Senior iOS Engineer – Growth & Retention

Sword; Portugal; On-site; EUR 50,000 - 79,000; Full time

Job summary

Sword is looking for an iOS Engineer in Consumer Growth to craft experiences that reveal value in our consumer products and encourage ongoing engagement. You’ll work across onboarding, subscriptions, and activation, collaborating with Product, Design, Data, Marketing, and backend teams to transform growth hypotheses into polished iOS features.

You’ll blend strong native engineering with thoughtful product decisions, enabling rapid progress while upholding quality and user trust across devices

Qualifications

• Experience shipping and maintaining production iOS applications.
• Strong proficiency in Swift and SwiftUI for UI development.
• Solid understanding of iOS lifecycle, state management and concurrency.
• Experience integrating APIs and handling complex user journeys.
• Experience with automated testing, debugging, memory management and performance analysis.
• Ability to use product data to inform engineering decisions and instrument journeys.
• Strong product judgment, accessibility focus and cross-disciplinary collaboration.
• Practical experience applying AI in engineering workflows and reviewing outputs.
• Fluent English, both written and spoken.

Responsibilities

• Build and improve iOS experiences across onboarding, account creation, paywalls, subscriptions, and engagement.
• Connect acquisition campaigns and web journeys to in-app experiences using Universal Links.
• Implement subscription flows, restoration, and entitlement handling with backend teams.
• Deliver experiments with feature flags and accurate analytics instrumentation.
• Collaborate with Product, Design and Data to identify friction and evaluate results.
• Create reusable UI components and foundations to accelerate experimentation.
• Maintain app responsiveness, accessibility, and stability across devices and iOS versions.
• Own features end-to-end from concept through production, testing, and release.
• Leverage AI tools to accelerate development while maintaining engineering quality.

Skills

Swift

SwiftUI

iOS Architecture

Swift concurrency

Automated testing

Analytics instrumentation

Accessibility

UIKit interoperability

Tools

StoreKit

RevenueCat

A/B testing

Job description

Sword is looking for an iOS Engineer in Consumer Growth to craft experiences that reveal value in our consumer products and encourage ongoing engagement. You’ll work across onboarding, subscriptions, and activation, collaborating with Product, Design, Data, Marketing, and backend teams to transform growth hypotheses into polished iOS features.

You’ll blend strong native engineering with thoughtful product decisions, enabling rapid progress while upholding quality and user trust across devices