You will get Legacy iOS Modernization - Objective-C/UIKit to Swift/SwiftUI
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Project details
Is your iOS app stuck on old UIKit or Objective-C — slow to update, painful to maintain, and holding your roadmap back? I modernize it to clean, future-proof Swift and SwiftUI.
I'm a senior iOS engineer with 14+ years shipping apps across health, fitness, streaming and finance. I recently took a live production app from 14,700 lines of Objective-C to 24,851 lines of Swift — 30 screens, 157 files, an 82-scene Storyboard fully removed, 100% Swift at the end.
How I work: I migrate incrementally, screen by screen. Your app keeps building and running at every step — no risky all-at-once rewrite, no long broken period. You get clean MVVM, a focused service layer with async/await, and UIKit bridges only where they make sense.
Every project starts with an audit and a fixed-price roadmap, so you know the scope, the risks, and the cost before any code is written. Heavy business-logic screens are scoped separately — no surprises later.
You get: 100% Swift, full source code, tests on critical flows, and a walkthrough of the new architecture so your team can build on it.
Send me your repo or a design and I'll tell you honestly how I'd approach it.
I'm a senior iOS engineer with 14+ years shipping apps across health, fitness, streaming and finance. I recently took a live production app from 14,700 lines of Objective-C to 24,851 lines of Swift — 30 screens, 157 files, an 82-scene Storyboard fully removed, 100% Swift at the end.
How I work: I migrate incrementally, screen by screen. Your app keeps building and running at every step — no risky all-at-once rewrite, no long broken period. You get clean MVVM, a focused service layer with async/await, and UIKit bridges only where they make sense.
Every project starts with an audit and a fixed-price roadmap, so you know the scope, the risks, and the cost before any code is written. Heavy business-logic screens are scoped separately — no surprises later.
You get: 100% Swift, full source code, tests on critical flows, and a walkthrough of the new architecture so your team can build on it.
Send me your repo or a design and I'll tell you honestly how I'd approach it.
Platform
iOSApp Type
Native AppDevelopment Technology
Swift, Objective-CApp Purpose
Chat, Finance, Health & Fitness, Maps & Navigation, Productivity, Social NetworkingExpertise
Localization, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$299
|
Standard
$1,999
|
Advanced
$4,999
|
|---|---|---|---|
| Delivery Time | 3 days | 14 days | 30 days |
Number of Revisions | 1 | 2 | 3 |
App Store Upload | - | - | |
Source Code | - |
Optional add-ons
You can add these on the next page.
Additional Revision
+$249
Extended Test Coverage
(+ 2 Days)
+$799
Performance Fix
(+ 2 Days)
+$599Frequently asked questions
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Need help developing a macOS application (MVP).
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Fix and Finish Vibecode iOS App
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iOS Engineering and rapid prototyping
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Zainab G.
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iOS Engineering Support
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Vasiliy M.
Oct 31, 2023
Senior iOS developer needed for AI chatbot app
Mikhail is a professional who completed the work quickly, efficiently, and honestly. Highly recommended.
About Mikhail
Senior iOS Engineer | Swift, SwiftUI, UIKit | Mobile Apps
100%
Job Success
Batumi, Georgia - 10:59 pm local time
From MVPs to large legacy codebases, I help startups and product teams ship reliable mobile products — architecture, implementation, App Store releases, and technical ownership.
Built a fitness app used by 2.7M people, a real-time streaming platform supporting 30,000 concurrent viewers, and AI-powered health products using HealthKit and OpenAI.
I’m a Senior iOS Engineer with 14+ years of experience building native iOS and macOS apps with Swift, SwiftUI, UIKit, and Objective-C.
Recent work:
• Built the core health logic for an AI coach using HealthKit, OpenAI function calling, vector search, and custom health scoring.
• Implemented 60 FPS pose detection for real-time workout feedback.
• Built a macOS meeting assistant with system audio capture, Whisper transcription, AI summaries, and action items.
• Built live sports features including predictions, polls, leaderboards, live stats, and video calls for broadcasts with 30,000 concurrent viewers.
• Migrated large Objective-C/UIKit codebases to Swift and SwiftUI while keeping regular production releases.
I can help with:
• Native iOS development in Swift, SwiftUI, UIKit, and Objective-C
• Modernizing legacy iOS applications and improving architecture
• AI integration: OpenAI, function calling, streaming, Whisper, vector search, and on-device ML
• HealthKit, Apple Watch, fitness, and wellness apps
• Camera, audio, video, AVFoundation, and real-time processing
• StoreKit 2, RevenueCat, subscriptions, and paywalls
• Firebase, Supabase, REST APIs, and GraphQL
• Performance optimization, crash fixing, and App Store releases
Send me a short description of your project, and I’ll suggest a practical first milestone.
Steps for completing your project
After purchasing the project, send requirements so Mikhail can start the project.
Delivery time starts when Mikhail receives requirements from you.
Mikhail works on your project following the steps below.
Revisions may occur after the delivery date.
Audit & migration roadmap
I review the codebase, map every screen by complexity, and give you a fixed-price plan. Heavy business-logic screens are scoped separately so there are no surprises later.
Incremental migration
Screen by screen, UIKit/Objective-C to modern Swift and SwiftUI. Your app keeps building and running throughout the migration, avoiding a risky full rewrite.