🏆 AI Reliability Architect for AI-Native Productivity & SaaS 📱 Flutter AI Systems (iOS • Android • Web) 🧠 Persistent Memory & RAG Engineering ⚙️ LLM Orchestration & AI Infrastructure Design ✅ Free AI System Audit Consultation AI productivity apps don’t fail because of the UI. They fail because memory breaks. Context disappears. AI outputs become inconsistent. Mobile latency kills retention. Founders bring me in when their AI-native app works beautifully in a demo, but becomes unreliable in real-world usage. Where AI Productivity Apps Break If you're building: • Voice-to-task AI apps • AI workflow automation tools • Mobile AI agents • Enterprise AI productivity platforms And facing: • Context retention failures • Weak vector retrieval accuracy • LLM hallucination or inconsistent outputs • Slow AI responses on mobile • Sync conflicts across devices • Governance & compliance concerns That’s rarely just a model issue. It’s an architecture issue. What I Actually Build I combine 5+ years of enterprise Flutter architecture ($100k+ earned on Upwork) with production-grade AI engineering. I architect AI-native productivity systems using the right stack, not just random API glue. 📱 Frontend (Mobile & Cross-Platform) • Flutter (Clean Architecture, SOLID, MVVM) • Riverpod / Bloc for state management • WebSockets / real-time sync • Offline-first design • Performance tuning for low-latency AI UX 🧠 LLM & AI API Orchestration • OpenAI API (GPT-4o, embeddings), Anthropic Claude, Google Gemini • Function calling & tool usage pipelines • Structured output enforcement (JSON schema validation) • Deterministic response layering & Guardrails to reduce hallucination 📚 RAG & Vector Systems • Pinecone, Weaviate, Supabase Vector, PostgreSQL + pgvector • Custom embedding pipelines • Retrieval tuning (chunking strategy, re-ranking, hybrid search) 🗂 Persistent Memory Architecture • Session memory + long-term memory layers • Structured memory graphs & Event-based memory storage • Context summarization pipelines • Cross-device state synchronization ☁️ Backend & Infrastructure • Firebase (Auth, Firestore, Functions) & Supabase • Node.js / Python microservices • REST & GraphQL APIs • Multi-tenant architecture & RBAC for enterprise The Goal: AI Reliability When AI is inconsistent: Users churn. Workflows break. Enterprise deals stall. When AI becomes stable, contextual, and fast: Retention increases. Daily active usage scales. My focus is measurable retention uplift through stable memory systems, retrieval accuracy, deterministic LLM orchestration, and low-latency Flutter UX. This is AI reliability engineering, not surface-level integration. Who I Work With • Seed to Series B AI productivity startups • B2B SaaS founders building AI-native workflows • Enterprise-focused automation platforms (Note: I do not take on generic, brochure-style mobile app builds. I partner with serious product teams solving retention and reliability at scale.) Authority & Track Record • $100,000+ earned on Upwork building scalable mobile systems • Technical founder-level thinking • Proven production AI systems shipped ✌️ SOUND LIKE A FIT? NEXT STEPS: If your AI productivity app feels unstable, inconsistent, or slow—let’s fix the foundation. Message me with: Your product Your current AI stack The reliability issues you're facing I’ll tell you exactly what’s breaking, and how we stabilize it.

If you’re looking to hire a Flutter mobile app developer, I build production-ready iOS and Android apps using Flutter, Dart, and FlutterFlow, from MVPs to scalable platforms powered by Firebase. I have 3+ years of experience in mobile app development, delivering cross-platform apps across healthcare, ERP, SaaS, and social platforms, with a strong focus on clean architecture, performance, and intuitive UI/UX. Mobile App Development Expertise I work as a Flutter app developer who combines custom Flutter & Dart coding with FlutterFlow when speed and flexibility are required. This approach helps you: Launch MVPs faster Extend Apps beyond no-code limitations Build scalable mobile applications without rewrites What I Can Build for You Mobile app development for iOS and Android Cross-platform apps using Flutter Startup MVPs & internal business tools Firebase-powered real-time applications Admin dashboards & custom workflows Core Technologies Flutter & Dart – cross-platform mobile app development FlutterFlow – rapid app development with extensibility Firebase – Auth, Firestore, Storage, Cloud Functions Figma – UI/UX design, wireframes, prototyping REST APIs & third-party integrations Industries I’ve Worked In Healthcare & Wellness ERP & SaaS platforms Social & Community apps Education & internal business tools How I Work Understand your app idea and business goals Choose Flutter or FlutterFlow based on scalability needs Design user-friendly interfaces with Figma Build, test, and refine your mobile application Support launch and post-release improvements If you need a reliable Flutter developer for mobile app development who understands both custom code and no-code, communicates clearly, and delivers scalable results, let’s discuss your project.

