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Rating is 4.8 out of 5.
4.8/5
Based on 808 client reviews
Yaroslav D.

Prosyana, Ukraine

$40/hr
5.0
46 jobs

๐Ÿ”ฅ๐Ÿ”ฅ๐Ÿ”ฅ๐…๐ซ๐ž๐ž ๐›๐ซ๐ข๐ž๐Ÿ + ๐š๐ฎ๐๐ข๐ญ. ๐ˆ๐Ÿ ๐ˆ ๐ญ๐ก๐ข๐ง๐ค ๐ฒ๐จ๐ฎ๐ซ ๐ข๐๐ž๐š ๐ฐ๐จ๐ง'๐ญ ๐ฐ๐จ๐ซ๐ค, ๐ˆ'๐ฅ๐ฅ ๐ญ๐ž๐ฅ๐ฅ ๐ฒ๐จ๐ฎ ๐›๐ž๐Ÿ๐จ๐ซ๐ž ๐ฒ๐จ๐ฎ ๐ฉ๐š๐ฒ ๐ฆ๐ž - ๐ซ๐ž๐ฏ๐จ๐ฅ๐ฎ๐ญ๐ข๐จ๐ง๐š๐ซ๐ฒ ๐œ๐จ๐ง๐œ๐ž๐ฉ๐ญ, ๐ˆ ๐ค๐ง๐จ๐ฐ๐Ÿ”ฅ๐Ÿ”ฅ๐Ÿ”ฅ Facts about me: ๐Ÿ…527 products launched to production ๐Ÿ†Built a React Native app that hit $118k MRR within 6 months of launch ๐Ÿš€Top 1% React Native Developer on Upwork (Expert-Vetted) ๐ŸŽฏShipped direct competitors to Nike Training Club, Find My (Apple) and Flo ๐Ÿ’ฒ$12.4M+ generated in client revenue โญ Systems supporting 100K+ MAU with 99.9% uptime ๐Ÿ“ˆ 30,000+ engineering hours logged across mobile + web ๐Ÿ’ณ Payment systems (Stripe, billing, marketplaces) processing $4.7M+ in transactions โœ…Choose โ€œ๐ˆ๐๐•๐ˆ๐“๐„โ€ and drop me a secret ๐๐‘๐Ž๐Œ๐Ž โ€œ๐”๐๐–๐Ž๐‘๐Šโ€ to receive a๐…๐‘๐„๐„ ๐‚๐Ž๐๐’๐”๐‹๐“๐€๐“๐ˆ๐Ž๐! My Process ๐Ÿ’ช Step 1 โ€” Free brief + audit. Send your idea, prototype, Figma files, or existing codebase. As a React Native Developer and Full Stack Developer, I review architecture, scope, risk, and feasibility across mobile and web โ€” no charge, no obligation. Most audits turn around within 24โ€“48 hours. Step 2 โ€” AI-powered prototype. Using Claude Code, Cursor, and OpenAI/Gemini integrations, I build a working, testable React Native or React Next.js prototype in 3โ€“7 days, not months โ€” so you validate real demand before committing to full development. This is the same AI-driven approach that's cut manual workflows by 30โ€“50% and shaved 30โ€“40% off time-to-market on past projects. Step 3 โ€” Build. Full-stack build across React Native Mobile, React Native Expo, React Native Firebase, and web (React, Next.js, Node.js, Supabase/PostgreSQL, MongoDB), with weekly demos so you always know exactly what's shipped and what's next. Sprints run in 1โ€“2 week cycles with clear, measurable milestones โ€” the structure behind 100+ delivered projects and 60+ full production launches. Step 4 โ€” Launch + scale. Deployment (AWS, Google Cloud, or Azure), CI/CD, monitoring, and post-launch optimization โ€” the same DevOps React Native process that's taken apps from 0 to 100K+ MAU, 99.9% uptime, and 5M+ requests/month, while cutting infra overhead by 35% and backend costs by 40%. As a full-stack React Native Developer with 20,000+ hours of hands-on experience across mobile and web platforms, I specialize in React Native, Flutter, React.js, React Native Mobile, React Native