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December 17, 2025

Senior iOS Developer

Senior • Remote

$90 - $135/

Warsaw, Poland

Project description: 

You will join a fast-paced, cross-functional team building next-generation direct-to-consumer (D2C) iOS applications with a focus on high performance, elegant design, and seamless user experience.The project involves creating a scalable, production-grade mobile app that leverages device hardware, messaging capabilities, and AI-assisted development workflows to deliver cutting-edge functionality to end users.


Tech stack:

  • Languages & Frameworks: Swift, SwiftUI, AVFoundation, Core Motion

  • Dependency Management: CocoaPods, (plus familiarity with Carthage or Swift Package Manager is a plus)

  • CI/CD Tools: Fastlane, Jenkins, Bitrise

  • Version Control: GitHub (Git Flow, code reviews)

  • APIs & Authentication: REST, OAuth, JWT, biometrics

  • Messaging & Realtime: WebSocket, Firebase, XMPP

  • Analytics & Integrations: Segment, HighTouch, Rudderstack

  • AI Tools: GitHub Copilot, ChatGPT

  • Testing: XCTest, Quick/Nimble

  • Monitoring: Firebase Crashlytics, New Relic


Requirements:

  • Minimum 5 years of experience in iOS app development using Swift and SwiftUI

  • Proven track record of delivering consumer-facing (D2C) iOS applications — portfolio or App Store links required

  • Solid understanding of App Store deployment processes, including provisioning profiles and TestFlight distribution

  • Strong UI/UX sensibility and ability to design intuitive, visually appealing mobile interfaces

  • Hands-on experience with hardware integrations (camera, microphone) and real-time messaging systems

  • Strong knowledge of RESTful API integration and authentication flows (OAuth, JWT, biometrics)

  • Experience working in agile teams using tools like JIRA, Trello, or Asana

  • Familiarity with CI/CD for mobile applications (Fastlane, Jenkins, Bitrise)

  • Excellent problem-solving skills and ability to work independently and proactively

  • Experience writing and executing unit tests to ensure code quality

Nice to have:

  • Experience integrating React Native or Flutter into native iOS applications

  • Knowledge of CDP platforms (Segment, Rudderstack, HighTouch)

  • Familiarity with Objective-C, Carthage, or Swift Package Manager

  • Understanding of mobile app security (certificate pinning, secure data storage)

  • Experience building healthcare or HIPAA-compliant mobile applications



Main responsibilities:

  • Design and develop robust, scalable iOS applications using Swift and SwiftUI

  • Lead end-to-end App Store deployment, including TestFlight, provisioning, and troubleshooting

  • Drive UI/UX improvements, ensuring mobile-first, accessible, and aesthetically refined experiences

  • Implement real-time messaging and notification features using modern communication frameworks

  • Integrate device hardware features such as camera and microphone using AVFoundation and Core Motion

  • Connect applications to RESTful APIs and secure user authentication systems

  • Set up and maintain CI/CD pipelines to streamline delivery and testing

  • Collaborate in a small agile team environment, participating in code reviews and sprint planning

  • Leverage AI tools like GitHub Copilot or ChatGPT to enhance productivity, debugging, and prototyping

  • Ensure quality and reliability through automated testing and continuous integration