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ALAN ALBERTENGO

Senior / Staff Full Stack Engineer (Java + React)
Distributed Systems • High-Scale Platforms • Performance & Architecture
📍 Argentina (Remote) 📧 alan.albertengo@gmail.com 📱 +54 9 351 256-3753 🛂 EU Passport • B1/B2 Visa 🌐 Spanish (Native) • English (Fluent) 💼 linkedin.com/in/alan-albertengo 💻 github.com/regMeet

Professional Summary

Senior Full Stack Engineer with 18+ years of experience designing, building, and scaling complex systems across fintech, airlines, e-commerce, and government platforms.

Strong background in backend architecture, frontend engineering, and distributed systems. Proven ability to build systems from scratch, define APIs and data models, and take products from early stages to production.

Experienced in improving performance, scalability, and reliability, including reducing critical latencies from minutes to seconds in high-volume environments.

Core Expertise

Distributed Systems & Microservices
Backend Architecture (Java, Spring Boot)
Frontend Architecture (React, Redux)
API Design & Integrations (REST / SOAP)
Performance Optimization & Scalability
Concurrency & Multithreading
Database Design (SQL / NoSQL)
Caching Strategies (Redis)
High Availability & Reliability
Observability & Monitoring (Datadog)
CI/CD & Production Systems

Professional Experience

eWorldES Aug 2024 – Present
Senior Full Stack Engineer
Project: PAIS (Public Assistance System) – State of Hawaii (DHS)
  • Reduced critical API response times from 2+ minutes to under 3 seconds, improving user experience in high-volume application flows.
  • Designed and implemented multi-threaded processing and multi-layer caching strategies to support scalable 24/7 services.
  • Identified and resolved N+1 queries, memory leaks, and bottlenecks under concurrent load.
  • Improved frontend performance and accessibility (WCAG compliance).
  • Contributed to system stability and reliability in a mission-critical government platform.
Tech: Java 21, Spring Boot, Hibernate, Oracle, Redis, Multithreading, Datadog
Santex S.A. Jul 2015 – Jul 2024
Senior Software Engineer / Tech Lead
High-scale fintech and real-time platforms for US clients
  • Designed and built full-stack systems from scratch (Java + React), including architecture, APIs, and database modeling.
  • Implemented batch processing, queues (Redis), cron jobs, and scalable backend services.
  • Led technical decisions, estimations, and system design for multiple projects.
  • Built integrations with external platforms (Mercado Libre, Facebook, Google, GoDaddy APIs).
  • Developed reusable SDKs and component libraries across frontend applications.
  • Contributed to production support, debugging, and system stability in live environments.
D3 Banking Platform
  • Built a customizable digital banking platform used by multiple financial institutions.
  • Developed extensible architecture for payments, crypto features, and modular add-ons.
Pivotus Ventures (BFF)
  • Developed a real-time chat system using WebSockets.
  • Built web (agents) and mobile (customers) applications with shared SDK and component library.
Mercado Libre – Mercado Shops
  • Designed backend services and microservice architecture.
  • Built bulk product processing system using queues and background jobs.
  • Implemented integrations with payment, domain, and SaaS platforms.
Tech: React, Redux (Saga/Thunk), React Native, Java, Spring Boot, Redis, MySQL, Jenkins, CI/CD
AppDirect 2015
Senior Software Engineer
  • Developed customizable SaaS marketplace platforms.
  • Built reusable UI components and backend services.
Tech: Java, Spring, Backbone.js, MySQL
Hewlett-Packard (HP) 2012 – 2015
Senior Software Engineer
Project: American Airlines
  • Designed and built a real-time notification system for flight events (SMS, email, voice).
  • Worked on event-driven systems using Tibco for real-time processing.
  • Provided 24/7 production support, debugging live critical systems.
  • Built backend services and admin web applications from scratch.
Tech: Java, Spring MVC, Hibernate, Oracle, WebSphere, Tibco

Earlier Experience — Vates / Globant / Gameloft

2008 – 2012
Worked on performance optimization, backend services, and large-scale applications.

Tech Stack

Backend: Java (5–21, since 2005), Spring Boot, Hibernate, Microservices
Frontend: React, Redux, React Native
Databases: Oracle, MySQL, SQL Server, Redis
Tools: Jenkins, Git, CI/CD pipelines
Other: REST APIs, WebSockets, Multithreading

Education

Informatic Engineer — Instituto Universitario Aeronáutico
Oracle Certified Associate – Java SE 7 Programmer

Key Strength

Equally effective at building systems from scratch and at stabilizing and scaling them in production. Trusted in early-stage architecture and in fixing mission-critical systems already running at high volume — with a focus on reliability, performance, and long-term maintainability.