Expo, React Native Firebase, React Native WebRTC to build mobile apps. This React Native Developer / React Native Engineer has deep expertise in front-end development using Vue.js, Angular, Next.js, and Laravel to deliver responsive. Over 10 years, this React Native Developer has partnered with 30+ teams across the world - shipping 100+ projects with measurable results. As a React Native Developer operating at the intersection of mobile and full-stack development, I bring 20,000+ hrs of engineering expertise in React Native mobile architecture, Expo, React Native Firebase, and React Native WebRTC. This React Native Developer has delivered mobile app development solutions across fitness, fintech, and neo-banking verticals, working alongside flutter developers, android engineers, and Kotlin specialists to ensure cross-platform quality on every build. In addition to mobile expertise, this React Native Developer extends deep capability into backend development โ€” MERN, Node.js, Laravel, Python with Django, and Ruby on Rails โ€” enabling end-to-end delivery across 100+ projects without switching teams. As both a react developer and full stack developer, this React Native Developer has led architecture decisions for scalable REST APIs, Python REST API integrations, and database systems (MySQL, MongoDB) for clients across 30+ global teams. This React Native Developer has also designed and optimized 100+ WordPress and Shopify websites for SEO and conversion, working as both a Shopify and WordPress front-end developer. As a React Native Developer who understands the full product lifecycle, I integrate Auth0, Stripe payment systems, and blockchain modules while leveraging Webflow and Elementor for custom web experiences โ€” delivering cohesive digital products from mobile app to web. With 20,000+ hours logged as a Senior React Native Full Stack developer, I specialize in React Native Expo (expo), React Native Firebase, React Native WebRTC, and React Native Engineer workflows across iOS and Android. This React Native Developer has shipped 100+ mobile app development react native apps spanning flutter mobile app development, ios mobile app development, and android โ€” bringing a flutter developer and kotlin perspective to every cross-platform architecture decision. As a React Native App Develope w full-stack depth, I excel in Node.js, Express.js, and PHP (including Laravel), alongside RESTful API and payment system integration. Across 100+ delivered projects, this React Native Developer has built cross-platform React Native mobile apps using Expo to streamline deployment.

