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"Need an engineer who can turn an idea into a polished mobile and web product without costly rewrites? I'm Yevhen, a Mobile App Developer & Frontend Developer with 6+ years of experience in React Native and 15+ production-ready digital projects. I build mobile apps, web frontends, and cross-platform products from idea to launch. My focus is faster delivery, pixel-perfect UI, and scalability. 💻 What I build as a Mobile App Developer | Frontend Developer 15+ mobile apps, MVPs, dashboards and frontend solutions. 6+ years designing scalable mobile and web interfaces. 30-60% less manual work through reusable component systems and automation. 2 platforms covered with React Native and Expo: iOS and Android. 3 product layers managed: mobile, frontend, architecture. 4 stages covered: planning, development, launch, scaling. I work as a mobile app developer with React Native, Expo, TypeScript, React, Next.js, Redux, Tailwind CSS and Styled Components. For Expo product, I provide mobile app developer expertise with OTA updates and EAS build. For React systems, I work as a frontend developer using component architecture and state management. I can also join as a web developer, mobile developer, frontend developer, or React Native engineer. 📱 Mobile app development I create React Native applications for iOS and Android from a single codebase. Each mobile app can include navigation, offline support, push notifications, and API integration. ✔️ 15+ apps shipped - React Native and Expo for iOS and Android ✔️ 2 platforms from 1 codebase - Cross-platform mobile development ✔️ 100% pixel-perfect UI - Figma to React Native component translation ✔️ OTA updates - Expo Application Services for instant deployments ✔️ Offline-first architecture - Local storage and sync strategies ✔️ Push notifications - Firebase Cloud Messaging and APNs ✔️ Native module integration - Camera, geolocation, biometrics, BLE ✔️ Deep linking & navigation - React Navigation and URL-based routing ✔️ App Store & Google Play - Full release and review process ✔️ 60+ FPS animations - Reanimated and gesture-based interactions ✔️ Accessibility - Screen reader support and WCAG-compliant components As a mobile app developer, I build workflows that connect APIs, handle authentication, and deliver smooth user experiences across devices. A second mobile layer can integrate native features when required. My React Native pipelines adapt when platform updates change. 🎨 Frontend, UI/UX. Web development As a Frontend Developer, I build responsive web applications, dashboards, and design systems. I can work as a Frontend Developer specialist, connecting interfaces, state management, API layers, and component libraries through React and Next.js. For data-heavy systems, I apply performance optimization methods and coordinate with a designer when needed. I assess whether TypeScript techniques are justified or simpler logic is safer. I also support mobile-first responsive workflows involving layouts, animations, and accessibility. ⚙️ Core stack and approach ✔️React Native, Expo, TypeScript, JavaScript, React, Next.js, Redux Toolkit ✔️REST API, GraphQL, Firebase, AsyncStorage, SQLite, and EAS deployment ✔️Payment gateway integration, authentication, third-party APIs and mobile automation ✔️Architecture, coding, testing, documentation and production support I can begin as an it consultant, clarify the scope, then continue as the Mobile App Developer responsible for implementation. Depending on the system, I may work as a mobile app developer, provide frontend developer delivery, or take ownership as a Frontend Developer during restructuring and scaling. For legacy environments involving older React codebaKeywords: Full-stack developer, Web development, Mobile app development, API development, Backend development, Frontend development, SaaS development, Startup development, MVP development, Product development, System architecture, Platform development, Next.js developer, React developer, JavaScript, TypeScript, HTML5, CSS3, Responsive design, React Native developer, Expo, Cross-platform apps, iOS development, Android development, Python developer, FastAPI, Django, Flask, REST APIs, Automation engineer, Process automation, Business automation, Workflow automation, ETL pipelines, Data processing, Web scraping, Scrapy, Selenium, Playwright, AI integration, ChatGPT integration, Analytics dashboards, Admin dashboards, Internal tools, CRM systems, Performance optimization, Scalability, Cloud-ready systems, CI/CD, Digital platforms, AI-powered applications, Responsive web design, Web app development, Landing page development, Python automation, Data scraping, Cross-platform mobile apps, Mobile UI development, Python Backend Developer, RestAPI, Rest API, Fast API, PostgreSQL, SQL, Postgres, Scrapping, Data Extraction, Bots, Scripts, React.js, ReactJS, React Js, NextJS, Next Js, Full Stack, FullStack, ReactNative, Mobile App, LLM, RAG, AI Agent, LangChain, Data Pipeline, bot.

