𝗪𝗮𝗻𝘁 𝘁𝗼 𝗯𝘂𝗶𝗹𝗱 𝗮 𝗱𝗶𝗴𝗶𝘁𝗮𝗹 𝗽𝗿𝗼𝗱𝘂𝗰𝘁 𝗽𝗼𝘄𝗲𝗿𝗲𝗱 𝗯𝘆 𝗔𝗜? 𝗬𝗼𝘂’𝗿𝗲 𝗶𝗻 𝘁𝗵𝗲 𝗿𝗶𝗴𝗵𝘁 𝗽𝗹𝗮𝗰𝗲. Full-Stack Python & AI App Developer with strong expertise in back-end, front-end, and API integration. Experienced in building AI-powered web applications, SaaS platforms, and mobile solutions using Django, FastAPI, React, and OpenAI API. Projects span across industries from healthcare and education to fintech and non-profit, delivering measurable results through strategic product development, clean architecture, and seamless UX/UI design. Outside of work, I’m an animal lover, volunteer, and social good advocate, offering special support and discounts for projects with social impact. ⚡ Notable Projects 🧠 Zeno.PM — ERP & project management platform with ChatGPT-powered AI automation and dashboards. 🩺 AskSamie — Therapy web app integrated with Shopify API. Built with Python, Django REST Framework, React, FastAPI. 🙏 ChurchCopy.ai — GPT-3 communication app for churches, built in Bubble.io as an MVP. 💬 Sembly AI — AI meeting assistant for recording and summaries. 📊 Digital Ninja — Automation tool with data scraping, ETL pipelines, and OpenAI integration. 💻 SIMBA — AI-powered marketing analytics system with Bayesian modeling. 🎵 DropTrack — Music SaaS platform with automation and custom API integrations. Experienced in building, creating, and developing scalable AI-powered platforms, mobile apps, websites, and software solutions using Django, FastAPI, React, Flask, and OpenAI API. Projects span healthcare, education, fintech, and non-profit sectors, delivering measurable results through strategic product development, clean architecture, and user-friendly design. 🧩 Tech Expertise Programming Languages: Python, JavaScript, TypeScript, PHP, HTML, CSS, SQL Frameworks & Libraries: Django, Django REST Framework, FastAPI, Flask, React, React Native, Next.js, Node.js, Tailwind CSS, jQuery AI & Machine Learning: Artificial Intelligence (AI), Artifical Intelligence, Artificial Inteligence, Machine Learning, GPT-3, ChatGPT, OpenAI API, NLP, neural networks, AI chatbot development, AI software development, Generative AI, NLP Web Scraping & Data Engineering: Scrapy, Selenium, Splash, BeautifulSoup, Pandas, NumPy, ETL pipelines, Excel, data visualization, Data Scraping automation, web scraping app Backend & API Development: API Integration, REST API, GraphQL, OAuth, Socket, WebRTC, RPC, Zapier, Stripe API, PayPal API, EOS, payment gateway integration, API developer experience Frontend Development: UI/UX design, website and web app creation, interactive dashboards DevOps & Cloud: AWS, Google Cloud, Firebase, Docker, Kubernetes, CI/CD, Git Databases: PostgreSQL, MySQL, MongoDB, Redis, SQLite Testing & QA: Pytest, Cypress, Selenium, Puppeteer Experienced in full-stack / fullstack / full stack / front-end / frontend / front end / back-end / backend / back end software engineering and application development across web platforms, mobile systems, and AI-driven apps. Also skilled in MPPT automation, AWS deployment, and code review for scalable architectures. 🌍 Domains 📍 SaaS & B2B Platforms 📍 EdTech, E-Learning, LMS 📍 Non-profit & Social Impact 📍 Healthcare, Telehealth & Wellness 📍 CRM & ERP Systems 📍 Marketing & SEO Automation 📍 AI-driven FinTech & Analytics 📍 Marketplaces, E-commerce & Listing Apps 📍 Media, Music & Social Platforms 📍 Custom Websites & Automation Tools 🧱 Project Types ✅ MVP, prototype, and clickable product design (Figma prototyping, Bubble MVP, startup MVP, SaaS MVP development) ✅ Full-stack web and mobile app development ✅ AI-powered app creation and chatbot software build ✅ Workflow automation and data scraping tools ✅ SaaS platform design and engineering ✅ REST API development and integration ✅ Payment system implementation (Stripe, PayPal, EOS) ✅ WordPress & CMS website development ✅ Web scraping bots, crawlers, and automation systems ✅ Business intelligence dashboards 🚀 Approach Focus on creating, building, and engineering value-oriented digital products from lightweight MVPs to full enterprise systems. Combining AI technologies, modern UI/UX design, and solid software development to deliver scalable, maintainable, and smart products. Let’s build, create, and develop each app, platform, or website that is crafted to simplify complexity, automate workflows, and empower users through Artificial Intelligence. 🤝 Collaboration 🏆 Startups and Entrepreneurs (MVP & SaaS prototyping) 🏆 SMBs & SMEs (process automation, web apps, website creation) 🏆 Enterprises (AI-powered platforms, API integrations, business systems) 🏆 Non-profits and Educational organizations (social impact tech) Let’s bring intelligence to your product from idea to launch. Open to collaboration on AI solutions, web apps, mobile apps, platforms, or any digital innovation. Ready to get started? Let’s discuss your vision.