  • React Native
  • React
  • Node.js
  • CSS
  • HTML
  • JavaScript
  • TypeScript
  • Flutter
  • MongoDB
  • Redux
  • HTML5
  • SQL
  • Bootstrap
  • Git
  • Python
  • Responsive Design
  • jQuery
  • WordPress
  • Software Development
  • Vue.js
Yurij M.

Lviv, Ukraine

$35/hr
4.7
68 jobs

Top 3% in Development Over 90% of the projects I've worked on have gone live, and more than 70% are still active today ABOUT ME 8+ years and 42+ products as a Full Stack Developer React Node in SaaS Platform, MVP, AI-Powered and Web Application delivery $3.8M+ client impact, $900K+ direct revenue volume as a React Developer 20,000+ active users across Web + Mobile Apps where Frontend React Developer execution with n8n supabase lifted engagement by 18โ€“27%. 10,000+ users in Healthcare Web Application and HIPAA-Compliant systems where Frontend React Developer (flutterflow, v0, aws) ownership cut admin friction by 40%. 2,423 completed orders, 489 registered customers in Ecommerce Website and CRM Platform MVP as a Full Stack Developer React Node. 90% faster order processing, 80% lower manager workload through Workflow Automation, Document Workflow, and Frontend React Developer improvements. 1,666+ catalog items, 4-role access, 2.7x operational capacity in B2B Marketplace and Registration and CRM System as a Full Stack Developer React Node. 5โ€“8 weeks shorter MVP to Pilot Launch, 35% fewer bugs through Existing Codebase and Productionise work as a Full Stack Developer React Node $900K+ in client revenue as react next js developer, and 8 years as web app developer react / react app developer 8+ yrs. Senior Full-Stack Engineer $3.8M+ client impact, end-to-end ownership as Full Stack Developer React Node 18โ€“27% engagement lift, clarity and trust as Frontend React Developer 30โ€“40% faster cycles, cleaner UX, stronger retention across SaaS Platform products as React Developer WHERE I DELIVER As a Frontend React Developer - 20+ systems with UI Development, UI/UX, Dashboard Build, Responsive UI Build across SaaS Platform, Booking Platform, Ecommerce Website. As a React Developer - 15+ launches in full stack developer nextjs environments, 30โ€“40% faster iteration through Design-to-Code and Component Development. As a Full Stack Developer React Node - 25+ end-to-end builds with Backend API, Backend System Development, Data Architecture, Secure, Scalable architecture from Early-Stage MVP to Live SaaS Platform. As a frontend developer react, front end developer react, react native expo - web design, UI Polish ( ux designer ), front end development improving conversion by 15โ€“22%. 10+ deployed mobile app in app and google play store as react native developer expo, react native app developer. 12โ€“19% better repeat usage through booking, notifications, payments as front-end developer flutter and mobile app developer. As a frontend developer angular, python developer, python full stack developer django - 12+ backend-heavy products, 28% lower delivery risk ( nodejs ). As a Full Stack Developer React Node - 6โ€“18 month cycles through Scale Existing Platform, Professionalize & Scale, Review, Improve & Launch as a Long-Term Development Partner. As a full stack react developer and full stack developer supabase react - 99%+ delivery consistency across distributed teams. INDUSTRY IMPACT Marketplace Platform, B2B Marketplace, Two-Sided Marketplace, B2B Services - 50,000+ active listings, 20%+ better lead quality, and a 35% increase in conversion rates as a Frontend React Developer and Full Stack Developer React Node handling $2M+ in monthly transaction volume. Healthcare Web Application, Clinic Management SaaS, Telehealth, HIPAA-Compliant - 10,000+ active users, 500+ daily appointments processed, 25%+ better staff capacity, and 15% fewer patient no-shows as a Frontend React Developer maintaining 99.9% system uptime. AI-Powered - 5+ products deployed, Custom AI Solutions, AI Agent Platform, AI Chatbot, RAG Chatbot, OpenAI, Claude API, FastAPI as a React Developer and Full Stack Developer React Node, processing 15,000+ daily prompts and reducing manual query resolution time by 40%. Logistics Platform, ERP, Internal Workflow Management System, Owner Dashboard - up to 12 hours saved per order cycle, 30%+ faster reporting, and a 40% reduction in data entry errors across 5+ regional hubs as a Full Stack Developer React Node. Research Platform, LegalTech SaaS, Fintech MVP, PropTech MVP - 18% better adoption, 40% higher user retention over 6 months, and structured permissions managing 3 distinct access levels for 5,000+ users through Frontend React Developer HOW I BUILD 25+ products as a Frontend React Developer: java react, react.js, react native mobile, react next tailwind frontend, javascript, typescript, html, html5, css3, Tailwind CSS, React Bootstrap frontend, Responsive Design, jQuery. 15+ systems as a Full Stack Developer React Node: supabase postgres, laravel, MySQL, MongoDB, firebase, stripe. Integrations across payment, maps, auth, and third-party APIs. 10+ ecosystems: wordpress developer, shopify, web3 frontend, php, .net, flask, vue.js, svelte, webflow, mern stack as a react js developer and react web developer. 40+ products: git, Software Development, Software Architecture & Design, Front-End Development with engineer mindset.

  • React Native
  • React
  • Node.js
  • JavaScript
  • HTML5
  • CSS 3
  • PHP
  • CSS
  • Bootstrap
  • TypeScript
  • Vue.js
  • MongoDB
  • HTML
  • Web Design
  • Responsive Design
  • jQuery
  • Redux
  • WordPress
  • Software Development
  • Python
Michael P.

