Open to opportunities

Juan Ramón Junior Romero Cano

@juanramnjuniorromero

Message

I build backend systems, payment infrastructure, and full-stack SaaS products.

Nicaragua

Message

What I'm looking for

I'm looking to own meaningful backend and full-stack product areas, especially SaaS platforms, payment systems, and cloud infrastructure, while contributing autonomously within collaborative engineering teams.

I've built backend systems, payment infrastructure, and full-stack SaaS features for startups and enterprise platforms over 7+ years.

At GrowthOptix, I helped build the SaaS backend from the ground up with NestJS and TypeScript. I owned subscription billing and payments end to end, built conversion tracking for Meta Ads and Google Ads, and automated AWS infrastructure across ECS, Lambda, RDS, S3, and CloudWatch.

At Design House, I delivered features for a multi-tenant Digital Circular platform used by roughly 30 US grocery retail chains. I built tenant theme loading, Firebase integrations for retailer e-commerce providers, admin-panel features, and a reusable Storybook component library.

I've also owned subscription systems at BeApp, built a React Native on-demand services platform, developed Django applications for NGOs, and created an open-source Odoo accounting localization for Nicaragua.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

GrowthOptix

Sep 2025 - Jul 2026 (10 months)

Core member of a 5-person founding engineering team, designing and building the platform's backend from the ground up using NestJS and TypeScript. Owned the subscription billing and payment architecture end-to-end, and architected a server-side conversion-tracking pipeline integrating with Meta Ads and Google Ads.