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Rafael Costa

Rafael Costa

Software Engineer & Technical Writer

Rafael is a software engineer at Lusivision who writes about web development, cloud architecture and applied AI. He has spent over a decade shipping production software for companies across Europe and enjoys turning hard technical topics into clear, practical guides.

Articles by Rafael Costa

AI SDRs in 2026: What Sales Automation Can Really Do
EN
#ai#automation

AI SDRs in 2026: What Sales Automation Can Really Do

AI sales agents promise to fill your pipeline on autopilot. Here is what an AI SDR actually does well in 2026, where the fully autonomous version falls apart, and how to deploy one that books real meetings.

4 min read
Intelligent Document Processing: From Paperwork to Data
EN
#ai#automation

Intelligent Document Processing: From Paperwork to Data

Invoices, contracts and forms still trap most business data in PDFs and inboxes. Here is how intelligent document processing works in 2026, what it actually costs, and how to pick the first workflow that pays for itself.

4 min read
How Much Does It Cost to Build an AI Agent in 2026?
EN
#ai#automation

How Much Does It Cost to Build an AI Agent in 2026?

A custom AI agent runs from $8K for a simple assistant to $150K+ for an autonomous one. Here is the honest breakdown of what drives the budget and where the money actually goes.

4 min read
Internal Tools in 2026: Build, Buy, or Retool?
EN
#business#startups

Internal Tools in 2026: Build, Buy, or Retool?

35% of teams have already replaced a SaaS tool with custom software, and 78% plan to build more. Here is how to decide between building, buying, or a low-code platform.

4 min read
AI Voice Agents in 2026: A Practical Adoption Guide
EN
#ai#automation

AI Voice Agents in 2026: A Practical Adoption Guide

By 2026 roughly one in ten support calls is handled end to end by AI voice agents. Here is where they actually work, what they cost, and how to deploy one without wrecking CX.

5 min read
WhatsApp Business API: A 2026 Integration Guide
EN
#automation#business

WhatsApp Business API: A 2026 Integration Guide

WhatsApp is where your customers already are. Here is how the Business API works in 2026, what it costs per conversation, and how to wire it into your own software.

4 min read
Migrating to Next.js 16: A Practical Upgrade Guide
EN
#web-development#performance

Migrating to Next.js 16: A Practical Upgrade Guide

Next.js 16 makes caching opt-in, turns params into promises, and swaps middleware for proxy.ts. Here is how to upgrade an App Router app without breaking it.

5 min read
Build vs Buy Software in 2026: A Decision Guide
EN
#business#startups

Build vs Buy Software in 2026: A Decision Guide

Buying SaaS looks cheaper until year three. Here is the build-vs-buy framework we use, the real total cost of ownership, and when custom software actually wins.

4 min read
Core Web Vitals in 2026: How to Finally Pass INP
EN
#web-development#performance

Core Web Vitals in 2026: How to Finally Pass INP

INP is the most failed Core Web Vital in 2026, and 43% of sites still miss it. Here is how to fix interactivity, LCP and CLS so Google can actually rank you.

4 min read
Legacy Software Modernization Without the Rewrite
EN
#cloud#web-development

Legacy Software Modernization Without the Rewrite

Full rewrites fail more often than they ship. How to modernize legacy software in phases, with the 7 Rs, the strangler fig pattern and AI-assisted refactoring.

4 min read
PWA vs Native App: Which to Build in 2026
EN
#mobile#web-development

PWA vs Native App: Which to Build in 2026

Native is not the default anymore. Here is how progressive web apps compare on cost, reach and performance, and when a native build still earns its keep.

3 min read
What a Mobile App Really Costs to Build in 2026
EN
#mobile#startups

What a Mobile App Really Costs to Build in 2026

Cross-platform apps now cost 35 to 50% less than dual-native builds. Here is an honest breakdown of what drives a mobile app budget and how to choose React Native, Flutter or native.

4 min read
Next.js SEO: An App Router Playbook That Ranks
EN
#seo#web-development

Next.js SEO: An App Router Playbook That Ranks

Most Next.js sites leave rankings on the table with a few avoidable mistakes. Here is the App Router SEO playbook we use to ship sites that Google can actually read.

4 min read
Web Accessibility in 2026: A Compliance Guide
EN
#accessibility#web-development

Web Accessibility in 2026: A Compliance Guide

The EAA is enforced and ADA Title II lands in 2026. Here is what website accessibility law actually requires, why overlay widgets backfire, and how to build it in properly.

4 min read
Why Every Startup Needs a Modern Website
EN
#startups#web-development

Why Every Startup Needs a Modern Website

A modern website is no longer a brochure. It is your most reliable salesperson, recruiter and credibility signal. Here is why it matters for early-stage growth.

2 min read
A Practical Guide to React Performance
EN
#react#web-development

A Practical Guide to React Performance

Most React performance problems come from a handful of recurring patterns. This guide covers the techniques that deliver the biggest wins with the least complexity.

1 min read
How AI Agents Are Reshaping Small Businesses
EN
#ai#automation

How AI Agents Are Reshaping Small Businesses

AI agents can now handle real, multi-step work, from support to operations. Here is a grounded look at where they help today and how to adopt them responsibly.

2 min read