🚀 Shipping Product-Grade Automation and Document Platforms I build full-stack automation and AI-assisted products that live inside real workflows, not side projects. My focus is on shipping reliable, installable systems on top of platforms professionals already use, especially Google Docs, Google Workspace, browser extensions, and API-driven backends. I regularly take working MVPs built with automation or scripting and turn them into production-ready products with clean UX, predictable behavior, and commercial viability. 📄 Google Apps Script & Google Docs Products I develop and harden Google Docs-based products using Google Apps Script, custom sidebars, and document-bound logic. This includes improving reliability, handling authorization and quota edge cases, managing collaborative document state, and designing interfaces that feel native and professional. I focus on making Apps Script solutions resilient, maintainable, and suitable for legal, executive, and compliance-driven environments. 🧩 Chrome Extensions & In-Workflow Tooling I build Chrome extensions using Vanilla JS, TypeScript, React, and Manifest V3. My work includes document overlays, automation helpers, AI-assisted sidebars, and extensions that integrate tightly with Google Docs, web apps, and backend APIs. I emphasize stability, permissions correctness, and UX that fits naturally into existing workflows. ⚙️ Full-Stack Automation & API Development I design end-to-end systems using JavaScript, TypeScript, Python, and modern APIs. This includes webhook-driven workflows, scheduling engines, entitlement or licensing checks, and backend services that support document tools and extensions without becoming brittle or over-engineered. 🤖 AI Automation & Agent Workflows I work with OpenAI, Anthropic, Gemini, LangChain, LlamaIndex, and function-calling pipelines to build AI-assisted document tooling, automation agents, and structured data processing systems. My approach is pragmatic: AI is used where it adds value and clarity, not as a novelty layer. 🔐 Productisation, Security, and Reliability I routinely handle installation flows, versioning strategies, lightweight licensing logic, and security-aware design. I think in terms of failure modes, auditability, and trust, especially when products are evaluated by lawyers, CFOs, and senior stakeholders. 📦 Cloud & Deployment I deploy systems to AWS, GCP, Azure, and serverless environments using Docker and cloud-native services. I focus on predictable deployments, observability, and cost-aware scaling. 🌟 Let’s Ship Something Professionals Can Trust If you’re building a serious automation or document-centric product and need someone who understands both the technical constraints and the commercial reality, I’m ready to help you ship.