Mobile App Development | Custom AI Development | LLM and RAG implementation | Web Development I help startups, agencies, and enterprises build scalable digital products — from MVP to full-scale platforms — with a strong focus on performance, security, and long-term growth. With 15+ years of experience and a Top Rated Plus track record, I don’t just develop apps — I act as a technical partner, helping you make the right product and architecture decisions that save time, cost, and future headaches. 💼 What I Specialize In 📱 Mobile Applications (iOS, Android, Cross-Platform) Flutter, React Native, Swift, Kotlin High-performance, scalable app architecture Real-time features (chat, streaming, live updates) MVP to enterprise-grade applications 🌐 Web & SaaS Platforms React.js, Next.js, Node.js, NestJS, Laravel SaaS products, dashboards, admin panels API-first architecture & third-party integrations High-conversion, performance-optimized systems 🤖 AI / ML Integration OpenAI / ChatGPT integrations into web & mobile apps Predictive analytics & intelligent automation AI-powered dashboards, assistants & workflows Cloud deployment (AWS, Azure, GCP) ⚙️ Technical Strengths Scalable backend architecture (microservices, APIs) Cloud infrastructure & database optimization Payment systems (Stripe, PayPal, Razorpay) Real-time systems (WebSockets, Firebase) Security-first development approach 🧠 What Sets Me Apart ✔ Thinks like a product owner, not just a developer ✔ Focus on ROI, scalability, and clean architecture ✔ Clear communication & structured delivery process ✔ Experience working with non-technical founders & agencies ✔ Long-term support, optimization, and growth strategy 📈 Proven Experience Across SaaS & subscription platforms Fintech & financial dashboards On-demand & marketplace apps AI-powered applications Enterprise & startup ecosystems 🤝 Engagement Approach I work best with clients looking for: A reliable long-term technical partner Clean, scalable builds (not quick fixes) Clear timelines, accountability, and quality 📩 Let’s Build Something Scalable If you're serious about building a high-quality product that scales, let’s connect. I’m happy to review your idea, suggest the right architecture, and define a clear roadmap before we begin.

Your startup deserves a developer who's launched startups — not just coded for them. In 6 years of full-stack Flutter development, I've served as Tech Lead on 3 startup launches, delivered 100+ apps across iOS, Android, and Web, and helped founders go from idea to live product — fast, clean, and built to scale. I work best with founders and product teams who need more than a coder. They need someone who understands MVPs, tight timelines, technical debt, and what "production-ready" actually means. Here's what that looks like in practice: clients come back. Three of my top reviews on this profile are from the same company — because when I deliver, I become their go-to developer. What I build: cross-platform Flutter apps, SaaS platforms, AI-integrated mobile products, Shopify-to-app conversions, and complex backend systems using Firebase, Supabase, and Node.js. What you get: clean architecture, clear communication, and a developer who treats your product like it's his own. Top Rated on Upwork | $30K+ earned | 30+ completed projects Ready to build? Send me a message and let's talk about your project. I offer a free 30-minute technical consultation — no strings attached.

Flutter and React developer with 6,500+ hours on Upwork and a 100% Job Success Score — building cross-platform mobile apps, full-stack web applications, and AI-powered products for startups and product companies since 2017. I build iOS and Android apps with Flutter and Dart, full-stack web platforms with React.js (Upwork certified), Node.js, Express, and MongoDB, and cross-platform mobile apps with React Native. On the backend I work with REST APIs, GraphQL, Firebase, AWS, and PostgreSQL. I also build AI-powered features into web and mobile applications — integrating OpenAI, Gemini, and Claude APIs into Flutter and React apps, building custom chatbots and AI assistants, automating workflows with LLM backends, and connecting AI services to Node.js APIs. If your product needs an intelligent layer on top of existing functionality, that's a natural extension of the stack I already work in. For early-stage startups, I specialise in MVP development — scoping, architecting, and shipping a working product fast without cutting corners on code quality. Most of my clients are founders or technical leads who need a senior developer they can trust to own the build end-to-end. What you get working with me: — Clean, scalable architecture from day one, not retrofitted later — Daily updates and async-friendly communication across timezones — On-time delivery, verified across 93 completed projects — A technical partner who thinks about your product, not just the ticket Outside Upwork, I'm Founder and CTO of Fortmindz — a 70-person product engineering company with 850+ projects delivered, ISO 9001:2015 certified, and award-winning (Nasscom, ET Now, ET Entrepreneur, BCC&I). I was also recognised by Prime Minister Narendra Modi for winning a global cybersecurity hackathon. If you're building a Flutter app, a React or MERN web platform, an AI-powered product, or need a senior developer to take your MVP from idea to launch — I'm available. Message me and let's talk scope.

