Blog | Orcololo

PT

2026

Building JoBoEco, Part 5: certificates, proceedings, and the first real event

Part 5 of 5 — How certificate verification works without a database using HMAC-SHA256, the proceedings with BibTeX export, QR Code check-in, and what I learned at the first real event using the platform.

April 6, 2026
7 min read

joboeco hmac certificates jspdf bibtex proceedings qrcode
Building JoBoEco, Part 4: the eligibility engine

Part 4 of 5 — The most complex part of JoBoEco was not the payment or the deploy — it was modeling the eligibility rules for paper submissions. Here are the design decisions and why truly isolating business logic is harder than it looks.

March 24, 2026
6 min read

joboeco domain-design typescript peer-review clean-architecture
Building JoBoEco, Part 3: Pix in practice

Part 3 of 5 — How I implemented Pix payments in JoBoEco with MercadoPago — from dynamic QR Code to production webhooks, through all the edge cases that only surface when real money is involved.

March 3, 2026
7 min read

joboeco mercadopago pix payments webhooks nextjs
Coolify VPS Setup: Custom Domain & SSL with Traefik and Cloudflare

Part of the Coolify VPS series — how to set up wildcard SSL certificates using Traefik as a reverse proxy and Cloudflare as the DNS provider, including every pitfall I ran into along the way.

February 28, 2026
10 min read

coolify traefik cloudflare devops self-hosting
Building JoBoEco, Part 2: going all-in on Cloudflare

Part 2 of 5 — Why I chose Next.js on Cloudflare Workers with D1 and R2 instead of the obvious Vercel + PostgreSQL path. The real tradeoffs, what worked, and what I would change today.

February 3, 2026
7 min read

joboeco cloudflare nextjs drizzle-orm cloudflare-d1 opennext stack