Yaroslav D.

About me: 𝐌𝐲 𝐧𝐞𝐢𝐠𝐡𝐛𝐨𝐫𝐬 𝐬𝐚𝐲 𝐈’𝐦 𝐪𝐮𝐢𝐞𝐭. 𝐌𝐲 𝐒𝐩𝐨𝐭𝐢𝐟𝐲 𝐬𝐚𝐲𝐬 𝐈 𝐡𝐚𝐯𝐞 𝐚 𝐥𝐨𝐭 𝐨𝐟 𝐨𝐩𝐢𝐧𝐢𝐨𝐧𝐬 🎧 🏆 Expert-Vetted | Top 100 Rising Startups of 2025 | 10+ Years Experience 💰 $300K+ earned on Upwork | 200+ products built 🎯100% Job Success Score What you get: ✅ Working MVP in 7 days, not just a prototype ✅ AI-accelerated development without cutting quality ✅ Clean UI/UX built for your first users ✅ Core features only, no wasted budget ✅ Roadmap for scaling after launch How it works: 1️⃣ Day 1: Idea call + scope 2️⃣ Days 2-5: Design and build 3️⃣ Days 6-7: Testing + launch I'm a React Native developer and full stack developer with over 30,000 hours of experience across React Native Expo, React Native Firebase, and native React Native Android builds. I've delivered 60+ React Native mobile app development projects across 35+ industries, working as a React Native engineer who moves between React Native TypeScript codebases and React Native UI UX design, with React Native animation built in wherever it makes the product feel more native. ⚡ A marketplace client came to me with just an idea, and I delivered a full React Native mobile app from scratch — Node.js and MongoDB backend, Redux for state, and Firebase for auth and push notifications. I launched it on both the App Store and Google Play, then worked directly with the founder on onboarding flows and referral incentives; within 6 months the app had scaled to 200,000+ customers, and it now processes over 8,000 transactions a week. 🔥 For Champstracker, a React Native full stack build, I handled Firebase authentication, in-app payments, custom React Native animation for the workout engine, and a Redux-managed state layer across 40+ screens. The app grew to 85,000+ active users, holds a 4.7★ rating across 12,000+ reviews, and now generates $40,000+ in monthly recurring revenue, up from $0 at launch 14 months earlier. 🚀 Catwalk app needed a React Native developer who could move fast, so I paired a React Native TypeScript front-end with a Node.js and MongoDB backend and shipped the MVP in 9 weeks flat. Within the first year the app passed 100,000+ downloads and the company went on to raise a $2.3M seed round with 5 full-time hires added in the following 6 months. 📈 For a logistics client, I rebuilt an aging tracking app as a React Native mobile app with Firebase-powered real-time updates, HTML5 and CSS front-end reporting screens, and a Bootstrap-based admin dashboard. Daily active users grew from 500 to 18,000+ within 6 months, support tickets dropped 45%, and average session length rose from 2 minutes to 7 minutes across 4 core screens. 💡 I also compared Flutter against React Native for a retail client migrating away from a 6-year-old jQuery and WordPress stack, and React Native won out on performance and long-term maintainability. Page load times fell 60%, the crash rate dropped from 4.2% to under 0.3%, and the store rating climbed from 3.8 to 4.6★ within 90 days across 2 app store listings. Across all of this software development work, I've shipped React Native code alongside JavaScript, Python, and SQL on the backend, launched 25+ apps live on the App Store and Google Play combined, and haven't missed a launch deadline in 3 years across 60+ contracts. My Upwork record shows the same consistency: 100% Job Success, a 5.0★ rating from 30+ clients, and Top Rated status maintained for 4 consecutive years. 😎 About Me I'm a React Native developer and full stack developer who builds mobile app development projects end-to-end, pairing React and Vue.js front-ends with Node.js, MongoDB, and SQL on the backend across 60+ shipped projects. I work with founders building their first MVP and with businesses scaling an existing React Native mobile app to more users across 2 or more markets, with 5 clients so far expanding into a 3rd country within 12 months of launch. Clients hire me as a React Native engineer when they need a store-ready app built with React Native Expo or the bare workflow, or when they want React Native Firebase features — authentication, push notifications, crash analytics — done right the first time across all 6 core modules. Others need a React Native full stack developer who can also own the Node.js and MongoDB backend instead of stopping at the frontend, or a React Native UI UX specialist who can add React Native animation that feels genuinely native rather than a web page in a shell. A growing number simply need help finding their first 1,000 or 10,000 real customers once the React Native mobile app is live, and I stay involved for that stage too, typically for another 2-5 months post-launch. 🛠️ Tools, Technologies & Industries I work daily with React Native, React Native Expo, React Native Firebase (Auth, Firestore, Push, Admob), Redux, and native modules, shipping to both the App Store and Google Play across roughly 8 releases a year.