Are you looking for a 𝗙𝘂𝗹𝗹-𝗦𝘁𝗮𝗰𝗸 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 who actually gets things done? I'm Artem. I've been building web products for years — React, Next.js, Node.js, TypeScript — the full picture, frontend to backend. Not "I touched React once" kind of experience. Real production systems, real users, real scale. I built and scaled Yumzi.app to 10,000+ restaurants. That kind of thing. 𝗛𝗼𝘄 𝗜 𝗮𝗰𝘁𝘂𝗮𝗹𝗹𝘆 𝘄𝗼𝗿𝗸: I don't wait around for someone to explain every detail. I jump into the codebase, understand the architecture, ask the right questions, and start moving. If something in the project doesn't make sense technically — I'll tell you honestly instead of just building it the wrong way. I care about the product, not just the ticket. So if I notice something broken or a better approach while working on your project — I'll bring it up. That's just how I operate. 𝗪𝗵𝗮𝘁 𝗜 𝘄𝗼𝗿𝗸 𝘄𝗶𝘁𝗵: 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱: React, Next.js (App Router), TypeScript, Tailwind CSS, Shadcn/ui, Framer Motion, Redux, Zustand 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗮𝗻𝗱 𝗗𝗮𝘁𝗮: Node.js, NestJS, Prisma, PostgreSQL, Supabase, Firebase, REST/GraphQL 𝗔𝗜 𝗮𝗻𝗱 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀: OpenAI API, Claude, Grok, Stripe, DLocal, Twilio, SendGrid 𝗧𝗼𝗼𝗹𝘀: Git, Vercel, Docker, Figma to code I'm open to both — long-term product work where I become a core part of your team, or shorter engagements like MVPs, new features, or performance problems nobody else wants to debug. Send me a message, let's talk about your project.

🅼🅾🆂🆃 🅷🅴🅰🅻🆃🅷🅲🅰🆁🅴 🅰🅿🅿🆂 🅵🅰🅸🅻 🅵🅾🆁 🅱🅾🆁🅸🅽🅶 🆁🅴🅰🆂🅾🅽🆂. Someone builds the patient portal fast, then finds out six months later that the audit logging was never really there, or that the EHR integration only works when the data is clean. I have been cleaning up that kind of thing for five years, and building it properly from the start for about as long. I am a full stack developer and I work on web and mobile both. I have shipped 15+ apps and 10+ of them were in healthcare, including patient portals, provider dashboards, telehealth, scheduling and secure messaging. A few of them are still running today with thousands of people using them every week. 𝑯𝒆𝒓𝒆 𝒂𝒓𝒆 𝒕𝒘𝒐 𝒆𝒙𝒂𝒎𝒑𝒍𝒆𝒔 𝒐𝒇 𝒕𝒉𝒆 𝒌𝒊𝒏𝒅 𝒐𝒇 𝒘𝒐𝒓𝒌 𝑰 𝒅𝒐. - Last year I built a patient portal for a clinic group that was still running everything on paper and spreadsheets. The hard part was not the portal, it was migrating eleven years of patient records into a clean database without losing anything or exposing it along the way. We went live with about 18,000 patient accounts and their front desk calls dropped by roughly half in the first two months. - Another client came to me with a scheduling platform that a previous developer had left half finished. The Epic integration was the problem, because it worked in testing but broke constantly with real appointment data. I rewrote the integration layer, added proper error handling and audit logging, and got them launched in seven weeks. They are still on it and have added two more clinics since. Almost every client I talk to now wants AI in the product somewhere. Clinical note summarizing, intake chatbots, symptom triage, document extraction, search across patient history. I build these, but I build them carefully. Patient data does not go to a model provider without a BAA in place, and where it can be de-identified first, it is. Most of the AI healthcare projects I see go wrong for that reason rather than a technical one, and it is a much cheaper problem to solve at the design stage than after launch. ✌𝓦𝓱𝓪𝓽 𝓘 𝔀𝓸𝓻𝓴 𝔀𝓲𝓽𝓱:✌ 𝐅𝐫𝐨𝐧𝐭 𝐞𝐧𝐝: React, Next.js, TypeScript, JavaScript, Tailwind 𝐁𝐚𝐜𝐤 𝐞𝐧𝐝: Node.js, Express, NestJS, Python, Django, REST APIs 𝐌𝐨𝐛𝐢𝐥𝐞: React Native, Flutter, iOS and Android, App Store and Play Store submission 𝐀𝐈: OpenAI and Claude APIs, RAG pipelines, LangChain, chatbots and voice agents, document parsing and summarizing, prompt design and evaluation 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞: PostgreSQL, MongoDB, Firebase, Redis 𝐂𝐥𝐨𝐮𝐝 𝐚𝐧𝐝 𝐃𝐞𝐯𝐎𝐩𝐬: AWS, Docker, CI CD, Vercel 𝐇𝐞𝐚𝐥𝐭𝐡𝐜𝐚𝐫𝐞: HIPAA, HL7, FHIR, EHR integrations with Epic and Cerner, encrypted patient data, audit logging, role based access 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬: Stripe, Twilio, video calling SDKs, OpenAI and Claude APIs ⌛On timelines, a working MVP usually lands in four to eight weeks, covering login, records, scheduling, messaging and payments. It is fast because I have built these same pieces many times, not because I skip steps. Healthcare is the wrong place to skip steps. 💪🏻𝓗𝓸𝔀 𝓘 𝔀𝓸𝓻𝓴 𝓲𝓼 𝓼𝓲𝓶𝓹𝓵𝓮.💪🏻 You get a scope and a timeline before I write anything, then updates as I go, and something you can actually click on every week. I keep hours that overlap with yours. The code is documented, so if you bring on an in house team later they can pick it up without hating me. I am free to start now, around [30 to 40] hours a week. If you are building something in healthcare, tell me a bit about it and I will give you a real answer on scope, cost and timeline. If it is not a fit, I will say so.