Top Rated Mobile & Full-Stack Developer with 10+ years of experience, 100% Job Success, and 20+ mobile apps delivered for iOS and Android. I help startups, founders, and product teams build production-ready mobile apps, full-stack platforms, and AI-powered products using Flutter, React Native, Kotlin, React, Python, Node.js, and modern AI APIs. My main focus is mobile development. I build fast, scalable, user-friendly apps for iOS and Android, from MVPs to complex production systems. I can also handle the backend, web dashboard, API integrations, and AI features needed to make the product complete. ⭐️I can help you with⭐️ - Flutter app development for iOS and Android - React Native mobile app development - Kotlin Android development - Mobile MVP development from scratch - Figma to mobile app implementation - React web apps and admin dashboards - Backend APIs with Python and Node.js - REST / GraphQL API integrations - AI assistants, chatbots, and AI-powered app features, AI-agents - OpenAI / ChatGPT, Claude, Gemini API integration - Push notifications, maps, payments, chat, and real-time features - Bug fixing, refactoring, performance optimization, and app release support ⭐️Key experience⭐️ - 10+ years in software development - 20+ mobile apps delivered - 10+ Flutter apps built from scratch - 5+ React Native apps delivered - 10+ AI-powered applications built - 100,000+ installs on Google Play for one delivered product - MVP delivery experience in 2-5 weeks ⭐️Core tech stack⭐️ - Mobile: Flutter, Dart, React Native, Kotlin, Swift - Frontend: React, Next.js, JavaScript, TypeScript, Tailwind - Backend: Python, Node.js, Express, Firebase, PostgreSQL, MongoDB, MySQL - AI: OpenAI API, ChatGPT API, Google AI, Azure AI, Claude, AI assistants, AI-Agents - Tools: Git, Docker, AWS, DigitalOcean, Figma, Jira, Trello I have worked on products in fintech, e-commerce, health tech, education, logistics, productivity, content creation, and AI-powered applications. Clients usually hire me when they need someone who can take ownership of the mobile app, understand the business goal, communicate clearly, and also support the backend or AI side when needed. If you need a reliable developer to build a mobile app, improve an existing product, or add AI features to your platform, I would be happy to discuss your project.

Full stack developer with 10 years of experience | top 1% on Upwork ( Expert-Vetted ) I turn ideas into real applications your users can depend on Recent work: → Product Architect at Upwork, leading a team of 100+ engineers within Upwork's Engineering Talent Cloud → Led frontend for Autobound's AI sales automation platform - grew from a single-engineer startup to $4M raised and millions in revenue (Vue.js/Nuxt + Chrome extension + micro-frontends) → Built full stack for Augmento's AR/VR product - used by 1,000+ brands and 100K users across retail and real estate → Migrated DriverHRIS - 1,000+ screens from Vue 2/.NET to Vue 3 + Node.js microservices, with a 10x (1,000%) performance gain → Rebuilt Wawibox (German dental marketplace) - full Nuxt 2 → Nuxt 3 SSR → Nuxt 4 migration, 80% faster load time I also co-founded Softonix, a 25-engineer Vue.js | Node agency in Lviv - so if your project grows past one developer, I can scale the team without handing you off to strangers. Want to scope something? Let's talk - I usually reply within a hour 🚀 Keywords web developer, react developer, wordpress developer, mobile app developer, SQL, Software Design, Application Improvement, Software Development, Software Debugging, CSS, Software Consultation, Git, HTML, Back-End Development Framework, Full-Stack Development, Database Architecture, Agile Software Development, Node.js, Laravel, Bootstrap, Web Application, WordPress, Tailwind CSS, Python, MySQL, Shopify, PHP, JavaScript, Web Design, Desktop Application, Software Testing, API, jQuery, Vue.js, CSS 3, Standalone Application, React, HTML5, Software Architecture & Design, Angular, API Integration, Front-End Development Framework, Adobe Photoshop, React Native, blockchain developer, MongoDB, full-stack web developer, mern stack developer, ios app, php developer, game developer, Graphic Design, full stack developer, c#, front end developer, full stack web