Petros 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.

✅ Expert-Vetted ✅ Decade of Experience at Apple, Top Tech Firms & Private Clients ✅ Specialist in High-Performance Graphics & iOS ✅ 100% Job Success Rate I solve the complex visual and performance challenges that typical app developers can't. My expertise is writing the deep-level code, using technologies like the Metal API and custom shaders, that transforms standard apps into incredibly fluid, responsive, and visually polished user experiences. If your app feels clunky or you need visuals that stand out, I can help. My core services include: Graphics & Performance Engineering I go beyond standard frameworks to deliver exceptional performance and visuals. This includes writing custom shaders, direct programming with Apple's Metal API for maximum control, performance profiling, and memory optimization to ensure your app runs flawlessly at 60/120 FPS. Technical Architecture & System Design My experience at Apple taught me how to design robust, simple, and scalable systems. While I specialize in iOS, these architectural principles are framework-agnostic. I can analyze your existing tooling, diagnose slowdowns, and architect solutions to complex engineering problems on any platform. End-to-End iOS Product Development From initial concept to a 5-star app on the App Store, I have the product-focused mindset to manage and deliver a complete, high-quality project. I don't just build features; I build products that users love.