Favour E.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Sep 25, 2026.

Want to build a mobile app that actually ships on time, on budget, and engineered to last? 📌 20+ Successfully Delivered Projects in Mobile App Development and Product Development 💪 Over 5 years of experience in Android, iOS Development, and Web Development ✅ 100% Job Success | Rated 5.0 by 15+ Clients ⭐️ I’m Favour Etunwoke, a Top Rated Upwork mobile, web, and automation engineer helping startups, founders, coaches, consultants, and service businesses build production-ready apps, web platforms, APIs, CRM systems, and workflow automations. I specialise in Flutter, React Native, React, Firebase, API integrations, n8n, GoHighLevel, Zapier, and AI-powered automation. My focus is straightforward: to build reliable digital products and business systems that help clients save time, enhance operations, and launch more efficiently. Core Expertise ✅ Flutter & Dart Cross-platform iOS & Android apps ✅ React.js / Next.js: High-performance web applications ✅ Node.js / REST APIs: Backend architecture & data flow ✅ App Store & Play Store Publishing: Compliance, ASO, metadata optimisation ✅ Authentication & Security: Firebase, AWS Cognito, GDPR-compliant systems ✅ AI & Image Recognition: OCR, ChatGPT, and third-party API integrations ✅ Debugging & Performance Tuning: Crash-free launches, smooth UX Track Record ✅ Led engineering teams of 8+ devs, shipping complex fintech and e-commerce platforms on time ✅ Architected systems handling 2000+ concurrent users with zero downtime ✅ Published production apps with ASO strategies that boosted organic rankings and discoverability ✅ Integrated advanced APIs (Solana blockchain, ChatGPT, inventory systems) for secure, real-time data ✅ Delivered Flutter apps with 90% code reuse, achieving native-like performance across iOS & Android Why clients work with me: • Top Rated on Upwork with 100% Job Success • 4.9-star client rating across completed projects • Experience building apps and platforms used by real users • Strong understanding of both product engineering and business automation • Clear communication, structured delivery, and practical technical decisions • Ability to handle frontend, backend, APIs, deployment, and automation workflows What You Get ✅ A mobile app built to scale, not just launch ✅ ASO-optimised App Store listings that rank higher and drive downloads ✅ Daily progress updates (Slack/email) so you're never left guessing ✅ Clean, maintainable code your future team can work with ✅ Launch-ready apps with security audits, crash-free performance, and full compliance I take on a limited number of projects at a time to give every client my full focus. If you're building something real and need a senior engineer who can own it from end to end, let's talk. Send me a message with your project idea, and I'll give you a straight assessment within 24 hours. Mobile App Development | Mobile Application Developer | Flutter App Developer | Flutter Developer | Flutter & Supabase | Flutter & Dart | Flutter Stack Development | Cross-Platform Mobile Development | iOS App Development | Android App Development | React Native Developer | React Native App Development | Native Mobile Apps | Swift | SwiftUI | Kotlin | SDK Development | Apple HealthKit | Apple Watch Application Development | Android Smartphone Apps | UI/UX Design | App Design | Responsive App UI | Figma to App | Pixel-Perfect Flutter UI | API Integration | REST API Development | GraphQL | Database Architecture | Backend Integration | Laravel + Flutter | Supabase + Flutter | Node.js | Full Stack Development | Web App + Mobile App Integration | SaaS App Development | App Marketplace Development | Social Media App Development | Dating App Development | On-Demand App Development | Food Delivery Application Development | Travel App Development | EdTech Platform Development | Enterprise App Development | QA Testing | Manual Testing | Automated Testing | App Debugging & Optimization | Version Control (Git/GitHub) | Mobile App Maintenance | Website Maintenance | SEO | App Store Optimization (ASO) | App Ranking Optimization | App Store & Play Store Submission | Localization & Multilingual Apps | HIPAA Compliance | Secure Authentication | Business Applications Development | API Development | ChatGPT API Integration | ChatGPT Prompts | AI-Powered Apps | AI Speech-to-Text | AI Text-to-Image | AI App Development | AI Marketplace | Artificial Intelligence | Machine Learning Integrations | Health Coaching Apps | Nutrition Tracker Apps | Blockchain Development | Solana | NFT Marketplace Development | Web3 Applications | Copyright & IP Management | Finance & Banking Applications | Asset Management Systems | SaaS Startups | MVP Development | Startup Company Solutions | Enterprise Software Development | Sports Apps | Health & Fitness Apps | Transportation Apps | eCommerce Mobile App | Social Networking Service | Social Networking Development | UI/UX Strategy | HTML | CSS | Firebase | AWS | Supabase | App Performance