Lead Software Engineer, AI Platform

Lennar•Irving, TX

1d•Hybrid

About The Position

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 The Lead Software Engineer reports to the Engineering Manager. You will lead the design, development, and evolution of enterprise-grade AI solutions and MCP servers. This role requires a hands-on leader to deliver scalable, secure, and business-aligned AI infrastructure on AWS. A career with purpose. A career built on making dreams come true. A career built on building zero defect homes, cost management, and adherence to schedules.

Requirements

Python Mastery: 7+ years of production Python using async frameworks like FastAPI or Starlette.
AWS Infrastructure: Deep knowledge of IAM role chaining, Secrets Manager, ECR, and VPC networking.
AI & Agentic Systems: Hands-on experience with Model Context Protocol (MCP) and AWS Bedrock AgentCore.
Identity & Security: Advanced OAuth 2.0/OIDC execution, including On-Behalf-Of flows and JWT validation.
Platform Engineering: Experience authoring Spotify Backstage templates and GitHub Actions CI/CD pipelines.
Enterprise Integration: Proven history of integrating complex REST APIs such as Workday, Salesforce, or ServiceNow.
Experience: 8+ years of overall IT experience.
Specialization: 6+ years of hands-on architecture and development experience.
Leadership: Demonstrated ability to lead complex, enterprise-scale implementations.
Communication: Excellent technical writing skills for runbooks and architecture docs.

Responsibilities

Lead the adoption of ServiceNow and AWS-native AI capabilities.
Identify opportunities where AI reduces manual effort and improves service outcomes.
Design a repeatable, domain-aligned pattern as a Spotify Backstage Software Template.
Architect production-ready MCP servers with integrated authentication and RBAC.
Develop reference Python MCP servers for enterprise domains like Workday.
Implement shared authentication libraries for Entra ID and OAuth flows.
Build a tool-accuracy eval harness to validate LLM tool behavior in CI.
Automate registration with AWS Bedrock AgentCore Gateway.
Manage container deployment on AWS ECS Fargate using read-only filesystems.
Deploy infrastructure-as-code using Terraform or CloudFormation.
Instrument observability using OpenTelemetry tracing and structured JSON logging.
Conduct technical design reviews and architecture governance.
Transfer knowledge to the platform team through live sessions and documentation.