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Guillermo
Peitzner

Senior Software Engineer

I build scalable full-stack applications, cloud-native infrastructure, and AI-powered tools — and help engineers grow along the way.

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Guillermo Peitzner — Kubestronaut

Services

Four areas where I focus my work.

Full-Stack Development

End-to-end web application development — from pixel-perfect frontends to scalable backend services and API integrations. Experienced with React, Next.js, Node.js, TypeScript, and enterprise systems.

ReactNext.jsNode.jsTypeScriptPostgreSQL

DevOps & Kubernetes

Design and manage cloud-native infrastructure with Kubernetes, CI/CD pipelines, GitOps workflows, and observability tooling. CKA, CKS, CKAD, KCNA, KCSA certified — Kubestronaut.

KubernetesDockerGCPAWSCI/CD

AI Engineering

Design and develop custom AI applications, including chatbots, Model Context Protocol (MCP) servers, AI agents, chain-of-thought reasoning workflows, and Retrieval-Augmented Generation (RAG) pipelines tailored for intelligent service delivery.

LangChainMCPRAGAI AgentsLLMsPython

Tech Mentoring

One-on-one mentoring for engineers at any stage — career transitions, interview prep, code reviews, and architectural guidance. Former university lecturer with a passion for teaching.

Code ReviewCareerAlgorithmsSystem Design

Certifications

Verified expertise from The Linux Foundation, W3Schools, and Scrum Inc.

  • K★
  • CKS
  • CKA
  • CKAD
  • KCSA
  • KCNA
  • LFCS
  • LFCA
  • JSNAD
  • JSNSD
  • RPO
  • RSM
  • W3TS

Tech stack

Tools and technologies I work with daily.

  • TypeScript
  • React
  • Next.js
  • Node.js
  • Python
  • Go
  • Kubernetes
  • Docker
  • Helm
  • Terraform
  • GCP
  • AWS
  • Azure
  • PostgreSQL
  • Redis
  • GraphQL
  • REST
  • gRPC
  • CI/CD
  • GitOps
  • ArgoCD
  • GitHub Actions
  • Jenkins
  • Contentful
  • LangChain
  • LLMs
  • MCP
  • RAG
  • Linux
  • Bash

Let's build something

If the work sounds like a fit, reach out.

Send an email