Frontend Developer with 4.5+ years of experience in the Healthcare industry, specializing in React. Proven expertise in modernizing complex legacy systems through strategic refactoring and performance optimization. Skilled in evolving frontend architectures to support large-scale functional expansion while maintaining system stability

I am a Senior AI, Web & Mobile Engineer, building intelligent SaaS platforms, immersive web experiences, and cross-platform mobile apps that help businesses scale faster and cut costs. With 8+ years of experience across AI, web, and mobile development, I've delivered 40+ successful projects for startups and enterprises. I build production-ready, data-driven software - not just demos. My solutions think and learn: for example, I've developed AI order-processing engines that analyze 25,000+ SKUs and cut data-entry time by 97%, and voice-based chatbots that reduced customer service workloads by 50%. 🧠 𝐂𝐨𝐫𝐞 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 AI-driven SaaS & Web Apps, Cross-Platform Mobile Development (RN & Flutter), 3D & Interactive Web (Three.js), Multi-Agent Automation, LLM Integrations, Predictive Analytics, FinTech / Healthcare / CRM systems. I design end-to-end solutions: from scalable backends to intuitive UIs and immersive frontends. ⚙️ 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸 🤖 𝗔𝗜/𝗠𝗟: LangChain, LangGraph, OpenAI/GPT-4o, Claude API, Gemini, LlamaIndex, Hugging Face, TensorFlow, PyTorch, Scikit-learn, Whisper, Stable Diffusion, RAG (Pinecone, Weaviate, FAISS, ChromaDB), CrewAI, AutoGen. 🖥️ 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱: React, Next.js 14, TypeScript, Tailwind CSS, shadcn/ui, Framer Motion, Redux, Zustand, Three.js, React Three Fiber, WebGL, GSAP, D3.js. 📱 𝗠𝗼𝗯𝗶𝗹𝗲: React Native, Flutter, Expo, Firebase, Push Notifications, App Store & Play Store deployment, deep linking, offline-first architecture. 🔧 𝗕𝗮𝗰𝗸𝗲𝗻𝗱: Node.js (Express, Nest.js), Python (FastAPI, Django, Flask), REST/GraphQL APIs, WebSockets, gRPC, microservices, event-driven architecture. ☁️ 𝗖𝗹𝗼𝘂𝗱/𝗗𝗲𝘃𝗢𝗽𝘀: AWS (Lambda, SageMaker, EC2, S3, RDS), Azure, GCP, Docker, Kubernetes, Terraform, GitHub Actions, CI/CD pipelines, Vercel, Railway. 🗄️ 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀: PostgreSQL, MySQL, MongoDB, Redis, Supabase, PlanetScale, Elasticsearch, vector DBs (Pinecone, Weaviate, FAISS). 🔗 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻/𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻: Zapier, n8n, Make (Integromat), Airflow, Stripe, Twilio, SendGrid, Plaid, CRMs (HubSpot, Salesforce), Slack & Discord bots. 🚀 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀 𝗜 𝗣𝗿𝗼𝘃𝗶𝗱𝗲 ✅ AI SaaS platforms & LLM-powered products ✅ Chatbot & voice assistant development ✅ Cross-platform mobile apps (React Native & Flutter) ✅ 3D & interactive web experiences (Three.js / WebGL) ✅ Workflow automation & multi-agent orchestration ✅ Document analysis & RAG-based knowledge systems ✅ Custom NLP, computer vision & predictive analytics ✅ FinTech, Healthcare & CRM platform development ✅ API design, microservices & cloud infrastructure ✅ App Store & Play Store deployment & maintenance For example, I've built GPT-4 chatbots integrated into client CRMs, multi-tenant analytics dashboards, immersive 3D product visualizers, cross-platform mobile apps with 10k+ users, and automated data pipelines that increased efficiency by 60%. 💡 𝗪𝗵𝘆 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲 I focus on your business goals, not just code. You'll get a partner who can architect your product vision - through design, prototyping, and deployment - communicate clearly every step, and deliver a reliable, maintainable solution. 📩 If you want to integrate AI into your product, automate your operations, build a scalable web or mobile platform, or create immersive 3D experiences - let's chat. I'm happy to discuss your project and turn your idea into a fast, intelligent system.

