Luis Mena
Open Projects
A collection of hands-on projects across cloud infrastructure, AI, and software engineering.
ShopSage — AI Shopping Assistant (RAG + Agent on AWS Bedrock)

ShopSage — AI Shopping Assistant (RAG + Agent on AWS Bedrock)
FEATURED

Deployed on AWS, built end to end. RAG over policy docs with citations and an anti-hallucination guardrail; an agent (AWS Bedrock + Claude) that separates read vs. write actions with confirmation and idempotency; a two-stage retriever (pgvector/HNSW + an exact re-ranker written in C, ~60x faster than pure Python); and an event-driven ingestion pipeline — drop a doc in S3 and it's searchable seconds later (S3 → SQS → Lambda). Frontend in Angular, backend in Flask, all infrastructure in Terraform (ECS Fargate, RDS + pgvector, CloudFront, Cognito).
P1 — Terraform Fundamentals

P1 — Terraform Fundamentals
DONE

Covers all HashiCorp certification language fundamentals: all variable types (string, number, bool, list, map, object), built-in functions, locals, data sources, sensitive variables, provisioners, terraform_data, variable precedence, and state migration.
P2 — VPC + EC2: Variables & Data Sources

P2 — VPC + EC2: Variables & Data Sources
DONE

Custom VPC with public and private subnets across multiple AZs using count. EC2 with AMI data source. Multi-environment setup with dev.tfvars and staging.tfvars. Covers count, splat expressions, and variable precedence.
P3 — 3-Tier App: Modules + Remote State

P3 — 3-Tier App: Modules + Remote State
DONE

Three-tier architecture (networking, compute, database) built with reusable child modules. ALB + ASG + RDS MySQL. Demonstrates module composition, remote state sharing, and sensitive output handling.
P4 — ECS Fargate: State Management + Workspaces

P4 — ECS Fargate: State Management + Workspaces
DONE

Containerized app on ECS Fargate with ECR. Covers lifecycle meta-arguments (prevent_destroy), dynamic blocks, templatefile(), Terraform workspaces for dev/staging/prod, moved block for safe refactoring, and import block for existing resources.
P5 — Landing Zone: Multi-account + HCP Terraform

P5 — Landing Zone: Multi-account + HCP Terraform
DONE

Enterprise AWS Landing Zone with Organizations, SCPs, and OUs. for_each with map(object), for expressions, conditional resources. Public Registry module usage. HCP Terraform for remote operations and team collaboration.
© 2026 Luis Mena