developer, front end web developer, web developer wordpress, web app developer, shopify web developer, Web Development, Responsive Design, WooCommerce, Cross Browser & Device Compatibility, Website, Website Security, Website Migration, Website Backup, react native developer, python developer, full stack react developer, react developers ethiopia, react js developer, react web developer, Front-End Development, React Bootstrap, TypeScript, Redux, wordpress website, shopify developer, seo, WordPress Customization, WordPress Plugin, bbPress, WordPress Backup, WordPress Installation, WordPress Optimization, Elementor, WordPress Development, WordPress Security, WordPress Migration, WordPress Bug Fix, WordPress Theme, WordPress SEO Plugin, flutter developer, Mobile App Development, Native App Development, Mobile App Design, App Development, Social Media Account Integration, Android App Development, Mobile App, Swift, Kotlin, iOS Development, Java, Mobile App Improvement, User Profile Creation, Mobile App Testing, Hybrid App Development, Flutter, Smartphone, Mobile App Bug Fix, Android, Mobile App Redesign I am not a mobile app developer but I have such capacity in my team. I am full stack developer and software architect with 10 years of experience and highest posible AI adoption expertise. I am web developer fullstack Software developer Test section: Next.js, GitHub, OpenAI Codex, Code Review, Cursor, SEO Performance, Affiliate Marketing, Affiliate Marketing Website Vercel, Strapi, Amazon API, CMS, Analytics, Conversion Optimization, Recommendation Engine, Prompt Engineering, Fractional CTO, Technical Product Manager, Startup Tech Lead AI Agent Development, AI Development, Amazon Web Services Postgres, AWS, OpenAI API, Claude API, LLM, AI Agent, Anomaly Detection, Document Parsing, Enterprise UI, Manufacturing, B2B, Salesforce, Vue 3 , React,

Hello 👏 I am a highly experienced software developer proficient in blockchain, smart contract development, Web3 technologies, full-stack engineering, AI integration, and system administration, delivering robust and innovative solutions across diverse technological landscapes. 🏆 Build and deploy blockchain applications Leverage my expertise in blockchain development to create secure, decentralized applications tailored to your specific requirements. Whether it's building a custom blockchain solution or integrating blockchain technology into your existing systems, I can guide you through the entire process. 🏆 Develop smart contracts Utilize my blockchain knowledge to design and deploy smart contracts that automate and enforce trust in your business processes. From NFT, cryptocurrency to decentralized finance protocols, I can assist you in creating robust and secure smart contracts. 🏆 Implement DeFi solutions I can assist you in developing DeFi platforms, liquidity pools, yield farming mechanisms, and other cutting-edge financial solutions, helping you tap into the vast potential of the blockchain ecosystem. 🏆 Build beautiful and modernistic website I specialize in creating stunning, modern, responsible websites that seamlessly blend aesthetics with functionality. 🏆 Integrate AI with applications I have expertise in integrating artificial intelligence into applications, enhancing their capabilities by leveraging advanced machine learning algorithms to deliver smarter, more responsive solutions. 🏆 Do server administration and issue tracking I possess extensive experience in server administration, encompassing system maintenance, troubleshooting, and performance optimization, coupled with a proven track record of effectively managing and resolving issues through robust tracking and reporting methodologies. 🛠 Tech Stack: - React, Next.js - Solidity, Hardhat, Truffle - TypeScript, JavaScript (ES - Latest) - Ethers.js, Web3.js, Wagmi, UseDapp - MySQL, PostgreSQL, MongoDB - Node.js, Express, Nest.js, Svelte - C/C++, Qt, Python - PHP, Laravel, WordPress - Golang, Gin, Fiber - Rust - Prisma - Apache, Nginx, IIS - REST, GraphQL - AWS - Docker - CI/CD - Web Scraping - Testing (Chai/Mocha/Jest/Selenium) - LLMs - ChatGPT integration - Fine-Tuning - Prompt Engineering - Analysis for improvement - Linux Server Administration - Web Hosting/Migration - Web Security - DevOps ...

