iOS Engineer

About Lingo

Lingo is building a cuttingedge digital health platform that fuses continuous biosensor data, highperformance backend engineering, and advanced analytics to help people live healthier, longer, fuller lives. Our iOS app is a critical part of that experience, connecting to biosensors, presenting data and trends intuitively, and meeting high standards for quality, reliability, and auditability in regulated environments.

THE OPPORTUNITY

We’re seeking an iOS Engineer to join our highly capable iOS team as we scale our product and meet growing regulatory requirements. This junior-to-mid level role uniquely combines feature development with a strong focus on automated testing and quality assurance. You’ll help us strengthen our test automation strategy to support compliance, ensuring reliability, traceability, and quality across the codebase while collaborating on new functionality, shared modules, and architectural improvements. You’ll work in a modern SwiftUI codebase with Swift Concurrency, modular architecture, and a strong emphasis on clean, testable design.

What You’ll Do

• Implement product features endtoend in SwiftUI, turning designs and requirements into polished user experiences.
• Collaborate with Product, Design, and QA in an Agile environment to clarify requirements, identify edge cases, and break work into deliverables.
• Contribute to Lingo’s automated testing framework by designing and maintaining unit, integration, and UI tests.
• Improve and maintain reusable components, architectural patterns, and developer workflows for greater efficiency and consistency.
• Investigate and resolve defects in both production and test environments.
• Participate in peer code reviews to ensure high standards of code quality, reliability, and maintainability.
• Support compliance requirements through thorough documentation, traceable test results, and alignment with regulatory guidelines.
  
  

Required Qualifications

• Core Swift fundamentals (value types, protocols, generics) and prior iOS development experience shipping code.
• Experience building SwiftUI interfaces (composition, state management, NavigationStack, accessibility basics).
• Understanding of Swift Concurrency basics (async/await; familiarity with actor-based code).
• Proven ability to write and maintain tests, including unit and integration tests.
• Git and CI familiarity for managing pull requests, troubleshooting build/test failures, and iterating quickly.
• Experience with persistence/database management (SwiftData or SQLite).
• Familiarity with dependency injection patterns for testable code.
  
  

Preferred Qualifications

• Experience with Swift Package Manager in modular architectures.
• Knowledge of advanced persistence patterns (repositories/providers) with SwiftData or Core Data.
• Snapshot testing and/or BDD UI testing experience.
• Familiarity with observability tooling for application monitoring.
• Understanding of basic security practices (data-at-rest protection, encryption concepts).
• Experience with background tasks in iOS (BGTaskScheduler, reachability monitoring).
• Knowledge of unidirectional state management (Redux/TCA-style : actions, reducers, stores, side effects).
  
  

LINGO CULTURE

Our Culture Compass guides everything : Customer First, Quality, Growth, Unity. As a Senior Backend Engineer, you’ll ensure data quality and trust underpin every product decision and customer experience we deliver.