Available for consulting

David
MT

Senior SRE & DevOps Engineer · dwsa-mm.com

Building resilient infrastructure, automated pipelines, and observable systems at scale. Based in Costa Rica.

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02 // expertise

What I work with

Orchestration
Container & Infra
KubernetesDockerArgoCDHelm
Observability
Monitoring & Alerting
PrometheusGrafanaAlertmanagerPagerDuty
Cloud
Multi-cloud
AWSAzureGCPTerraform
Automation
CI/CD & Config Mgmt
GitHub ActionsGitLab CIAnsibleChef
Security
Secrets & Access
HashiCorp VaultIstioEnvoyTraefik
Languages
Code & Scripting
PythonGoBashPowerShell
Virtualization
VMware & Compute
vSphereESXivCenterVMware
Data
Databases & Query
SQLPostgreSQLMySQL
03 // writing

From the blog

Two-Layer Spam Protection Without CAPTCHAs
01
2026-06-03 · 4 min read
Two-Layer Spam Protection Without CAPTCHAs
How to stop contact form spam silently using a honeypot field and D1 rate limiting — no CAPTCHA, no third-party scripts, no false positives.
 KV vs D1: When to Use Each on Cloudflare Workers
02
2026-05-20 · 3 min read
KV vs D1: When to Use Each on Cloudflare Workers
KV is a global key-value store with eventual consistency. D1 is SQLite with strong consistency but regional writes. Choosing wrong costs you later.
 One Year Building on the Edge: What I'd Change
03
2026-05-20 · 4 min read
One Year Building on the Edge: What I'd Change
An honest look at building a full site on Cloudflare Workers: what works well, what hurts, and what I'd do differently starting over today.
View all posts →
04 // contact
Let's build
something
reliable.
david@dwsa-mm.com github.com/dmatat linkedin.com/in/dmt107