Senior full-stack engineer (12+ yrs) and fractional CTO. I've shipped a healthcare SaaS used by millions, a loyalty platform that helped raise $5M, and cut one client's infra bill by 80%. I specialize in React.js, Next.js, Node.js, AWS, GCP, and AI-powered SaaS development, including advanced integrations with OpenAI, Anthropic, MCP servers, and modern agentic coding workflows. GPT-5 is now widely used in products like Cursor, Windsurf, GitHub Copilot, and Codex for agentic coding, while OpenAI Codex itself has evolved into a parallel agent workspace for cloud-based development. I actively use modern vibe coding and AI development tools such as Cursor, Cursor Composer, Windsurf Editor, OpenAI Codex, Claude Code, v0, Bolt, Lovable, Replit, GitHub Copilot, Devin, Tabnine, Qodo, Windsurf, Trae, and other AI-first builders to speed up delivery, reduce repetitive work, and improve code quality. Cursor has introduced Composer and a multi-agent interface, Windsurf positions itself as an AI-native IDE, and Claude Code now supports agent teams that can work in parallel on codebase tasks. I work with advanced models including GPT-5, Claude Sonnet 4.6, Claude Opus 4.6, and coding-optimized model workflows for architecture, debugging, refactoring, feature delivery, code review, and product acceleration. Claude Sonnet 4.6 is positioned by Anthropic as a major upgrade for coding, long-context reasoning, and agent planning, and Windsurf has also added fast coding-focused OpenAI model support. Achievements: 🎖️ Built an HRM loyalty platform that raised $5M 🚀 Developed a healthcare SaaS platform serving millions of users ✂️ Reduced infrastructure costs for a client by 80% 👨‍💻 My skill set: Frontend: React.js, Next.js, Remix, TypeScript, Redux, MobX, GraphQL, Apollo Client, MUI, Ant Design, SSR, SSG, Medusa.js Backend: Node.js, NestJS, Express, Firebase, AWS Amplify, MongoDB, PostgreSQL, MySQL, Redis, TypeORM, Hasura DevOps / Cloud: AWS, GCP, DigitalOcean, Vercel, Firebase, EC2, ECS, Kubernetes, CI/CD pipelines, self-hosted infrastructure Headless CMS: Contentful, Strapi, Sanity AI / Architecture / Performance: OpenAI, ChatGPT, Codex, Anthropic Claude, MCP servers, AI agent workflows, page speed optimization, Lighthouse, PageSpeed Insights, Python, Django, RabbitMQ, Kafka, Redis, microservices, micro-frontends, and database optimization 🧑 Shortly about me: • 12+ years of web development experience • 5+ years in team leadership and management roles • Strong product thinking from MVP and POC to scalable production systems • Deep experience improving existing products, architecture, security, performance, and revenue outcomes • Passion for building clean, efficient, visually polished interfaces and robust backend systems Key strengths: 💪 Strong expertise in Next.js, React.js, NestJS, and modern full stack architecture 💪 Hands-on experience with AI-assisted and agentic development workflows 💪 Excellent communication, ownership, and business understanding 💪 Ability to move fast with modern AI tools while keeping code maintainable 💪 Flexible, proactive, and focused on practical results 💪 Constantly learning and adopting the newest high-impact tools and workflows 📩🚀 Ready to elevate your project with modern full stack engineering and AI-accelerated development? Send me a direct message or invite me to your project, and let’s build something exceptional together.

