low-latency chat ▪ Maps & location: geofencing, live tracking, routing, custom SDKs ▪ Fintech & payments: wallets, KYC, subscriptions, payment gateways ▪ AI features: streaming chat, character memory, LLM integrations, on-device ML ▪ App rescue: refactoring, crash fixing, performance tuning, architecture cleanup 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐇𝐢𝐫𝐞 𝐌𝐞 ① The app needs to scale: millions of users, peak traffic, complex state, performance-sensitive flows. ② The app cannot fail: medical, fintech, real-time, hardware, or business-critical workflows where reliability is non-negotiable. ③ The app is technically difficult: BLE devices, AI, native SDKs, WebRTC, payments, maps, or legacy code that needs expert handling. ④ The product needs senior ownership: architecture, technical decisions, tradeoffs, code quality, and delivery without heavy supervision. 𝐇𝐨𝐰 𝐈 𝐖𝐨𝐫𝐤 ▪ I clarify the product goal, technical risks, and success criteria before writing code ▪ I break work into clear milestones, so progress is visible ▪ I share frequent updates and demo videos for major features ▪ I communicate tradeoffs directly instead of hiding problems ▪ I write production-grade code: clean architecture, reliable state management, testing, CI/CD readiness, maintainable structure With 10+ years and 25+ shipped apps (three with 1M+ users), I've worked across fintech, healthcare, AI, robotics, BLE/IoT, real-time communication, and developer SDKs, including public contributions to Amazon Location Service under the AWS Geospatial organization. If your mobile app is complex, high-value, scaling fast, connected to hardware, using AI, handling payments, or relying on real-time data, send me your goal, current stage, and biggest technical concern. I'll respond with a clear plan, a realistic timeline, and the safest way to move forward.

Expert Full Stack developer having skills in AI, Android, iOS & Web Development. I have 12 Years of experience in Mobile Application Development (Flutter/React Native), .Net, MERN Website Development and AI Driven softwares. 5 star rating from last 23 completed projects. My specialization is in building social networks, streaming apps, tools, utilities, e-commerce apps, consumer-facing products and B2B solutions. Integrated AI tools like Claude, OpenAI Codex, and GPT-based systems to accelerate code generation, documentation, and intelligent feature development (e.g., chatbots, sentiment analysis, recommendation systems). Designed and deployed AI-driven modules for predictive analytics, personalized content delivery, and automated decision-making in e-commerce and social apps. Developed voice and text-based assistants leveraging LLMs, Dialogflow, and OpenAI APIs, enhancing user engagement and customer support experiences. Leveraged machine learning pipelines for data-driven applications in domains such as healthcare, agriculture, and ad-tech—enabling smarter dashboards and business insights. - Website Skills: React, Angular, PHP, Wordpress, CakePHP, Magento, .Net, MySQL, CodeIgnitor etc. - Android/iOS: SWIFT, Java, J2EE, Objective C , C# , C++, C. - Hybrid framework: React Native, Flutter, Angular, NodeJS - Web service: XML/JSON, REST/SOAP - Cloud backend: Amazon S3 EC2 AWS, Firebase, Parse, Twillio - Online Payment Gateway: Paypal, Authorize.net, Stripe, PayUMoney, Braintree, Juspay - Tools: Visual Studio Code, X-Code, Android Studio, Netbeans, GitHub, Gitlab, Twilio I have done mobile applications ranging from Tiles manufacturing company, Hospitals, Pharmaceutical company to Entertainment applications like Kids ABCD and maths game. I have developed many web applications for ecommerce, agricultural warehouse management, Advertisement Network etc. With a growing focus on AI-powered automation, I combine software engineering expertise with next-gen AI capabilities to build digital products that are not only functional but also intelligent and future-ready.