☀️ 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲𝗱 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 | 𝗘𝘅𝗽𝗲𝗿𝘁 𝘄𝗶𝘁𝗵 𝗣𝗿𝗼𝘃𝗲𝗻 𝗠𝗮𝘀𝘁𝗲𝗿𝘆 ☀️ ✅ 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 🏆𝐅𝐫𝐞𝐞𝐥𝐚𝐧𝐜𝐞𝐫 ✅ 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐢𝐧𝐠 𝐄𝐱𝐜𝐞𝐥𝐥𝐞𝐧𝐜𝐞 🌟| 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 ✅ 𝟓.𝟎𝟎 ★★★★★ 𝐂𝐥𝐢𝐞𝐧𝐭 𝐑𝐞𝐯𝐢𝐞𝐰𝐬 ✅ 𝟗𝟓% 𝐉𝐨𝐛 𝐒𝐮𝐜𝐜𝐞𝐬𝐬 𝐑𝐚𝐭𝐞 ✅ 𝟏𝟎𝟎% 𝐂𝐥𝐢𝐞𝐧𝐭 𝐄𝐧𝐝𝐨𝐫𝐬𝐞𝐦𝐞𝐧𝐭𝐬 ✅ 𝐓𝐫𝐮𝐬𝐭𝐞𝐝 𝐟𝐨𝐫 𝐄𝐱𝐜𝐞𝐩𝐭𝐢𝐨𝐧𝐚𝐥, 𝐇𝐢𝐠𝐡-𝐐𝐮𝐚𝐥𝐢𝐭𝐲 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐚𝐛𝐥𝐞𝐬 𝐎𝐯𝐞𝐫𝐯𝐢𝐞𝐰: Since 2015, working as a MERN Stack developer with expertise in MongoDB, Express, and Node.js, as well as React for MERN projects. With a strong background in developing custom MERN Stack websites, portals, and web applications, I excel at building innovative, tailored, and scalable solutions. My experience includes delivering robust, feature-rich, and modular applications that meet specific client needs and provide a seamless user experience. I have developed several apps targeting different verticals like events, fitness, healthcare, fintech. lifestyle, navigation, on-demand, service provider, video/photo editing, AR, VR, utility, entertainment, dating, social networking, social media, and news. 🙋‍♂️ 𝐌𝐲 𝐂𝐨𝐫𝐞 𝐒𝐤𝐢𝐥𝐥𝐬 𝐚𝐧𝐝 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞: 👉 𝐌𝐲 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐒𝐤𝐢𝐥𝐥𝐬: 💎 Nodejs - JavaScript runtime for backend 💎 Expressjs - Web app framework for Node 💎 Nestjs - Framework for Node with TypeScript 💎 Nextjs - Framework for universal React apps 👉 𝐌𝐲 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 𝐒𝐤𝐢𝐥𝐥𝐬: 💎 React - Library for building UIs 💎 TypeScript - Typed superset of JavaScript 💎 Lovable/Supabase 👉 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬: 💎 MongoDB - NoSQL database 💎 PostgreSQL - Object-relational SQL database 💎 MySQL - Object-relational SQL database 💎 DynamoDB - NoSQL database service 👉 𝐔𝐈 𝐋𝐢𝐛𝐫𝐚𝐫𝐢𝐞𝐬: 💎 Tailwind CSS - Utility-first CSS framework 💎 Material UI - React components library 💎 Ant Design - React components library 💎 Chakra UI - Modular React UI components 𝐒𝐭𝐚𝐭𝐞 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭 𝐚𝐧𝐝 𝐀𝐮𝐭𝐡𝐞𝐧𝐭𝐢𝐜𝐚𝐭𝐢𝐨𝐧: 💎 Redux/Redux-Thunk - Centralized state management 💎 React Context API - Internal state management 💎 NgRx - State management for Angular 💎 Auth0 - Authentication as a service 👉 𝐅𝐨𝐫𝐦𝐬 𝐚𝐧𝐝 𝐕𝐚𝐥𝐢𝐝𝐚𝐭𝐢𝐨𝐧: 💎 React Hook Form - Forms library 💎 Formik - Forms library 💎 Yup - Form validation 👉 𝐑𝐞𝐚𝐥-𝐭𝐢𝐦𝐞 𝐂𝐨𝐦𝐦𝐮𝐧𝐢𝐜𝐚𝐭𝐢𝐨𝐧 𝐚𝐧𝐝 𝐌𝐞𝐬𝐬𝐚𝐠𝐢𝐧𝐠: 💎 GraphQL - Query language for APIs 💎 Socketio - Realtime communication 💎 MQTT - Lightweight messaging protocol 👉 𝐃𝐚𝐭𝐚 𝐆𝐫𝐢𝐝𝐬 𝐚𝐧𝐝 𝐕𝐢𝐬𝐮𝐚𝐥𝐢𝐳𝐚𝐭𝐢𝐨𝐧: 💎 Ag-Grid - Data grid component 💎 Chart.js - Charting library 💎 ApexCharts - Charting library 👉 𝐃𝐚𝐭𝐚 𝐇𝐚𝐧𝐝𝐥𝐢𝐧𝐠 𝐚𝐧𝐝 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬: 💎 TypeORM - ORM for SQL/NoSQL databases 💎 Redis - In-memory data store 👉 𝐃𝐞𝐬𝐢𝐠𝐧 𝐓𝐨𝐨𝐥𝐬: 💎 Figma - Prototyping tool 💎 Adobe XD - Prototyping tool 👉 𝐌𝐨𝐛𝐢𝐥𝐞 𝐀𝐩𝐩𝐬 💎 Expertise in mobile development with React-Native and Flutter 💎 Design and development of iOS and Android mobile apps using Firebase, Hybrid Apps, and TypeScript. 👉 𝐃𝐞𝐯𝐎𝐩𝐬 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 💎 Docker & Containerization 💎 AWS (EC2, S3, Lambda, Cognito, CloudWatch) 💎 Vercel, Netlify, Heroku, Railway, Render 💎 CI/CD Pipelines (GitHub Actions, GitLab CI/CD, Jenkins) 💎 NGINX & Apache Server Configuration 💎 Version Control with Git & GitHub/GitLab/Bitbucket 💎 Shell Scripting, SSH, FTP/SFTP Management 💎 Deployment Automation & Monitoring Tools. I follow Agile development methodology (Scrum) adhere to constant clear client communication to ensure transparency to stakeholders, easy adaptability to changing requirements, predictable delivery and costs and a high-quality final product. I’m focused on the success of the application and believe in long term relationships. I believe that the more we communicate, the better job I can do for you therefore looking forward to hearing from you and working for you soon.

