Senior iOS Engineer - Fintech Platform (m/f/n)

InPost Pay is building its own fintech platform from the ground up, a large-scale international initiative focused on creating core fintech components and solutions at scale. The engineering organization is lean, highly effective, and AI-native based in Poland, preferring a hybrid working model with one day per week in the Warsaw or Cracow office.

• At least 5 years of experience in native iOS engineering, including production applications published through the App Store.
• At least 4 years of experience working with Swift and SwiftUI and/or UIKit.
• At least 3 years of experience with iOS testing using XCTest and XCUITest.
• Strong knowledge of Swift 5.x, including Swift Concurrency, async/await, Actors, and Combine.
• Production-level experience with SwiftUI and UIKit, including an understanding of their rendering lifecycles.
• Knowledge of Clean Architecture, MVVM, and/or MVI, with a strong understanding of module and layer boundaries.
• Experience with Swift Package Manager and/or CocoaPods.
• Understanding of dependency inversion and designing code for testability.
• Experience with Core Data, SwiftData, and Keychain Services.
• Knowledge of URLSession, certificate pinning, and structured error handling.
• Experience profiling iOS applications with Instruments.
• Experience with Fastlane, Xcode Cloud, or equivalent CI/CD solutions, including automated signing.
• Ability to read and work with Objective-C in legacy systems and third-party SDK integrations.
• Experience integrating feature flags and structured events at the mobile layer.
• English at a minimum B2 level.
• A university degree in Information Technology, Computer Science, or a related field.

Nice to have:

• At least 2 years of experience in FinTech or regulated mobile application development.
• Experience integrating Apple Pay or PassKit.
• Experience with modular iOS architecture at a multi-framework or monorepo scale.
• Knowledge of App Clips.
• Experience implementing WCAG or Apple accessibility standards in production applications.
• Familiarity with Swift macros and SwiftUI preview tooling at scale.

• Own the architecture of a production FinTech iOS application, including layered architectural patterns, module boundaries, and dependency structure.
• Develop and maintain native iOS solutions using Swift, SwiftUI, and UIKit.
• Implement concurrency and reactive application flows using async/await, Actors, and Combine.
• Work with local persistence and security solutions such as Core Data, SwiftData, and Keychain Services.
• Contribute throughout the full development lifecycle, including PRD authorship, specification writing, testing, feature-flagged releases, and structured event emission.
• Build and maintain automated tests using XCTest and XCUITest.
• Profile and improve application performance using Instruments, including Time Profiler, Allocations, Leaks, and Core Animation.
• Maintain a zero-regression approach through production crash monitoring with tools such as Crashlytics.
• Develop and maintain CI/CD automation using Fastlane, Xcode Cloud, or equivalent solutions.
• Own integrations between native and web-based experiences, including WKWebView, universal links, deep linking, and handoff.
• Co-own the team backlog with Engineering and Product Managers, bringing iOS constraints and native solution proposals into requirement shaping.
• Collaborate with backend engineers on API contracts, authentication flows, and event schemas.
• Participate in production incident support and post-mortem activities when required.