01 / About
About me
Currently building Trashie's sustainable rewards platform at Katapult Labs, shipping Stripe integrations, logistics APIs (FedEx, UPS, Happy Returns), Firebase Auth, and a React / React Native stack on Google Cloud.
4+ years across NestJS, Ruby on Rails, Node.js, and React. I've led backend migrations, shipped complex e-commerce integrations, and cut page-load times by 30% through query optimization.
Open to senior full-stack and backend roles, plus selective freelance engagements where I can make a real impact.
02 / Services
How I can help
I take on selective freelance engagements where I can genuinely move the needle. Here's where I'm most effective.
Full-Stack Web Applications
Production-ready web apps from idea to deploy.
- Next.js / React frontends with a typed design system
- NestJS or Rails backends with clean architecture
- Auth, payments, file storage, and deploys included
Backend & API Engineering
Senior backend muscle without the headcount.
- REST APIs in NestJS, Rails, or Node.js
- PostgreSQL data modeling and query optimization
- Background jobs, webhooks, and scheduled tasks
Third-Party Integrations
I ship integrations other teams stall on.
- Stripe (subscriptions, coupons, payouts)
- Shipping & returns (FedEx, UPS, Happy Returns)
- Firebase Auth, Shopify, custom webhooks
Performance & Maintenance
Make slow apps fast and keep them that way.
- DB query and N+1 hunting (30% page-load win at last audit)
- Frontend render and bundle optimization
- Monthly retainer for fixes, deps, and deploy support
03 / Work
Selected projects
A snapshot of production work. Most projects are under NDA. Context and results are what matter.
Trashie Rewards Platform
Sustainable rewards platform enabling consumers to recycle clothing in exchange for TrashieCash. Built Stripe coupon lifecycle management, FedEx/UPS/Happy Returns integrations, and Firebase Auth flows across web and mobile.
Sistema Brilla
Web platform for non-banking credits paid through gas bills. Led the Rails to NestJS migration, built PDF digital signing, and reduced page-load time by 30%.
30% faster page loads · 25% increase in user satisfaction
Doit-Center E-Commerce
Shopify-integrated e-commerce backend for a Panamanian retailer. Built multi-order logic, real-time product catalog sync, and automated inventory updates.
Whole Exome Analysis Pipeline
Desktop Python application processing human genome data through a bioinformatics pipeline, built for a university professor's research lab.
04 / Skills
Tech stack
Tools I reach for daily and frameworks I can pick up fast.
Proficient Familiar
05 / Experience
Work history
Full-Stack Engineer
Katapult Labs- Working on Trashie, a NY-based sustainable rewards platform; built Stripe coupon lifecycle management supporting the brand partner rewards network.
- Engineered logistics and returns integrations with FedEx Easy Returns, UPS, and Happy Returns enabling QR-based Take Back Bag operations at scale.
- Enhanced Firebase Authentication flows for web and mobile, improving login reliability and security.
- Developed full-stack features across React web and React Native mobile apps backed by Node.js services and PostgreSQL on GCP.
Software Engineer
Self-directed Development
- Built and maintained personal applications to deepen full-stack skills across the stack.
- Practiced backend development with NestJS, Ruby on Rails, and Python, focusing on clean architecture and robust API design.
- Explored Docker, Kubernetes, CI/CD, TDD, and dependency injection best practices.
Full-Stack Developer
Horbath Technologies- Co-led backend migration from Ruby on Rails to NestJS + Sequelize, improving scalability and performance.
- Led integrations with external store services and built PDF document processing with digital signing via NestJS and AWS S3.
- Implemented DB query optimizations achieving a 30% faster page load across the platform.
- Contributed to a 25% increase in user satisfaction through UX improvements and reduced response times.
Backend Developer
Koombea- Led core backend development for Doit-Center, a Panamanian e-commerce platform, using Ruby on Rails.
- Integrated Shopify services for real-time product catalog sync, order management, and inventory automation.
- Co-led development of multi-order logic enabling users to place multiple product orders in a single transaction.
- Led deployments to testing and production environments using AWS EC2.
Want the full picture?
Download my resume for a one-page summary of my experience and skills.
06 / Contact
Let's work together
Open to senior full-stack / backend roles and selective freelance engagements. Best way to reach me is email.