✅ Expert-Vetted by Upwork (Top 1%) ✅ 8+ years of Mobile App Development ✅ 20000+ Upwork hours | 86+ successful jobs ✅ 100% Job Success Score ✅ 91+ mobile & web projects delivered ✅ Flutter, React Native, Kotlin, Swift, UI/UX expert ✅ Proven impact: apps with millions of downloads & high ROI 👋 I'm a Senior Mobile Developer with over 8 years of experience helping startups and enterprises bring their app ideas to life. From iOS and Android to full-scale cross-platform solutions using Flutter and React Native — I deliver high-performance mobile applications designed to scale, engage users, and grow revenue. I've led teams of 15+ developers on enterprise-grade solutions and built MVPs for founders that went on to raise investment and scale to thousands of users. Whether you’re launching your first product or modernizing an existing one — I’ll help you make it real, robust, and ready for growth. 🧩 What I Can Do For You As a dedicated Mobile App Developer and Full Stack Solution Architect, I offer full-cycle development: —from idea & architecture, to scalable MVPs, intuitive UI/UX, app store deployment, and long-term support. 🛠 Tech Stack & Tools Mobile: React Native, Flutter, Swift, Kotlin, Java, Dart Frontend/Backend: TypeScript, Laravel, Firebase, Node.js, REST APIs DevOps: AWS, CI/CD pipelines, GitHub Actions, Docker, Terraform 3rd Party: Apple HealthKit, Stripe, ChatGPT API, WebRTC, PayPal, MQTT UI/UX: Figma, Adobe XD, custom UX audits & flows SDKs: iOS SDK, Android SDK, TensorFlow, AWS SDK, Custom A/B SDKs 📱 Apps I’ve Delivered Ride Instructor Booking App Social Media & Dating Platforms On-Demand Delivery Services Investment & Finance Mobile Solutions Learning Management Systems Grocery & Inventory Management VPN Wrappers, AI Assistants & Audio Bots eSIM marketplaces and E-bike IoT apps Custom Admin Panels and Secure Dashboards 🌍 Industries I Serve Healthcare & Wellness E-Commerce & Retail EdTech & LMS FinTech & Investor Platforms Travel & Booking Apps Sports, Fitness & Events Blockchain, NFT, AI/ML-based Apps Ecology, Waste & Recycling Smartwatch + IoT platforms Telecommunications (eSIM, VoIP, VPNs) 💡 Real Impact — Real Cases Migrated legacy NativeScript app to React Native with full redesign and story-based features (Felloz, Croatia). Created an MVP for a tarot reading platform with AI-driven magic ball chat, camera vision, and animated UX (Tarotoo, Ukraine). Developed a smartwatch-integrated app for a UK-based security firm using Apple Watch for distress signaling. Delivered GrowthBook SDK, CI/CD-integrated, with full UnitTest coverage and release to SPM/CocoaPods (Open-source, USA). Reworked CarPlay integration for a mobility platform: custom routing, filtering, and Apple Maps integration (UAE). 📊 Highlights ✔️ Built full-stack mobile platforms with React Native, Swift, Kotlin, Flutter + Nest.JS, Firebase, Node.JS ✔️ Integrated ChatGPT API & DALL·E into production apps ✔️ Custom SDK development: Swift, Kotlin, TensorFlow, AWS ✔️ Delivered apps with integrated CI/CD pipelines and Unit Tests ✔️ Designed UX/UI flows that won Dribbble Awards ✔️ Supported MVPs that secured funding and scaled globally ✔️ Created Web + Mobile ecosystems for clients in over 15 countries ✔️ Delivered multilingual, accessible, and ADA-compliant applications ✔️ 5.0★ satisfaction across long-term clients on Upwork & Clutch 🤝 Why Work With Me I’m not just a develope r— I’m your technical partner, working closely with you to bring clarity to the process, speed to delivery, and value to your users. I offer transparent communication, future-proof architecture, and measurable results. 📌 Let’s build something scalable and impactful together. Message me now to discuss your next big app. 🔗 Portfolio and project links available upon request. Let’s build something exceptional.

