Senior Software Engineer (iOS)

Quick Facts

• Role: Senior Software Engineer (iOS)

• Focus: Swift/SwiftUI iOS development with growing Kotlin Multiplatform shared logic

Description

This role builds and maintains scalable, high-performance iOS applications while extending a shared Kotlin Multiplatform layer consumed via a shared framework. You will lead iOS architecture using The Composable Architecture (TCA) and a modular Swift Package Manager codebase, integrate GraphQL and REST data, and champion mobile security, performance, accessibility, and overall app quality. You will also shape the Swift-facing API of the shared KMP layer in collaboration with Android and backend teams.

Responsibilities

• Lead design, development, and maintenance of scalable iOS apps using Swift, SwiftUI, and Xcode

• Work hands-on in the Kotlin Multiplatform shared layer (UseCases, repositories, models)

• Collaborate with Android and backend engineers to define the Swift-facing API and multiplatform strategy

• Integrate and maintain GraphQL (Apollo Kotlin) and REST (Ktor) data layer, including caching and iOS bridging

• Champion mobile security (OAuth2/PKCE, CIAM, Keychain, certificate pinning, jailbreak detection, F5 protection), accessibility, and performance

• Lead code reviews, mentoring, refactoring, and complex troubleshooting across the Swift↔Kotlin boundary

• Support CI/CD and release pipelines (Bitrise, fastlane, Danger, match, TestFlight)

• Drive best practices with clean modular architecture plus unit and UI testing (XCTest, XCUITest)

• Stay current with emerging iOS and Kotlin Multiplatform technologies and share knowledge across teams

• Mentor junior and mid-level developers and contribute to technical planning and long-term mobile strategy

Requirements

• Expert knowledge of Swift, SwiftUI, and the Xcode ecosystem (UIKit familiarity for interop is a plus)

• Enthusiasm for Kotlin Multiplatform and contributing to shared Kotlin (direct KMP experience is a strong advantage; ability to learn quickly is essential)

• Strong experience with state-driven architecture using TCA (or similar unidirectional patterns such as MVVM/MVI)

• Experience with modular codebases and dependency management via Swift Package Manager

• Experience with Swift Concurrency (async/await)

• Proven experience integrating GraphQL and REST APIs, SDKs, and third-party platforms

• Strong knowledge of mobile security, performance optimization, and accessibility

• Ability to lead technical discussions, mentor, and drive engineering best practices

• Excellent problem-solving and attention to detail; strong cross-functional collaboration

• Excellent English skills (written and spoken)

Benefits

• Competitive salary range: 20,000–28,000 PLN gross per month (employment contract)

• Private medical healthcare at LUXMED (including dental care) for you and your family

• Medicover sports card (Fit&More)

• Employer-financed life insurance

• 30-minute lunch break included in the 8-hour working day

• Training and Buddy programme

• Wellbeing programme

• Co-financing of monthly public transport tickets in Kraków

• Home office option and comfortable office environment

• Language/accounting courses, LinkedIn Learning access, and possible co-financing of studies and certifications

• Employee referral programme