Hi! I'm David,and I'm creating creating better web experiences.
Hello, my name is David Costa. I'm a Senior Software Engineer living in Brazil, creating solutions to help support our customers.
I work with Javascript and Typescript, using React as the main framework most of the time.
This website is intended to concentrate my articles, projects, and be a hub for my networks.
Latest posts
Hardware keys for age: YubiKey and plugins
Keep your age private key inside a YubiKey, where it can’t be copied: plugins, setup, encrypting, decrypting and the cautions that come with it.
linuxsecuritycryptographyOctober 2, 2026
A practical guide to age on Linux
How to encrypt files, folders and backups with age on Linux, with every command, its real output and what happens under the hood.
linuxsecuritycryptographyOctober 1, 2026
Deploying Node.js apps with PM2 and pnpm
Deploy a Node.js app to your own server with one command: PM2 deploy, pnpm and the .env support built into Node.
nodepm2pnpmdeployAugust 14, 2020