WordPress | Elementor | Elementor PRO | DIVI | ACF PRO | WooCommerce | Web Development | Web Design | Landing page | HTML | CSS | JS | Bootstrap | PHP | PSD to WordPress | Figma to WordPress | Yoast SEO | MailChimp Thank you for visiting my profile. I’ll do my best to make your project better! If you need a responsible landing page specialist, content marketing master or full stack wordpress developer, who can make a great, fast and beautiful website and will convert traffic into leads? Well, you’re actually on a right way and have already found it. Let me interest you! I’ve got over 10 years of experience in web development and web marketing. I know how to make a modern and responsive UX design of website, which will attract attention of users and create the purchase funnel for focused customers. I'M REALLY AN EXPERT WITH ELEMENTOR, ELEMENTOR PRO OR DIVI!!! For web development, front-end, back-end: I provide a valid and clean code, what gives an opportunity to make fastest websites. It is a very important if you plan to promote your Landing Page with Google advertising. I prefer to create unique and responsive design for Landing Pages or Single Pages by using HTML, CSS, JavaScript, Bootstrap and PHP. For online store or other multipage websites I prefer WORDPRESS and Woocommerce. Also I have an experience with Advanced Custom Fields Pro. My experience: - responsive layout - HTML5 - CSS3 - JavaScript - JQuery - Bootstrap 3+, 4+, 5+ - SVG - Photoshop - Logo design - Wordpress, Woocommerce, Tilda Publishing, Wix - WordPress Theme Development - DIVI or ELEMENTOR PAGE BUILDERS - ACF (Advanced Custom Fields Pro) - WordPress Performance Optimization (Google PageSpeed 2.0, Pingdom) - WordPress Custom Plugin Development - Hosting Set-Up, Configuration, Migration - SEO Optimization - SMM - Google Structured Data (Schema.org) - Meta & Alt Tags & Description If you have any questions, feel free to reach out. We can discuss any details by chat messages. Give me a job, and I will give you clients! *** Dear Clients! I live in Kharkiv, Ukraine and I really need a job and money to survive here. So if you have a job for me and you are willing to pay for it, I will gladly accept any offers.

Hello, I am a full-stack JavaScript developer with over 2 years of commercial experience in web development. I have worked in various domains, from healthcare to marketing. I have profound knowledge of React.js and Node.js and their most popular frameworks — Next.js and Nest.js, respectively. I have created applications from scratch and helped my clients deploy them using different services such as Vercel, AWS, GCP, and Heroku, as well as worked on existing projects with evolving codebases. My technologies of choice when developing full-stack applications are React.js, Nest.js, Prisma ORM, PostgreSQL, and Docker for comfortable development. When working on a project solo, I like to communicate with the client to achieve exactly what they have in mind, and when working in a team, I like to contribute as much as possible while improving myself and the working environment. My favorite part of being a web developer is learning new technologies and growing as a specialist.

Hi all, I’m a full-stack Node.js, React.js, Vue.js developer with over 6 years of experience in front-end and back-end development across various apps. I’m passionate about coding and strive to write clean, well-structured, and high-quality code, which I consider one of the most rewarding aspects of development. 