Lviv, Ukraine

$35/hr
4.9
131 jobs

I don't just write React Native code. I ship apps people actually use. 1M+ downloads. 30+ countries. 200+ projects. 100% Job Success. Most clients come to me when their React Native app is stuck, broken, or half-built and nobody else could finish it. Or when they need a mobile app developer who handles everything from first screen to App Store and Google Play launch. Some come with an MVP idea and need a react native developer who moves fast without cutting corners. Others come because their react native mobile app has performance issues or complex integrations nobody else could solve. I've been doing this for 8+ years, delivered 200+ projects, and the apps I've built as a mobile app developer now serve 590K+ users across 30+ countries. WHAT I BUILD As a react native developer and react native engineer I cover the full mobile lifecycle across 200+ shipped products: โœฆ React Native mobile apps with Expo and CLI for iOS and Android โœฆ React Native Expo MVPs shipped from first screen to App Store and Google Play โœฆ React Native Firebase integrations โ€” auth, Firestore, real-time sync, push notifications โœฆ React Native Supabase backends and React Native Node.js APIs that scale with the product โœฆ AI mobile app development with OpenAI API, real-time features, and on-device intelligence โœฆ In-app purchases, RevenueCat subscriptions, AdMob, deep linking, and push notifications โœฆ Native Swift and Kotlin modules and android kotlin integrations when cross-platform isn't enough โœฆ App Store and Google Play submissions including rejections, TestFlight, and review handling I work as a react native full stack developer so clients don't need to hire two separate people. Firebase, Supabase, and Node.js on the backend โ€” one team, one codebase, one point of contact. INDUSTRIES I've shipped products as a mobile app developer and mobile application developer across multiple verticals. In Fintech and Crypto I built a trading platform with 590K+ registered users and 2M+ monthly visitors. In Healthcare and Wellness I delivered apps with 100K+ downloads, a 4.9 App Store rating, and users across 30+ countries. In EdTech I shipped language learning and trivia apps that together reached 1M+ downloads. I've also delivered E-commerce, SaaS MVPs, Hospitality, and On-demand platforms: โœฆ Fintech and Crypto โ€” 590K+ users, 2M+ monthly visitors โœฆ Healthcare and Wellness โ€” 100K+ downloads, 4.9 App Store rating, 30+ countries โœฆ EdTech โ€” 1M+ downloads across 30+ countries โœฆ E-commerce and Marketplace โœฆ SaaS and Startup MVPs โœฆ Hospitality and On-demand Services WEB AND FULL STACK On the web side I work as a react developer and front end developer building platforms with React, Next.js, and Node.js. I've delivered react nextjs products, full stack developer react node systems, and full stack developer ai projects with LLM integrations and OpenAI workflows. I've worked alongside Vue and Angular codebases and helped clients migrate from WordPress to modern React stacks. On larger projects I work as a web developer delivering both mobile and web from the same team. Clients who need an app developer ios android with full backend ownership also work with me on ios android developer projects. I collaborate with flutter developer and android developer teams when needed, and I structure codebases that a python developer or backend node.js team can extend later. WHY CLIENTS WORK WITH ME โœฆ 8+ years as a react native developer and mobile app developer โ€” 200+ projects, 1M+ downloads, 30+ countries โœฆ React native full stack developer โ€” mobile frontend and backend in one engagement โœฆ Fast at complex bugs, App Store rejections, and performance issues others couldn't fix โœฆ Clear written communication and honest timelines, no surprises โœฆ Available after launch for support, new features, and scaling WHAT CLIENTS SAY "Michael is an outstanding react native developer โ€” skilled, reliable, and delivers clean, efficient code." "Succeeded on complex React Native bugs where others failed." "Exceeded our expectations." If you're looking for an experienced react native developer and mobile app developer who gets things shipped โ€” press Invite or send a message.

  • React Native
  • Mobile App Development
  • React
  • iOS Development
  • Expo.io
  • JavaScript
  • Android App Development
  • Node.js
  • TypeScript
  • Next.js
  • Full-Stack Development
  • Firebase
  • API Integration
  • Front-End Development
  • Supabase
  • Redux
  • AI App Development
  • OpenAI API
  • GraphQL
  • Swift
Eldar M.

