Polished Apple apps, built with craft.

Teledermatology / personal health platform — AI skin analysis, prescription-based treatments, diagnosis and progress tracking (US market).

Swift 6, SwiftUI, UIKit, Clean Architecture, MVVM + Coordinator, Factory DI, Apollo GraphQL, Apple Vision, AVFoundation, Core Graphics / Core Image, Firebase / Firestore, Amplitude, Braze

• Built a real-time on-device AI skin analysis pipeline (Apple Vision) that renders results over the live camera feed within seconds.
• Engineered a quality-gating triage: anomaly scoring, head-pose angle validation, and hair-occlusion detection to reject bad frames before analysis.
• Implemented GPU-accelerated lesion rendering (Core Graphics + Core Image, shared CIContext, offscreen rendering) — dozens of color-coded lesions with no frame drops.
• Designed progressive result delivery over Server-Sent Events (~35 DTOs across 5 analysis blocks) merged incrementally on actors.
• Led the My Plans v2 Subscriptions/Cadences feature end-to-end (single PR: 144 commits, 165 files, +10,800 lines).
• As Squad Lead: owned technical direction, code review, and delivery for the iOS squad while staying hands-on.

Node.js, Express, React, React Native, RTK Query, Redux

• Delivered features end-to-end: payments, geolocation tracking, push notifications.
• Led the React Native project's technical direction while staying hands-on.
• Ran delivery on Scrum/Kanban; communicated directly with clients on scope and progress.
• Estimated cross-platform React Native and native iOS projects.
• Set up CI/CD pipelines for Android and iOS together with the DevOps team.
• Started the team's first Flutter projects.

Swift, UIKit, Alamofire, Kingfisher, Moya, Crashlytics, Firebase, VIPER

• Shipped features for a product serving 1.5M+ monthly active users.
• Optimized Firebase Analytics, Remote Config, and Realtime Database usage.
• Stabilized a legacy codebase and improved app performance.

Fintech application that helps employees receive their salary before payday (Kyiv, Ukraine).

Swift, Objective-C, Alamofire, Moya, ObjectMapper, Firebase, Remote Config, Google Analytics

• Maintained the existing project and developed new features.
• Connected to third-party APIs and integrated third-party services.

Launched 3 products from scratch and joined a 4th as an additional developer, owning web and mobile architecture in direct collaboration with clients, business, and QA (Kyiv Region, Ukraine).

ReactJS, Redux, Recompose, Reselect, Redux-Saga, Redux-Thunk, redux-offline, React Native, Serverless (AWS Lambda, DynamoDB, S3), GraphQL, REST API, Ramda

• Web (React) and mobile (React Native) learning platform with text/video/survey content, mentor and peer chat, and offline mode.
• React Native hearing-test app with screens ordered and customized dynamically from backend API responses.
• React Native app for a large logistics company built around background geolocation tracking, plus push notifications, offline mode, file upload/download, map view, and multi-language support.
• Marketplace app (joined as additional developer) for finding health professionals and fitness instructors by location, built on AWS Elasticsearch, Lambda, Cognito, API Gateway, and DynamoDB.

Frontend engineering on a betting platform product.

React, JavaScript