✅ 10+ 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 💼 39+ 𝗝𝗼𝗯𝘀 𝗖𝗼𝗺𝗽𝗹𝗲𝘁𝗲𝗱 ✅ 100% 𝗖𝘂𝘀𝘁𝗼𝗺𝗲𝗿 𝗦𝗮𝘁𝗶𝘀𝗳𝗮𝗰𝘁𝗶𝗼𝗻 I am a full stack web developer with over 10 years of experience, specializing in business automation, PHP, and Python development. I create custom sites, develop custom plugins, build WooCommerce add-ons, and handle custom API integrations and automation. My extensive experience and proven track record make me a valuable asset to any project. In addition to my expertise in PHP and JS, I am proficient in Python, focusing on LLM, RAG models, computer vision, business automation, and data parsing. My skills extend to Vue.js, and Node.js, providing a comprehensive solution for diverse web development needs. Key Highlights of My Services: Pixel-Perfect Theme Development: Tailored to align with design nuances. Custom WordPress Theme Design: Capturing the essence of your brand. Customized WordPress Plugins: Enhancing site functionality. Responsive WordPress Design: Ensuring seamless cross-device viewing. Python Expertise: Specializing in LLM RAG models, computer vision, business automation, and data parsing. Advanced Web Solutions: Expertise in Vue.js, and Node.js frameworks. API Development and Integration: With WooCommerce, Shopify, or any Node.js application. I leverage top-tier tools like JetBrains IDEA, VS Code, and VIM, and maintain strict version control with GitHub and GitLab. By adhering to agile methodologies, I ensure timely, efficient, and high-quality project delivery. My portfolio showcases versatility and depth, including WooCommerce marketplaces, LMS systems, intricate medical portals, and cryptocurrency platforms. Open communication, daily updates, and a commitment to understanding and executing client feedback are central to my work ethic. I champion agile methodologies and believe in proactive, transparent communication. With me, you directly communicate with the expert—no middlemen, no ambiguities. If you're seeking a seasoned developer who combines technical prowess with an impeccable track record, let's embark on your next web journey together. Best Regards, Ihor Niezhynskyi

⭐️𝐒𝐞𝐧𝐢𝐨𝐫 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐝𝐞𝐯 𝐰𝐡𝐨 𝐰𝐫𝐢𝐭𝐞𝐬 𝐜𝐨𝐝𝐞 𝐲𝐨𝐮𝐫 𝐟𝐮𝐭𝐮𝐫𝐞 𝐭𝐞𝐚𝐦 𝐰𝐨𝐧'𝐭 𝐜𝐮𝐫𝐬𝐞. 💡 130+ production-grade products delivered (SaaS, MVPs, AI systems, marketplaces) 💰 $16.5M+ revenue generated by client products 👥 157K+ active users powered by systems I built ⚡ 1M+ API requests/month at 99.9% uptime 🚀 MVP → production in 2–6 weeks, architected to scale from day one 🔥 WHAT I DO You're building a SaaS, MVP, or AI-powered product. You need a Full Stack Developer who can own React frontend and Node.js backend end-to-end, ship in weeks (not quarters), and write code your future team won't throw away. That's what I do. Early-Stage MVP, Productionizing a prototype, Scaling a Live SaaS Platform, or Legacy Codebase rebuild - I've built this on React, Next.js, Node.js, TypeScript, Supabase, PostgreSQL, AWS over 10+ years. 🔥 ROLES I TAKE ON (10+ YEARS EXPERIENCE) ✔ Full Stack Developer / Full Stack Engineer — 40+ end-to-end SaaS platforms (React + Node.js), 10+ years ✔ Frontend Developer / Front-End Developer — 30+ production UI builds, 10+ years ✔ React Developer / React.js / ReactJS Developer — scalable React apps since 2015, 10+ years ✔ Node.js / NodeJS Developer / Backend Developer — 25+ APIs, 1M+ req/month, 10+ years ✔ Vue.js Developer / Nuxt.js Developer — 8+ Vue projects, 8+ years ✔ Next.js Developer / NextJS Developer — 15+ SSR/SSG SaaS platforms, 7+ years ✔ TypeScript Developer / JavaScript Developer — 50+ typed and untyped JS codebases, 10+ years ✔ SaaS Developer / Web Application Developer / Web App Developer — MVP to scale, 10+ years ✔ Lead Frontend Engineer / Senior Full Stack Engineer — team leadership on 18+ projects 🔥 INDUSTRIES I SERVE ⚖️ For LegalTech founders — 6+ Case Management Systems, Document Workflows, Client Portals, Compliance SaaS 🏥 For Healthcare & MedTech — 8+ Patient Platforms, Telehealth, HIPAA-Compliant data, Clinic Management SaaS 📦 For Logistics & supply chain — 5+ Logistics Platforms, real-time tracking (sea/air/truck), Project44, INTTRA, EDI 🛒 For Marketplace & e-commerce — 15+ Multi-Vendor Marketplaces, B2B & Two-Sided Marketplace, Stripe, bidding, complex search 🤖 For AI startups — 12+ AI-Powered products: OpenAI / Claude API / LLM, RAG Chatbots, AI Agent Platforms, vector DBs, FastAPI, browser extensions 📝 For No-code & enterprise SaaS — 10+ Form Builders, Admin Dashboards, Internal Tools, Microservices, Multi-tenant 🌐 For Media, AdTech & publishing — 6+ Publisher Platforms, CMS, payment gateways, Analytics Dashboards 🏠 For Real estate & PropTech — Property Listings, Bidding & Auction systems, Agent Dashboards 💰 For FinTech founders — Stripe Connect, subscription billing, multi-currency, KYC, Fintech MVP 📚 For EdTech — course delivery, student dashboards, progress tracking, live sessions 🔥 RESULTS I DELIVER ✔ MVP → production in 2–6 weeks, 35% fewer bugs, 5–8 weeks shorter delivery cycle ✔ Frontend: LCP under 1.5s, Lighthouse 90+, bundle reduced 40%, 18–27% engagement uplift ✔ Backend: 1M+ API requests/month, 99.9% uptime, 40–60% lower latency ✔ Database: 3–5x faster response, 70% less DB load; 90% faster workflows, 65% fewer back-office actions ✔ +30% conversion on React / Next.js apps; 15–22% better marketplace lead quality ✔ 15,000+ shipment operations/month, 2,423+ completed orders, 30,000+ healthcare users ✔ 20+ SaaS MVPs launched, 47% fewer bugs in legacy modernization 🔥 HOW I WORK I think like a product engineer, not a code-monkey. Before writing a line, I align on the business outcome — who the user is, what they pay for, where the product needs to be in 6 months. Then I ship in weekly demos and stay available on Slack / Telegram for fast turnaround. Typical cycle: 1️⃣ Discovery & scoping (2–3 days) — define MVP boundary 2️⃣ Architecture — clean foundations, scalable schema, right stack 3️⃣ Weekly sprints with demos — progress every week 4️⃣ Production launch — CI/CD, monitoring, error tracking 5️⃣ Post-launch support — most clients keep me on 🔥 TECH STACK Frontend: React.js, ReactJS, React Hooks, Next.js, NextJS, Vue.js, Nuxt.js, TypeScript, Redux, Zustand, Tailwind CSS, shadcn/ui Backend: Node.js, NodeJS, Express.js, NestJS, Python, FastAPI, REST, GraphQL, WebSockets Database: PostgreSQL, Supabase, MongoDB, MySQL, Redis, Prisma Supabase: Auth, Row-Level Security, Edge Functions, Realtime, Storage AWS: Lambda, S3, RDS, EC2, CloudFront, API Gateway, SQS, SNS, Cognito, ECS Other cloud: Firebase, Vercel, Netlify, Cloudflare AI / ML: OpenAI API, Claude API, LangChain, RAG, RAG Chatbot, AI Agent, pgvector, Computer Vision Payments: Stripe Subscriptions, Stripe Connect, Stripe Checkout, Stripe Billing, PayPal Integrations: Twilio, SendGrid, Resend, Slack API, Telegram Bot API, EDI, Project44, Mobile: React Native, React Native Expo, iOS / Android DevOps: Docker, GitHub Actions, CI/CD, Sentry 🚀 Building a SaaS, MVP, marketplace, or AI-powered product? Click "Invite" or "Hire" and send the brief.

Only complex projects, no fixed-price based contracts. ⭐️⭐️⭐️⭐️⭐️ "Anybody who gets the opportunity to work with Nazar will be not only satisfied but thrilled. He's humble, smart, capable. Definitely hire again." Hey — what are you working on? Maybe I can help 🙂 I usually jump in at different stages of a project: 🚀 Build products from scratch (idea → flows → UI → full dev) 🛠 Upgrade / refactor existing systems ⚙️ DevOps, server setup & scaling 🕸 Scraping, data extraction & pipelines 💳 Payment integrations (Stripe, PayPal, etc.) 