Alan Quintero - Software Engineer

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About Me

Hi! I’m Alan Quintero, a Senior Software Engineer focused on backend systems and high-scale infrastructure.
I specialize in Java, and I enjoy building scalable services, reliable integrations, and performance-critical systems that hold up under real production load.
I care about clean architecture, operational reliability, and measurable improvements—whether that means reducing latency, simplifying complex workflows, or making systems easier to maintain.
I’m driven by continuous learning and I like working on problems where thoughtful design and execution directly translate into better product outcomes.

Work authorization: U.S. citizenship


Contact Details
  • Meta logo

    Meta

    Remote (Menlo Park, CA)
    November 2020 to April 2025
    Meta products

    Role: Senior Software Engineer

    • Led integration of Facebook Memories feed into the Messenger’s Friends tab , by extending existing backend services and developing Android UI components, contributing to a 10% increase in time spent.
    • Engineered core WhatsApp Android messaging infrastructure to support Meta AI features by extending send/receive workflows and adding encryption/decryption paths while maintaining backwards compatibility and reliability.
    • Reduced WhatsApp Android message send latency by 20% through A/B testing and performance optimizations (parallelization, caching, batching), enabling group size scaling from 256 to 1024 participants. .

    • Skills: Android | Java 10 | Kotlin | JUnit | Espresso | Git | Jetpack Compose | Hack
  • Bind logo

    Bind On-Demand Health Insurance

    Remote (San Francisco, CA)
    May 2020 to October 2020

    Role: Software Engineer

    • Improved backend services for a healthcare insurance platform supporting medical claims processing (Java 11, Spring Boot, AWS).
    • Reduced SonarQube code issues 85% by refactoring bug-prone logic and eliminating duplicated code.
    • Automated integrations with a third-party .NET vendor system, reducing manual deployment work and improving operational efficiency.

    • Skills: Java 11 | Spring Boot | Gradle | AWS | JUnit 4 | Jenkins | Sumo Logic | Git | SonarQube
  • Zume logo

    Zume

    Mountain View, CA
    September 2019 to March 2020

    Role: Software Engineer

    • Built TypeScript microservices supporting a new pickup experience for a pizza delivery platform and integrating with existing ordering workflows.
    • Developed a production-ready Vue.js demo application used by sales teams to showcase the pickup flow, with automated tests for reliability.

    • Skills: TypeScript / JavaScript | Express.js | Vue.js | Jest | Redis | Git | JSON
  • Talix logo

    Talix

    Hybrid (San Francisco, CA)
    September 2018 to August 2019

    Role: Software Engineer

    • Improved a medical NLP engine that extracts clinical concepts from unstructured records and maps them to ICD-10, CPT, and HCPCS codes.
    • Increased multi-word concept recognition accuracy by 5% by optimizing Trie construction and phrase matching in the NLP pipeline.
    • Improved concept recognition precision by 3% by enhancing parsing of special characters in clinical documentation.

    • Skills: Java 7 | JUnit | Apache OpenNLP | CVS | Oracle SQL | Tomcat
  • Infosys logo

    Infosys (client: Apple)

    Sunnyvale, CA
    June 2017 to September 2018
    Apple logo

    Role: Technology Analyst

    • Built a Java REST microservice serving as middleware for internal systems and ETL pipelines during an Oracle to NoSQL migration, enabling scalable data exchange.
    • Reduced API latency by 30% by optimizing transformation logic, eliminating redundant downstream calls, and caching frequently used mappings.

    • Skills: Java 8 | REST | Maven | JSON | JUnit 4 | Mockito | Git | Tomcat
  • Mexico logo

    IT Consulting (clients: Charter | USAA | General Electric)

    Mexico
    January 2015 to May 2017

    Role: Software Developer

    • Delivered Java backend solutions for enterprise clients including GE (desktop-to-web migration), USAA (motorcycle insurance claims platform), and Charter (ad scheduling optimization system).
    • Built REST APIs using Spring MVC / Spring Boot with Hibernate, integrating with Oracle and MySQL databases.
    • Improved code quality and delivery reliability through unit and integration testing (JUnit, Mockito, Selenium), code reviews, SonarQube standards, and CI pipelines in Jenkins.
    • Led small feature teams and mentored interns, improving onboarding and engineering practices.

    • Skills: Java | Spring MVC | Spring Boot | REST | Hibernate | Maven | JUnit | Mockito | Selenium | Git | Oracle SQL | MySQL | SonarQube | Jenkins
    Mexico clients logo

Skills

Back-end

Java | Spring Framework | RESTful APIs | Microservices | Hibernate | JDBC


Mobile Development

Android (Kotlin | Java) | Jetpack Compose | Android SDK | XML


Application Servers & Containers

Docker | Apache Tomcat | Jetty


Operating Systems

macOS | Linux | Windows

Front-end

JavaScript | TypeScript | Vue.js | Express.js | Bootstrap | HTML5 | CSS3 | AJAX


Cloud Platforms

AWS | Heroku | Cloudflare


Methodologies

Agile (Scrum)


Languages

English: Advanced
Spanish: Native

Testing

JUnit | Mockito | Selenium | Espresso | Jest


Database & Storage

MySQL | Oracle PL/SQL | Redis


Tools & CI/CD

Git | Maven | Jenkins | SonarQube | Swagger | Google Checkstyle | Jira


IDEs

Android Studio | Eclipse | IntelliJ IDEA | WebStorm | Spring Tool Suite | NetBeans

  • UAA logo

    Bachelor's Degree

    Universidad Autonoma de Aguascalientes

    Aguascalientes, Mexico
    August 2010 to December 2014

    B.S. in Computer Systems Engineering

Certifications

Android certification
Java 6 certification

Awards

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Projects


More About Me

I am a responsible, disciplined, and dedicated person who believes the key to success is to never stop learning. I love discovering something new every day and continue working step by step toward turning my dreams into reality.

In my free time, I enjoy reading books, exercising, watching movies/series, and traveling whenever I get the chance.

My favorite quote: "Success is not about speed, but about steady and consistent effort."


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