Hi, I’m Oleg, a senior developer specializing in mobile apps, web applications, and full-stack solutions. I’ve delivered 50+ projects for startups, medium businesses, and large enterprises, combining clean architecture, AI integration, and cloud scalability to create reliable, production-ready applications. Whether you need a high-performance iOS or Android app, a cross-platform mobile solution, or a full-stack web + backend system, I can design and build it from end-to-end. I also integrate AI features, automate testing, and optimize performance for scalable results. Core Expertise:     •    iOS & Android Development     •    Cross-Platform Mobile Development (Flutter, React Native, Xamarin/.NET MAUI)     •    Mobile APIs & Backend Integration     •    Full-Stack Web & Backend Development (Node.js, Python, .NET, React, Angular)     •    AI Integration & Prompt Engineering     •    Mobile Automated Testing & QA Automation     •    Cloud Solutions & Microsoft Azure     •    Clean Architecture & Scalable, Production-Ready Code I don’t just build apps — I deliver complete systems that are reliable, maintainable, and aligned with your business goals. Feel free to send a message so we can discuss your project, milestones, and timelines, and structure it to work best for your needs. Looking forward to connecting.

If you're seeking a highly skilled and experienced Mobile App and Web Developer, I'm here to meet your needs. I have been working in the industry since 2018. Throughout my career, I have successfully built numerous applications across various industries, including medical, government, business, entertainment, education, and more. I am dedicated to transforming your ideas into functional apps and websites. My ultimate goal is to provide efficient, professional, and friendly service. 𝗪𝗵𝘆 𝗰𝗵𝗼𝗼𝘀𝗲 𝗺𝗲? ✅ Deliver on Time ✅ Exceptional UI/UX Design ✅ Effective Communication ✅ 100% Client Satisfaction I am highly proficient in a wide range of programming languages and frameworks, including, 🔸Flutter 🔸Kotlin 🔸Java 🔸React 🔸NodeJS 🔸ExpressJS 🔸Python This versatility enables me to choose the most appropriate technology stack for your project, ensuring optimal performance and scalability. Don't hesitate to reach out and drop me a message. I am always available for a discussion to understand your requirements better. Together, we can bring your vision to life.