Kyiv, Ukraine

$39/hr
5.0
115 jobs

Hi, I'm Eldar, your future technical partner here on the Upwork :) โšก AI-streamlined delivery: expect a working MVP in 1โ€“2 weeks. I'm a senior Flutter Developer and full stack developer at Dreambit with 10+ years in full-cycle Mobile App Development, and I use AI across the whole workflow โ€” planning, code generation, testing, and review โ€” to compress timelines where that is possible without cutting corners. I've delivered 50+ apps with 100K+ downloads and a consistent 5-star rating, working with startups, agencies, and enterprise clients to plan, build, and scale products that thrive in the real world, going well beyond the traditional mobile app developer role. As a dedicated flutter app developer, I ship iOS Development, Android App Development, and Web from a single Flutter Stack + Dart codebase โ€” one source of truth running natively on every smartphone, which is how I keep delivery fast and maintenance low across those 50+ launches. Need to move quickly on an MVP? I work as a flutterflow developer to validate ideas in days. Need depth? I hand-write flutter for complex products and build rock-solid flutter firebase backends (auth, Firestore, Cloud Functions, push) โ€” including offline-first sync engines with conflict resolution, payments, and real-time sessions that hold up at 100K+ users. I'm also a seasoned React Native Developer with deep React experience. If your product runs on react native mobile, I cover react native expo and bare workflows, native react native ios builds, polished Android UI, and fluid 60fps react native animation. Plenty of clients arrive needing mobile app development react native support and stay for a cleaner, unified foundation โ€” whether you're hiring your first react developer, replacing a previous react native developer, or migrating off one entirely, I make the transition painless. Beyond the app I work as a web developer, building secure APIs and admin panels with Node.js, NestJS, TypeScript, and Python, integrating cleanly with whatever you already run โ€” including a legacy Laravel backend โ€” so your mobile app and web dashboard stay in sync. My stack: Flutter, Dart, React Native, Firebase, Node.js, TypeScript, JavaScript, Swift, Kotlin, Java, Python. I also add AI features that feel native to the product โ€” orchestrating LLM workflows, intelligent agents, and "chat with your data" setups with guardrails and cost control, so you get real utility, not buzzwords. As a senior mobile application developer, I own the full lifecycle: thoughtful mobile app design and UI/UX (a big reason behind that 5-star rating), plus practical input on mobile app marketing and store optimization so your launch actually lands. Industries: Healthcare, Fintech, Social & dating, Meditation, Astrology, and E-commerce โ€” including secure, regulated environments. We handle compliance-heavy projects and stay current with EU and US rules, and we're registered in both the US and EU, so billing and invoices are never a problem. You can check our quality right now in the stores โ€” this year we've already shipped 7 apps (15 last year), and "release" never means we walk away: many products run on a 6-month roadmap with updates every 2โ€“4 weeks. I act as your partner across the whole journey โ€” consultation, technical decisions, design, or publishing help โ€” you can count on me and my team. We don't just deliver the project; we flag the risks and find the fastest path to your ROI. And if you need help with an existing app โ€” a rescue, or lifting conversion and retention โ€” my experience is fully at your disposal. Dreambit cares โ€” whether you're non-technical, just starting your development journey, scaling an existing business or app, or you need serious expertise in mobile development and AI integration for your product or a wider service offering. If what you're really after is reliable, honest work here on Upwork, you've found the right team. Why Dreambit: โœ… Total Ownership from Day One โ€” you hold the keys to all source code, repositories, and accounts, and always see exactly what you're paying for through clean, meaningful commits. โœ… Guaranteed Pricing & "No Demo, No Invoice" โ€” we never exceed our pessimistic estimates unless scope changes; milestone payments are strictly tied to live demos of working features. โœ… Transparent Team, No Subcontractor Secrets โ€” the team you meet is the team that builds your product; direct access to your developers, no bait-and-switch, no unvetted offshore handoffs. โœ… Extreme Ownership & Weekly Demos โ€” no finger-pointing, no hiding from calls; proactive weekly updates, and if a challenge arises, we bring solutions, not excuses. โœ… Built-in QA & Warranty โ€” built to scale, not to break; work is "done" only after rigorous UAT, backed by a one-month bug-free warranty on every invoice. ๐Ÿ“ฉ Message me for a free 30โ€“60 min consultation and I'll share my Upwork scheduler link Updated 05.07.2026

  • React Native
  • Smartphone
  • Mobile App Development
  • React
  • iOS Development
  • Flutter
  • Android App Development
  • Firebase
  • Android
  • Node.js
  • iOS
  • JavaScript
  • Dart
  • Swift
  • TypeScript
  • Mobile App Design
  • Python
  • Java
  • Flutter Stack
  • Kotlin
Evhen P.

