Global Siri Engineer, Mexican Spanish

Lex; Barcelona; On-site; EUR 120,000 - 180,000; Full time

Job summary

Apple in Barcelona seeks an engineer to shape Siri for Mexican Spanish users. You will operate at the intersection of Machine Learning, Data, and Software Engineering, leading large-scale ML and GenAI initiatives and collaborating with teams across Apple to ensure native experiences for Mexican customers.

The role requires strong ML/NLP fluency, extensive software design and production-grade coding, and the ability to work with data at scale, building end-to-end solutions and evaluating models

Qualifications

• Professional-level fluency in Mexican Spanish.
• Experience applying machine learning and NLP techniques to deliver products with solid ML concepts.
• Strong skills in software design and programming across different paradigms, including testing and maintainability, with experience contributing to large production code bases.
• Experience working with data at scale, including building or curating datasets, analyzing results, and making data-driven decisions.

Responsibilities

• Design and implement large-scale ML and GenAI solutions advancing customer experience.
• Lead work streams to design and implement ML/GenAI initiatives for the Mexican Spanish market.
• Collaborate with partner teams across Apple to ensure native experiences for Mexican users.

Skills

ML concepts

Software design

Data at scale

Data-driven decisions

Testing and maintainability

Education

MS or PhD in Computer Science or related field

Tools

Python

Swift

Objective-C

C++

C

Apple platforms

Job description

Summary

Play a part in the next revolution of machine learning technology! Siri assists hundreds of millions of people, in dozens of languages, every day, and Global Siri is the team that teaches Siri each one of them.

We own the product end-to-end, from Speech Recognition and Natural Language Understanding through to Response. We are looking for an engineer with deep expertise in either Machine Learning or Software Engineering, and practical working knowledge of the other, to shape the future of Siri for Mexican Spanish users.

Your work will range across multiple disciplines, including employing advanced Large Language Models (LLMs), adopting models for global markets, running data experiments, and engineering scalable software to deliver highly personalized, culturally relevant experiences for our customers.

Description

As a member of our dynamic and fast-paced group, you will play a key role in crafting innovative, end-to-end solutions that delight millions of customers across the globe. You will act as the technical anchor for the Mexican Spanish market, leading work streams to design and implement large-scale ML and GenAI solutions that advance our customer experience.

This position sits squarely at the intersection of Machine Learning, Data, and Software Engineering. Whether you are a strong Software Engineer who has applied ML to production systems, or an ML expert with solid coding skills, you will leverage large language models (LLMs), agentic approaches to tasks, and data generation methods to build real-world systems.

You will work with partner teams across Apple, sharing your expertise and bringing architectural proposals that account for international market nuances, so that Siri feels genuinely native to Mexican users.

Join us as we build the foundation of Siri AI for users around the world!

Minimum Qualifications

• Professional-level fluency in Mexican Spanish, with deep familiarity with the culture and idiom of Mexico or other Spanish-speaking regions.
• Experience in applying machine learning and NLP techniques to deliver products, with a solid understanding of ML concepts
• Strong skills in software design and programming across different paradigms, including testing and maintainability, with experience contributing to large production code bases.
• Experience working with data at scale, including building or curating datasets, analyzing results, and making data-driven decisions.

Preferred Qualifications

• Hands-on experience with large language models: fine-tuning, prompt and context engineering, evaluation, and inference optimization, including agentic systems, tool calling, or retrieval-augmented generation.
• Experience with speech technologies such as ASR, TTS, or pronunciation modeling.
• Experience adapting models or products across languages and markets — multilingual and cross-lingual modeling, transfer learning, or low-resource settings.
• Ability to formulate a research problem, design, experiment, implement and communicate solutions.
• Product focus with a strong emphasis on end-user experience.
• Experience writing software in Python, Swift, Objective-C, C++ or C; experience on Apple platforms preferred.
• M.S, Ph.D. in Computer Science or a related field, or equivalent practical experience.

At Apple, we’re not all the same. And that’s our greatest strength. We draw on the differences in who we are, what we’ve experienced, and how we think. Because to create products that serve everyone, we believe in including everyone. Therefore, we are committed to treating all applicants fairly and equally. We will work with applicants to make any reasonable accommodations.

At Apple, we believe accessibility is a fundamental human right. You’ll find that idea reflected in everything here — in our culture, our benefits and our digital tools. By welcoming as many perspectives as possible, we help you build a career where you feel like you belong.

Learn about accessibility in Apple’s workplace

Role Number: 200680115-0215