Intern - AI Engineering

About the role

We are Lennar

Lennar is one of the nation's leading homebuilders, dedicated to making an impact and creating an extraordinary experience for their Homeowners, Communities, and Associates.

We build quality homes and provide exceptional customer service, giving back to the communities in which we work and live in, and fostering a culture of opportunity and growth for our Associates throughout their career.

Lennar has been recognized as a Fortune 500® company and consistently ranked among the top homebuilders in the United States.

What is the "Future Builders" program?

Lennar's Future Builders Program is designed for highly motivated early career professionals seeking to launch their careers. Participants will develop essential interpersonal and technical skills while working alongside seasoned professionals in a collaborative and inclusive workplace culture.

Through structured onboarding, hands-on training, and professional development, Future Builders will contribute to impactful projects and gain deep exposure to key areas across Lennar. High-performing participants may have the opportunity to transition into our recent college graduate (RCG) program or other entry-level roles after the summer.

The Technology track is a 10 weeklong program during the summer that prepares participants for careers in Lennar Technology Group. The start date for the program will be June 2027.

Job Responsibilities: Intern - AI Engineer

• Develop and test AI inference pipelines and agent components
• Build and test retrieval-augmented generation (RAG) pipelines using internal data
• Write and iterate on prompts with guardrails and output validation
• Document model architectures, experiments, and evaluation results
• Participate in code reviews and AI engineering standards reviews
• Monitor deployed models for performance issues and data drift
• Flag AI outputs exhibiting hallucination, harmful content, or PII exposure
• Collaborate with Data Engineers on training and evaluation data access
• Track production metrics (inference latency, error rates, token costs)
• Stay current with AI and large language model research
• Present internship project findings to the Data & AI team

Qualifications

• Currently pursuing a bachelor's degree with an expected graduation date between December 2027 and May 2029.
• Studying a Computer Science, Data Science, Mathematics, Electrical Engineering, or related field
• Foundational knowledge of machine learning, deep learning, and statistical methods
• Exposure to large language models and generative AI concepts
• Python programming skills (required)
• SQL (a plus)
• Familiarity with prompt engineering or RAG patterns
• Experience with AWS Bedrock, Anthropic Claude API, LangGraph, Jupyter Notebook, or Git/GitHub
• Authorized to work in the U.S. without sponsorship.
• Curious, proactive, and comfortable asking questions to learn and grow.
• Strong communication and problem-solving skills, with the confidence to engage in real business discussions.

Upon program completion, the Company will decide whether to offer high-performing interns a regular full-time position within similar roles under these verticals, based on factors such as job performance and business needs. It is important to note that placement in the Company post-program is not guaranteed.

Life at Lennar

At Lennar, we are committed to fostering a supportive and enriching environment for our Associates, offering a comprehensive array of benefits designed to enhance their well-being and professional growth. Our Associates have access to robust health insurance plans, including Medical, Dental, and Vision coverage, ensuring their health needs are well taken care of. Our 401(k) Retirement Plan, complete with a $1 for $1 Company Match up to 5%, helps secure their financial future, while Paid Parental Leave and an Associate Assistance Plan provide essential support during life's critical moments. To further support our Associates, we provide an Education Assistance Program and up to $30,000 in Adoption Assistance, underscoring our commitment to their diverse needs and aspirations. From the moment of hire, they can enjoy up to three weeks of vacation annually, alongside generous Holiday, Sick Leave, and Personal Day policies. Additionally, we offer a New Hire Referral Bonus Program, significant Home Purchase Discounts, and unique opportunities such as the Everyone’s Included Day. At Lennar, we believe in investing in our Associates, empowering them to thrive both personally and professionally. Lennar Associates will have access to these benefits as outlined by Lennar’s policies and applicable plan terms. Visit Lennartotalrewards.com to view our suite of benefits.