Anton R.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.

I build and ship mobile products that make money - and I've done it at every scale, from startup MVPs to an in-app marketplace serving 50M+ users at Goodnotes. What I can do for you: 📱 iOS development, end to end. 19 years in mobile, 12+ shipping iOS. Swift, SwiftUI, UIKit - from architecture to App Store release. I built the Goodnotes marketplace (50M+ users, +13% sales growth), instant payments at Santander (1M+ users), and passed security review for 20+ Volvo apps. 💳 Monetization that works. In-app purchases, StoreKit, subscriptions, Stripe, paywalls, payment flows - this is my deepest specialty. If your app needs to earn, I've solved your problem before, at scale, with finance-grade reliability. 🤖 GenAI integration, in production - not demos. At my current AI startup I lead a 12-person team: we ship an AI video platform (100K+ videos generated) integrating ElevenLabs, Whisper, and multi-provider image/video models. I also build AI-assisted development workflows that made our team 3x faster - I can set one up for yours. 🧭 Fractional tech lead. Need someone to own your mobile architecture, unblock your team, set up code review and release processes? I've led teams for years without ever leaving the code. How I work: clear scope, honest estimates, working software every week, and communication that doesn't need chasing. Based in Warsaw (CET), fluent English and Polish, comfortable with EU and US time zones. If you need an iOS app built right, a monetization flow that converts, or AI features that actually ship - send me a message and let's talk through your project.