Top Rated Plus | 18+ Years Experience | 100% Job Success Score I am a Senior Mobile Architect with over 18 years of experience in designing and delivering high-performance mobile applications. My focus is on helping businesses build scalable Android and iOS solutions that integrate modern technologies like Generative AI to solve real-world operational challenges. Throughout my career, I have delivered more than 600 projects, ranging from rapid MVPs for startups to complex enterprise systems for established firms. I don't just write code; I act as a technical partner to ensure your product is built with the right architecture, security, and user experience to drive actual business ROI. Technical Focus & Capabilities: Mobile Development for iOS & Android I specialize in cross-platform development using Flutter and React Native, as well as native development with Swift and Kotlin. My expertise covers the entire lifecycle of an app, including specialized workflows for Smartphone optimization, secure User Authentication systems, and personalized User Profile Creation. I am also experienced in refactoring legacy applications to meet modern performance standards. AI and Machine Learning Implementation I help businesses stay ahead by integrating Generative AI features into their mobile products. This includes implementing RAG-based architectures with OpenAI, Claude, and Gemini, as well as developing custom AI agents for workflow automation, intelligent search, and image recognition. Backend and Infrastructure To support high-traffic mobile apps, I build robust backends using the MERN stack (Node.js) and Python. My approach emphasizes data security and seamless integration with third-party APIs, payment gateways like Razorpay or Stripe, and identity verification systems. Industry Experience: I have a proven track record in several high-stakes industries: Fintech & SaaS: Building secure marketplaces and real-time financial tools. Legal & Tax-Tech: Developing specialized AI systems for document analysis and automated compliance. Logistics & Healthcare: Delivering HIPAA-compliant tracking systems and complex booking platforms. Why Work With Me? With a 100% Job Success Score and a Top Rated Plus status, I am committed to reliability and transparency. My goal is to reduce your technical debt and build a system that scales as your business grows. I have been recognized in global platforms like Forbes and HackerNoon for my contributions to the tech community, and I bring that same level of expertise to every client project. If you are looking for a reliable partner to take your mobile product from concept to a successful launch, let’s connect.

I help startups build and scale AI-powered web and mobile applications — from MVP to production. If you're looking to: Launch your MVP quickly and validate your idea Integrate AI into your product (chatbots, agents, automation, intelligent workflows) Scale an existing app with the right architecture and tech decisions You're in the right place. 🧩 What I Bring With $700K+ in project delivery, 100+ successful projects, and hands-on experience working with startups globally, I bring a strong mix of technical execution and product thinking. I don’t just build apps — I help you make the right decisions early, so you save time, reduce costs, and avoid rebuilding later. ⚙️ Core Expertise AI Integrations (OpenAI, AI workflows, automation) AI Agent Development Mobile App Development (React Native, Flutter, iOS, Android) Web App Development (Node.js, React, scalable backend systems) SaaS & MVP Development Product Strategy & Technical Consulting 🏆 Selected Startup Experience Contributed to Flyin — one of the largest OTA platforms in the Middle East (acquired by Cleartrip) Worked on Finku — a fintech startup selected by Y Combinator Built MVP for Relevo — which went on to raise 7-figure funding post-launch 🤝 How I Work Clear communication and fast execution Focus on business outcomes, not just development Flexible engagement (fixed cost, hourly, or ongoing support) 📩 Let’s Talk If you have an idea, an existing product, or want to explore how AI can improve your business — feel free to message me. I’m happy to share initial thoughts and direction before we get started.

Hello Clients, I am an expert in creating iOS and Android apps and games, TVOS apps. I know programming languages (Objective C, Swift, React Native, Flutter, Java, PHP,) and standard iOS frameworks (UIKit, Map-Kit, Sprite-Kit, etc.). My iOS and Android skills include: **************************************** iOS SKILLS • Animation and design: From simple swipe-based animations to complex GPU accelerated. • Experienced in Gesture Shape Library that allows Mobile devices to recognize players’ gesture drawing, such as circles, triangles. • In-App Purchase, Server Integration for Live Messaging and feedback or Social Network Updates • Maps: I have had eight years of experience with Google’s Maps SDK and Apple’s MapKit. Mapping (cartography) is quite an exciting and extensive field, but it can also be enjoyable and rewarding. • Core Data, Realm: I have years of experience with Core Data, however in recent years, I've started to prefer using Realm DB instead extensively. Core Data is quite old and requires a ton of boilerplate code that can be difficult to maintain; the Realm is significantly simpler and faster. • Security: This is often a highly overlooked factor, and it has never been more critical. I can quickly implement security techniques such as HTTPS, secure password hashing, and encryption to make an app secure • R&D. Ever since Apple introduced CoreML at WWDC a few months back, I've gotten quite skilled at training and efficiently implementing on-device neural networks to do all sorts of tasks such as image recognition, handwriting recognition, and so on. • Location Services: I have years of experience working with GPS data and Apple’s Location Services framework. • Web services. I have also implemented many web service-based applications. ANDROID SKILLS • Java, Kotlin • React Native, Redux • Flutter Dart • Rest API (Volley, Retrofit) • MVP pattern • RxJava, RxAndroid, RxJs • Cloud Services (Firebase, AWS) • Media files playback (recording, editing, storage, and streaming) • Local data storage (e.g., Realm, SQL) • Stress testing (there are many devices to test apps in any version of Android that allows me to catch all the bugs). Website Development skills - Website Development - Website Design, - API Development, - bootstrap, WordPress, html5, Shopify. - javascript, jquery, PHP, HTML. I enjoy delivering high-quality, well-structured code to my customers. I'm a very self-motivated, honest, and reliable person. I also have some experience in software design and testing. Working with me is a simple, friendly, and joyful experience - contact me to get us started! Thanks for your consideration.

