Juan Ramón Junior Romero Cano

Remote · Early-stage startup · 5-person founding engineering team

• ▸Designed and built the platform's backend from the ground up with NestJS and TypeScript.
• ▸Owned subscription billing and payment architecture end-to-end, from data modeling through production deployment.
• ▸Architected a server-side conversion-tracking pipeline integrated with Meta Ads and Google Ads.
• ▸Modeled and administered PostgreSQL and MongoDB for event-driven inter-service communication.
• ▸Deployed and automated AWS infrastructure (ECS, Lambda, RDS, S3, CloudWatch).
• ▸Introduced unit and integration testing to improve release confidence.

Remote · Enterprise B2B SaaS · US grocery retail · 20-engineer organization

• ▸Built features for the Digital Circular, serving ~30 multi-location US grocery chains on a multi-tenant architecture (brand → sub-brand → store).
• ▸Built the dynamic theme-loading system that lets each tenant render its own branded experience.
• ▸Led the migration of components to an internal design system to keep the platform consistent.
• ▸Developed Firebase Cloud Functions integrating Birdzi, Wakefern, and eGrowcery.
• ▸Helped build the v1 admin panel; led the migration from Angular Material to PrimeNG and its re-skinning.

Remote · Early-stage startup · 2-person engineering team

• ▸One of two engineers; built the admin panel frontend with Angular and Nebular.
• ▸Built the Stripe payment gateway with Firebase Cloud Functions and Express.js (billing, upgrades, webhooks).
• ▸Built the admin panel API on Cloud Functions with NestJS, synced via Firestore with the mobile app.

Managua, Nicaragua · Agency · US-based clients

• ▸Designed and managed WordPress sites for US clients across multiple industries.
• ▸Handled server configuration and cross-browser responsive builds with Elementor.
• ▸Integrated contact forms, booking systems, and social features.

Managua, Nicaragua · Applications for NGOs

• ▸Built and maintained Django applications for NGOs (Django templates + jQuery).
• ▸Maintained Drupal-based sites for other clients.