Blog

Sharing what I learn.

Articles about web development, performance and business.

Articles

Business 10 min read

Metrics that matter for dental clinics (and that the website must track)

Cost per lead, average ticket, show-up rate, conversion site to booking to consult. Real benchmarks. Plausible vs Umami. Supabase dashboard.

May 13, 2026 Read →
Tutorial 12 min read

Before/after gallery for dentistry: LGPD compliance + UX that converts

Model consent form, patient anonymization blur, lazy load with Astro Image, before/after slider in React. Code splitting. MedicalProcedure schema.

May 12, 2026 Read →
Opinion 15 min read

Why I sell websites to dentists for R$ 2,500 (and not R$ 800)

One contact lens case costs R$ 12k for the dentist, covers 5 websites. Why cheaper equals loss for both. Sales scripts without sounding arrogant.

May 11, 2026 Read →
Performance 11 min read

Local SEO for dental clinics: Google Business Profile + schema.org that works

Real case: clinic went from position 8 to 1 in 'dentist [neighborhood]' in 90 days. Complete GMB, NAP, schema, photos, reviews. Step by step, no theory.

May 10, 2026 Read →
Tutorial 13 min read

Online booking for dental clinics: complete stack with Astro + Supabase

Database schema, anti-double-booking with pessimistic lock, reminders via Resend + cron. SQL, React, Astro code. Mobile-first, production-ready.

May 9, 2026 Read →
Business 10 min read

WhatsApp Business API for dental clinics: is it worth it?

Twilio vs Z-API vs Evolution API. Setup R$ 800-2k, messages vary. Real ROI: one confirmed appointment pays the month. When yes, when no.

May 8, 2026 Read →
Tutorial 13 min read

PostgreSQL Row-Level Security beyond the basics

RLS in PostgreSQL: multi-tenant with tenant_id in JWT, SECURITY DEFINER policies, performance, debugging, avoiding deadlock. Complete guide beyond the basics, real SQL.

May 7, 2026 Read →
Opinion 11 min read

Inbound vs outbound acquisition: what works for solo devs

What actually works for solo dev acquisition? I tested inbound vs outbound for 12 months. Real numbers from blog/SEO, LinkedIn, cold email, referrals, community, events.

May 6, 2026 Read →
Tutorial 12 min read

Resend + Astro: transactional emails that don't hit spam

Send transactional emails without hitting spam. Resend + Astro Actions, automatic DKIM, React Email templates, bounce monitoring. 30-minute setup, real code included.

May 5, 2026 Read →
Performance 9 min read

Tailwind 4 in practice: what changes and when to migrate

New Oxide engine, CSS Layers, 70% smaller bundle. What matters for solo devs and when migrating a production project actually makes sense.

May 4, 2026 Read →
Opinion 9 min read

Why I fired my biggest client (and what I learned)

One client made up 40% of my revenue. I fired them in January. Three months later, revenue was higher. What nobody tells you about revenue concentration.

May 3, 2026 Read →
Tutorial 10 min read

Stripe + Supabase: recurring billing without turning into a subscription SaaS

Minimum subscription schema, payment webhook, RLS for security. Complete billing setup for projects that charge a simple monthly fee.

May 2, 2026 Read →
Business 9 min read

MEI vs Simples Nacional for freelance devs in 2026

Crossed R$ 81k in revenue? MEI no longer fits. I compared what's left in each bracket, with a real simulation for Brazilian solo devs.

May 1, 2026 Read →
Performance 7 min read

Lighthouse 100 doesn't mean your site is good

Perfect Lighthouse is an illusion. Lab data vs field data. Real users on 3G might be slow. Core Web Vitals matter.

Apr 30, 2026 Read →
Tutorial 6 min read

Edge computing in practice: middleware and redirects

Code running near users. Middleware, geo-redirects, A/B testing. Vercel and Cloudflare in production. Reduce latency fast.

Apr 29, 2026 Read →
Opinion 6 min read

Project red flags: when to say no to a client

Red flags: unrealistic budget, infinite scope, devalued work. Stories from projects I should have declined.

Apr 28, 2026 Read →
Tutorial 6 min read

N8n automations and webhooks: from zero to automatic deploy

Automate lead alerts, reminders, backups with n8n. No code, pure workflows. Cloud or self-hosted, real clinic examples.

Apr 27, 2026 Read →
Tutorial 7 min read

Frontend testing: minimum that works

Vitest + Playwright setup in 30 minutes. Unit and e2e. Test forms, navigation, critical data. Sleep knowing your site works.

Apr 26, 2026 Read →
Opinion 6 min read

Personal branding for developers in 2026

LinkedIn, blog, portfolio. 80% of my clients come from here. Build online presence that converts contracts.