Khmelnytskyi, Ukraine

$33/hr
5.0
25 jobs

๐Ÿ“ฑ ๐—ง๐—ผ๐—ฝ ๐—ฅ๐—ฎ๐˜๐—ฒ๐—ฑ ๐—ฅ๐—ฒ๐—ฎ๐—ฐ๐˜ ๐—ก๐—ฎ๐˜๐—ถ๐˜ƒ๐—ฒ ๐——๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—ฒ๐—ฟ ยท ๐Ÿญ๐Ÿฌ๐Ÿฌ% ๐—๐—ฆ๐—ฆ ยท ๐Ÿณ๐Ÿฌ+ ๐—ฎ๐—ฝ๐—ฝ๐˜€ ยท ๐Ÿฑ ๐˜†๐—ฟ๐˜€ ยท ๐—น๐—ถ๐—ณ๐—ฒ๐˜๐—ถ๐—บ๐—ฒ ๐˜„๐—ฎ๐—ฟ๐—ฟ๐—ฎ๐—ป๐˜๐˜† ๐—ผ๐—ป ๐—ฒ๐˜ƒ๐—ฒ๐—ฟ๐˜† ๐—ฎ๐—ฝ๐—ฝ ๐—œ ๐—ฑ๐—ฒ๐—น๐—ถ๐˜ƒ๐—ฒ๐—ฟ Clients come to me when the app needs to work - not just launch. Whatever it takes: complex state management, real-time sync, API integration, HIPAA flows, wearables, in-app purchases, AI features. I've shipped all of it. Every line still mine to support. ๐Ÿ‘‰ ๐—–๐—น๐—ถ๐—ฐ๐—ธ ๐—›๐—ถ๐—ฟ๐—ฒ ๐—ผ๐—ฟ ๐—œ๐—ป๐˜ƒ๐—ถ๐˜๐—ฒ to work with a React Native Developer and iOS Developer who owns the product, not just the sprint. ๐ŸŽฏ ๐—ช๐—›๐—”๐—ง ๐—ฌ๐—ข๐—จ ๐—š๐—˜๐—ง โœ”๏ธ As a React Native Developer and iOS Developer with 70+ shipped apps - complex state, real-time sync, third-party APIs, HIPAA-sensitive data flows, wearable integration. Not a prototype - a product that holds in production. โœ”๏ธ As a Mobile App Development React Native specialist - one TypeScript codebase, iOS and Android, App Store and Play Market. Firebase, Redux, push notifications, subscriptions. 40โ€“60% faster launch than split native teams. โœ”๏ธ As a Mobile App Developer and React Native Developer for long builds - 6โ€“18 months, mobile app redesign, scaling live codebases. 100% client retention across 5 years. โœ”๏ธ As a full stack developer react native - Node.js, REST APIs, Firebase, end-to-end mobile app development. ๐Ÿ”ฅ ๐—”๐—–๐—›๐—œ๐—˜๐—ฉ๐—˜๐— ๐—˜๐—ก๐—ง๐—ฆ โœ”๏ธ 5 years ยท 70+ apps as a React Native Developer and Mobile App Developer - Healthcare, Wellness, Fitness ยท US, EU, global. โœ”๏ธ 30โ€“45% better retention across 15+ Mobile App Development React Native builds - wearable sync, HIPAA-compliant. โœ”๏ธ 40โ€“60% faster time-to-market as a Mobile App Developer and iOS Developer vs split native teams - one codebase, full parity. โœ”๏ธ 2x faster onboarding as a Mobile App Developer - smart flows, push notifications, subscription logic. โœ”๏ธ 100% satisfaction ยท Mobile App Developer lifetime code warranty across every engagement. ๐Ÿš€ ๐—ช๐—›๐—˜๐—ฅ๐—˜ ๐—œ ๐——๐—˜๐—Ÿ๐—œ๐—ฉ๐—˜๐—ฅ โœ”๏ธ Patient engagement, wearable & sensor sync, HIPAA-sensitive data - as a React Native Developer this is core territory. 