Bertoldo Klinger

I build scalable web systems and resilient distributed services on AWS — TypeScript, NestJS, Postgres, Redis — with observability (OpenTelemetry, SigNoz) and resilience patterns (circuit breakers, retries) baked in. I leverage modern AI-assisted dev workflows (Cursor, Claude Code, MCP) to ship faster without compromising architectural integrity.

Recent work contributed to a historical NPS of 79.

• pizza.shop

  Restaurant management dashboard with orders, menus, and reviews. Built to explore production-grade React patterns: TanStack Query, server state, optimistic updates, and a clean shadcn/ui foundation.

  • TypeScript
  • React
  • TanStack Query
  • Tailwind
  • shadcn/ui

• Sleepr

  Hotel reservation system implemented as a NestJS microservices monorepo with CI/CD. Each service runs independently and communicates via message broker.

  • NestJS
  • Microservices
  • Docker
  • MongoDB
  • RabbitMQ

• CodePix

  Pix-style payment simulator with microservices in NestJS and Go, using Kafka for messaging. Models real banking flows: keys registration, transactions, confirmations.

  • NestJS
  • Go
  • Kafka
  • Next.js
  • PostgreSQL

Languages

• TypeScript
• JavaScript
• Go
• SQL

Backend

• Node.js
• NestJS
• REST
• Microservices
• Kafka
• RabbitMQ

Cloud & DevOps

• AWS (EKS, Lambda, S3)
• Docker
• CI/CD
• IaC
• Vercel

Data

• PostgreSQL
• Redis
• MongoDB

Observability & resilience

• OpenTelemetry
• SigNoz
• Datadog
• Circuit breakers
• Retries

AI dev tools

• Cursor
• Claude Code
• MCP
• Agentic workflows

Testing

• Jest
• TDD
• Integration tests

Certifications

• AWS Certified Cloud Practitioner
• Datadog: Intro to Observability
• EF SET C2 — English

Best reached by email or LinkedIn. I'm always open to interesting conversations about distributed systems, AWS, and engineering with AI.