I build custom software and AI-powered automations

Ze Lu Sottomayor

I'm Ze Lu Sottomayor, a full-stack developer based in Lisbon.

I build AI-powered tools and automation systems for founders and small teams. Most of my work involves connecting existing tools, building custom workflows, and creating web applications that solve specific problems.

I've worked on projects ranging from AI coaching apps to UX analysis tools, always focusing on practical solutions that work in production.

What I'm doing now

I'm currently doing freelance development while building my own products. My recent projects include UX Audit App (an AI-powered UX analysis tool) and AI Talk Coach (a speaking practice app using Claude).

Most of my work falls into two categories:

1. **Automation projects** - connecting tools like Airtable, Notion, and various APIs to eliminate manual data work.
2. **Product development** - building functional web apps with Rails, integrating AI APIs, and getting things to production quickly.

How I work

  • I build working prototypes first, then refine based on real usage
  • Every project has clear deliverables and milestones - no vague promises
  • I prefer tools and approaches I know work, rather than chasing trends

Expertise

  • Full-stack development (Ruby on Rails, JavaScript, Python)
  • AI integration (Claude API, OpenAI, prompt engineering)
  • Automation tools (Make, Zapier, n8n, API integrations)
  • Product design and user experience

Credentials

  • 3 years deep in building, breaking, and shipping web applications and automation systems
  • Built and launched products like UX Audit App, AI Talk Coach, Signal Harvester, and various client tools
  • Obsessive learner — constantly experimenting with new AI tools, frameworks, and approaches to find what actually works
  • Based in Lisbon, working with clients remotely

When I'm not coding, I'm usually exploring Lisbon or testing new AI tools to see what's actually useful versus what's just hype.

I believe good software solves real problems without unnecessary complexity.

Have a project in mind?

Let's discuss how I can help.

Schedule a call Email me