I'm Ivan Oparin — a Senior iOS Developer and technical lead with a passion for building robust, modern iOS applications and exploring innovative product experiences. My background spans large-scale e-commerce, healthtech, fintech, ed-tech, food-tech and advanced UTXO blockchain R&D.
- 📍 Digital nomad
- 📧 treetop-margins-5c@icloud.com | LinkedIn
- 🎓 Education: BSc in Informatics and Computer Engineering, MSTUCA; Business Informatics coursework (7 semesters), RANEPA
- 🧩 Core Open Source Contributions: Swift Relux architectural library and ecosystem co-author and core maintainer
- Wildberries — Senior iOS Developer, contributing to the iOS app for the largest online retailer in the CIS.
- Unitea Inc — iOS Tech Lead, delivered a modern SwiftUI/UDF app and advanced AR integrations.
- SKL.vc — Senior iOS Developer. Shipped EasyGrocer (iOS), Artific (iOS), and Translaitor (macOS) apps.
- Darwell Inc — Senior iOS Developer, built camera-based health monitoring apps with SwiftUI & UDF.
- Kaller Communications — iOS Developer, focused on early exploration of high-performance SwiftUI + UDF library.
- Bitcoin Wallet — Blockchain Integration Architect, R&D on cryptographic protocols for privacy in Bitcoin wallets.
- Languages: Swift, Objective-C, Go, C, C++
- Frameworks: SwiftUI, UIKit, AVFoundation, FoundationModels, TensorFlow, CoreML
- Libraries: Swift Algorithms, Swift Collections, os.log
- Tools: Xcode, Xcodegen, Tuist, Xcode Cloud, Fastlane, Gitlab/Github Actions, Terminal, Console, Figma, Sketch
- Swift Relux: Core maintainer/contributor and co-author to a Flux/Redux-like library for SwiftUI (Unidirectional Data Flow).
- SUINavigation: UIKit-grade navigation to SwiftUI: custom configurable navigation bar, clean api, no NavigationStack bullshit.
- Wildberries: iOS development for the largest e-commerce platform in Russia and CIS. (2024–2025)
- Unitea: Large-scale, TikTok-like app for music fans in the USA. (2023–2024)
- EasyGrocer: Feature-rich grocery shopping app for the UAE market. (2025)
- Artific: AI character communications for fun and entertainment. (2024)
- Translaitor: Cross-platform real-time language interpreter app. (2024)
- FlowVit: Remote rPPG health monitoring for B2B health insurance companies. (2021–2022)
- Darwell: Personal well-being assessment and coaching app (iOS). (2022–2023)
- BreatheWell: Customizable breathwork and HRV monitoring (iOS). (2022–2023)
- Squallenge: Automatic squat recognition and fitness tracking (iOS). (2022–2023)
- Bitcoin/Ethereum wallet: Early adopter of Swift for secure blockchain apps. (2017–2018)
- Turn And Learn: Pioneer in iOS ed-tech (2011–2013).
📝 Blog posts and dev notes:
- Using Git Worktree for Parallel Branch Development
- Manually Download & Install Xcode Simulator Runtimes
- Override macOS Metal “VRAM” Cap on Apple Silicon for Local LLMs
- Innovative Bitcoin User-Experience With Billion Wallet for iPhone 2018-02-12
- How BIP47 Reusable Payment Codes enrich Bitcoin and overall cryptocurrency user-experience 2018-01-18
- What are the properties of a true Bitcoin wallet? 2018-04-06
- The First Thread — depicting the moment of divergence in perception of Bitcoin evolution 2018-04-18