Full-Stack Engineer

Abisai Herrera

Software Engineer driven by curiosity and innovation. Turning lines of code into products that matter.

Profile

About Me

Software Developer with proven experience in projects for Mabe Global, developing scalable web solutions for e-commerce across Latin America and Canada. Successfully led enhancements to administrative platforms for Casas del Migrante in Guatemala, improving data collection efficiency by over 70%. Skilled in Java, Python, JavaScript, HTML, and CSS, with strong emphasis on performance, usability, and code quality. Quick to adapt to new technologies and known for delivering innovative solutions in multidisciplinary teams. Currently seeking opportunities to contribute to impactful tech projects and grow in challenging environments.

Career

Experience

August 2021 – Present

Senior Commerce FullStack Developer (Outsourcing)

Enapsys (Ciancoders), CDMX, México

Designed and implemented key features in e-commerce platforms using SAP Commerce, optimizing user experience and increasing conversion rates for brands such as Mabe Global, GE Appliances Canada, Shasa Mexico, and Nutec.
Led the development of platforms for GE Profile Mexico and GE Profile Colombia, ensuring scalability, high performance, and on-time delivery in coordination with technical and business teams.
Developed a modern Angular storefront for Monogram Canada and Latin America, significantly enhancing the user interface and navigation experience across mobile and desktop devices.
Implemented critical integrations including payment gateways, order replication, business services with Cloud Hot Folder, and CI/CD tools; also contributed to SAP Commerce version upgrades to keep the platform up-to-date and secure.
Built backend solutions with Spring Boot for Estafeta Mexico, including a web service for OpenText, a file orchestrator (CSV to XML), and a log automation tool, optimizing data flow and operational traceability.

November 2020 – August 2021

FullStack Developer

Ciancoders, Quetzaltenango, Guatemala

Developed a secure and efficient REST API to handle requests, approval workflows, and internal notifications, improving traceability and interdepartmental coordination, with Azure Active Directory authentication integration.
Contributed to enhancements in Prenda Crédito’s loan management system using Django REST Framework and React, implementing key features for handling difficult collections and improving overdue account control.
Developed and maintained a React Native mobile application for Prenda Crédito, enabling financial advisors to access critical client and credit status information in the field.
Collaborated in agile environments with QA and UX/UI teams, ensuring iterative deliveries aligned with business goals and end-user needs.

January 2020 – Present

Freelance Backend Developer

Freelance Developer, Guatemala

Technically designed and developed the backend of the Migrant Flow Control System for Casa del Migrante Guatemala, achieving a 70% reduction in migrant registration time through automation and digitalization.
Implemented an administrative platform for Mujeres Transformando el Mundo using Django, focusing on efficiency, functionality, and ease of use for the organization’s administrative team.
Took full ownership of the backend development lifecycle as a freelancer, from design to testing, demonstrating the ability to deliver high-quality, end-to-end solutions independently.
Wrote modular and reusable code, including libraries and utilities that support long-term scalability and maintainability.
Designed robust, optimized databases and developed Django REST Framework APIs, enabling seamless integration with external services and enhancing system interoperability.

November 2024 – October 2025

FullStack Developer

Freelancer for Agropecuaria Popyan/USAID, Guatemala

Development of key features with NestJS and Next.js for an agricultural management platform, improving operational efficiency and user experience.
Redesign of the web application using Tailwind CSS, achieving a more intuitive and attractive interface that facilitated navigation and usage by users.

Featured work

Projects

I have participated in a variety of projects, mainly web development in e-commerce and administrative management areas. Here are some highlights:

Project link

GE Appliances Canada

E-commerce website for GE Appliances in Canada, averaging over 100,000 monthly visits. I participated in the development of key features, order processes, and user experience optimization.

Java SAP Commerce Spring JavaScript HTML Less SQL Server

Project link

GE Profile Mexico and Colombia

E-commerce platforms for GE Profile in Mexico and Colombia, focused on selling premium appliances. Responsible for implementing both sites, with an emphasis on optimizing user experience and improving the efficiency of the purchase process.

Java SAP Commerce Spring JavaScript HTML Less SQL Server

Project link

Migrant Flow Control System

Web application designed to streamline the registration and management of migration flows, significantly reducing processing time. Responsible for backend development, including the implementation of a REST API, database design, and optimization of the application architecture. Implemented nationwide at Casa del Migrante Guatemala and Pastoral Movilidad Humana.

Python Django DRF React PostgreSQL Docker

Project link

Chapinismos.org

Complete dictionary of Guatemalan slang, words, idioms and typical expressions from Guatemala with definitions, examples and correct usage.

Astro TypeScript Tailwind CSS

Project link

Easy IP Finder

Chrome extension that emerged from the need in my work to constantly check the public IP address to request access to my company's test sites. With a single click on your browser’s toolbar, you can instantly view your public IP address, whether IPv4 or IPv6! But there’s more: my tool enhances your online experience by allowing you to copy your IP address directly to the clipboard from the popup window.

JavaScript HTML CSS Chrome Extension API

Project link

$Tigo Infracloud$

Tigo Infracloud

ITID Requirements Tool is a platform where the IT Infrastructure Delivery team can standardize, manage, prioritize, and balance the workload of requests made by different Tigo departments for servers or resource expansions on existing infrastructure.

Java Spring Boot Angular OracleDB Azure Active Directory Docker