Hi, I'm

ALEJANDRO BERMUDEZ

SOFTWARE
ENGINEER

Specialized in Backend with Node.js & Frontend with React, Angular, Astro

About Me

Experienced Software Engineer specializing in backend development with Node.js, Express.js, and NestJS. Expert in frontend technologies including React, React Native, Angular, and Astro with Atomic Design principles. Strong background in microservices architecture, REST API development, WebSockets, and web scraping.

6+

Years of Experience

20+

Projects Completed

10+

Technologies

4

Certifications

EFSET English Certificate (B2)

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Node.js Course - MongoDB & WebSockets

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TypeScript Course - OOP & Asynchronism

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Backend with Node.js - REST API

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Education

Software Engineering

Universidad Técnica Particular de Loja (UTPL)

2013 - 2018

Languages

Spanish

Native

English

B1-B2 (Upper Intermediate)

Technical Skills

Backend

Node.js Express.js NestJS

Frontend

React React Native Expo Next.js Angular Astro TypeScript

Databases

MongoDB PostgreSQL MySQL

Cloud & DevOps

AWS Docker CI/CD

Architecture

Clean Architecture TDD DDD Microservices

Professional Experience

Software Engineer

POSSUMUS

Argentina

July 2023 - Present

Responsibilities

Developed and maintained backend services using Node.js, Express.js, and NestJS
Implemented microservices architecture with REST APIs and WebSocket connections
Built frontend applications using React, Angular, and Astro with Atomic Design principles

Key Achievements

Applied Clean Architecture, TDD, and DDD methodologies for scalable solutions
Optimized database performance with MongoDB, PostgreSQL, and MySQL
Implemented CI/CD pipelines and cloud deployment strategies

Backend Developer

YABOK TECHNOLOGY

United States

November 2021 - July 2023

Responsibilities

Developed MagicFlex app backend from startup to production
Created REST APIs with high user demand and implemented best practices
Built microservices and WebSocket implementations for real-time features

Key Achievements

Performed web scraping with Puppeteer and Playwright for data automation
Implemented email and SMS automation systems
Used AWS services including Cognito, S3, Lambda, and Amplify

Full Stack Developer

Workana

Argentina

January 2021 - December 2022

Responsibilities

Developed web pages, landing pages, and e-commerce solutions independently
Built complete full-stack applications using React and Express.js

Key Achievements

Implemented user authentication with AWS Cognito and React Native
Applied Atomic Design principles for component-based development

Full Stack Developer

How We Do

Argentina

January 2020 - July 2021

Responsibilities

Developed React Native applications for mobile platforms
Created REST APIs with AWS Amplify and Express.js

Key Achievements

Implemented real-time features and user authentication systems

Featured Projects

Full Stack

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MagicFlex App

Full-stack platform where I participated in backend and frontend development. I collaborated on implementing a scalable microservices architecture with REST APIs, WebSocket connections for real-time functionality, and automated web scraping systems. Tech stack: Node.js, Express.js, React, and AWS services for high-availability production deployment.

Technologies:

Node.js Express.js React WebSocket AWS +4

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Mobile App

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Enjoy App

Comprehensive mobile application for booking travels, hotels, parking, and car rentals in the United Kingdom. Developed with Expo and React Native applying feature-first architecture, TDD, DDD, and Atomic Design. Uses Auth0 for authentication and optimized state management with Zustand for a smooth and efficient user experience.

Technologies:

Expo React Native TypeScript Zustand Auth0 +3

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Mobile App

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Crypto Wallet España

Cryptocurrency trading wallet designed for the Spanish market with real-time WebSocket connections. Developed with React Native applying MVP architecture and Atomic Design principles. I collaborated on implementing instant price update systems, transaction notifications, and secure crypto portfolio management.

Technologies:

React Native TypeScript WebSocket Real-time APIs Atomic Design +1

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Mobile App

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App de Buses Argentina

Cross-platform mobile application for comprehensive bus transportation management across multiple Argentine provinces. Developed with Ionic and Angular, offers real-time route queries, updated schedules, seat availability, and ticket reservation system. I collaborated on implementing geolocation to find nearby stops and arrival notifications.

Technologies:

Ionic Angular TypeScript Geolocation Real-time Updates

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Backend

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Migración Microservicios Gasolineras

Architectural migration from legacy monolithic system to scalable microservices for multinational gas station company. I collaborated on developing multiple specialized REST services with NestJS and TypeScript, participated in implementing real-time rewards and cashback system integrated with mobile application, and contributed to maintaining zero downtime during transition.

Technologies:

NestJS Microservices REST APIs Real-time Systems TypeScript +1

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Full Stack

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App Banco Argentino

Comprehensive mobile banking application for personal loan management and rewards program for an Argentine bank. Developed with React Native, Express.js, and Python, includes advanced real-time document upload and validation system with OCR, asynchronous request processing, and push status notifications. I collaborated on developing these features as part of the team.

Technologies:

React Native Express.js Python Real-time File Upload TypeScript +1

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