Upwork certified Mobile App Developer, Senior Mobile App Developer, React Native, DevOps, React Developer, IOS mobile app Developer, Android mobile app Developer, Node.JS, TypeScript, Hybrid App Development, AI Mobile App Development, Web Development with experience in mobile app development for 10 years. I turn your bold ideas into reality✨ My responsibilities: ✅ Strong JavaScript development skills (TypeScript, ES6), React.js, React Native ✅ Strong experience with Node.js ✅ Expertise in MongoDB / NoSQL databases ✅ Strong object-oriented programming and design skills ✅ Experience with RESTful web services ✅Ability to solve problems independently ✅ Outstanding teamwork and communication skills ✅ Understanding of modern Mobile technologies ✅ Ability to quickly learn new technologies Skills & Expertise: ✅ TypeScript ✅ Node JS (Express / Nest) ✅ MongoDB / MySQL / Firebase ✅ Third-Party API integrations Be sure, I'll provide you with: ✅ Clean, bug-free and highly structured source code, check please my GitHub ✅ Regular report of project status with relevant deliverable Looks like I'm a superman? I'll let you in my secret: I am a part of Kit Global team, actually, I am CEO of mobile development company, and in the past a very strong back-end dev. We want your story to be a successful one, so we develop solutions that help our clients' businesses to grow. With exposure to multiple industry verticals, we enjoy working on innovative challenges and amend our working process to cater to your expectations. However, we only accept projects that we can handle and never waste time for trial and error process development. I have a strong grip over developing these below-listed domain's app: ✅ E-Commerce Apps ✅ Social Networking Apps ✅ Taxi Apps ✅ Chat & Dating Apps ✅ E- Learning App ✅ Health & Fitness Apps ✅ Food Delivery Apps ✅ Photo Editing & Sharing Apps ✅ Travel Apps ✅ Music & Video Player Apps ✅Telemedicine As a bonus, I offer you: ✅Q/A testing, application deployment ✅Free consulting and support I believe that communication is the key to a successful project, so please let me know a time to discuss that works best for you!

⭐️ Top Rated Plus – Top 2% on Upwork ✅ Official FlutterFlow Expert Partner ✅ Published on the FlutterFlow Marketplace ✅ 6+ years building scalable mobile apps 🕒 100+ apps delivered | 6+ years | 6,000+ hours You have an app idea, a product that needs fixing, or a feature that needs shipping. I build it in Flutter or FlutterFlow, faster than you expect, cleaner than you hoped, and ready for the App Store and Google Play from day one. I have delivered 100+ mobile apps across health, fintech, marketplace, SaaS, and AI verticals. Three of my apps are live in the stores right now. I am one of the few developers with a published component on the official FlutterFlow Marketplace, which means I do not just use the platform, I build for it. 📱 Flutter and FlutterFlow Development:- Cross-platform iOS and Android apps from a single codebase. Pixel-perfect UI that matches your designs. Rapid FlutterFlow MVPs or fully custom Flutter builds. Complex animations, responsive layouts, and production-ready architecture. Apps that look great, load fast, and do not break in production. 🔥 Firebase and Supabase Backend:- Firestore data modelling, Firebase Auth, Firebase Storage, Cloud Functions, real-time listeners, offline persistence, and push notifications via FCM. Supabase for relational backends, row-level security, real-time subscriptions, and Edge Functions. I have built backends that scale quietly and never surprise you. 🤖 AI-Powered Features:- OpenAI GPT-4o integrations, AI chatbots, image recognition, Whisper speech-to-text, voice assistants, smart recommendations, personalised feeds, AI search, and embeddings. I have shipped AI features across 50+ projects. Real intelligence, not buzzwords. 💳 Payments and Subscriptions:- Stripe, Stripe Connect, RevenueCat, Apple IAP, and Google Play Billing. Subscription paywalls, one-time purchases, marketplace split payments, escrow flows, and in-app purchase restore. I have implemented payments on 100+ projects and know every edge case. 🔌 Integrations I have shipped many times:- REST and GraphQL APIs, Node.js backends on Vercel, WebSocket and real-time socket integrations, Google and Apple sign-in, Auth0, OAuth 2.0, FCM push notifications, deep linking, Xano, Airtable, Twilio SMS, Google Maps, Mapbox, and third-party SDKs of all kinds. 🚀 App Store and Google Play:- Full submission, metadata, screenshots, compliance, and approval management for both stores. I handle the entire process so you do not have to learn App Store Connect or Play Console to ship your app. 🏆 Why 100+ founders have trusted me:- Top Rated Plus with a 100% Job Success Score. MVPs delivered in 4 to 8 weeks. Daily written updates and Loom walkthroughs so you always know where things stand. I challenge bad assumptions early so your budget does not get wasted later. I have never missed a milestone without telling you in advance. Long-term clients refer their friends because the work holds up. 🎯 I am the right fit if you are:- A startup founder building your first Flutter or FlutterFlow app and need it done right the first time. A product team adding AI features to an existing mobile app. A founder who has been burned by a previous developer and needs someone reliable to take over and ship. A business that needs Firebase or Supabase architecture designed properly before it causes problems at scale. 📩 Send me a message or invite me to your job. I respond within a few hours and I will tell you honestly whether I am the right fit before we start.

