I'm Vitalii — a Senior iOS Developer with 7+ years shipping elegant, high-performance apps in Swift, SwiftUI, TCA and Combine. Modular architecture. Complex async flows. AI-driven features.
About
I specialize in modular app design, complex async flows, GraphQL and WebSocket integrations, and AI-driven features such as content-generation agents and intelligent chat systems.
I've independently delivered full end-to-end iOS solutions — from architecture and feature development to optimization, analytics, and app stability. Focused on clean architecture, performance, and seamless user experiences.
How I can help
End-to-end delivery from architecture to App Store — SwiftUI, TCA, MVVM, modular design.
Chat interfaces, content-generation agents, WebSocket streams, GraphQL integrations.
UIKit → SwiftUI migrations, Objective-C bridging, concurrency refactors, performance tuning.
Toolkit
Experience
DataArt
Led architecture and delivery of complex iOS products end-to-end. Collaborated with stakeholders on requirements, estimation, and scalable solutions. Built with SwiftUI, Swift Concurrency, CoreData/SwiftData, Fastlane, Sockets, StoreKit, MapKit, Core Bluetooth. Published apps on the App Store.
ABNK Premium Systems
Delivered features end-to-end and shipped apps to the App Store. MVVM, UIKit, RxSwift, Firebase, GooglePlaces, Fastlane, AppsFlyer, Push Notifications, XCUnitTests.
ANODA Software Development Agency
Shipped clean, spec-driven features and communicated directly with customers. MVVM, UIKit, SnapKit, RxSwift, Moya, Alamofire, CoreData, GoogleMaps.
Coral Media
Bootstrapped iOS projects from scratch.
Interactive portfolio
Filter by platform and work type to see the most relevant cases.
Swift 6 · SwiftUI · Firebase · Jetpack Compose
Client-side app of the Helply marketplace, shipped from scratch to the App Store on iOS and ported to Android with Jetpack Compose. Built the full onboarding and localized catalog, service requests with a map picker, bidding with contact reveal, one-step reviews, wallet and promo codes, chat, and push notifications with deep links.
Swift 6 · SwiftUI · Firebase · Jetpack Compose
Pro-side app of the Helply marketplace, built with feature parity to the Android client. Covers the performer feed, bidding with paid reveals on HT-token holds, earnings wallet and history, force-update gate, Telegram linking, and 4-language localization (ru/bg/uk/en) with UGC translation. Migrated to Swift 6 and shipped through App Store review.
SwiftUI · Figma · AI Agent · CI/CD
Senior iOS engineer in a 24-person mobile team (12 iOS, 12 Android) building a high-scale betting platform. Shipped a Figma-integrated design system with an automated color-theme generator that cut brand onboarding from one month to 40 hours. Built the “Refer a Friend” acquisition flow, an in-app AI agent for navigation and personalized recommendations, and reusable AI skills. Wrote CI scripts and acted as release-duty engineer, owning App Store submissions.
SwiftUI · Combine · GraphQL · Async/Await
Modular architecture (Domain, Services, Infrastructure, UI) with Coordinator + MVVM. AI chat supporting text, images, and interactive cards. Service layer built on async/await with pagination and state restoration.
SwiftUI · TCA · WebSockets · AI APIs
Multiple AI agents for automatic content generation (video, titles, descriptions) in TCA + SwiftUI. Shared SharedAgentKit, full video processing pipeline, and reliable state machines.
SwiftUI · MVVM+Coordinator · Apollo GraphQL
40+ screens for a crypto wallet and virtual cards. 70+ GraphQL queries/mutations. Face ID/Touch ID, PIN, 2FA, OTP. Encrypted Keychain, session lock, screenshot protection, Fastlane.
UIKit · SignalR · Combine
Realtime dashboard with streaming quotes via SignalR/WebSockets. Table rendering optimization, snapshot diffing, resilience to network disconnects.
Swift Package · Clean Architecture
Internal SPM framework: DI container, network layer, persistence (CoreData/SwiftData), navigation via Coordinator. Reduced new feature bootstrapping time by 3×.
SwiftUI · Core Bluetooth · HealthKit
Integration with a medical device over Core Bluetooth: characteristic parsing, reconnect, background mode, sync with HealthKit and the backend.
Intro
A short hello before the code — who I am, what I ship, and when I can start.
Let's talk
Open to Senior iOS roles, contracts, and freelance projects. Based in Sofia, Bulgaria — available worldwide, remote or on-site.