Sr Software Engineer, Fullstack

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 by building quality homes and providing 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.

Join a Company that Empowers You to Build Your Future

We are seeking a senior back-end/full-stack Software Engineer to join our team building and evolving our flagship digital web presence. The ideal candidate brings deep experience building scalable .NET services, strong SQL skills (with SQL Server preferred), and expertise designing and operating GraphQL and RESTful APIs. You will collaborate with cross-functional teams and partners to deliver reliable, secure integrations across application services, data stores, and CMS capabilities (with Optimizely experience highly preferred). Front-end experience (e.g., Next.js) is nice to have but not required.

Your Responsibilities on the Team

Software Development:

• Design, develop, and maintain back-end and full-stack services, ensuring scalability, performance, reliability, and security.
• Write clean, maintainable, and efficient code, following best practices and coding standards.
• Build robust back-end services using .NET and implement API layers leveraging GraphQL (and REST as needed); design and optimize data access patterns with SQL (preferably SQL Server). Front-end development in React/Next.js is a plus.
• Leverage AI tooling to supercharge productivity.

Architecture and Design:

• Contribute to the architecture and design of software systems, ensuring alignment with business goals and technical strategy.
• Participate in technical design reviews, providing feedback and recommendations to improve system design and code quality.

Testing and Quality Assurance:

• Develop and execute unit tests, integration tests, and automated tests to ensure software quality.
• Identify and resolve defects and performance issues, conducting thorough code reviews to maintain high standards of code quality.
• Work closely with QA teams to implement and improve testing strategies and processes.

Collaboration and Teamwork:

• Collaborate with product managers, designers, and other engineers to deliver high-quality features and enhancements.
• Participate in agile ceremonies such as sprint planning, stand-ups, and retrospectives, contributing to the continuous improvement of the team’s processes.
• Communicate effectively with both technical and non-technical stakeholders, providing updates on progress and potential challenges.
• Help troubleshoot and resolve incidents as needed.

Mentorship and Leadership:

• Mentor and guide junior engineers, sharing knowledge and best practices to help them grow in their roles.
• Lead by example, demonstrating a strong work ethic, a commitment to quality, and a proactive approach to problem-solving.
• Take ownership of features or projects, driving them from concept to completion with minimal supervision.

Continuous Improvement and Innovation:

• Stay up to date with industry trends, emerging technologies, and best practices, and bring new ideas to the team.
• Identify opportunities for process improvements, refactoring, or technical enhancements to optimize the software development lifecycle. 
• Participate in technical discussions and contribute to the evolution of the team’s technical direction.

Your Toolbox

• Education: Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent practical experience.
• Experience: Minimum 5-7 years in software engineering, with a strong emphasis on back-end and full-stack development across modern web platforms.
• .NET / API Expertise: Proven experience building scalable services using .NET, including API design and implementation with GraphQL and REST.
• Data & CMS Integration: Strong familiarity with relational data modeling and SQL Server, plus experience integrating with CMS platforms; Optimizely experience is highly preferred.
• Agile Mindset: Comfortable working in agile environments, adapting quickly to evolving requirements and priorities.
• Problem Solving: Strong analytical skills with a detail-oriented mindset and a proactive approach to ownership and accountability.
• Communication: Excellent verbal and written communication skills, with the ability to collaborate effectively across cross-functional teams.
• Initiative & Drive: Self-starter with a passion for technology, continuous learning, and driving projects forward with minimal supervision.
• Integrity & Quality: Committed to delivering high-quality, secure, and maintainable software solutions with professionalism and accountability.

Additional Skills

While this role is primarily back-end/full-stack focused, experience in these areas is a strong plus:

• CMS & Platform Engineering: Experience building and integrating services around CMS platforms, with Optimizely highly preferred (content delivery, personalization, workflows, and integrations).
• Cloud & Infrastructure: Working knowledge of cloud platforms such as Azure, AWS, or GCP, and containerization tools like Docker and Kubernetes is a plus.
• CI/CD & DevOps: Experience integrating applications into CI/CD pipelines using tools like Azure DevOps (ADO) and GitHub Actions, with a solid understanding of version control and automation is a plus.
• Architecture & Databases: Deep understanding of API architecture (GraphQL and REST), service design, and database design/optimization with SQL Server strongly preferred.
• Front-End Collaboration: Ability to collaborate effectively with front-end engineers and, when needed, contribute to UI work in React/Next.js is a plus.

Physical & Office/Site Presence Requirements:

This is primarily a sedentary office position which requires the incumbent to have the ability to operate computer equipment, speak, hear, bend, stoop, reach, lift, and move and carry up to 25 lbs. Finger dexterity is necessary.

This description outlines the basic responsibilities and requirements for the position noted. This is not a comprehensive listing of all job duties of the Associates. Duties, responsibilities and activities may change at any time with or without notice.

Lennar is an equal opportunity employer and complies with all applicable federal, state, and local fair employment practices laws.

This role is primarily remote. However, candidates who reside within a 50-mile radius of Irving, TX or Miami, FL—or within commuting distance of any Lennar hub—are expected to work onsite at least three days per week, or as otherwise directed by their manager.

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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.

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Lennar is an equal opportunity employer and complies with all applicable federal, state, and local fair employment practices laws.