I’m an Expert Flutter Developer specializing in building high-quality, scalable, and performance-driven cross-platform mobile applications. With 55+ successful apps delivered, I have hands-on experience across industries including pharmaceuticals, ERP, CRM, logistics, education, and taxi-based solutions. I focus on creating robust Flutter applications developed from a single codebase and deployed seamlessly on both Android and iOS, ensuring speed, reliability, and long-term maintainability. 💡 What I Can Do for You 📱 Flutter App Development – High-performance, visually polished Android & iOS apps 🧠 State Management – Provider, Bloc, Riverpod, GetX 🔗 API & Third-Party Integrations – REST APIs, Firebase, payment gateways, Google Maps, social logins ⚡ Performance Optimization & Bug Fixing – Smooth, fast, production-ready applications 🎨 UI/UX Implementation – Pixel-perfect designs from Figma/XD 🚀 Deployment & Maintenance – Play Store & App Store publishing with ongoing support ✨ Why Clients Choose Me ✔️ Deep Flutter expertise with real-world production experience ✔️ Clean, modular, and scalable code architecture ✔️ Clear and transparent communication ✔️ Agile development with regular updates ✔️ On-time delivery with full ownership of the product 🚀 Let’s Build Something Amazing Whether you need a quick MVP, a full-scale Flutter application, or ongoing feature enhancements and maintenance, I’m here to deliver reliable, high-quality Flutter solutions that users love and businesses trust. 📩 Let’s connect and turn your idea into a powerful mobile app.

Hi there! I’m Vlad, a mobile and web developer with 13 years of professional experience and 10+ years delivering projects on Upwork. I help startups, agencies, and businesses turn ideas into production-ready applications. From MVPs to scaling existing products, I build clean user interfaces, reliable backend integrations, and maintainable codebases with clear communication throughout the project. 🛠️ My Core Skills: 📱 Flutter & Dart → Build cross-platform apps for iOS, Android, and Web from a shared codebase. ☁️ Firebase Ecosystem → Firebase Authentication, Cloud Firestore, Cloud Functions, Cloud Storage, and FCM push notifications. 🔗 APIs & Integrations → REST APIs, OAuth 2.0 authentication, and third-party service integrations. 💳 Payments & Monetization → Stripe, RevenueCat, PayPal, AdMob, and in-app purchases. ⚙️ Backend & Cloud → Firebase, Node.js/Express, and serverless architectures. 📰 CMS Integrations → Connect apps to WordPress and other CMS platforms via REST APIs. 🗺️ Location & Proximity Services → Implement Google Maps, GPS, geolocation, geofencing, and BLE beacon integrations for location-aware experiences. 🥽 Augmented Reality (AR) → Develop AR experiences in Flutter using plugins built on ARKit and ARCore. Contributor to open-source Flutter AR libraries. 💻 Frontend & Web Development → React, HTML, CSS, JavaScript, and Figma-to-code implementation. 💼 Trusted By: Startups, agencies, nonprofits, and businesses across 🇺🇸 USA, 🇮🇹 Italy, 🇦🇺 Australia, and beyond. 🚀 Why Clients Work With Me: ✅ I take ownership and think beyond the code. ✅ I communicate clearly and deliver consistently. ✅ I focus on practical, maintainable solutions. If you’re looking for a developer who combines technical expertise with reliability and clear communication, I’d be happy to discuss your project.