00/Technical notes / 2026
Blog .
Notes from the trenches. What we learn building software for real clients.
6+
topics in the editorial queue
2/mo
publishing frequency
ES · EN
each note ships bilingual
100%
from real projects in production
02/Archive
Everything we have published.
Organised by topic. Each note translates a real project into prose — no SEO filler.
- BusinessJun 20, 20267 min
PMS for boutique hotels in Costa Rica 2026
Real 2026 comparison of PMS options for boutique hotels in Costa Rica: Cloudbeds, SiteMinder + separate PMS, Mews and custom Next.js + Supabase. USD costs, what each one includes, side-by-side feature table, hotel profiles and 3-year total cost.
Jafeth JiménezRead note
- BusinessJun 13, 20267 min
Measure ROI of custom software: 90-day framework for CR founders
90-day framework to measure the real ROI of custom-built software — what to measure on Day 1, 30, 60, and 90, per-vertical metrics, common mistakes, and a real case that paid back in 8 months.
Jafeth JiménezRead note
- BusinessJun 13, 20267 min
Optimize ecommerce checkout in Costa Rica: from 1.5% to 3.5% conversion
The average Costa Rica ecommerce conversion is 1.2–1.8% vs 2.5–3.5% globally. It is not the tech, it is the checkout friction. The 7 most common leaks, how to balance Stripe + BAC + SINPE, real A/B tests, and a howTo to audit your checkout.
Jafeth JiménezRead note
- BusinessMay 22, 20267 min
Hosting in Costa Rica 2026 — Vercel vs AWS vs Cloudflare vs local
Real USD costs, measured latency from San José, deploy simplicity and when each one is worth it. Vercel, AWS, Cloudflare, Hetzner, DigitalOcean and local CR hosts (Cabletica, RACSA) compared without marketing spin.
Jafeth JiménezRead note
- BusinessMay 22, 20267 min
How to choose a software agency in Costa Rica — 7 red flags when quoting
Seven red flags that identify agencies likely to abandon you, overcharge, or fail to deliver. How to do due-diligence before signing, what to demand in writing, and how to spot misaligned incentives.
Jafeth JiménezRead note
- BusinessMay 22, 20267 min
Migrating WordPress to Next.js in Costa Rica — 2026 Guide
When migrating WordPress to Next.js makes sense, real USD costs, how to preserve SEO and organic traffic, and the 7 concrete steps to do it right without getting penalized by Google.
Jafeth JiménezRead note
- BusinessMay 22, 20266 min
Online reservations for hotels in Costa Rica: 2026 tech setup
Step-by-step technical setup of an online booking system for boutique hotels in Costa Rica: stack, Stripe + SINPE, calendar, email/WhatsApp confirmations and Booking integration via channel manager.
Jafeth JiménezRead note
- BusinessMay 22, 20266 min
WhatsApp Cloud API setup in Costa Rica: complete step-by-step guide 2026
How to integrate the official Meta WhatsApp Cloud API in Costa Rica: Business Manager, business verification, message templates, Next.js + Vercel webhook, USD 0.0085 per-message cost and common pitfalls.
Jafeth JiménezRead note
- BusinessMay 20, 20267 min
Channel manager for hotels in Costa Rica 2026 — full guide
What a channel manager is, how to pick one, Booking vs Airbnb vs Expedia comparison, real USD costs for SaaS (SiteMinder, Cloudbeds, Hostfully) vs custom, and when each path makes sense for hotels, B&Bs and boutiques in Costa Rica.
Jafeth JiménezRead note
- BusinessMay 20, 20266 min
E-invoicing with Hacienda for restaurants in Costa Rica — technical guide
How to integrate your POS or restaurant system with Costa Rica Hacienda: ATV, certificates, XML, digital signature, realistic pricing $2,500–4,500, and the mistakes we see in production.