Apr 25, 2026 Read →
Performance 8 min read

Zero-click search losing your traffic

68% of searches generate no clicks. Your site ranks first but gets zero visitors. Featured snippets, AI Overviews, Knowledge panels drive visibility.

Apr 24, 2026 Read →
Tutorial 8 min read

Simple design system with Tailwind

Tokens, base components, reuse across projects. Well-organized Tailwind beats heavy frameworks for solo devs delivering faster.

Apr 23, 2026 Read →
Opinion 6 min read

Freelance dev contract essentials

Essential contract clauses that protect freelance devs. Define scope, payment terms, and IP rights clearly. I learned the hard way from losing R$ 8k.

Apr 22, 2026 Read →
Tutorial 6 min read

Forms that convert: validation, UX and integration

Short forms convert more. Dual validation (client+server), loading states, specific errors, Resend.

Apr 21, 2026 Read →
Performance 6 min read

Image optimization for web: AVIF, WebP and lazy loading

AVIF/WebP formats, responsive images, lazy loading. Impact on LCP, Core Web Vitals, SEO.

Apr 20, 2026 Read →
Opinion 6 min read

Client doesn't know what they want (and that's okay)

How to extract what the client needs when they can't articulate it. Right questions, visual references, quick prototypes.

Apr 19, 2026 Read →
Tutorial 6 min read

Cloudflare as complete infrastructure

DNS, CDN, R2, Workers - how to use Cloudflare for more than just DNS. Cheap storage, edge functions, email routing all integrated.

Apr 18, 2026 Read →
Opinion 6 min read

How to price web projects without guessing

Hourly, fixed, or value-based? Calculate real cost. Estimation tips, scope based pricing.

Apr 17, 2026 Read →
Tutorial 6 min read

Deploy beyond Vercel: Cloudflare Pages, Netlify, Fly.io

Vercel is great, but it's not the only option. Practical comparison between Cloudflare Pages, Netlify, and Fly.io - real costs, limits, and when each platform makes sense.

Apr 16, 2026 Read →
Performance 8 min read

GEO: optimizing your site for AI Overviews and ChatGPT

GEO: optimize for AI Overviews. Structured data, E-E-A-T, citability, monitor impressions.

Apr 15, 2026 Read →
Opinion 8 min read

Scope: the most important skill for freelance devs

Define scope that protects both sides. Spec document, scope creep, estimation.

Apr 14, 2026 Read →
Tutorial 8 min read

Astro 5: real change in dev experience

Content Layer, Server Islands, Astro Actions. Migrated 5 projects and I'll tell you everything that changed, broke, and is worth it.

Apr 13, 2026 Read →
Tutorial 9 min read

Supabase Auth: secure authentication from zero

Email/password, OAuth, sessions, Row Level Security. Code ready to start today on real project.

Apr 12, 2026 Read →
Opinion 8 min read

Why you don't need a native app in 2026

PWAs cover 90% of cases with push, offline, install. Cost difference between native and PWA.

Apr 11, 2026 Read →
Performance 8 min read

Technical SEO for devs who hate marketing

Meta tags, sitemap, robots.txt, Schema.org. All technical, no marketing. Minimum your site needs to rank.

Apr 10, 2026 Read →
Opinion 9 min read

Client retention: how to keep what you've already sold

Post-sale for developers. Maintenance packages, strategic follow-up, why a client who refers is worth 5x a cold lead. Real numbers from a solo developer.

Apr 9, 2026 Read →
Tutorial 10 min read

TypeScript for JavaScript developers

Why TypeScript became standard in 2026. The 5 concepts that solve 80% of problems: types, interfaces, generics, union types, type inference. Setup with Astro/React.

Apr 8, 2026 Read →
Opinion 8 min read

Client onboarding: from first contact to delivery

How to professionalize your client experience. Briefing form, kick-off call, weekly checkpoints, delivery, handoff. A process that works.

Apr 7, 2026 Read →
Performance 8 min read

Core Web Vitals in 2026: what changed and what matters

INP replaced FID, LCP still reigns. CLS matters less than before. Learn to measure properly: field data vs lab data, CrUX, real user monitoring.

Apr 6, 2026 Read →
Opinion 7 min read

How to choose your niche as a solo developer

A generalist developer competes with everyone. I'll show you how to evaluate real niches by calculating ticket size, volume and client pain. Insights from aesthetic dentistry.

Apr 5, 2026 Read →
Tutorial 7 min read

Schema.org in Astro: technical SEO that works

Implementing Schema.org in Astro is straightforward. I'll show you LocalBusiness, BreadcrumbList, FAQPage and Article with real code. Rank higher on Google.

Apr 4, 2026 Read →
Opinion 8 min read

Solo dev routine: how I organize my day without burnout

Working solo without structure becomes chaos or burnout. How I split my day between code, prospecting, review and rest to keep quality and sanity.

