Lead Software Engineer, Plan Intelligence

Lennar is a leading homebuilder dedicated to building quality homes and providing exceptional customer service. The Lead Software Engineer will design, develop, test, and deploy Plan Intelligence, an internal analytics platform, while leading engineers and collaborating across product, data, and technology teams.

Responsibilities:

• Collaborate with project stakeholders (product owners, UX researchers, data team, QA team, project managers, cross team leads and designers) to understand functional and non-functional requirements
• Promote a collaborative team environment and work closely with colleagues to achieve business objectives
• Responsible for planning work estimation and forecasting
• Adhere to architecture, design, implementation, security standards and best practices
• Investigate and propose solutions to development and design problems
• Conduct analysis to determine integration needs, and design and plan integrations
• Prepare technical documentation, including software design evaluation plans and test results
• Write high-quality code that satisfies customer needs and strives for simplicity, clarity, and testability
• Implement unit and integration tests and conduct functional and performance testing where appropriate
• Participate in code reviews or use collaborative programming techniques to promote high quality business outcomes
• Develop reusable software building blocks to enable faster delivery
• Improve performance of existing software by diagnosing and resolving critical issues
• Establish development practices and processes
• Manage and mentor software engineers
• Lead the design and delivery of Plan Intelligence, an internal analytics platform for plan portfolio analysis, market insights, consumer segments, and EI packages used by division and product teams
• Own features end to end across a server-rendered React and TypeScript front end and a Python FastAPI service backed by PostgreSQL on AWS
• Partner with data engineering on the pipelines that feed plan, geospatial, and margin data into the platform, and help define the contracts between them
• Build and tune interactive mapping, charting, and export experiences over large plan and community datasets
• Extend LLM-assisted features built on AWS Bedrock, keeping output quality, latency, and cost within agreed limits
• Support the platform across development, UAT, and production environments on AWS, using application monitoring and product analytics to find and resolve issues

Requirements:

• Master's degree in computer science and worked at a company for 5+ years with web technology stack and web standards
• Bachelor's degree in computer science, computer information systems or equivalent degree and worked at a company for 7+ years with web technology stack and web standards
• Growth mindset and a willingness to learn new skills, technologies, and frameworks
• Excellent problem solving and analytical skills
• Proven track record for managing a team of developers to achieve company goals
• Proven track record for architecting, scaling and implementing complex technical solutions
• Proven track record of leadership in Agile environments, with excellent communication and collaboration skills, and a passion for mentoring and empowering team members
• Demonstrated ability to communicate complex technical information in a condensed manner to various stakeholders verbally and in writing
• Strong expertise in JavaScript (7+ years) with deep understanding of advanced principles of client-side and server-side development
• High proficiency in React.js (5+ years), with a solid background in building performant UI components with modern hooks and design patterns
• Strong command of semantic HTML and modern CSS, including CSS-in-JS with a focus on accessibility and responsive design principles
• Proficiency in TypeScript and a modern React toolchain (Vite, server-side rendering, client-side routing, and a server-state library such as TanStack Query or equivalent), demonstrating the ability to architect and implement robust front-end solutions
• Knowledge in building and tooling processes such as CI/CD pipelines, version control (Git), and package managers, coupled with extensive experience in debugging and troubleshooting complex issues
• Proficiency in Python with a production web framework such as FastAPI, and strong SQL against a relational database such as PostgreSQL
• Hands-on experience building, deploying, and operating containerized services on AWS (ECS, S3, IAM) using Docker and infrastructure as code
• Experience integrating enterprise single sign-on (OIDC, Microsoft Entra ID) and handling server-side sessions and tokens securely
• Experience writing automated tests at both the unit and integration level across the front end and the back end
• Data analytics and reporting interfaces
• Geospatial data and interactive mapping
• Generative AI and LLM integrations
• Data pipelines, streaming, and data lake formats
• A/B testing and product analytics instrumentation
• Backend development
• Cloud platforms
• 3rd-party integrations
• Homebuilding, real estate, or construction domain data