Full-Stack Engineer · Founder · Builder

Marce
Billings
lea

Two-time Meta SWE intern and founder of UtzilCare - a clinic management SaaS reimagining healthcare across Latin America. Available for remote engineering roles worldwide.

Meta Intern
$25.5KFunding
20K+Lines Shipped
12+Projects
UtzilCare Doctor Dashboard Patient Monitoring M-Finder Navigation
01

UtzilCare

Healthcare SaaS · Founder

Clinic Management for Latin America

Healthcare runs on WhatsApp.
I'm changing that.

Private clinics across Latin America manage patients through notebooks and group chats. UtzilCare is their operating system - scheduling, records, billing, reminders, and analytics - built for how clinics actually work in Guatemala, Mexico, and beyond.

NSF I-Corps validated. 5 confirmed clinics on waitlist. $25,500 non-dilutive funding raised.

$25.5KRaised
150+Interviews
6Countries
5Clinics waitlisted
ReactTypeScriptNode.js PostgreSQLGraphQLAWSPrisma
Doctor dashboard Doctor Dashboard
Reminders Reminders
Consultation Consultation View
Patient monitoring directory Patient Monitoring - Directory & Risk Flags
Analytics dashboard Clinic Analytics Dashboard
02

M-Finder

iOS · Accessibility · Campus

Indoor Campus Navigation

Finding your classroom
shouldn't be a puzzle.

Accessibility-first indoor navigation app for the University of Michigan campus, built after 50+ interviews with students and staff. Real-time routing with floor-level detection and door-by-door directions.

50+User interviews
Real-timeLocation sync
Swift / iOSPHPGraphQL AWSKubernetesWebSockets
Campus floor map
Turn-by-turn navigation
03

Meta Platforms

Software Engineering · 2024 & 2025

Messenger GenAI Creations Team

Shipping GenAI features
to millions of users.

Two summers at Meta: grew from Meta University intern to GenAI Creations engineer. Shipped AI Stickers, Summarize Chat with AI, and 3 full-stack features across React, PHP, Kotlin, and Swift. Ranked top 2 intern.

20K+Lines of code
120+Pull requests
Top 2Intern ranking
MillionsUsers reached
ReactPHPGraphQL SwiftKotlinA/B TestingGenAI
Meta internship portfolio page with AI Stickers and Summarize Chat features AI Stickers & Summarize Chat - Messenger Web
AI Stickers
Type a prompt, get a custom AI-generated sticker. Built full React frontend + PHP GraphQL APIs with A/B rollout.
💬
Summarize Chat
One-click AI summary of unread threads, shipped end-to-end.
🏆
Top 2 Intern
Ranked top 2 across the entire Meta intern cohort for technical impact.
04

Web Projects

Full-Stack · React · GraphQL

Social Platform

Kudos Board

Full-stack appreciation board app where users create and share digital boards with messages, GIFs, and themed categories. Features board creation, search, filtering, sorting, upvoting, and user accounts. Deployed on Render.

React.jsMUIPrisma GraphQLGIPHY API
Kudos Board app with appreciation boards and GIFs Kudos Board - Deployed on Render
Movie Database API · Predictive Search
Personal Movie Flixer

Movie discovery app with genre filtering, favorites tracking, and a predictive search algorithm that suggests titles in real time. Integrates trailers and watched checkboxes.

HTML/CSSJavaScriptMovie DB API
Movie Flixer app with film grid and filters Movie Flixer - Responsive Movie Dashboard
Accessibility · Browser Game · Screen Reader
A11Y Quest

Browser game that teaches web accessibility through interactive challenges. Fully compatible with screen readers and keyboard-only navigation. Used in web design workshops.

HTML/CSSJavaScriptARIAScreen Readers
A11Y Quest accessibility browser game with levels and challenges A11Y Quest - Accessibility Teaching Game
05

Research

Boston Children's Hospital · 2 Publications

Clinical Research · Guatemala

Illustrated Postoperative
Instructions

Designed illustrated post-surgery instructions for Guatemalan patients undergoing reconstructive plastic surgery. Served as surgical interpreter, interview leader, and caregiver across 700+ patient interactions. Research published twice in the American Cleft Palate-Craniofacial Association journal.

2Publications
700+Patients
90%Recall rate
75%No complications
PhotoshopProcreateClinical Research
Boston Children's Hospital research - illustrated postoperative instructions and patient photo Boston Children's Hospital - Published Research
UMich School of Education · 3 Conferences

Equity Research

Anti-Racist & Culturally
Responsive Math Assessments

Conducted research on antiracist and culturally responsive mathematics assessments to reduce bias in K–12 educational measurement. Designed 150+ inclusive math problems with 25 equity-driven criteria grounded in students' lived experiences and linguistic diversity.

150+Assessments built
25Equity criteria
3Conferences
Culturally responsive math assessment examples and research methodology CMJ - Anti-Racist Math Assessment Research
Python · scikit-learn · Computer Vision
Autonomous Vehicle AI & Cancer Biopsy Classifier

Trained ML models to detect road objects and classify breast cancer biopsy cells. Achieved 95% accuracy in road object detection and high precision in cancer cell classification.

Pythonscikit-learnComputer VisionLogistic Regression
ML model results - cancer biopsy classification and vehicle detection accuracy graphs 95% Road Object Detection Accuracy
C++ · NLP · Education
Graded Word List Tool

C++ text analysis program that determines reading grade level by comparing words against grade-level vocabulary databases. Classifies 1st–12th grade difficulty for passages up to 500 words.

