Welcome! I'm glad you're here.

I'm Cátia, a full-stack developer who balances technical skill with human understanding.

Web DevelopmentUI/UX DesignAccessibilityCollaboration

I build intuitive, accessible web applications that combine clean user experiences with solid backend architecture. My background in education taught me to break down complexity, communicate with clarity, and design with purpose.

My approach to development is grounded in empathy, collaboration, and a strong belief that great digital experiences begin with understanding people.

And great collaborations begin with a conversation.

Shall we?

Available

Expertise

My current tech stack. I'm always expanding my toolkit and adapt quickly to new technologies and frameworks.

Front-end Development

JavaScript
TypeScript
React
Next.js
HTML
CSS
Tailwind CSS
State Management
UI/UX Design
Accessibility

Back-end Development

Node.js
Express.js
MongoDB
Mongoose
RESTful APIs
API Integration
Authentication & Security
AI Agent Development

Testing & Quality

Vitest
Cypress
ESLint

Workflow & Deployment

Git
GitHub
GitHub Actions CI/CD
Vercel
Render

Strengths

I used to lead people, solve chaos, and deliver results. Now, I bring that same energy to tech. Swipe or click to see how I turn past experience into practical results.

Collaboration & Communication

I used to

Facilitate group projects with 10-year-olds who couldn't even agree on a team name and got everyone working toward the same goal.

Proactivity & Ownership

I used to

Rewire entire lessons on the fly when things flopped, and owned the result, whether it was a breakthrough or beautiful chaos.

Adaptability

I used to

Teach through tech failures, curriculum changes, and the occasional classroom meltdown — and still got through fractions.

Quality-Driven Development

I used to

Give pop quizzes to see what stuck, then rewrote lessons to fix what didn't.

Projects

From personal initiatives to collaborations, here's a showcase of web applications I've developed. Client-focused projects coming soon.

Dog Breathing Counter App

View Live

Paw Pulse is a full-stack web application that helps dog owners monitor and track the breathing rates of dogs with heart disease.

Full-stackNext.jsTypeScriptRESTful APICI/CD

View Code

Artist-Venue Booking Platform

View Live

The Greenroom is a booking web application that connects indie artists and small venues across Germany.

Full-stackMERN StackRESTful API

View Code

Neighbourhood Helper

View Live

Alt-West Connect is a community-driven platform that connects people in Alt-West Leipzig willing to help within their neighbourhood.

Full-stackMERN StackRESTful API

View Code

Online Art Gallery

View Live

The Frame is an art marketplace where artists can showcase their work and art lovers can purchase artwork.

Full-stackReactVitestCypress

View Code

Trip Planner

View Live

TripPlanner helps you create detailed travel plans with interactive maps, activity scheduling, and budget tracking.

Full-stackReactFirebase

View Code

Text Adventure Game

View Live

Chronicles of Forgotten Lands is a modern take on classic text-based adventure games.

Front-endJavaScript

View Code

Catching Game

View Live

Oktoberfest Frenzy is a funny game where players catch falling pretzels and beers during an Oktoberfest celebration.

Front-endJavaScript

View Code

Contact

I'm always open to new opportunities and collaborations. Whether you're a potential employer, have a project idea, or just want to say hello, feel free to reach out. I'd love to hear from you.

Legal Notice (Impressum)

Information according to § 5 TMG

Cátia Monteiro

Leipzig

Germany

Contact

Email: catiamonteiro.dev@gmail.com

Responsible for Content according to § 55 Abs. 2 RStV

Cátia Monteiro

Leipzig

Germany

Liability for Content

As a service provider, I am responsible for my own content on these pages according to § 7 Abs.1 TMG. However, according to §§ 8 to 10 TMG, I am not obligated to monitor transmitted or stored third-party information or to investigate circumstances that indicate illegal activity.

Obligations to remove or block the use of information under general law remain unaffected. However, liability in this regard is only possible from the moment of knowledge of a specific infringement. Upon becoming aware of such violations, I will remove this content immediately.

