Swift LLM API Engineer

Cupertino, California, United States Machine Learning and AI

Join the Swift AI Frameworks team and create the best APIs for AI models. You’ll collaborate with passionate and creative colleagues to meet ambitious goals in an environment that not only encourages, but requires constant curiosity and growth.

As a member of the Swift AI Frameworks team, you will implement new features in the Foundation Models framework and craft elegant APIs that surprise and delight our developers. You will be responsible for bringing your ideas to life through all stages of their development: from initial research, to API design, to model evaluation, to testing and development in Swift, to documentation and internal dogfooding.

You’ll join us in energetic discussions of each other’s work and ideas, alongside collaborators possessing a variety of different perspectives and domain expertises. You’ll also have the opportunity to collaborate with experts throughout Apple including: ML researchers, systems engineers, user interface designers, tools engineers, and technical writers. Curious and enterprising individuals who take an expansive view of their role will thrive in this multi-disciplinary environment!

• Interest in machine learning, LLMs and generative AI
• Proficiency with Swift (or the capacity to become proficient quickly)
• The ability to work collaboratively and explain complex ideas clearly
• High standards for quality and attention to detail
• The desire to learn and grow, keeping pace with cutting edge technologies
• Experience with at least one of the following:
  Framework and API development, LLM tool calling and agentic workflows, Model evaluation, LLM inference algorithms (e.g. constrained decoding, retrieval-augmented generation)

• Bachelorʼs Degree in Computer Science or equivalent experience
• Experience with any of the following is a plus, but not required: LLM serving, On-device ML systems, Multi-modal LLMs, Swift API design patterns, User interface technologies (e.g. Swift
  
  UI, UIKit), Programming language design and implementation, Technical writing and Open-source software projects

At Apple, base pay is one part of our total compensation package and is determined within a range. This provides the opportunity to progress as you grow and develop within a role. The base pay range for this role is between $181,100 and $318,400, and your base pay will depend on your skills, qualifications, experience, and location.

Apple employees also have the opportunity to become an Apple shareholder through participation in Apple’s discretionary employee stock programs. Apple employees are eligible for discretionary restricted stock unit awards, and can purchase Apple stock at a discount if voluntarily participating in Apple’s Employee Stock Purchase Plan. You’ll also receive benefits including:
Comprehensive medical and dental coverage, retirement benefits, a range of discounted products and free services, and for formal education related to advancing your career at Apple, reimbursement for certain educational expenses — including tuition. Additionally, this role might be eligible for discretionary bonuses or commission payments as well as relocation. Learn more about Apple Benefits.

Note:

Apple benefit, compensation and employee stock programs are subject to eligibility requirements and other terms of the applicable plan or program.

Apple is an equal opportunity employer that is committed to inclusion and diversity. We seek to promote equal opportunity for all applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, Veteran status, or other legally protected characteristics. Learn more about your EEO rights as an applicant .

Apple accepts applications to this posting on an ongoing basis.