Sviatoslav B.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 Nov 5, 2026.

✅ Developed apps with over 𝟏𝟎𝟎,𝟎𝟎𝟎+ monthly active users. ✅ A startup gained early adopters for their MVP using TestFlight ✅ A product company increased its user base by 𝟐𝟓% by scaling its app onto a new platform. ✅ A services company grew its profits by 𝟓𝟓%, thanks to an iOS streaming app. 𝐏𝐫𝐨𝐝𝐮𝐜𝐭-𝐨𝐫𝐢𝐞𝐧𝐭𝐞𝐝 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 who knows how to write the code and functionality that converts product users. I care about the app's architecture, clean code, product design, continuous integration, task prioritization, and automatic deployment. 🌟 𝐂𝐥𝐢𝐞𝐧𝐭 𝐒𝐮𝐜𝐜𝐞𝐬𝐬 𝐒𝐭𝐨𝐫𝐢𝐞𝐬: Everything was done quickly and efficiently. Sviatoslav handled the task excellently, demonstrating deep knowledge and promptness. I recommend him as an excellent mobile developer. - ⭐⭐⭐⭐⭐ Matt | Founder One of the most impressive aspects of Sviatoslav's work is his commitment to quality. He consistently collaborated with our team and paid great attention to user experience. His ability to optimize app performance and ensure compliance with design guidelines and coding standards was commendable. Additionally, his documentation throughout the app's lifecycle added to the transparency of the project - ⭐⭐⭐⭐⭐ Eduard B. | CEO Sviatoslav's efforts have improved app stability, reduced bug reports and crashes, sped up app load times, and increased positive user feedback. He has responded to the client's concerns and proactively solved problems. His commitment to quality and care for UX has been impressive. - ⭐⭐⭐⭐⭐ Anastasiya C. | Founder 𝐌𝐲 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬: 📱 𝟏𝟎 𝐲𝐞𝐚𝐫𝐬 of experience in mobile development ☄️ MVP | MLP | Startup Launch | Product Growth Consulting 🧠 Working using Agile Methodology 💻 𝐇𝐞𝐫𝐞 𝐢𝐬 𝐭𝐡𝐞 𝐭𝐞𝐜𝐡 𝐬𝐭𝐚𝐜𝐤 𝐈 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡: - Swift & Objective-C for iOS; - Java & Kotlin for Android; - Flutter and React Native for hybrid apps. 𝐖𝐡𝐨 𝐈 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡: 🚀 Startups – take your idea through the startup lifecycle within a reasonable budget and timeline. 🙋 Small and Medium Businesses – acquire software excellence to boost your current product. ►► 𝐇𝐀𝐕𝐄 𝐐𝐔𝐄𝐒𝐓𝐈𝐎𝐍𝐒? 𝐈𝐍𝐕𝐈𝐓𝐄 𝐌𝐄 𝐀𝐍𝐃 𝐀𝐒𝐊!◄◄ Mobile app development | iOS app development | Android app development | React Native app development | Flutter app development | Swift app development | Kotlin app development | Objective-C app development | Dart app development | Cross-platform app development | Native app development | Hybrid app development | Mobile app design | App performance optimization | Feature integration | UI/UX for mobile apps | App scalability | Mobile app marketing | App Store Optimization (ASO) | App launch strategy | Mobile user acquisition | App campaign management | In-app marketing strategies | App promotion | App retention strategies | App store visibility | Ad campaigns for mobile apps | App analytics | User engagement for mobile apps | App growth hacking | Full-cycle mobile app development and marketing | Mobile app development and launch strategy | End-to-end mobile app development and promotion | Mobile app design and ASO | App development and user acquisition | App performance optimization and marketing | Cross-platform app development and marketing | Mobile app development with ASO and user engagement | Custom mobile app development and marketing strategies | Mobile app development and growth marketing | Mobile app UX/UI design and app store optimization | App development and analytics for mobile growth | Firebase integration | AWS mobile services | Push notifications | API integration | Mobile backend integration