Staff Machine Learning Engineer, Gen AI Remote Spain

The Mozilla Corporation is a subsidiary of the non-profit Mozilla Foundation, a 501(c)(3) organization. This means we are driven solely by our mission, free from shareholder influence.

We collaborate with thousands of volunteer contributors and collaborators worldwide to design, build, and distribute open-source software that empowers people to control their online experience. About this role: Responsibilities:

• Lead the development of Generative AI solutions for Firefox, working closely with product management, full-stack engineering, and design teams.
• Create infrastructure for training and inference of Large Language Models (LLMs) and small language and vision models for web and mobile Firefox experiences.
• Implement robust validation and testing procedures to ensure model generalizability and reliability.
• Continuously monitor and optimize deployed models for performance and efficiency. Requirements:
• 6+ years of experience as a Machine Learning engineer with expertise in building tooling and services for machine learning applications in production.
• Familiarity with designing and building machine learning tooling and infrastructure for training, deploying, inference, and validation of models.
• Experience with distributed systems and platforms for AI integrations across various applications, including LLM APIs, cloud-based, and open-source tooling.
• Proven ability to lead architecture designs to execution independently and drive team velocity in AI development.
• Strong problem-solving skills and effective communication of complex concepts to technical and non-technical stakeholders.
• Collaboration experience with product managers, project managers, and other non-engineering teams.
• Excellent documentation and communication skills within a distributed team environment.
• Alignment with Mozilla’s values:
• Relationship-minded
• Grit

Bonus Points:

• Familiarity with using LLM solutions across different cloud providers.
• Track record of developing and deploying multiple projects with active user bases.
• Experience with responsible AI, transparent algorithms, and prioritizing user needs.
• Exceptional communication skills, both written and presentation-based, with the ability to distill complex topics for various audiences.
• A commitment to lifelong learning and professional growth.
• Experience working in open-source environments. What you’ll get:
• Performance-based bonus plans tied to individual and team success.
• Comprehensive medical, dental, and vision coverage.
• Generous retirement contributions with immediate vesting.
• Quarterly all-company wellness days.
• Country-specific holidays plus a personal day off for your birthday.
• A one-time home office stipend.
• A quarterly well-being stipend.
• Considerable paid parental leave.
• An employee referral bonus program.
• Other benefits vary by country. About Mozilla:

Mozilla exists to create an open and free internet accessible to everyone. When you work with us, you have the opportunity to make a difference in the lives of web users worldwide and contribute to creating a better world every day. Commitment to diversity, equity, inclusion, and belonging:

Mozilla values diverse creative practices and forms of knowledge as essential to its core mission. We encourage applications from everyone, recognizing the importance of equity-seeking communities, such as women, racialized and Indigenous persons, persons with disabilities, LGBTQ+ individuals, and others.

We are an equal opportunity employer, committed to eliminating discrimination based on race, religion, gender, gender identity, color, national origin, ancestry, disability, sexual orientation, age, genetic information, marital status, citizenship status, military or veteran status, or any other characteristic protected by applicable laws.