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Konstantin Ir

@konstantinir

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I build and modernize iOS apps, improving build speed, reliability, and delivery across fintech and streaming.

Spain

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What I'm looking for

I'm looking to build and scale native mobile products where I can modernize architecture, improve reliability and delivery speed, mentor engineers, and apply AI-assisted development workflows.

At Start, I redesign authentication, payment, settings, and deep-linking modules for a streaming platform, modularizing legacy code into Swift Packages to reduce build times and crash rates. I also introduced Claude Code and AI-assisted code review to speed up reviews and improve code quality.

Previously at Uzum, I cut build time by 25%, helped launch a partner-service app that increased new-user acquisition by 15%, and made new deep links about 75% faster to implement. I've also built apps from scratch, integrated Stripe and Apple Pay, set up CI/CD pipelines, mentored 50+ junior iOS developers, and delivered marketplace and banking products through App Store release.

Experience

Work history, roles, and key accomplishments

Current

Senior iOS Developer

Current

Start

Jul 2024 - Present (2 years 2 months)

Redesigned authentication, payment, and settings modules and modularized legacy functionality into independent Swift Packages, cutting build times and crash rates. Introduced Claude Code and AI-assisted code review to improve code quality and accelerate review turnaround.

Swift SwiftUI UIKit Combine Async Await Swift Package Manager CI CD Claude Code AI Assisted Code Review

iOS Developer

Uzum

Jun 2022 - Jun 2024 (2 years)

Reduced project build time by 25% by extracting a legacy chat module into an independent package via Swift Package Manager. Launched a new partner-service application that grew new user acquisition by 15% and redesigned deep-link routing, cutting implementation time by ~75%.

Swift Swift Package Manager Deep Linking Architecture Caching Data Migration

iOS Developer

Hotel Group

Jun 2022 - Apr 2023 (10 months)

Built an iOS application from the ground up, selecting architecture and tech stack for rapid iteration. Integrated Stripe, Apple Pay, custom Google Maps clustering, and custom UI animations, and set up CI/CD pipelines accelerating the development-testing-bug fix cycle by 60%.

iOS Swift Stripe Apple Pay Google Maps CI CD UI Animation

iOS Developer / Mentor

Andersen Lab

Feb 2020 - Jun 2022 (2 years 4 months)

Trained and mentored 50+ junior iOS developers, designing a proprietary training methodology that increased client interview pass rates by 20%. Delivered a marketplace-style iOS app from concept to App Store release in under 3 months and developed an iOS app with a design system for a major regional bank.

iOS Swift Mentorship Training Design Systems Accessibility UI Component Sandbox

iOS / Flutter Developer

IT Megastar

Jan 2018 - Feb 2020 (2 years 1 month)

Built and maintained multiple iOS applications end-to-end using Swift and Flutter. Migrated project architecture from MVC to MVVM, reducing bug-fix turnaround time by 50%.

Swift Flutter Dart MVVM MVC