I’m Prokhor, a Senior Full Stack developer with 6+ years of experience building applications for startups, product companies, and growing businesses. As a Full Stack developer, I work across both frontend and backend development, helping clients build products from scratch, improve existing systems, and support long-term growth. ✅ Experienced Senior Engineer turning complex requirements into production-ready software ✅ AI-Native Workflow Specialist delivering high-quality results with exceptional speed I’m a business-oriented software engineer and senior full stack developer. As a full stack software engineer, I help startups and SMBs turn their ideas into valuable digital products. Fast, stress-free, and with full delivery ownership. I work as a React developer / Front end developer (Front end developer React) and a backend developer on node.js (node) - specializing in high-performance Next.js and Node.js enterprise setups. Day-to-day I build full stack node.js react products. ⭐⭐⭐⭐⭐ "Excellent communication, deep technical knowledge, and proactive problem-solving. Delivered the integration ahead of schedule." - Recent Client Feedback ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 𝐒𝐤𝐢𝐥𝐥𝐬 & 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬 which I have expertise as a Full stack node.js react developer ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▸ Backend: Node.js, NestJS, Koa, Express, Fastify, TypeScript, RESTful APIs, GraphQL ▸ Frontend: React, Next.js, TailwindCSS, VueJS, HTML, CSS, Redux ▸ Databases: MongoDB, PostgreSQL, Redis, MongoDB, MySQL, ClickHouse, Relational & NoSQL systems ▸ DevOps & Cloud: AWS, Azure, Vercel, CI/CD, Google Cloud, Render ▸ Tools & Workflows: AI-assisted development, Claude Code, Cursor, Git, Webpack ▸ CMS: Payload, Contentful, Strapi I deliver end-to-end web apps as a full stack react developer, combining clean UI work with reliable backend architecture. On the server side, I work as a full stack developer node / full stack developer node js, building secure APIs, complex JWT/OAuth authentication flows, and data sync layers; on the client side, I build full stack react interfaces and high-performance full stack react js components. When a product requires a unified stack, I seamlessly connect frontend and backend using react node, ensuring features are scalable, secure, and fully production-ready. When needed, I step in to manage development workflows and lead technical execution: from database design, migrations, and performance tuning to secure third-party integrations. I have deep experience handling advanced integration challenges, resolving Content Security Policy (CSP) conflicts, managing Cookiebot compliance, and implementing robust frontend/backend architectures. I’ve also built custom statistical analysis tools, matching platforms, and complex analytical systems. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬 𝐈 𝐡𝐚𝐯𝐞 𝐰𝐨𝐫𝐤𝐞𝐝 𝐰𝐢𝐭𝐡 as Full stack Developer React Node ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▸ International Logistics & Supply Chain ▸ FinTech & Banking Integrations ▸ Real Estate & Property Management ▸ Gaming Analytics & Statistics Platforms ▸ SaaS & Custom Business Automation I ship modern website work as a web developer / full stack web developer / full stack website developer. I collaborate closely with UI/UX teams, acting as a technical partner to ensure design requirements match high-performance frontend engineering. If you need a reliable full stack engineer who can take full ownership from idea → production, let’s connect. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📩 LET’S CONNECT ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Message me to discuss your project requirements. No pitch decks, just pure engineering value and clean execution. 𝐖𝐚𝐫𝐦 𝐑𝐞𝐠𝐚𝐫𝐝𝐬!