Sr Software Engineer

Sr Software Engineer, LCP

We are Lennar. Lennar is a leading home builder focused on creating extraordinary experiences for Homeowners, Communities, and Associates. We are a Fortune 500® company consistently ranked among the top homebuilders in the United States.

A Career that Empowers You to Build Your Future. The Sr Software Engineer reports to the Engineering Manager. You will lead the design, development, and evolution of enterprise-grade applications, integrations, and MCP servers. This role requires a hands-on leader to deliver scalable, secure, and business-aligned AI infrastructure on AWS.

• Lead the architecture, design, and implementation of full-stack systems using Type Script/React and Go.
• Drive your team's adoption of legal, compliance, and procurement platform capabilities—including IDP templates (e.g., Backstage), shared CI/CD pipelines, and Terraform modules—and establish team standards on top of them.
• Partner with central platform teams: provide feedback, influence roadmaps, and contribute improvements to shared templates and modules where appropriate.
• Lead the development of agentic and AI product capabilities—AI agents, MCP servers, and LLM-powered features—ideally leveraging AWS Bedrock, Claude, and OpenAI.
• Own production readiness for your team's services: observability, reliability, security, and performance.
• Mentor and develop engineers through design reviews, pairing, and technical guidance.
• Partner with product stakeholders to translate business needs into scalable technical solutions.
• Deploy infrastructure-as-code using Terraform or Cloud Formation.
• Instrument observability using Open Telemetry tracing and structured JSON logging.
• Conduct technical design reviews and architecture governance.
• Transfer knowledge to the platform team through live sessions and documentation.

Bachelor's degree in Computer Science, Engineering, or related field, or equivalent practical experience. 5+ years of professional software development experience, including ownership of production systems ert-level proficiency in Type Script and React, and strong backend experience with Go. Deep understanding of system design, API architecture, security, and performance optimization. Proven success operating in a Dev Ops/self-service environment where product teams own their infrastructure and delivery pipelines.

Demonstrated technical leadership: driving projects end-to-end, setting standards, and mentoring engineers. Excellent communication skills with both technical and non-technical audiences. Experience with Service Now, Legal, Compliance and Procurement systems/applications. Deep CI/CD expertise (Git Hub Actions or similar) — highly preferred. Strong infrastructure-as-code expertise (Terraform or similar) — highly preferred. Experience self-serving through internal developer portals such as Backstage (golden paths, software templates, service catalogs).

Production experience building agentic/AI systems (AI agents, MCP servers, LLM applications); hands‑on AWS Bedrock experience is a strong differentiator. Python Mastery: 5+ years of production Python using async frameworks like FastAPI or Starlette. Type Script/React and Go 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 Agent Core. Identity & Security:
Advanced OAuth 2.0/OIDC execution, including On-Behalf-Of flows and JWT validation. Platform Engineering:
Experience authoring Spotify Backstage templates and Git Hub Actions CI/CD pipelines. Enterprise Integration:
Proven history of integrating complex REST APIs such as Workday, Salesforce, or Service Now.