Machine Learning Testing Jobs in California (NOW HIRING)

As a Machine Learning Engineer, you will design and build cutting-edge AI/ML systems that drive meaningful business outcomes at scale. You will work cross-functionally to bring innovative machine learning solutions from research and experimentation through to robust, production-grade deployment.
Description
The MLE will collaborate with other MLEs to build scalable, production-ready ML solutions, taking algorithms from initial concept through to deployment. This hire will design end-to-end AI/ML solutions with clear business impact, from concept to deployment, with a strong focus on feasibility, scalability, and performance. You will benchmark, adapt, and integrate AI/ML models into existing systems.","responsibilities":"Deploy, monitor, and support AI tools in production environments, ensuring reliability and performance.
Contribute to the ongoing improvement of ML infrastructure, tooling, and best practices.
Partner with data scientists, and engineers to translate business requirements into technical ML solutions.
Conduct rigorous model evaluation, testing, and iteration to continuously improve model quality and efficiency.
Design and integrate LLM-powered features and AI agent workflows into production systems, ensuring reliability, scalability, and performance.
Build and maintain agentic pipelines that leverage tool use, memory, and multi-step reasoning to automate complex business processes.
Evaluate and benchmark LLM outputs as part of the model evaluation lifecycle, assessing quality, latency, and safety in production contexts.
Preferred Qualifications
10 years of related experience building high-throughput, scalable applications or machine learning models in a production environment.
Solid understanding of ML fundamentals including supervised/unsupervised learning, model evaluation, and feature engineering.
Strong problem-solving skills with the ability to translate ambiguous business problems into well-defined ML solutions.
Excellent cross-functional communication skills with the ability to collaborate effectively across engineering and data science teams.
Familiarity with LLM evaluation practices including output quality assessment, hallucination detection, and latency benchmarking in production environments.
Minimum Qualifications
8 years of related experience building high-throughput, scalable applications or machine learning models in a production environment.
Bachelor's Degree in Computer Science, Statistics, Data Mining, Machine Learning, Operations Research, or related field.
Proficiency in one or more object-oriented programming languages such as Python, Java, or C++, with hands-on experience building distributed systems.
Experience building large-scale machine learning systems using big data technologies such as Spark, SQL, Snowflake, or similar platforms.
Experience with ML frameworks such as TensorFlow, PyTorch, or scikit-learn.
Familiarity with MLOps practices including model versioning, CI/CD pipelines, and experiment tracking tools such as MLflow or similar.
Experience building and deploying applications using large language models (e.g., GPT-4, Claude, Gemini, or open-source alternatives) via APIs or self-hosted inference.
Hands-on experience with agentic frameworks such as LangChain, LlamaIndex, or AutoGen to build multi-step, tool-augmented AI workflows.
Pay & Benefits
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 $212,000 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.