Lennar Corporation

Principal Full Stack Engineer

Lennar Corporation • $135K — $160K *
Miami, FL 33186In-Person
Information Technology
8 - 10 years of experience
Reposted Today
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Job Overview by Ladders

Qualifications

  • 8+ years of engineering experience, particularly in backend services and cloud-native infrastructure.
  • Deep CI/CD expertise with GitHub Actions and hands-on redesigning of pipelines for AI integration.
  • Experience in platform engineering, focusing on the needs of engineers as customers.
  • Fluent in GoLang and TypeScript/JavaScript with capability in automation scripting and workflow tooling.
  • Direct application of AI coding tools in production engineering, facilitating adoption beyond personal use.
  • Practical knowledge of LLM integration patterns and agentic frameworks.
  • Strong understanding of agentic system design and multi-step workflow architecture.

Responsibilities

  • Embed with engineering teams for hands-on AI tooling adoption.
  • Design and run transformation programs including onboarding sprints and lunch-and-learn sessions.
  • Create and update internal AI transformation documentation and playbooks.
  • Collaborate with managers to identify transformation opportunities within teams.
  • Redesign CI/CD pipelines to include automated AI-driven processes.
  • Build a platform layer for safe and repeatable AI tooling use.
  • Define and implement patterns for agentic workflows linked to platform engineering.

Benefits

  • Comprehensive health insurance plans including Medical, Dental, and Vision.
  • 401(k) Retirement Plan with a $1 for $1 Company Match up to 5%.
  • Paid Parental Leave and an Associate Assistance Plan for critical life moments.
  • Education Assistance Program and adoption assistance up to $30,000.
  • Generous vacation policy with three weeks off, plus additional holiday and personal days.
  • New Hire Referral Bonus Program and discounts on home purchases.
  • Supportive initiatives like Everyone's Included Day.
Full Job Description
Principal Full Stack Engineer

About the Role

  • Lead the architecture and delivery of production-grade AI-powered systems across the full stack.
  • Operate at the intersection of applied AI research and software craftsmanship - designing agentic workflows, integrating large language models, and establishing engineering practices at scale.
  • Serve as the technical standard-bearer for how the organization builds, evaluates, and operates AI features.
  • Partner with Engineering and Data to translate ambiguous business problems into concrete technical roadmaps.
  • Drive AI engineering strategy across the stack, authoring RFCs and leading design reviews that raise the bar for the entire engineering org.


What You'll Do

  • Design and own end-to-end AI features: from prompt engineering and model selection through to scalable APIs and responsive front-end surfaces.
  • Architect multi-agent and agentic workflow systems using frameworks such as LangGraph, CrewAI, AutoGen, or custom orchestration layers.
  • Build retrieval-augmented generation (RAG) pipelines with production-grade chunking, embedding, indexing, and reranking strategies.
  • Integrate LLM providers (OpenAI, Anthropic, Gemini, local models via Ollama / vLLM) with robust fallback, rate-limiting, and cost controls.
  • Deliver polished, accessible front-end experiences in React that expose AI capabilities with low latency and graceful degradation.
  • Build and maintain high-throughput back-end services in Node.js, or Go serving as the inference and orchestration layer.
  • Define and implement LLM evaluation frameworks evals, red-teaming, regression suites to continuously measure model quality in production.
  • Instrument AI pipelines with tracing, latency histograms, and cost dashboards using tools such as LangSmith, Helicone, or Grafana..
  • Embed responsible-AI practices: hallucination mitigation, PII redaction, output guardrails, and bias monitoring into every feature.
  • Mentor senior engineers, conduct rigorous code and architecture reviews, and contribute to hiring by defining role expectations and screening candidates.


What We're Looking For

  • 8+ years of professional software engineering with at least 2 years building production AI / ML systems.
  • Expert-level proficiency in Go and TypeScript / JavaScript; comfortable owning the full stack from model to UI.
  • Hands-on experience designing and shipping LLM-powered features including prompt engineering, fine-tuning, and RLHF concepts.
  • Deep understanding of transformer architectures, token economics, context window management, and inference optimization.
  • Proven track record with RAG architectures, embedding models, and semantic search at scale.
  • Strong grasp of distributed systems, API design, and cloud-native infrastructure (AWS)..
  • Experience with MCP (Model Context Protocol), tool-use patterns, and multi-agent orchestration in production.
  • Demonstrated ability to lead without formal authority, influencing direction through technical credibility and clear communication.
  • Contributions to open-source AI projects or published technical writing on AI engineering topics preferred.
  • Experience in regulated or enterprise environments where auditability, security, and compliance are first-class concerns is a plus.


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.

Join the fun and follow us on social media to see what's happening at our company, and don't forget to connect with us on Lennar: Overview | LinkedIn for the latest job opportunities.

About Lennar Corporation

Lennar Corporation Careers

Join the dynamic team at Lennar Corporation, a leader in the home construction industry, and be part of a company that values innovation, leadership, and diversity. At Lennar, we are committed to building more than homes—we are dedicated to building futures.

Work You’ll Do

At Lennar Corporation, you will engage in meaningful work that directly contributes to the growth and success of the company. Our team is at the forefront of the construction industry, driving innovation and excellence in every project. Whether you are in design, construction, sales, or management, your contribution will lead to tangible results that you can be proud of.

Innovative Work

Lennar Corporation is not just a leader in home construction; we are also pioneers in developing cutting-edge technologies and sustainable practices that redefine what is possible in our industry. Join our team of over 9,000 dedicated professionals who are working at the intersection of technology, sustainability, and residential construction.

Be Part of a Great Team

Our team at Lennar Corporation is diverse, skilled, and driven—united by a common goal to deliver exceptional quality and service to our customers. We foster a culture of support and collaboration, which makes Lennar not just a great place to work, but a great place to grow your career.

Future-Proof Your Career

Lennar Corporation offers a wealth of job opportunities and career paths, providing you with the flexibility to pursue your interests and expand your professional experience. With robust training programs and a commitment to professional development, Lennar ensures that your career journey is as rewarding as it is successful.

Explore Job Opportunities and Internships

Whether you’re a seasoned professional looking for your next challenge or a recent graduate seeking an internship, Lennar has a variety of positions to match your skills and ambitions. From on-site construction roles to corporate leadership positions, the opportunities at Lennar are as diverse as our team.

Employment Benefits and Culture

Choosing a career at Lennar means more than just employment. It means becoming part of a community that values diversity, supports growth, and nurtures innovation. We offer competitive benefits, leadership training, and opportunities for networking and career advancement, all within a culture that celebrates achievement and teamwork.

Stay Connected

Join Our Team Search open positions that match your skills and interests. We look for passionate, curious, creative, and solution-driven team players. Ready to start your career at Lennar Corporation? Explore our job listings today and find out how your talents can contribute to our mutual success.

Keep Up to Date

Stay ahead with career tips, insider perspectives, and industry-leading insights you can put to use today—all from the people who work here. Learn about our latest projects, our approach to innovation and sustainability, and how we’re transforming the construction industry.

Job Alert Emails

Personalize your subscription to receive job alerts, latest news, and insider tips tailored to your preferences. Discover the exciting and rewarding career opportunities that await at Lennar Corporation. Join Lennar Corporation today and be part of a team that is building the future—one home at a time.
Learn more about Lennar Corporation
Size
10,753 employees
Market Cap
$25.7 billion
Industry
Real Estate & Construction
Net Income
$2.4 billion
Founded
1954
Revenue
$22.4 billion
NASDAQ
LEN
* Ladders Estimates

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