I'm a full-stack engineer from the Dominican Republic with 4 years of experience building production apps — mostly React and React Native on the frontend, and the APIs and integrations behind them.
Right now I work at Ualett, a US fintech serving 100K+ active clients, where I build the mobile and web frontend and connect the product to the platforms around it.
- Frontend at scale — React and React Native screens for a product with 100K+ active users.
- Enterprise integrations — connected our core system to HubSpot CRM so the support team could work from one fast interface. Previously integrated Zoho CRM with Deluge.
- International remittances — money transfers across the Dominican Republic, Colombia and Mexico corridors on top of Cybrid's API: webhooks, reconciliation and queue-based sync with Redis.
- Clean Architecture — layered backends with clear boundaries, CQRS and state machines where they earn their place.
Frontend: React · React Native · Next.js · Vite · TanStack Query Backend: Node.js · NestJS · ASP.NET Core (C#) · MongoDB · Redis · BullMQ Integrations: HubSpot · Zoho CRM (Deluge) · Cybrid API · Twilio · Webhooks · Azure Form Recognizer
- Cut page load times by 20% on a patient-facing healthcare platform (Next.js).
- Cut manual document validation by 50% for legal workflows at major Dominican banks, using Azure Form Recognizer.
- Mentor junior developers on React through pair programming.
Most of my day-to-day work happens in private repositories on my work account, @maycolperez-blip. The code isn't public, but the activity is — this graph combines both of my accounts:
📫 Open to remote opportunities · maycolforbusiness@gmail.com