Hi, I'm Karina Espinola

Backend Developer specialized in Laravel & APIs

I build reliable, scalable backend systems for startups and growing teams. With 5+ years of experience, I focus on clean architecture, maintainable code, and making things work smoothly behind the scenes. I love solving complex problems, improving existing systems, and constantly learning to become a better developer every day.

Karina Espinola - Full Stack Developer

šŸ’¼ Portfolio

Payment Orchestrator

Platform that routes transactions across multiple payment gateways based on dynamic business rules.

LaravelPostgreSQLDocker

Social Network API & Frontend Collaboration

Developed and maintained REST APIs in Laravel for a social networking platform, working extensively with legacy code and making structural improvements to the database.

LaravelPostgreSQLNext.js

Green Compliance Questionnaire Platform (EU)

Built the backend for a customizable questionnaire platform used by European companies to meet sustainability and "green compliance" requirements.

LaravelPostgreSQL

Payment Gateway Integration

Implemented payment gateway integrations for the backend of a social-style platform built with Node.js and Express.

Node.jsExpress.js

Digital E-Cards Platform

Developed the backend in Laravel for a digital e-cards platform, collaborating closely with a frontend built in React.js.

LaravelReact.js

WordPress & Custom Web Solutions

Built and maintained multiple websites using WordPress, ranging from standard setups to custom PHP solutions.

WordPressPHPMySQL

Technical Skills

Laravel

Laravel

Extensive experience with Laravel, leveraging its powerful features to develop clean, maintainable, and scalable backend systems.

  • ā€¢RESTful API Development
  • ā€¢Database Management
  • ā€¢Authentication & Authorization
  • ā€¢Service Architecture
API Development

API Development

Expert in designing and implementing RESTful APIs, ensuring secure, efficient, and well-documented endpoints for seamless integration.

  • ā€¢REST Architecture
  • ā€¢API Security
  • ā€¢Documentation
  • ā€¢Performance Optimization
PostgreSQL

PostgreSQL

Proficient in PostgreSQL database design, optimization, and management, utilizing advanced features for robust data handling.

  • ā€¢Database Design
  • ā€¢Query Optimization
  • ā€¢Data Modeling
  • ā€¢Performance Tuning
MySQL

MySQL

Practical experience working with MySQL in production systems, including schema design, query optimization, and maintaining legacy and modern applications.

  • ā€¢Relational database design
  • ā€¢Writing optimized queries
  • ā€¢Working with existing/legacy schemas
  • ā€¢Transactions & data integrity

Let's Connect!

Iā€™m always open to new job opportunities as well as collaborating with fellow developers and teams on meaningful projects

You can also find me on LinkedIn, where I share practical backend tips and thoughts on engineering, growth, and real-world development challenges.