C++NLPData Structures
Graded Word List tool interface with grade-level output tables Graded Word List - Reading Level Analysis Tool
06

Hardware & Community

Robotics · Computer Vision · UMich Lab

University of Michigan Research Lab

Bio-Inspired
Materials Lab

Designed and programmed robotic and magnetic control systems to study soft robotics. Assembled a Dorna 2 robotic arm, built a magnetic field control system combining 3D printing, Arduino microcontrollers, and custom coils to achieve controlled bending, drilling, and translation.

ArduinoC++Computer Vision 3D PrintingRobotics
Bio-Inspired Materials Lab - Dorna 2 robotic arm and magnetic control system setup Bio-Inspired Materials Lab - UMich Research
Microgravity · AutoCAD · Arduino · 97% Accuracy
Semi-Automatic Dynamo - POSSUM13

Designed and fabricated a device that transforms energy with 15% more efficiency in microgravity. Tested on a zero-G flight. Fulfilled its purpose with 97% accuracy vs. Earth payload.

AutoCADArduinoC++Circuit Design
Semi-automatic dynamo device and microgravity testing photos on zero-G flight POSSUM13 - Zero-G Microgravity Testing
US Embassy · UVG · 5 Full-Ride Scholarships
Women in Engineering - Universidad del Valle

Led an engineering summer camp teaching young women in Guatemala through hands-on projects - circuits, 3D-printed gears, laser cutting. Partnered with the US Embassy. 5 girls received full-ride university scholarships.

TinkerCAD3D PrintingLaser CuttingCircuits
Women in Engineering camp Guatemala - girls building circuits and gearboxes Women in Engineering - Guatemala City
Biochemistry · 15 Guatemalan Samples
Effect of Altitude in Corn

Found a correlation between altitude where Guatemalan maize is grown and protein concentration. Collected 15 samples nationwide, measured with biuret and spectrophotometer. Linked high malnutrition rates to low maize protein concentration at lower altitudes.

Corn protein research - maize samples from different altitudes and concentration graphs Altitude & Protein Concentration in Guatemalan Maize
AutoCAD · CO₂ Sensors · 65% Reduction
Sustainable Wood Fire Stove - Rural Guatemala

Designed a sustainable cook stove using culturally significant materials for rural Guatemalan families. Reduced indoor CO₂ concentration by 65%, affordable at $25. Built and tested with CO₂ sensors and synthetic lung PH measurements.

Sustainable wood fire stove built from local materials with CO2 monitoring graphs Sustainable Stove - 65% CO₂ Reduction
07

Recognition

🏆
Michigan Business Challenge 2nd Place
$15,000 prize - UMich's top startup competition
💊
Pinkert Health Accelerator
$10,000 grant - Healthcare innovation funding
NCWIT Collegiate Award
Aspirations in Computing - National recognition for women in tech
🚀
NSF I-Corps Validation
150+ interviews across 6 Latin American countries
🎤
IWD Summit Speaker
Startup & Healthcare Track - Little Caesars Arena HQ, Detroit
🎓
Guatemalan Merit Scholarship
$40,000/year - University of Michigan
🎀
UROP Blue Ribbon Award
U-M Undergraduate Research Symposium
🌍
CREA 8th International Conference
Presented equity-driven assessment research
🥇
Valedictorian
Colegio Interamericano, Guatemala City - AP Capstone & International Diplomas
08

Skills

Frontend
React
4 yrs
TypeScript
4 yrs
JavaScript
4 yrs
Swift/iOS
2 yrs
Backend & Data
Node.js
4 yrs
PostgreSQL
4 yrs
GraphQL
4 yrs
Python
4 yrs
C++
3 yrs
AWS
2 yrs
PHP
1 yr
Languages & Practices
English
Native
Spanish
Native
Git / Agile
4 yrs
A/B Testing
2 yrs

From Guatemala City to Meta NY
- and back to build.

I'm a first-generation Guatemalan software engineer graduating from the University of Michigan in May 2026. I've spent four years at the intersection of technology, healthcare, equity, and community - building things that actually work for people who've been left out.

From flying in zero-gravity to test hardware I built, to surgical interpreting for children in Guatemala, to shipping GenAI features to millions at Meta - every project on this page connects to the same thread: technology should solve real problems for real people.

I'm seeking fully remote, location-independent full-stack engineering roles that let me work from Guatemala, Mexico, and beyond - and keep building UtzilCare evenings and weekends.

🇬🇹BasedGuatemala City (May 2026)
🌎AvailabilityRemote · Worldwide contractor
TimezoneCT (UTC-6), flexible overlap
💬LanguagesEnglish · Spanish
Currently Building
UtzilCare - Latin America
Clinic management SaaS. $25.5K raised, 5 clinics waitlisted. Expanding to Mexico City fall 2026 to drive sales and build medical rep partnerships.
Seeking
Remote Full-Stack Engineering
IC roles at async-first companies via international contractor structure (Deel/Remote.com). React, TypeScript, Node.js, PostgreSQL, GraphQL. Available May 2026.
09

Contact

Let's build something
real together.

Open to remote full-stack engineering roles, international contractor arrangements, and conversations about UtzilCare.