15+ Healthcare Mobile App Development React Native products shipped. โœ”๏ธ Fitness booking, real-time workout sync, athlete health tracking - as a Mobile App Developer and iOS Developer for sports and wellness, apps users open daily. โœ”๏ธ Corporate wellness - Mobile App Development React Native: react native expo, react native developer expo, react native tailwind UI, multi-role, subscription-driven, production-grade. โœ”๏ธ AI wardrobe, lifestyle, and consumer products - react native app developer work across react native mobile, react native engineer, mobile application developer builds where UX drives retention. โœ”๏ธ E-Commerce and shopify mobile app builds - mobile app design, mobile app development as a Mobile App Developer delivering Mobile App Development React Native with 20โ€“30% better conversion. ๐Ÿ† ๐—œ๐—ก๐——๐—จ๐—ฆ๐—ง๐—ฅ๐—ฌ ๐—ฉ๐—˜๐—ฅ๐—ง๐—œ๐—–๐—”๐—Ÿ๐—ฆ โœ”๏ธ Healthcare & Clinical - React Native Developer and iOS Developer: HIPAA patient platforms, wearable sync, clinical-grade UX. 30โ€“45% adherence. โœ”๏ธ Fitness & Sports - Mobile App Developer and iOS Developer: real-time sync, booking, Strava API. 2x onboarding. โœ”๏ธ Corporate Wellness - Mobile App Developer: Mobile App Development React Native for EU-market B2B, multi-role. 25โ€“35% engagement. โœ”๏ธ AI & Lifestyle - React Native Developer: AI wardrobe, bubble-style UX, react native mobile consumer products. โœ”๏ธ E-Commerce & Shopify - Mobile App Developer: shopify mobile app, mobile app design, Mobile App Development React Native that converts. โš’๏ธ ๐—›๐—ข๐—ช ๐—œ ๐—•๐—จ๐—œ๐—Ÿ๐—— โœ”๏ธ 70+ apps as a React Native Developer: React Native, React, JavaScript, TypeScript, Redux, Firebase, Node.js, REST APIs, react native expo, react native tailwind - full Mobile App Development React Native stack. โœ”๏ธ Native layer as an iOS Developer and Android specialist: iOS Development (Swift, HealthKit, App Store), Android App Development (Kotlin, Google Fit, Play Market), Smartphone, Native App Development. โœ”๏ธ UI layer: HTML, HTML5, CSS, CSS3, CSS 3, Responsive Design, Mobile App Design, Web Design - react developer and web developer-aware patterns. โœ”๏ธ Backend & data as a full stack developer react native: Node.js, MongoDB, SQL, PHP, Python, Laravel, WordPress, Vue.js, Angular, Java, Git, Software Architecture & Design, Software Development, Debugging. โœ”๏ธ Ecosystem: Flutter, flutter developer App Development, Mobile App Redesign, Desktop Application, Shopify, Web Development, python developer tools, business analyst-grade ownership. ๐Ÿ”น Lifetime warranty - every bug on my side fixed, no questions asked, for as long as your app is live. ๐Ÿ”น Full ownership as an iOS Developer and React Native Developer - architecture, build, App Store & Play Market. ๐Ÿ”น React Native Developer ยท iOS Developer ยท Mobile App Developer ยท Mobile App Development React Native ยท 70+ apps ยท 100% JSS. Building a mobile product on React Native? Message me ๐Ÿ’ฌ

