Viktor H.

I’m a Senior iOS Developer with 14 years of experience building and maintaining native iOS applications with Swift, SwiftUI, UIKit, and Objective-C. I’ve worked on products used by millions of users, complex real-time applications, streaming and video features, hardware-connected apps, fintech/crypto products, and long-term production codebases. I can take ownership of an iOS project — from architecture and implementation to App Store release, maintenance, and technical decisions. What I bring • 14 years of professional iOS development experience • Senior-level Swift and SwiftUI development • Strong UIKit and Objective-C experience for existing and legacy codebases • Experience working on an iOS product with 5M+ active users • Performance optimization with measurable improvements • Experience taking applications from initial development through production support • Comfortable working independently or as part of a product/engineering team Core expertise • Swift, SwiftUI, UIKit, Objective-C • Swift Concurrency, async/await, actors, Sendable, Swift 6 • MVVM, VIPER, Clean Architecture and modular architecture • Swift Package Manager • REST and GraphQL APIs • URLSession, Alamofire and networking architecture • CI/CD and App Store releases • CoreBluetooth / BLE and hardware integration • AVFoundation, video, audio and streaming • RTMP, real-time communication, chat and video calls • Crypto and financial APIs • Performance optimization, debugging and production issue investigation I’m also comfortable using modern AI tools as part of my development workflow — for research, code generation, refactoring, debugging and repetitive engineering tasks. I use them as productivity tools while keeping architecture, code quality, security and technical decisions under human control. I can help with • Building a new iOS application from scratch • Developing new features in an existing production app • SwiftUI and UIKit development • Modernizing and refactoring legacy iOS code • Swift / Swift 6 concurrency migrations • Architecture and technical decisions • Performance optimization and difficult bugs • API and third-party SDK integrations • Streaming, video, audio and real-time features • Bluetooth and hardware-connected applications • App Store submission and production support • Long-term iOS development and technical ownership Whether you need someone to build a new product, take over an existing codebase, solve a difficult technical problem, or provide long-term iOS development, I can work independently and take responsibility for the technical side of the project. If you have an existing app or a new idea, send me a short description of the project and what you need help with. I’ll be happy to discuss the technical approach and suggest a practical first step.