Senior iOS Software Engineer

Duolingo is on a mission to develop the best education in the world and make it universally available. The Senior iOS Software Engineer will collaborate on software projects, develop and maintain native iOS applications, and mentor junior engineers while working on the Video Call Experience team.

Responsibilities:

• Collaborate on software projects with product design and backend aspects
• Develop, release, and maintain native iOS applications, primarily in Swift
• Mentor and set technical direction for junior engineers across the company

Requirements:

• A Bachelor's degree in Computer Science or a related technical field
• A solid foundation in computer science with strong competencies in data structures, algorithms, and software design
• Programming experience in Swift
• Strong proficiency in Swift, with proven ability to build and maintain production-level applications
• Strong technical knowledge of iOS mobile application development for iPhone/iPad using Swift with Cocoa Touch and related frameworks
• Experience designing clean and maintainable APIs
• Experience with multithreaded programming
• Experience writing unit tests and testable code
• Knowledge of iOS SDK performance tools and optimization techniques