10+ years experience. I build products that are easy for users to understand. I work quickly, as I believe most progress is made during iteration, after user/client feedback. By choosing me as your developer, your project will get done sooner than you think. I pride myself in being an extraordinarily fast developer while still maintaining high-quality standards.

Building software is rarely just about writing code. Whether you’re validating a new idea, launching an MVP, scaling an existing platform, or adding AI capabilities to your product, the goal is the same: creating software that delivers real value to your users and your business. For the past 10+ years, I’ve partnered with founders, startups, and growing companies to design, build, and scale web applications, mobile apps, SaaS platforms, and AI-powered products. I’ve worked across the full product lifecycle from early planning and architecture to development, launch, and long-term growth. As a Top Rated Plus Upwork professional, I bring a combination of technical expertise, product thinking, and business awareness to every engagement. I enjoy working closely with clients to solve problems, simplify complexity, and build reliable software that can scale with their business. 𝗛𝗢𝗪 𝗜 𝗛𝗘𝗟𝗣 𝗖𝗟𝗜𝗘𝗡𝗧𝗦 • SaaS Products & Subscription Platforms • AI-Powered Applications & Automation Solutions • Customer Portals & Business Applications • Mobile Applications for iOS & Android • CRM, ERP & Internal Business Systems • Marketplaces & Multi-Sided Platforms • Real-Time Communication Applications • Analytics & Data-Driven Platforms 𝗔𝗜 & 𝗔𝗨𝗧𝗢𝗠𝗔𝗧𝗜𝗢𝗡 • OpenAI, Claude & LLM-Based Integrations • AI Assistants & Chat Experiences • Workflow Automation & Business Process Optimization • Document Intelligence & Structured Data Extraction • Recommendation & Personalization Features • AI Search & Knowledge Platforms • AI-Powered Features for Existing Products 𝗔𝗣𝗣𝗟𝗜𝗖𝗔𝗧𝗜𝗢𝗡 𝗔𝗥𝗖𝗛𝗜𝗧𝗘𝗖𝗧𝗨𝗥𝗘 & 𝗘𝗡𝗚𝗜𝗡𝗘𝗘𝗥𝗜𝗡𝗚 • Scalable Application Architecture • REST & GraphQL APIs • Authentication & Permission Systems • Multi-Tenant SaaS Platforms • Subscription, Billing & Payment Systems • Real-Time Features & Event-Driven Workflows • Database Design & Performance Optimization • Cloud Infrastructure & Deployment Automation 𝗪𝗘𝗕 & 𝗠𝗢𝗕𝗜𝗟𝗘 𝗦𝗢𝗟𝗨𝗧𝗜𝗢𝗡𝗦 • Modern Responsive Web Applications • Cross-Platform Mobile Development • Real-Time Data Synchronization • Push Notifications & Messaging Systems • Offline Support & Secure Data Storage • App Store & Play Store Deployment • Payment Gateway & Third-Party Integrations 𝗪𝗛𝗬 𝗖𝗟𝗜𝗘𝗡𝗧𝗦 𝗣𝗔𝗥𝗧𝗡𝗘𝗥 𝗪𝗜𝗧𝗛 𝗠𝗘 • 10+ years of professional software development experience • 32,000+ Upwork hours across long-term client engagements • Strong understanding of both technology and business goals • Clear communication and proactive collaboration • Clean, scalable, maintainable solutions • Reliable long-term technical partnership 𝗧𝗘𝗖𝗛𝗡𝗢𝗟𝗢𝗚𝗜𝗘𝗦 Frontend: React.js, Next.js, TypeScript, JavaScript, Tailwind CSS Backend: Node.js, NestJS, Express.js, Python (FastAPI, Django), PHP (Laravel) Mobile: React Native, Expo Databases: PostgreSQL, MongoDB, MySQL, DynamoDB Cloud & DevOps: AWS, Docker, CI/CD, GitHub Actions, Vercel AI & Integrations: OpenAI, Claude, Stripe, Twilio, Firebase, Third-Party APIs 𝗜𝗡𝗗𝗨𝗦𝗧𝗥𝗜𝗘𝗦 SaaS • AI • FinTech • Healthcare • EdTech • Marketplaces • CRM • ERP • Real Estate • E-commerce • Enterprise Software If you’re looking for a technical partner who can help plan, build, and scale your software product while maintaining a strong focus on business outcomes, I’d be happy to discuss your project and explore how I can help.