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peporerto/README.md

Santiago Guisao

Cloud Backend Developer · TypeScript · AWS · Serverless · Event-Driven Systems

Canada, ON · linkedin.com/in/santiago-guisao-yusti · santiagog2142@gmail.com

Cloud Backend Developer with 3+ years of experience designing, building, and operating cloud-native systems on AWS. Focused on distributed systems, event-driven architectures, security, observability, and software reliability. Strong experience with Infrastructure as Code, CI/CD pipelines, and architectural decision records (ADRs).

Featured Projects

PayStream Pipeline

Lambda · API Gateway · Kinesis · DynamoDB · SQS · CDK

Serverless transaction ingestion pipeline built for resilience under real load.

  • 5,000 events processed — zero data loss, zero DLQ messages
  • 90% reduction in Lambda invocations via Kinesis batching (100 events / 5s window) + DynamoDB GSI replacing full-table scan
  • SQS Dead Letter Queue + Lambda Retrier with exponential backoff (2s → 4s → 8s → 16s) — correctness under throttling verified, not assumed
  • IAM roles scoped per function — least-privilege enforced at infrastructure layer
  • ADR governance CI: GitHub Actions blocks merges on architectural violations
  • Full infrastructure provisioned with AWS CDK: Kinesis, Lambda, DynamoDB + GSI, SQS DLQ, API Gateway, CloudWatch alarms, IAM roles

View repository

CloudFront CDN + Signed URL Architecture

S3 · CloudFront · Origin Access Control · RSA-2048

  • 87% cache hit ratio, 67% cost reduction vs direct S3 access
  • Access enforced at CDN edge with OAC and RSA-2048 signed URLs

View repository

Infrastructure as Code — Terraform · Jenkins · Docker

Terraform · Jenkins · Docker · AWS EC2 / VPC / Security Groups

  • Automated AWS infrastructure provisioning using Terraform modules orchestrated through a Jenkins + Docker CI/CD pipeline

View repository

Tech Stack

Backend · TypeScript · Node.js · NestJS · Python · Express.js

AWS · Lambda · API Gateway · Kinesis · ECS Fargate · DynamoDB · S3 / CloudFront · Cognito · SQS / SNS · CDK · CloudWatch · EC2

Data · PostgreSQL · MySQL · Redis · Kafka

Infra / CI-CD · Docker · Terraform · GitHub Actions · AWS CDK

Auth / Security · IAM · JWT / OAuth 2.0 · RBAC · Cognito

Practices · ADR Governance · Infrastructure as Code · Event-Driven Architecture · Observability

Contact

Pinned Loading

  1. Interactive-Weekly-Agenda Interactive-Weekly-Agenda Public

    A modern, interactive weekly agenda web app built with React. It features task management, role selection, theme switching (light/dark), and language switching (Spanish/English).

    TypeScript

  2. Jenkins-Docker-Terraform-y-AWS Jenkins-Docker-Terraform-y-AWS Public

    IaC pipeline using Jenkins, Docker, and Terraform to deploy AWS infrastructure automatically.

    HCL

  3. prueba-back-end prueba-back-end Public

    TypeScript

  4. test-personalsoft test-personalsoft Public

    Python