  • React Native
  • Smartphone
  • Mobile App Development
  • React
  • Android
  • JavaScript
  • iOS Development
  • Android App Development
  • iOS
  • Node.js
  • TypeScript
  • Firebase
  • Flutter
  • CSS
  • HTML
  • Redux
  • MongoDB
  • PHP
  • Swift
  • Software Architecture & Design
Mykhailo D.

Lviv, Ukraine

$35/hr
4.9
86 jobs

โญ๏ธYour ๐‘๐„๐‹๐ˆ๐€๐๐‹๐„ tech partner who wonโ€™t miss ๐ƒ๐„๐€๐ƒ๐‹๐ˆ๐๐„๐’โฐ,wonโ€™t break the ๐๐€๐๐Š๐Ÿ’ฐand will deliver a ๐’๐‚๐€๐‹๐€๐๐‹๐„ ๐’๐Ž๐‹๐”๐“๐ˆ๐Ž๐๐Ÿ“ˆthat wonโ€™t need to be rebuilt from scratch later๐Ÿ”ง ๐Ÿ’ก 130+ production-grade products delivered (SaaS, MVPs, AI systems, marketplaces) ๐Ÿ’ฐ $16.5M+ revenue generated by client products ๐Ÿ‘ฅ 158K+ active users powered by systems I built โšก 1M+ API requests/month at 99.9% uptime ๐Ÿš€ MVP โ†’ production in 2โ€“6 weeks, architected to scale from day one ๐Ÿ”ฅ 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. ๐Ÿ”ฅ ROLES I TAKE ON (10+ YEARS EXPERIENCE) โœ” Full Stack Developer / Full Stack Engineer โ€” 40+ end-to-end SaaS platforms (React + Node.js), 10+ years โœ” Frontend Developer / Front-End Developer โ€” 30+ production UI builds, 10+ years โœ” React Developer / React.js / ReactJS Developer โ€” scalable React apps since 2015, 10+ years โœ” Node.js / NodeJS Developer / Backend Developer โ€” 25+ APIs, 1M+ req/month, 10+ years โœ” Vue.js Developer / Nuxt.js Developer โ€” 8+ Vue projects, 8+ years โœ” Next.js Developer / NextJS Developer โ€” 15+ SSR/SSG SaaS platforms, 7+ years โœ” TypeScript Developer / JavaScript Developer โ€” 50+ typed and untyped JS codebases, 10+ years โœ” SaaS Developer / Web App Developer โ€” MVP to scale, 10+ years โœ” Lead Frontend Engineer / Senior Full Stack Engineer โ€” team leadership on 18+ projects ๐Ÿ”ฅ INDUSTRIES I SERVE โš–๏ธ For LegalTech founders โ€” 6+ Case Management Systems, Document Workflows, Client Portals, Compliance SaaS ๐Ÿฅ For Healthcare & MedTech โ€” 8+ Patient Platforms, Telehealth, HIPAA-Compliant data, Clinic Management SaaS ๐Ÿ“ฆ For Logistics & supply chain โ€” 5+ Logistics Platforms, real-time tracking (sea/air/truck), Project44, INTTRA, EDI ๐Ÿ›’ For Marketplace & e-commerce โ€” 15+ Multi-Vendor Marketplaces, B2B & Two-Sided Marketplace, Stripe, bidding, complex search ๐Ÿค– For AI startups โ€” 12+ AI-Powered products: OpenAI / Claude API / LLM, RAG Chatbots, AI Agent Platforms, vector DBs, FastAPI, browser extensions ๐Ÿ“ For No-code & enterprise SaaS โ€” 10+ Form Builders, Admin Dashboards, Internal Tools, Microservices, Multi-tenant ๐ŸŒ For Media, AdTech & publishing โ€” 6+ Publisher Platforms, CMS, payment gateways, Analytics Dashboards ๐Ÿ  For Real estate & PropTech โ€” Property Listings, Bidding & Auction systems, Agent Dashboards ๐Ÿ’ฐ For FinTech founders โ€” Stripe Connect, subscription billing, multi-currency, KYC, Fintech MVP ๐Ÿ“š For EdTech โ€” course delivery, student dashboards, progress tracking, live sessions ๐Ÿ”ฅ RESULTS I DELIVER โœ” MVP โ†’ production in 2โ€“6 weeks, 35% fewer bugs, 5โ€“8 weeks shorter delivery cycle โœ” Frontend: LCP under 1.5s, Lighthouse 90+, bundle reduced 40%, 18โ€“27% engagement uplift โœ” Backend: 1M+ API requests/month, 99.9% uptime, 40โ€“60% lower latency โœ” Database: 3โ€“5x faster response, 70% less DB load; 90% faster workflows, 65% fewer back-office actions โœ” +30% conversion on React / Next.js apps; 15โ€“22% better marketplace lead quality โœ” 15,000+ shipment operations/month, 2,423+ completed orders, 30,000+ healthcare users โœ” 20+ SaaS MVPs launched, 47% fewer bugs in legacy modernization ๐Ÿ”ฅ 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: 1๏ธโƒฃ Discovery & scoping (2โ€“3 days) โ€” define MVP boundary 2๏ธโƒฃ Architecture โ€” clean foundations, scalable schema, right stack 3๏ธโƒฃ Weekly sprints with demos โ€” progress every week 4๏ธโƒฃ Production launch โ€” CI/CD, monitoring, error tracking 5๏ธโƒฃ Post-launch support โ€” most clients keep me on ๐Ÿ”ฅ 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, 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 ๐Ÿš€ Building a SaaS, MVP, marketplace, or AI-powered product? Click "Invite" or "Hire" and send the brief.

  • React Native
  • React
  • HTML
  • CSS
  • HTML5
  • Node.js
  • JavaScript
  • Bootstrap
  • jQuery
  • CSS 3
  • Vue.js
  • Nuxt.js
  • Front-End Development
  • Next.js
  • MongoDB
  • Redux
  • TypeScript
  • React Bootstrap
  • Python
  • Software Development

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