iOS Developer (Senior)

Quality & Reliability S.A. (QnR); Kentucky; On-site; USD 100,000 - 150,000; Full time

Job summary

Quality and Reliability (QnR) is seeking a Senior iOS Developer to own the full development lifecycle of iOS apps, from architecture to deployment, collaborating with product managers, designers, backend engineers and QA.

You will design scalable architectures, mentor peers, write tests, optimize performance, and stay current with iOS frameworks and App Store processes. Strong English communication is essential.

Qualifications

• 4+ years of iOS development experience.
• Proficient with SwiftUI and/or UIKit, Combine and async/await.
• Experience integrating RESTful APIs with iOS apps.
• Familiarity with Core Data, Core Animation, URLSession.
• Knowledge of App Store submission and release workflows.
• Strong English communication.

Responsibilities

• Design, develop and maintain iOS applications.
• Collaborate with product managers and designers to translate requirements.
• Mentor other developers and review code.
• Write unit and UI tests to ensure quality.
• Optimize performance, memory usage, and battery life.
• Stay up-to-date with iOS releases and guidelines.

Skills

iOS development

SwiftUI / UIKit

Combine & concurrency

RESTful APIs

Unit/UI testing

Git CI/CD

Tools

Git

Fastlane

Bitrise

GitHub Actions

Xcode

Job description

Quality and Reliability (QnR) is a leading Technology Group, with more than 30 years of presence in the market, delivering mission-critical digital transformation across Greece, Europe, and the broader EMEA region. QnR is an Athens Stock Exchange-listed technology Group currently undergoing a period of significant growth and transformation, having completed five acquisitions within the last 18 months.

Role overview

We are looking for a Senior iOS Developer to take ownership of the full development lifecycle of iOS applications, from architecture and design to implementation, testing and deployment. You will collaborate closely with product managers, designers, backend engineers and QA.

The ideal candidate will be responsible for:

• Designing, developing and maintaining iOS applications
• Collaborating with product managers and designers to translate requirements into high-quality features
• Designing scalable, maintainable architectures and mentoring other developers
• Writing unit and UI tests to ensure code quality, reliability, and long-term maintainability
• Optimizing application performance, memory usage, battery consumption, and overall responsiveness
• Staying up to date with the latest iOS releases, frameworks and Apple Human Interface Guidelines

To excel in this role, you'll need:

• At least 4 years of experience in iOS development
• Solid experience with SwiftUI and / or UIKit, Combine and modern concurrency (async/await)
• Experience integrating RESTful APIs with iOS applications
• Deep understanding of iOS frameworks such as Core Data, Core Animation, Foundation, and URLSession
• Hands-on experience with version control (Git), CI/CD pipelines (Fastlane, Bitrise, GitHub Actions, or similar)
• Familiarity with automated testing frameworks (XCTest, XCUITest) and a test-driven mindset
• Solid understanding of the App Store submission process, code signing and release workflows
• Strong communication skills in English