Senior Frontend Engineer · Málaga

Hi, I’m David. I build React and TypeScript apps that teams rely on.

I’ve spent 14 years in tech, the last 5+ as a frontend engineer building enterprise React and TypeScript apps, most recently as a Senior Software Engineer at Caterpillar. I lead projects across product, data and engineering, and I use AI tools to ship faster and help my team do the same. Before that, I spent 8 years engineering large-scale telecom systems at AT&T.

See my projects Get in touch

Projects

Recent work from my day job and this site’s rebuild.

This Portfolio
2026
The site you're on, rebuilt from scratch with Next.js 16, typed MDX content and tests that run on every pull request.
- Next.js
- React
- TypeScript
- Tailwind CSS
- MDX
Code for This Portfolio
Unified View
Caterpillar · 2026
A redesign of the main Customers page so dealers can act on customers, users and assets from one place.
- React
- TypeScript
- Component library
Create React App to Vite
Caterpillar · 2026
Helped move a production React app from Create React App to Vite, and found the root cause of a critical bug the move exposed.
- React
- TypeScript
- Vite
S3 Storage Cleanup
Caterpillar · 2025
Added lifecycle and deletion policies to a shared CloudFormation template, cutting stored deployment artifacts by over 98%.
- AWS
- CloudFormation
- S3

Archive

Earlier projects from my move into frontend.

COVID-19 Tracker
2020
Tracks infected, recovered and death counts around the world.
- React
- Material UI
- Chart.js
Code for COVID-19 Tracker Live demo of COVID-19 Tracker
Hacker News Clone
2020
A Hacker News reader with routing, context and code splitting.
- React
- React Router
- JavaScript
Code for Hacker News Clone Live demo of Hacker News Clone
Mobile Flashcards
2019
A React Native app for studying with decks of cards and quizzes.
- React
- React Native
Code for Mobile Flashcards
My Reads
2018
A bookshelf app for sorting books into shelves and searching for new ones.
- React
- JavaScript
Code for My Reads Live demo of My Reads
Would You Rather
2018
A polling game where players answer and ask "would you rather" questions.
- React
- Redux
Code for Would You Rather Live demo of Would You Rather

Experience

2025
Senior Software Engineer, Frontend
Caterpillar
Led Unified View: the redesign of the main Customers page across product, data and engineering.
2022
Software Engineer, Frontend
Caterpillar
Built the Admin Tool UI from Figma designs, mentored new engineers and led a cross-team project that earned a promotion.
2020
Front-End Web Developer
Interfirst Mortgage Company
Moved the main website to HubSpot CMS.
2017
Senior Member of Technical Staff
AT&T
Introduced and supported VoLTE, WiFi calling and video calling on large-scale telecom networks.
2012
Member of Technical Staff
AT&T
Implemented cloud virtualization on an IMS platform and analyzed calls over SIP and RTP.

Education and certifications

AWS Certified AI Practitioner
AWS
2025
React Nanodegree
Udacity
2019
Front-End Web Developer Nanodegree
Udacity
2015
Master's in Information Technology and Management
Illinois Institute of Technology
2012
Ingeniero de Telecomunicación
Universidad Politécnica de Madrid
2012

Contact

Always looking for the next challenge. The best way to reach me is by email.

contact@davidaguirre.tech