🟩 🟩 🟩 🟩 My key fields of professional interest are FinTech and Real Estate. I am committed to developing sleek interfaces and business logic for projects related to Finance, Payment processing, and Property for rent and sale that require high-load systems with multiple user roles, complex platforms with back offices and dashboards, payments and purchases, exceptional antifraud and security, and third-party API integrations. Having completed a few projects as a Full-Stack Developer in these domains, I feel prepared to face new challenges and bring value to FinTech and Real Estate businesses worldwide. MY TECH STACK ✅ PROGRAMMING LANGUAGES: JavaScript, TypeScript, HTML5/CSS3, Python ✅ FRAMEWORKS & LIBRARIES: React.js, Redux, Redux Toolkit, Redux-Saga, Redux Reselect, Node.js, Nest.js, Express.js, Next.js, MUI, Vue3 (Composition API, Options API), VueX, Vuetify, Pinia ✅ DATABASES: PostgreSQL, MongoDB, Firebase ✅ PREPROCESSORS: Sass, SCSS ✅ TESTING TOOLS: Unit Testing, E2E Testing ✅ THIRD-PARTY APIs & LIBS: Instagram, Google API, Firebase ✅ OTHERS: REST API, AWS (EC2, Lambda, Cognito, EKS), Docker, Kubernetes, Linux, CI/CD, DigitalOcean, Heroku My superpowers are my passion for tech, clean code, and quality assurance and testing skills. Leveraging these strengths and my innovative mindset, I create state-of-the-art and flawless web applications or PWAs. Besides, it helps me quickly master new technologies, collaborate efficiently with distributed teams, and choose the best tech stack for every case. On top of that, my clients appreciate the hands-on and insightful perspective I bring to their projects, which was earned through my various track records working with large enterprises and small startups across the EU and US markets. PORTFOLIO ✅ A Real Estate Platform with 360° panorama views for the Australian market. Tech stack: React.js, Redux, Redux-Toolkit, Socket.io, Next.js, Three.js, Nx monorepo, Jest. ✅ A FinTech SaaS payment platform servicing businesses in various industries across 200 countries. Tech stack: JavaScript, Vue3 (Composition API), Pinia, TypeScript, Docker. ✅ A distinguished IT services provider, delivering exceptional solutions to small and medium-sized enterprises (SMEs) across continental Europe. I developed a PWA using React, Vue, Node, and SSR, SSG, and ISG applications utilizing Next.js. ✅ A prominent technology enterprise specializing in producing cutting-edge EV charging stations, and distributing them worldwide. Tech environment: React, Redux, Saga, Reselect, Node, Nest, Mongo, AWS. ✅ Websites development for a Real Estate company that provides apartment renovation services. Tech stack: JavaScript and PHP. 🟩 🟩 🟩 🟩 If you are looking for a reliable, creative and experienced tech professional, you have come to the right place—I'm excited about becoming your long-term partner! Let’s start working together! LANGUAGES I SPEAK Ukrainian is my native language. Besides, I have strong English skills. Most of my previous customers were English-speaking, so I am comfortable communicating in English. MY TEAM I am at ease as an individual contributor, but being a team player works best for me. So I joined Extrawest — an Upwork Top Rated Agency specializing in FinTech and Banking, Gambling and Betting, Food Ordering and Delivery, Logistics and Fleet Management, Medical Insurance and Healthcare, and special software for Electric Vehicles Charging Station networks since 2006. Having most of our resources based in Europe, we’ve been working with customers from over 20 countries (the US, Canada, Australia, most of the EU, South Africa, Singapore, Japan). Hence, it won’t be a problem for us to adjust to your timezone and working schedule. 🟩 🟩 🟩 🟩 My Agency Skills: Front-End (Frontend) Development, Back-End (Backend) Development, Full-Stack (Fullstack) Development, Mobile Development, EV Charging, Delivery, Food Ordering, FinTech, Banking, Loan, Mortgage, Wallet, Dashboard, Healthcare, Insurance, Betting, Gambling, Gaming, Flutter, Dart, JavaScript (JS), TypeScript (TS), Angular, Vue.js (VueJS, Vue), React.js (ReactJS, React), Node.js (NodeJS, Node), Java, Spring, SpringBoot, Hibernate, Python, Django, Scrapy, Quality Assurance (QA), Manual Testing, Automated Testing, UI/UX Design, Figma, Adobe Creative Cloud, DevOps, MySQL, PostgreSQL, MongoDB, Firebase, Docker, Amazon Web Services (AWS), Google Cloud Platform (GCP), Project Management (PM).

