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Efrain Landaverde

@efrainlandaverde

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Product Engineer at Savvy Post Marketing building SaaS products and a Flutter mobile app with a Laravel backend.

El Salvador

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At Savvy Post Marketing, I design SaaS, web, and mobile product architecture and build APIs and integrations. I built a mobile app end to end in Flutter with a Laravel backend, and I’m working on refactoring an AI pipeline built on the OpenAI API.

At Diario El Salvador, I developed and maintained high-traffic news sites and built the ePaper platform as a PWA with Next.js and NestJS. My projects include Rentia, a rental management SaaS with a mobile app and web admin panel, and xpot.sv, Diario El Salvador’s digital magazine.

Experience

Work history, roles, and key accomplishments

Current

CTO / Full Stack Developer

Current

Savvy Post Marketing

Dec 2024 - Present (1 year 11 months)

Designs architecture for SaaS products, web and mobile apps, and defines technology roadmap. Builds APIs and integrations with POS systems, payment gateways, logistics services, and marketing platforms.

React Next.js Laravel NodeJS NestJS Flutter OpenAI API AI Cloud Services Security Backup Cybersecurity

Webmaster & Full Stack Developer

Diario El Salvador

May 2023 - Dec 2024 (1 year 7 months)

Developed and maintained high-traffic news sites, improving stability, availability, and load times. Implemented headless architectures with GraphQL APIs and Next.js frontends, and built the ePaper platform as a PWA.

Next.js NestJS GraphQL PWA Cloudflare Security Performance Optimization WordPress

Backend Developer Sr.

IdeaTech

Mar 2022 - Jan 2024 (1 year 10 months)

Developed APIs for a lending and payments financial platform using Node.js, Express, Knex, and PostgreSQL. Built the web side with Next.js and maintained client projects with PHP and Laravel.

NodeJS Express Knex PostgreSQL AWS RDS Next.js PHP Laravel

Lead Developer

DIVE Digital Experience

Jul 2019 - May 2023 (3 years 10 months)

Led the development team, including planning, technical sales proposals, analysis, and prototyping. Built e-commerce sites with WordPress/WooCommerce integrating multiple payment gateways and developed hybrid apps, management systems, and AR experiences.

WordPress WooCommerce Stripe PayPal Wompi Pagadito BAC Hybrid Apps Spark AR CPanel Google Cloud Platform DigitalOcean

Frontend Developer

YTTOR

Nov 2020 - May 2022 (1 year 6 months)

Developed PHP/MySQL and WordPress projects, plus interactive applications. Built an interactive map viewer with ArcGIS for a government institution and planned team tasks and deliveries.

PHP MySQL WordPress ArcGIS JavaScript HTML CSS