Liability for Links

This website contains links to external third-party websites, over whose content I have no influence. Therefore, I cannot assume any liability for these external contents. The respective provider or operator of the linked pages is always responsible for their content.

The linked pages were checked for possible legal violations at the time of linking. Illegal content was not recognizable at the time of linking. However, permanent monitoring of the content of the linked pages is not reasonable without concrete evidence of a violation of law. Upon becoming aware of any legal infringements, I will remove such links immediately.

Copyright

The content and works on these pages created by the site operator are subject to German copyright law. Duplication, processing, distribution, or any form of commercialization of such material beyond the scope of the copyright law shall require the prior written consent of its respective author or creator.

Downloads and copies of this site are only permitted for private, non-commercial use.

Insofar as the content on this site was not created by the operator, the copyrights of third parties are respected. In particular, third-party content is marked as such. Should you become aware of any copyright infringement, please inform me accordingly. Upon becoming aware of any legal infringements, I will remove such content immediately.

Privacy Policy

1. Overview

This Privacy Policy explains how I collect, use, and protect your personal information when you use my website. I take your privacy seriously and comply with the EU General Data Protection Regulation (GDPR) and German data protection laws.

2. Responsible Party

Cátia Monteiro

Leipzig

Germany

Email: catiamonteiro.dev@gmail.com

3. Data Collection and Usage

3.1 Server Log Files

When you visit my website, Vercel (my hosting provider) automatically collects and stores information that your browser transmits to their servers in "server log files". These include:

Browser type and version
Operating system used
Website from which you visit us (Referrer URL)
Date and time of your visit
Your Internet Protocol (IP) address

This data cannot be attributed to specific persons. This data is not merged with other data sources. I reserve the right to check this data retrospectively if I become aware of specific indications of illegal use.

Vercel may transfer data to servers in the United States. This transfer is based on the European Commission’s Standard Contractual Clauses (Art. 46 GDPR), which ensure an appropriate level of protection.

3.2 Analytics

I use Umami Analytics to understand website traffic and performance. Umami is a privacy-focused, open-source analytics platform that does not use cookies and does not collect personally identifiable information. The following anonymous data is collected:

Page URL
Referrer URL
Browser type
Operating system
Device type (mobile/desktop)
Country (based on IP address)

This data is collected anonymously and is not linked to any individual. IP addresses are anonymized and not stored. No cookies or tracking identifiers are used. For more information about Umami's privacy practices, visit: https://umami.is/privacy

3.3 Contact Form

When you use the contact form, the following data is collected and processed:

Your name
Your email address
Your message

This data is processed by Formspree and is used solely to respond to your inquiry. For more information about Formspree's privacy practices, visit: https://formspree.io/legal/privacy-policy/

4. Legal Basis

The processing of your data is based on the following legal grounds:

For server logs: Art. 6 (1) (f) GDPR - Legitimate interests
For analytics: Art. 6 (1) (f) GDPR - Legitimate interests
For contact form: Art. 6 (1) (a) GDPR - Your consent

5. Data Recipients

Your data may be shared with the following service providers:

Vercel - Website hosting
Umami - Analytics
Formspree - Contact form processing

All service providers are GDPR-compliant and process data only within the EU or under adequate privacy protection measures.

6. Data Retention

Your data is stored only as long as necessary:

Server logs (Vercel): 30 days
Analytics data (Umami): 6 months
Contact form data (Formspree): Until the inquiry is answered or you request deletion

7. Your Rights

Under GDPR, you have the following rights:

Right to information about your stored data
Right to correction of incorrect data
Right to deletion of your data
Right to restrict processing
Right to data portability
Right to object to data processing
Right to withdraw consent

To exercise these rights, please contact me using the details provided above.

8. Updates to this Policy

I may update this privacy policy from time to time. The current version was last updated in June 2025.

9. Complaints

If you believe that the processing of your personal data violates data protection law, you have the right to file a complaint with a supervisory authority.