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Oryna S.
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Oryna S.

Expert iOS & Android Dev | Swift/Kotlin/Flutter | Generative AI Leader

Building a mobile app and want to get it right from day one? You’re in the right place. 📩 If you’re serious about building a high-quality mobile product - book your free consultation in DM. I can review your idea, suggest the best approach, and provide a clear estimate within 24 hours. I’m a senior mobile app developer with 8+ years of experience helping startups and businesses design, build, and launch scalable mobile products without wasting time or budget on the wrong decisions. I’ve worked on 20+ projects, including MVPs, production apps, and scaling existing products used by real customers. 🚀 What you get working with me: Product-focused development (not just code execution) Smart tech decisions that save time and budget Clean, scalable architecture ready for growth Clear communication and predictable delivery 💡 My expertise: 📱 Native iOS & Android - Swift, Kotlin 📱 Cross-platform - Flutter, React Native ⚙️ Backend & APIs - Firebase, AWS, REST API 🎨 UI/UX collaboration - Figma, Sketch I don’t push specific technologies. I choose what fits your product, timeline, and business goals. 🎯 How I can help: MVP strategy & fast validation (launch in weeks, not months) Full-cycle product development (idea → App Store / Google Play) Scaling and optimizing existing apps Architecture & backend integration Fixing unstable apps and improving performance 🌍 I work best with: Funded startups Founders building MVPs Businesses scaling existing products 🤝 My approach: I work as a product partner, not just a developer - helping you prioritize features, avoid costly mistakes, and move faster toward a successful launch. Mobile App Development, iOS Development, Android Development, Cross-Platform Development, Flutter Development, Kotlin Development, Swift Development, Java Development, Software Development Agency, Full-Cycle Development, MVP Development, Product Development, App Maintenance, Software Consulting, Agile Development, API Integration, Backend Development, Cloud-Based Solutions, SaaS Development, UI/UX Design, HealthTech App Development, FinTech App Development, EdTech Solutions, E-commerce Mobile Apps, Social Media Apps, IoT Mobile Development, AI-Powered Apps, Accessibility Solutions, GPS & Location-Based Apps, Mobile Security & Encryption, REST API, Firebase, Google Cloud, AWS, BLE (Bluetooth Low Energy), Custom UI Development, Mobile App Security, Payment Gateway Integration, AI & Machine Learning, AR/VR

🇺🇦Kropyvnytskyi, Ukraine$60/hr100% JSS5.00 (15)Since Jun 2017

Earnings and projects

MRR
$651

Last 6 months ÷ 6

World#66,828 / 412k
🇺🇦Country#2,719 / 14.3k
Revenue, last 30 days
$0

Last 6 months: $3.9k

Total earnings
$92k

Billed in all: $93k

World#42,789 / 412k
🇺🇦Country#2,825 / 14.3k
Per project
$3.8k

$3.9k in the last 6 months

World#44,649 / 412k
🇺🇦Country#2,554 / 14.3k
Projects, last 6 months
1
100% fixed0% hourly
World#128,096 / 412k
🇺🇦Country#4,718 / 14.3k
Projects in all
24

Across 26 contracts

42% fixed58% hourly
World#116,632 / 412k
🇺🇦Country#5,020 / 14.3k

Earnings, last 30 days

$92.7kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$91k$92k$93k$94kOct 9Oct 24Nov 8

Skill rankings: Top 14% in Android

Ranked by MRR among everyone on Upwork with the skill.

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  8. #467Kotlin3,021 freelancers · 🇺🇦 #41Top 15%