Just a blog about programming, technology, and other things that interest me.https://blog.orcololo.com/https://blog.orcololo.com/blog/building-joboeco-part-5-certificates-proceedings/https://blog.orcololo.com/blog/building-joboeco-part-5-certificates-proceedings/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.Mon, 06 Apr 2026 00:00:00 GMThttps://blog.orcololo.com/blog/construindo-joboeco-parte-5-certificados-anais/https://blog.orcololo.com/blog/construindo-joboeco-parte-5-certificados-anais/Parte 5 de 5 — Como funciona a verificação de certificados sem banco de dados usando HMAC-SHA256, os anais com exportação BibTeX, o check-in via QR Code, e o que aprendi no primeiro evento real usando a plataforma.Mon, 06 Apr 2026 00:00:00 GMThttps://blog.orcololo.com/blog/building-joboeco-part-4-eligibility-engine/https://blog.orcololo.com/blog/building-joboeco-part-4-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.Tue, 24 Mar 2026 00:00:00 GMThttps://blog.orcololo.com/blog/construindo-joboeco-parte-4-o-motor-de-elegibilidade/https://blog.orcololo.com/blog/construindo-joboeco-parte-4-o-motor-de-elegibilidade/Parte 4 de 5 — A parte mais complexa do JoBoEco não foi o pagamento nem o deploy — foi modelar as regras de elegibilidade para submissão de trabalhos. Aqui estão as decisões de design e por que isolar lógica de negócio de verdade é mais difícil do que parece.Tue, 24 Mar 2026 00:00:00 GMThttps://blog.orcololo.com/blog/building-joboeco-part-3-payments-pix/https://blog.orcololo.com/blog/building-joboeco-part-3-payments-pix/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.Tue, 03 Mar 2026 00:00:00 GMThttps://blog.orcololo.com/blog/construindo-joboeco-parte-3-pix-na-pratica/https://blog.orcololo.com/blog/construindo-joboeco-parte-3-pix-na-pratica/Parte 3 de 5 — Como implementei pagamentos via Pix no JoBoEco com MercadoPago — do QR Code dinâmico até webhooks em produção, passando por todos os edge cases que só aparecem quando tem dinheiro envolvido.Tue, 03 Mar 2026 00:00:00 GMThttps://blog.orcololo.com/blog/coolify-custom-domain-ssl-traefik-cloudflare/https://blog.orcololo.com/blog/coolify-custom-domain-ssl-traefik-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.Sat, 28 Feb 2026 00:00:00 GMThttps://blog.orcololo.com/blog/coolify-dominio-ssl-traefik-cloudflare/https://blog.orcololo.com/blog/coolify-dominio-ssl-traefik-cloudflare/Parte da série Coolify VPS — como configurar certificados SSL wildcard usando Traefik como reverse proxy e Cloudflare como provedor DNS, incluindo todos os problemas que encontrei pelo caminho.Sat, 28 Feb 2026 00:00:00 GMThttps://blog.orcololo.com/blog/building-joboeco-part-2-the-stack/https://blog.orcololo.com/blog/building-joboeco-part-2-the-stack/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.Tue, 03 Feb 2026 00:00:00 GMThttps://blog.orcololo.com/blog/construindo-joboeco-parte-2-a-stack/https://blog.orcololo.com/blog/construindo-joboeco-parte-2-a-stack/Parte 2 de 5 — Por que escolhi Next.js no Cloudflare Workers com D1 e R2 em vez do caminho óbvio Vercel + PostgreSQL. Os tradeoffs reais, o que funcionou, e o que eu mudaria hoje.Tue, 03 Feb 2026 00:00:00 GMThttps://blog.orcololo.com/blog/building-joboeco-part-1-the-problem/https://blog.orcololo.com/blog/building-joboeco-part-1-the-problem/Part 1 of 5 — How frustration with spreadsheets, Google Forms, platform fees, and processes scattered across N tools led me to build a full academic event management platform.Tue, 06 Jan 2026 00:00:00 GMThttps://blog.orcololo.com/blog/construindo-joboeco-parte-1-o-problema/https://blog.orcololo.com/blog/construindo-joboeco-parte-1-o-problema/Parte 1 de 5 — Como a frustração com planilhas, Google Forms, taxas de plataforma e processos espalhados por N ferramentas me levou a construir uma plataforma completa de gestão de eventos acadêmicos.Tue, 06 Jan 2026 00:00:00 GMT