🔵 14+ years developing first-class web, mobile and AI apps that achieve business goals and hit the mark. As an AI developer and web developer, my expertise led my team to work with Fortune 500 companies such as Philip Morris, Coca-Cola, DANONE, McDonald’s (Ukraine), and Kimberly-Clark. I started as a programmer in 2006. Now, I'm CTO at Brights — a software company focused on web, mobile and AI products, with 120+ Mobile app developer s and Web developer s who specialize in AI Chatbot systems, advanced AI Integration solutions, AI Saas and Mobile app development. As a deal closer, I also work closely with clients during product strategy and delivery. At Brights, we support companies through every stage of development backed by experienced AI developer, AI Chatbot, AI API Integration, Mobile app developer, and web developer — from MVPs to scaling including AI developer | AI Chatbot | AI API Integration | Mobile app developer. Our experience includes API integration, complex API integrations, and enterprise-grade AI API Integration. Within the last 14 years, I have delivered 300+ projects across fintech, insurtech, healthcare, eCommerce, real estate, education, logistics, and more as an AI developer | AI Chatbot | AI API Integration | Mobile app developer. 👩‍💻 Technical stack I cover as an AI developer | AI Chatbot | AI API Integration | Mobile app developer: Front-end: • Vue.js, React, Angular, Next.js, Redux, react native Back-end: • ASP.NET, PHP, Node.js, GraphQL Mobile: • React Native, iOS, Android, with support from a dedicated Mobile app developer and Flutter developer as well as Mobile game developer Artificial Intelligence tech stack I cover as an AI developer | AI Chatbot | AI API Integration: • Python developer workflows, LangChain, GPT-4o, gpt-3, OpenCV, Hugging Face, RAG, LLM, AI machine learning, and scalable machine learning pipelines Data & Architecture: • PostgreSQL, MongoDB, Redis, Elasticsearch for both mobile app marketing and web • Supported by experienced data scientist and full stack developer teams Integrations: • Analytics, CMS, Swagger, botpress, chatbots, AI API, and automation systems with reliable API integration If you are looking for AI developer | AI Chatbot | AI API Integration or Mobile app developer with strong mobile app design experience (Figma mobile app) - drop me a line.

I’m a Full-Stack WordPress Developer with over 10 years of experience building fast, scalable, and user-focused websites that drive results. I specialize in developing high-quality 🚀 WooCommerce and WordPress solutions — from custom themes and plugins to seamless API integrations. Whether you need a conversion-optimized store, membership site, or multilingual platform, I can deliver tailored solutions with clean code and intuitive admin panels. My approach is plugin-light and performance-first. I focus on flexibility, SEO, maintainability, and ease of use — making sure your site runs smoothly for both users and editors. ✅ What I Deliver: Fully custom WordPress themes using ACF Pro, Elementor, or Sage/Roots Scalable WooCommerce stores with custom features and optimized checkout Unique and modern Webdesign Multilingual websites with WPML or Polylang Membership and subscription platforms API integrations (REST, Google Maps, Payment Gateways) Page speed optimization (Core Web Vitals ready) Clean, maintainable code that follows WordPress best practices 🧠 Tech Skills: Back-end: PHP, MySQL, REST API, Headless WP, Laravel Front-end: HTML5, CSS3 (BEM/SCSS), JavaScript/jQuery, React, Vue.js Tools: Git, Webpack, Figma, Adobe XD, Sketch Frameworks: Bootstrap, Grid/Flexbox, Tailwind, Builders: Elementor, Divi, WPBakery, JetEngine I work closely with designers, agencies, and startups as both a developer and a technical partner. My goal is not just to complete tasks — but to create meaningful, functional, and growth-oriented digital products. Let’s build something that works and grows with your business. 🔑 Keywords: WordPress Developer, WooCommerce Expert, Figma to WordPress, Custom WordPress Theme, ACF Pro, Elementor Developer, Divi Expert, JetEngine, WPML, Polylang, Multilingual Website, Membership Website, WordPress REST API, Google Maps Integration, WordPress Speed Optimization, Core Web Vitals, Custom Post Types, Custom WordPress Plugin, Sage Theme, Gulp, Webpack, Pixel Perfect HTML, WordPress Bug Fix, WooCommerce Custom Checkout, WordPress Maintenance, WordPress Support, WordPress Performance, API Integration, PHP Developer, CSS Grid, Flexbox, jQuery AJAX, SEO Optimization, Responsive Design, Mobile-First Design, UX/UI Development, Adobe XD, Sketch, WordPress for Agencies, Freelance WordPress Developer, Web Development Switzerland, E-commerce Website, Shopify Alternative, Custom CMS, Booking Website, B2B WordPress Site, Medical Website, Landing Page Development, WooCommerce Subscription, WordPress Freelance Partner, Statamic