🔗 API integrations (Google APIs, third-party services) …and more depending on what you need About me: I have 20 years of experience building: ✔ Websites (custom or CMS-based) ✔ Web apps & SaaS platforms ✔ Data-driven systems I’ve worked across fintech, healthcare, retail, logistics, edtech, and more. Typical projects: ✔ CRM / ERP systems ✔ AI-powered platforms ✔ Data & analytics tools ✔ Web & mobile apps ✔ IoT solutions ✔ Legacy system upgrades AI stuff I do (real-world, not just demos): 🤖 AI chatbots & AI agents (support, internal tools, automation) 🧠 RAG pipelines (connect LLMs to docs, DBs, APIs) 📊 Predictive analytics (forecasting, anomaly detection) 🔍 Semantic search & vector DBs 🗣 Speech AI (STT, TTS, voice agents) 👁 Computer Vision ⚙️ AI automation workflows (multi-step agents, business processes) 🧪 Fine-tuning, evaluation & MLOps pipelines Tech stack.. Backend: - Python (Django, Flask, FastAPI, Tornado) - Node.js (MEAN / MERN stacks) - PHP (Laravel, CodeIgniter, CakePHP) Frontend: - React, Angular, Vue - HTML5, CSS3, JS (jQuery, AJAX, etc.) - Responsive, mobile-friendly, cross-browser layouts - Bootstrap, Tachyons Data & DBs: - PostgreSQL, MySQL, MongoDB - Data pipelines, transfer, processing Other: - REST APIs, third-party integrations - Payment systems (Stripe, PayPal, Braintree, etc.) - Scrapy + custom scraping solutions - Cloud (AWS/GCP), deployment, infra --------------- If you’ve got an idea (or something half-built and messy), I can help you figure out how to actually ship it without over engineering. Happy to jump on a quick 30-min call, understand your goals, and map out next steps. Just ping me 👍 -------------- Python, Django, mysql, Postgres, flask, fast api, ai chatbot, scrapy, data extraction, data scraping AI Chatbot, AI Agent Development, AI App development, Chatbot Development, Generative AI, MLOps, Artificial Intelligence, Machine Learning, AI Development, AI Bot --------------- Node.js, Express.js, NestJS, Next.js, TypeScript, JavaScript, MongoDB, PostgreSQL, MySQL, GraphQL, REST API, Prisma, Sequelize, Redis, WebSockets, Socket, API Integration, Microservices, Serverless, AWS Lambda, Docker Backend Development, Full-Stack Development, API Development, Real-time Applications, Microservices Architecture, Cloud Development, Scalable Systems, SaaS Development, Web App Development, System Design

I help founders to build SaaS, MVP and grow from 0 to first $10k MRR and more. Also I develop Chrome Extensions, Adobe UXP, CEP extentions, AI agents, site scraping tools, integrate with Stripe using TypeScript, JavaScript, NodeJs, React, AWS Playwright and PHP For the healthcare and fintech domain I use Java, Spring Boot I am 13 years in a code. I am Ukrainian I have my own IT products (SaaS, mobile app and Chrome Extension) I know how to built software fast and be prepared for x10 scale I don't care about the money, though it is an important part of it. If I don't like you idea/product I won't do it Below is for Upwork search engine: ✅ (Domains): Logistics, Mobility, Travel, IT Security, Banking, HealthCare, RealEstate, CRM, LMS, EdTech, Automation ✅ (Backend) - JavaScript, TypeScript, NodeJs, Express, Nest, Java, Spring Boot, Spring MVC, Spring Data Jpa, Spring Data Quarkus, Mongo, Python, Django, Flask, Spring Security, Hibernate, Quartz API, Jersey, Jackson, Gson, Swagger, Http, Https, SOAP, REST, ActiveMQ, AWS EC2, AWS ECS, AWS S3, AWS Cognito, Lambda, SQS, Aurora, Event Bus, Cloudformation, Firebase, Tomcat, Glassfish, Jboss, Wildfly, Payara, Ant, Maven, PostgreSQL, MySQL, h2, Netsize, Datalex, Keycloak, Camunda, Kafka, Kubernetes, Docker, Docker Compose, Protobuf, gRPC, Chat GPT, Stripe, PayPal, Apple Pay, Google Play, ✅ (Something non-standard): DrawIO customization, Thales, Gemalto integration, Adobe Illustrator Extension, Jira Plugin, Confluence Plugin, Chrome Extension, Telegram Chatbot, WhatsApp Chatbot, Facebook Chatbot, Browser Automation Studio (BAS), RAG, Retrieval Augmented Generation, Adobe Developer, CEP Developer, UXP Developer, Photoshop Scripts, Photoshop Actions, PSJS, NIFI Apache Dashboard, Cursor IDE, lovable, create.xyz, Shopify Store, shopify developer ✅ (Frontend): HTML/CSS, JavaScript, JQuery, ReactJS, Vue JS, D3.js, npm, webpack, babel. plasmo