Apr 3, 2026 Read →
Opinion 8 min read

How to build your case portfolio without lying

A generic portfolio convinces nobody. How to document real projects with numbers, process and results to close more contracts.

Apr 2, 2026 Read →
Opinion 8 min read

How to brief a web project (a guide for clients)

A bad brief is the number one cause of rework. What to include, how to organize, and what the dev needs to know before starting.

Apr 1, 2026 Read →
Opinion 8 min read

What to charge when the client asks for just a small tweak

A tweak that takes 5 minutes and a tweak that takes 5 hours. How to price maintenance, extras and scope changes without losing clients or money.

Mar 31, 2026 Read →
Tutorial 9 min read

Web accessibility: the basics every dev ignores

Alt text, contrast, keyboard navigation and semantic HTML. The minimum every site needs and most devs don't implement.

Mar 30, 2026 Read →
Tutorial 9 min read

WordPress to Astro: how to migrate without losing SEO

Step-by-step WordPress to Astro migration. Redirects, meta tags, Schema.org, and how to keep your Google rankings during the switch.

Mar 29, 2026 Read →
Tutorial 9 min read

Anatomy of a landing page that converts visitors into clients

Section structure, CTA order, copy and social proof. What every landing page needs to turn visits into real contacts.

Mar 28, 2026 Read →
Tutorial 10 min read

How I use AI to deliver web projects faster

Claude Code, ChatGPT, Gemini. AI tools I use daily to generate specs, write code, review copy, and audit SEO on real projects.

Mar 27, 2026 Read →
Opinion 9 min read

Independent dev: how to work solo without becoming an agency

You don't need a team, office, or agency brand to deliver quality projects. The independent dev model works with the right process, niche, and tools.

Mar 26, 2026 Read →
Opinion 9 min read

Why dental clinics lose patients because of their website

Aesthetic dental clinics lose R$10-15k cases due to slow sites, missing local SEO, and no WhatsApp CTA. Mistakes that could be fixed in weeks.

Mar 25, 2026 Read →
Opinion 8 min read

Template vs custom website: which one is worth it?

Templates cost less but deliver less. A real comparison between templates and custom sites for those who need results, not just an online presence.

Mar 25, 2026 Read →
Business 8 min read

Webapp vs spreadsheet: when it makes sense to invest in a web system

Is your company still running on Google Sheets? 5 signs the spreadsheet became a bottleneck, is costing more than it seems and it's time to migrate.

Mar 18, 2026 Read →
Performance 8 min read

Why I chose Astro over Next.js

I used Next.js for everything for years. Until I measured what I was shipping to the browser on projects that were basically text and images.

Mar 15, 2026 Read →
Business 9 min read

How much does a custom web system cost

Real investment ranges for landing pages, webapps, dashboards and SaaS MVPs in 2026. Open numbers per category, no 'it depends'.

Mar 12, 2026 Read →
Business 9 min read

Freelance dev, agency or software house: which one to hire

I've worked in all three models. Agency dev, software house reinforcement, and now independent. The behind-the-scenes of each.

Mar 5, 2026 Read →
Tutorial 9 min read

Supabase: the missing backend for React

Auth, PostgreSQL database, storage and realtime in a single service. How I use Supabase on AutoPars and every React webapp I build in 2026.

Feb 28, 2026 Read →
Business 8 min read

PWA: does your business need an app or a webapp?

Native apps cost R$40k+, take months and need Apple's approval. PWA delivers an app-like experience directly in the browser.

Feb 20, 2026 Read →
Business 9 min read

MVP: how to build a web product from zero to deploy

The real process of taking an idea from paper to production in weeks. I've seen a R$25k MVP validate what a R$200k project got wrong.

Feb 14, 2026 Read →
Opinion 8 min read

How I use AI in web development (no hype)

Where AI actually helps, where it gets in the way, and why it doesn't replace knowing how to code.

Feb 7, 2026 Read →
Tutorial 8 min read

React or Astro: how to choose the right stack for your project

Interactive webapp calls for React. Static site calls for Astro. But what when the project mixes both? Criteria I use on every project.

Jan 30, 2026 Read →
Performance 8 min read

Why your website loads slowly (and how to fix it)

Heavy images, unnecessary JavaScript and bad hosting. The 3 most common reasons your site loads slowly and a step-by-step fix for each one.

Jan 22, 2026 Read →
Tutorial 9 min read

Technical SEO every developer needs to know

Meta tags, Schema.org, sitemap, Core Web Vitals. What the dev needs to deliver so the site doesn't depend on a marketing agency.

Jan 15, 2026 Read →
Tutorial 9 min read

Integrations: how systems talk to each other

APIs, webhooks and automations in practice. How I connected payment, shipping, WhatsApp and email on AutoPars with 5 integrations.

Jan 8, 2026 Read →
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