l o a d i n g

Senior iOS Developer for Swift Based Mobile Application Build

Nov 11, 2025 - Senior

$100,000.00 Fixed

We are looking for a highly skilled iOS Developer with strong expertise in Swift, modern app architecture, and Apple’s developer ecosystem. The goal is to build a polished, reliable, and performance optimized iOS application that meets Apple’s quality guidelines and delivers an exceptional user experience.


You will be responsible for building the entire iOS app including UI screens, navigation flows, backend API integration, local storage, push notifications, device permissions, and App Store deployment. The project will require strong knowledge of UIKit or SwiftUI, MVVM architecture, concurrency, and secure data handling. Experience with animations, transitions, and micro interactions will be a major advantage.


You will collaborate with our design and backend teams to translate Figma layouts into pixel accurate views and connect them to real data through well structured API services. Stability, performance, and clean code are top priorities. The ideal developer understands the challenges of real world mobile development such as managing memory efficiently, handling offline scenarios, preventing crashes, supporting multiple device sizes, and ensuring smooth UI performance.


If you take pride in building elegant mobile experiences that feel native and refined, and you understand how to ship production ready apps that pass App Store review without issues, this project is perfect for you.


✅ KEY RESPONSIBILITIES


Build a complete iOS application using Swift


Develop UI and navigation flows using UIKit or SwiftUI


Integrate REST APIs with secure async data handling


Implement MVVM or a clean modular architecture


Create smooth animations and transitions where required


Manage local storage with Core Data or User Defaults


Configure push notifications using Firebase or APNs


Handle device permissions for camera, location, storage and notifications


Optimize performance with profiling tools


Debug crashes and monitor stability throughout the project


Ensure full responsiveness across all iPhone sizes


Prepare TestFlight builds and App Store submissions


Collaborate with design and backend teams


Write documentation for setup and deployment


Deliver reliable updates and weekly progress reports


✅ REQUIRED SKILLS


Strong knowledge of Swift and Xcode


Experience with UIKit or SwiftUI


Expertise in MVVM architecture


Skill in integrating REST APIs using URLSession or third party tools


Strong understanding of concurrency using async await


Experience with Core Data or Realm for storage


Familiarity with Firebase services


Ability to debug using Xcode Instruments


Knowledge of Auto Layout and adaptive UI


Understanding of Apple Human Interface Guidelines


Experience submitting apps to the App Store


Strong problem solving and communication skills


Commitment to clean, maintainable code


Ability to work independently and deliver on time


Portfolio of at least two published iOS apps


✅ TOOLS AND TECHNOLOGIES


Swift and Xcode latest stable version


SwiftUI or UIKit based on project needs


URLSession or Alamofire


Firebase and APNs


Core Data, Realm or SQLite


Instruments for profiling


GitHub or GitLab


TestFlight for distribution


Postman for API testing


✅ DETAILED TECHNICAL BREAKDOWN

Core Competencies


The app should follow a clean, modular file structure with reusable components, minimal duplicated logic, and clearly separated business and UI layers. The navigation flow should be predictable, smooth, and optimized for user experience.


Technical Workflow


Convert Figma user interface into native Swift components


Set up MVVM structure with separate view models


Implement API services and error handling


Add local caching for faster load times


Integrate push notifications and user authentication


Test on multiple devices and OS versions


Prepare TestFlight builds for internal review


Best Practices


Use async await for clean asynchronous logic


Write type safe models for API responses


Use keychain for sensitive data


Apply Auto Layout carefully to avoid UI breaks


Test with real devices to confirm smooth performance


Simple Code Example

func loadUserProfile(token: String) async -> UserData {

    let url = URL(string: baseUrl + userEndpoint)!

    var request = URLRequest(url: url)

    request.setValue("Bearer \(token)", forHTTPHeaderField: "Authorization")

    let result = try? await URLSession.shared.data(for: request)

    guard let data = result?.0 else { return UserData.empty }

    return try? JSONDecoder().decode(UserData.self, from: data) ?? UserData.empty

}


✅ SERVICE TYPES AND SPECIALIZATIONS


Full iOS application development


SwiftUI or UIKit based UI creation


API integration and data modeling


Offline first mobile architecture


Push notification setup


App Store submission support


Long term updates and maintenance retainer


✅ DELIVERABLES


Complete iOS app with all requested features


UI implemented with pixel accuracy


API integrated and fully tested


Authentication system


Push notification configuration


Local storage setup


Documentation for architecture and setup


Two revision cycles


Post launch support for two to four weeks


✅ BUDGET OPTIONS


Hourly rate: 40 to 100 dollars


Project based: 5000 to 25000 dollars


Monthly retainer: 2500 to 9000 dollars


✅ TIMELINE


Requirements and architecture planning: 5 to 7 days


UI development: 2 to 4 weeks


Feature integration and API setup: 1 to 2 weeks


Debugging and performance tuning: 1 week


TestFlight and App Store launch: 4 to 7 days


Timeline depends on feature count and design complexity.


✅ SUCCESS METRICS AND KPIs


Smooth navigation and animations with no stutter


App load time under two seconds


Crash free performance above ninety eight percent


Clean UI matching Figma designs


Zero App Store rejections


Positive user reviews after launch


Low memory usage on mid range devices


✅ CALL TO ACTION


If you are an experienced iOS Developer who can deliver a polished, high performance mobile app with clean architecture and smooth user experience, we encourage you to send your proposal.

Include your portfolio, previous iOS projects, your development approach, and your estimated timeline and pricing.


We respond to qualified proposals within twenty four hours.

  • Proposal: 0
  • More than 3 month
AuthorImg
Ralph Schenck Inactive
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Member since
Nov 11, 2025
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