⭐⭐⭐⭐⭐"Angle2 and its team have been invaluable in completing this critical feature. Their recommendations and guidance resulted in tremendous value for our end users." — 𝑀𝑎𝑡𝑡 𝐽𝑒𝑛𝑠𝑒𝑛, 𝐹𝑜𝑢𝑛𝑑𝑒𝑟, 𝐺𝑟𝑎𝑝ℎ𝑖𝑡𝑢𝑝 ⭐⭐⭐⭐⭐ "Communication was top-notch, he met all deadlines, and his skills were reasonably strong. I will likely have additional jobs for him in the future." — 𝐴𝑛𝑛𝑐𝑎𝑟𝑒𝑙 𝑆𝑎𝑛𝑐ℎ𝑖𝑎𝑏𝑎𝑟𝑐𝑎, 𝐶𝑜-𝐹𝑜𝑢𝑛𝑑𝑒𝑟, 𝐾-𝐿𝑎𝑏𝑠 I help product teams ship frontend that works - SaaS dashboards, eCommerce storefronts, startup MVPs, and component systems built to last beyond the first release. Clean, maintainable React and Next.js code that the next developer on your team can actually work With. 𝐖𝐡𝐲 𝐜𝐥𝐢𝐞𝐧𝐭𝐬 𝐜𝐡𝐨𝐨𝐬𝐞 𝐭𝐨 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡 𝐦𝐞 • Scope defined upfront - milestones, deliverables, and timeline agreed before a line of code is written • No black-box development - regular demos and updates at every stage • I step into existing codebases without breaking what works • Communication that doesn't require chasing - you always know where things stand • 30+ projects delivered across SaaS, eCommerce, and startup products Over 8 years I have shipped SaaS platforms, eCommerce frontends, admin dashboards, MVP products, and component libraries across fintech, retail, edtech, and enterprise software - on time, within scope, with clean documented code handed over at the end. 𝐖𝐡𝐚𝐭 𝐈 𝐛𝐮𝐢𝐥𝐝 ⚙️𝙎𝙖𝙖𝙎 & 𝘽2𝘽 𝙛𝙧𝙤𝙣𝙩𝙚𝙣𝙙𝙨 • Dashboards with real-time data, role-based views, and complex state management • Multi-step workflows, data tables, editors, and admin panels • Component libraries and design systems built with Storybook, shadcn/ui, Tailwind CSS • Production-grade refactoring of AI-prototyped or iteratively built codebases eCommerce & marketplace frontends • Storefront interfaces with performance-first architecture • Product pages, checkout flows, cart and inventory UI • Integration with Stripe, HubSpot, ActiveCampaign, and third-party APIs ⚙️𝙈𝙑𝙋 & 𝙨𝙩𝙖𝙧𝙩𝙪𝙥 𝙥𝙧𝙤𝙙𝙪𝙘𝙩𝙨 • React and Next.js applications from design to deployed • Figma to pixel-perfect implementation • Fast iteration without sacrificing code quality ⚙️𝙈𝙤𝙗𝙞𝙡𝙚 • React Native and Expo for cross-platform mobile applications 𝗦𝘁𝗮𝗰𝗸 • Frontend: React, Next.js, TypeScript, Vue, Nuxt.js, Tailwind CSS, shadcn/ui, Redux, Zustand • Backend integration: Supabase, PostgreSQL, REST APIs, GraphQL, Node.js • Auth & payments: Supabase Auth, Google OAuth, Stripe, JWT • Testing: Jest, React Testing Library, Vitest, Cypress • Deployment: Vercel, Netlify, AWS, GitHub Actions CI/CD • Mobile: React Native, Expo 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀 • SaaS frontend development - dashboards, workflows, admin tools • eCommerce frontend - storefronts, checkout, product UIs • MVP development - design to production in structured milestones • Codebase audit and refactor - production-grade hardening of existing frontends • Component library and design system setup • Figma to React / Next.js implementation • React Native mobile development • Third-party API and CMS integration My background is senior frontend development - 8 years building SaaS platforms, eCommerce frontends, and startup MVPs with React, Next.js, and TypeScript. I focus on projects where the UI needs to do real work - complex state, real-time data, role-based access, performance under load. The work I enjoy most is where frontend quality actually matters: a SaaS dashboard where users spend hours every day, an eCommerce storefront where load time affects conversion, a startup MVP where the first version needs to be good enough to grow from. Clean components, predictable delivery, and code that the next developer on your team can understand without a three-hour walkthrough. If you are building a SaaS product, an eCommerce platform, or a startup MVP and need a senior frontend developer who treats your deadline like his own - I would like to hear about it.

