Senior iOS Software Engineer

Duolingo is on a mission to develop the best education in the world and make it universally available. As a Senior iOS Software Engineer, you will build features for the core learning experience on Duolingo, focusing on enhancing short-form lessons to improve learner engagement and effectiveness.

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