Sergey G.
Mobile App Development | Flutter App Developer | FlutterFlow, iOS
I built the most popular Flutter app with FlutterFlow support worldwide - 𝐀𝐁.𝐌𝐎𝐍𝐄𝐘: 𝟏𝐤 𝐭𝐨 𝟏𝐌 𝐮𝐬𝐞𝐫𝐬 𝐢𝐧 𝟒 𝐲𝐞𝐚𝐫𝐬, #1 in App Store (Education)! Want the same results? I am here for you! Message me and claim your 🔥 𝐅𝐑𝐄𝐄 𝟑𝟎-𝐦𝐢𝐧𝐮𝐭𝐞 𝐬𝐭𝐫𝐚𝐭𝐞𝐠𝐲 𝐬𝐞𝐬𝐬𝐢𝐨𝐧 🔥 to discuss your vision and our approach! 𝐒𝐤𝐢𝐥𝐥𝐬 & 𝐍𝐢𝐜𝐡𝐞𝐬: - Ultra-fast MVPs with Flutter & FlutterFlow - Firebase & Supabase backend for rapid scale - UX/UI Design built around user retention - Testing, QA, App Store & Google Play deployment - Experience with AI-powered logic & chatbots - Niches: FinTech, HealthTech, EdTech, HR, Media 🚀 𝐖𝐡𝐨 𝐈 𝐀𝐦: CTO with over 100 mobile apps launched. #1 spots hit on App Store & Google Play. Winner of LCT Hackathons, AI Developer of the Year by AI OLIM 2025. This is all about me! 𝐖𝐡𝐞𝐧 𝐈 𝐬𝐭𝐞𝐩 𝐢𝐧, 𝐭𝐡𝐢𝐧𝐠𝐬 𝐦𝐨𝐯𝐞! 𝐓𝐨𝐩 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬: • Cake School - From 1K to 150K users in 2 years - Full cycle: UX, code, App Store launch - broke even in year 1! • IT.BRAIN - 4.7 on App Store, 5.0 on Google Store with 40% user retention - Full cycle: UX, code, store launch ⭐⭐⭐⭐⭐ "After wasting time & money with other devs, I found this team. On our first call, I knew they were pros. We’re already building our third app together!" 𝘼𝙡𝙚𝙣𝙖 𝙎𝙖𝙠𝙝𝙖𝙧𝙤𝙫𝙖, 𝘾𝙖𝙠𝙚 𝙎𝙘𝙝𝙤𝙤𝙡 & 𝙈𝙮 𝘾𝙖𝙠𝙚 𝐖𝐡𝐲 𝐌𝐞: - Weekly reports + real-time dashboards (Telegram + YouGile) - Fixed-price contracts with sprint-based payments - Full transparency, NDA, Agile methodology 💥 𝐍𝐎 𝐌𝐎𝐑𝐄 𝐓𝐀𝐋𝐊! 𝐋𝐞𝐭'𝐬 𝐬𝐭𝐚𝐫𝐭 𝐛𝐮𝐢𝐥𝐝𝐢𝐧𝐠! Need a project in a couple of months - drop me a message and let's wait no more! 📌Expertise & Tags: Mobile Dev & Cross-Platform: Flutter, FlutterFlow, Dart, iOS App Development, Android App Development, Mobile App Development, Web App Development, Cross-Platform Development, Rapid Application Development, Prototyping, MVP Development, Scalable Architecture, High-performance Applications, Load Balancing, Database Design UX/UI & Design: UI/UX Design, Figma, User Interface Design, User Experience Design, User-centric Design, Interactive Learning, Content Delivery, Personalization, Community Engagement Business & Monetization: Business Process Automatization, Hypotheses Testing, Monetization, LTV Optimization, Subscription Models, Order Management, Secure Transactions, Wallet Management, Financial Service Integrations, Digital Transformation, Startup App Development Development & Management: Agile Development, Sprint Development, Smart Development Method, App Testing, QA, App Publishing, App Deployment, Post-Launch Support, Maintenance, Roadmap Creation, Bottleneck Analysis, Functionality Optimization, Cost Estimation, Time Estimation, Transparent Project Management, Client Collaboration, NDA Industry Experience: Educational Apps, Wellness Apps, Lifestyle Apps, CRM Systems, Cryptocurrency Apps, Sports Apps, Online Course Platforms, E-commerce
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $1.4k
Billed in all: $32,994$33k
$1.4k in the last 6 months
Earnings, last 30 days
Skill rankings: Top 21% in Android
Ranked by MRR among everyone on Upwork with the skill.
- #14Android Smartphone50 freelancers · 🇦🇪 #2Top 28%🇦🇪#2 of 4
- #46iPhone & iPad Apps174 freelancers · 🇦🇪 #1Top 26%🇦🇪#1 of 1
- #48Hybrid App183 freelancers · 🇦🇪 #1Top 26%🇦🇪#1 of 2
- #58Mobile Development Framework242 freelancers · 🇦🇪 #1Top 24%🇦🇪#1 of 4
- #118Flutter Stack470 freelancers · 🇦🇪 #2Top 25%🇦🇪#2 of 3
- #156Mobile App Bug Fix453 freelancers · 🇦🇪 #2Top 34%🇦🇪#2 of 5
- #181Android App776 freelancers · 🇦🇪 #2Top 23%🇦🇪#2 of 4
- #202Mobile App Redesign693 freelancers · 🇦🇪 #2Top 29%🇦🇪#2 of 12