Jafeth JiménezRead note
- BusinessMay 20, 20267 min
How much does software cost in Costa Rica in 2026 — Complete guide
Real USD ranges by project type and by vertical (restaurants, hotels, clinics, ecommerce, fintech), what each feature includes, Costa Rica vs USA vs LatAm comparison, and how to avoid the five most common quote traps.
Jafeth JiménezRead note
- BusinessMay 20, 20266 min
How to integrate SINPE Móvil in a Costa Rica ecommerce (2026)
Real providers (Tilopay, GreenPay, ProSinpe), costs USD 1,500–3,000, the checkout friction that costs 15% in conversion, SINPE vs Stripe comparison, and when each one wins.
Jafeth JiménezRead note
- BusinessMay 20, 20267 min
WhatsApp Appointment System for Clinics in Costa Rica — Cut No-Shows by 60%
How an appointment system with automated WhatsApp Cloud API reminders drops no-shows from 25–30% to 8–10%. Costs USD 2,500–4,500, technical setup, templates, metrics, and Ley 8968 / HIPAA compliance for CR clinics.
Jafeth JiménezRead note
- AIMay 6, 20266 min
AI automation: 3 mistakes that cost real money
The three mistakes we keep seeing when a small or medium business tries to automate with AI — and how to avoid them before burning the budget.
Ulises MendezRead note
- WhatsApp · AIApr 15, 20266 min
WhatsApp + AI: when a conversational bot beats the human
Real cases where a WhatsApp conversational bot beats the human (24/7, qualification, scheduling) and cases where it kills the sale. How to decide before investing.
Ulises MendezRead note
- ProcessMar 26, 20266 min
1-week sprints: the pattern that changed our flow
Why 1-week sprints produce better software and fewer meetings than 2-week ones — with numbers from our last 12 projects.
Jafeth JiménezRead note
- EngineeringMar 4, 20266 min
Next.js, Astro or Remix: picking the stack in 2026
The framework is not the most important thing; the context is. When to pick Next.js, Astro or Remix with real cases and trade-offs without marketing.
Ulises MendezRead note
- StartupFeb 11, 20266 min
MVP in 6 weeks: the schedule that actually works
What to build first, what to leave for v2, and why pre-sales matter more than a perfect MVP. Week-by-week schedule with real data.
Jafeth JiménezRead note
03/The why
Sirius · 2026
The notes we publish translate real projects into prose — they are not SEO listicles or recycled Twitter threads.
If we haven't tested an idea in production, we don't write it. If a note doesn't answer a concrete question, we don't publish it. The editorial queue is prioritised by real demand — what people ask us most on WhatsApp becomes a note.
04/Built with
The blog runs on a modern stack.
Same stack we ship to clients — Next.js 16, Tailwind, server-rendered MDX, structured data, dynamic sitemap, llms.txt, per-locale RSS.
Framework
- Next.js 16
- React Server Components
- TypeScript 5
Styling
- Tailwind v4
- @theme tokens
- Framer Motion
Content
- Markdown + frontmatter
- gray-matter
- marked (GFM)
SEO + AI
- BlogPosting JSON-LD
- FAQPage / HowTo
- llms.txt
- bilingual RSS
05/About the blog
How this works.
We ship every two weeks. Notes are short, concrete, and tied to real cases — no listicles, no "10 reasons to…"
How often do you publish?
Every two weeks. Longer notes can take more; we prefer to ship well over to ship a lot. If three weeks pass without a new entry, assume we are cooking something long.
Who writes the notes?
The Sirius team. Each author signs their note; we do not use AI-generated content without human editing. If a note is a translation, we mark it in the header.
Do you accept guest posts or collaborations?
Only if you come from a project we have built together. We do not publish generic SEO guest posts or link exchanges. Quality is the bar, not volume.
How do I subscribe?
There's no public newsletter yet. If you want to follow the notes, send us a WhatsApp and we will reach out directly when something relevant ships. No spam, no tracking pixel.
Can I suggest a topic?
Yes, please. The editorial queue is prioritised by demand. If a question reaches us three times, we write the note.