🤖 I design AI systems · Workflow Automation · cloud data platforms & reporting architecture for companies that need reliable operations instead of disconnected tools As an AI Solutions Architect I connect n8n · Make · Zapier · Microsoft Power Automate · OpenAI API · Claude API · Azure OpenAI · Python · REST API · Webhooks · databases · Snowflake · Azure Data Warehousing & Power BI My work combines three layers AI Automation Data Integration Cloud Architecture I help when a team has manual processes between CRM platforms · ClickUp · Airtable · HubSpot · Notion · Google Sheets · internal tools · databases · APIs & reporting systems I design the full path from business process to Workflow Automation to API Integration to Database Integration to AI Agent Development to Error Handling and Monitoring to Dashboard Automation Typical projects include ▪ AI Agent Development for internal operations · support · analytics · document processing · knowledge search & repetitive tasks ▪ n8n AI Agents connected to OpenAI API · Claude API · Azure OpenAI · LangChain · Supabase · REST API · Webhooks & company data ▪ RAG Systems · AI Chatbots · Conversational AI & company knowledge workflows ▪ AI Workflow Automation for approvals · notifications · enrichment · validation · routing · synchronization · reporting & human review ▪ Business Process Automation with n8n · Make · Zapier · Microsoft Power Automate · Google Apps Script & Python ▪ CRM Automation · ClickUp Automation · lead routing · task creation · pipeline updates · reminders & reporting ▪ API Integration · Third-Party Integration · Data Integration · Database Integration · REST API workflows & custom Webhooks ▪ ETL Automation · Data Extraction · Data Transformation · Scheduled Workflows · monitoring · recovery logic & documentation ▪ Power BI Automation · Dashboard Automation · Automated Reporting · KPI logic · Data Modeling & reporting-ready databases I do not choose a tool before understanding the process n8n supports flexible Workflow Automation · self-hosted systems · custom logic · AI Agent Development & complex API Integration Make supports fast business integrations · visual workflows · SaaS connections · CRM Automation & operational prototypes Python supports Workflow Automation that requires custom algorithms · advanced Data Transformation · scale · testing or deployment control Before development I define business rules · workflow states · data ownership · access permissions · human approvals · exception handling · monitoring · retries · audit logic · deployment structure & reporting requirements A strong AI solution needs trusted data · secure Database access · clear Solution Architecture · reliable API Integration · controlled Workflow Automation · monitoring · documentation & measurable business output My architecture background includes Azure Data Warehousing · Snowflake Database · Azure Data Factory · Azure DevOps · Databricks Platform · Microsoft Azure SQL Database · Microsoft SQL Server · ETL · Data Modeling · Business Intelligence & Microsoft Power BI For Azure projects I design Azure Cloud Architecture · Azure Data Warehousing · Azure Data Factory pipelines · Azure DevOps delivery · CI/CD · Terraform · Git · deployment control & Azure OpenAI integration For Snowflake projects I work with Snowflake Database architecture · Snowflake Data Warehousing · Data Integration · ETL Automation · dbt workflows · reporting layers · access logic · performance review · cost control & Power BI connectivity One enterprise Azure engagement included scalable multi-tenant architecture · strict data isolation · Azure Databricks processing · infrastructure cost reduction & multilingual Power BI reporting Another long-term engagement expanded from Power BI reporting into automated data validation · incremental refresh · data reliability improvements & third-party service integration I connect AI Automation to the data foundation I connect reporting to reliable ETL and Database Architecture I work across Automation Architecture · Solution Architecture · Cloud Architecture · Cloud Data Architecture · Database Architecture · AI Solution Architecture & AI Data Architecture If your AI Agent cannot access trusted company data I can design the Data Integration and Database Integration layer If your Workflow Automation fails without visibility I can add Error Handling and Monitoring · retries · alerts · audit logic & recovery workflows If your reporting depends on manual exports I can connect ETL Automation · Azure Data Warehousing · Snowflake Database · Power BI Automation & Automated Reporting If your prototype needs to become a production system I can define the Solution Architecture · security model · data flow · deployment process · monitoring structure & technical roadmap Send me your process · tools · data sources & expected outcome 🏆 Wait, you’ve actually made it to the very end! Mention "1 in 100" in your first DM and I will provide a discount😉

Do you need a website? Hello there! My name is Dmitry, and I'm a freelancer out of Ukraine who specializes in WordPress design/development with more than 10 years of experience. Since November 2015, I've been working as a freelancer on Upwork. As a freelancer, I have worked with a wide variety of large businesses, small businesses, and individuals, on projects including: - WordPress / WooCommerce development (my main specialty); - Figma / PSD / Sketch designs for a different scope of websites, from landing pages to the market website; - Low-code design and development; - Front-end development (HTML, CSS, JS, jQuery, React.js); - Agile/Scrum meeting; - Provide the best solution for my customers; Please view my reviews and portfolio for a brief introduction to my work! For my full portfolio or any questions you may have regarding your project, feel free to reach out to me via message, and I will get back to you as soon as possible! Thanks for your time, and I hope you have a pleasant experience here on Upwork! Please Note: Per-Hour/Fixed-Rate Fee is flexible to change based on availability, turnaround time needed, and project scope. ATTENTION I can provide a fixed-price quote ONLY for the project from scratch. Or Figma to WordPress conversion. NOT FOR FIXES. All fixes on existing projects that were not done by me should be covered in an hourly contract.

