Take part in bringing the best possible Siri to as many users and use cases as possible. As a Language Expansion Engineer, you’ll have the opportunity to have end-to-end ownership for the development of Siri for multiple locales, from voice, to language, to character— you will be a central point of contact, synthesizing and guiding the contributions of all relevant teams and contributors. You'll develop workflows and frameworks for building, fine-tuning, optimizing ML models for text processing, acoustic, and natural language generation models. You'll utilize a suite of tools to efficiently analyze errors and systemic issues impacting Siri in all locales. Lastly, you'll implement your ideas directly in our TTS engine in production. Hundreds of millions of users will experience your contributions through more natural and expressive Siri on Apple products.