Mateus Welter

DevOps Engineer · Brazil

kubernetesterraformci/cdobservabilityaws·gcp·oci

What I do

Cloud & IaC

Scalable, cost-efficient infrastructure on AWS, GCP & OCI — provisioned with Terraform, never by hand.

CI/CD & Automation

Pipelines with GitHub Actions & ArgoCD that ship code to production without drama.

Observability

Systems that tell you what's happening — OpenTelemetry, Prometheus, Grafana, Datadog.

📍 Cerro Largo, Brazil — working with teams everywhere.

Experience

  1. Support EngineerE-core

    2024Current

    Advanced troubleshooting and observability analysis for large-scale federated GraphQL architectures, for a major enterprise customer.

    apollo routerfederationgraphosopentelemetryrusttroubleshooting
  2. DevOps EngineerEzops.cloud

    20232024

    Implement scalable systems on AWS, ECS, and EKS.

    awsecseksdockergitci/cdcloudformationterraformgkeaws lambdaonpremvmwareazuredevops
  3. DevOps Engineer Jr.TMaior Services

    20222023

    Develop and deploy systems rapidly and securely.

    awsecsgkedockergitci/cdcloudformationterraform
  4. Backend DeveloperLojas Becker

    20202022

    Develop REST APIs using PHP, Advpl, and Node.js.

    advplphpjavascriptdockercloudrestshell

Skills

Kubernetes (EKS·GKE·OKE)85
CI/CD (GitHub Actions·ArgoCD)85
Docker85
Terraform80
OpenTelemetry80
Prometheus80
Grafana80
Linux / Bash80
REST API80
GraphQL Federation (Apollo)70
GCP65
AWS65
Loki / Tempo65
Datadog60
TypeScript60
SQL55
Python55
Golang45
Rust35

Certifications

Apollo Graph Developer - Professional badge

Apollo Graph Developer - Professional

Apollo GraphQL

2025 · no expiration

AWS Certified Cloud Practitioner badge

AWS Certified Cloud Practitioner

Amazon Web Services (AWS)

2024 → 2027

Apollo GraphQL - Associate badge

Apollo GraphQL - Associate

Apollo GraphQL

2024 · no expiration

Projects

echoweather

GraphQL federation reference: a weather supergraph with NestJS subgraphs behind the Apollo Router.

nestjsgraphqlfederationapollo router

homelab k8s cluster

private

Kubeadm cluster fully automated with Terraform, Proxmox and Ansible.

terraformproxmoxansiblekubeadm

aws pipeline monitor

private

Custom monitoring for AWS pipelines with alerting delivered to Discord.

awslambdadiscord

this portfolio's infra

private

Frontend on Vercel; Golang backend on OKE; CI with GitHub Actions, CD with ArgoCD.

okegolanggithub actionsargocd
more on github →

Contributions

apollographql/router#9306

docs(observability): document apollo.router.cache.redis.reconnection and .unresponsive metrics

merged · May 2026

nestjs/graphql#3953

test(@nestjs/apollo): add e2e coverage for subscriptions with ApolloFederationDriver

merged · Apr 2026

apollographql/router#8974

fix(composition): relax @interfaceObject validation for Fed 1 subgraphs

merged · Apr 2026

apollographql/router#9141

fix(connectors): handle 204 responses without Content-Length header

merged · Apr 2026

apollographql/router#9028

fix(helm): fix PDB template ignoring zero values for minAvailable and maxUnavailable

merged · Apr 2026

apollographql/federation#3391

fix(composition): resolve @composeDirective definitions per-directive instead of per-spec

merged · Mar 2026

apollographql/router#8929

fix(helm): use router.fullname for ServiceMonitor metadata.name

merged · Feb 2026

apollographql/router#8587

docs: update Redis metric from connections to clients

merged · Dec 2025

more on github →

Get in touch