🤖 I build production AI systems - not API demos. I'm Dmitry, an AI Engineer with 10+ years of full-stack background. I help SaaS, crypto, and digital product companies ship AI features that work with real users - at scale, within token budgets, with proper fallbacks. The difference matters. Anyone can call the OpenAI API in a tutorial. The hard part is making AI features that don't break in production: conversation memory that persists, prompts that survive edge cases, streaming that handles network drops, and costs that don't spiral. That's what I do. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🎯 What clients hire me for ✅ Custom ChatGPT / GPT-4o / Claude integrations into existing apps ✅ RAG systems with vector search over business documents ✅ AI chatbots & assistants with persistent context (web + mobile) ✅ AI workflow automation (n8n + LLM for ops) ✅ Token cost optimization & prompt engineering ✅ Taking AI-built MVPs (Lovable, Cursor, Bolt) to production-grade ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📂 Recent production AI work 🔹 HOMI - Learning platform with ChatGPT-powered lesson generator Built GPT-4 integration into live LMS app with paying users. Custom prompts, streaming responses, conversation memory, ChatGPT-driven sample conversations, fallback handling. Live for 2+ years. $26K+ delivered across 4 contracts - same client kept coming back. 🔹 TapSwap - Gamified learning center for crypto exchange Built end-to-end LMS with 70 educational articles, 820 quiz questions, real-time leaderboard, reward redemption system. Angular + Firebase + custom gamification logic. 🔹 Style 220 - AR mobile app for VIMAR (Italian electrical products) Augmented reality "try-on" for switches and sockets in interior settings. iOS + Android, integrated with online store and order placement workflow. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🛠️ My technical stack AI: OpenAI (GPT-4o, GPT-4, DALL-E, Whisper), Claude API, LangChain Backend: Node.js, NestJS, Express, Firebase Cloud Functions Frontend: Angular, Ionic, TypeScript, RxJS, Tailwind CSS Mobile: Hybrid apps (Ionic + Capacitor) for iOS & Android Databases: Firestore, MongoDB, PostgreSQL Cloud: Firebase, GCP, AWS, Vercel, Cloudflare Automation: n8n, MakeCom, webhook orchestration ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🏢 Backed by WhyNet Agency I work with a senior team of 4 engineers + 1 PM under WhyNet - 8 years on Upwork, 100% Job Success, $500K+ delivered, 84 completed projects. This means: senior code review on every project, dedicated project manager keeping communication on track, additional engineering capacity when scope grows beyond what one developer should handle. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 💼 How I work → Async-first communication. No 5-call discovery loops before contract. → Structured PDF proposal within 24-48h after we discuss your project. → Weekly demos so you see real progress, not status reports. → Production-grade code with proper architecture, error handling, testing. → Direct and honest. If something won't work, I'll tell you before we start. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🎯 I work best with ✓ SaaS founders adding AI features to existing products ✓ Crypto / Web3 teams needing chatbots, RAG, or AI tooling ✓ EdTech companies building AI-assisted learning experiences ✓ Companies taking AI-generated MVPs to real production ✓ Teams replacing manual operations with n8n + LLM workflows ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✨ Ready to start? Send your project description - you get a structured proposal in 24-48h. Not a generic "let's hop on a call" template. - Dmitry · WhyNet CTO