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Resume

Christopher Hacia • Full-Stack Developer

Skills

Backend
Node.js
Express.js
PHP
Python
Java
REST APIs
GraphQL
Database
PostgreSQL
MySQL
MongoDB
Redis
Elasticsearch
DevOps
AWS
Docker
Kubernetes
Jenkins
GitHub Actions
CI/CD
Nginx
Linux
Frontend
JavaScript
TypeScript
React
Redux
Next.js
Angular
Vue.js
HTML5
CSS3
Sass/SCSS
Tailwind CSS
Material UI
jQuery
Backbone.js
Soft Skills
Team Leadership
Mentoring
Agile/Scrum
Code Review
Technical Documentation
Cross-functional Collaboration
Testing
Jest
Mocha
Cypress
Playwright
Selenium
PHPUnit

Experience

Senior Software Engineer

Walmart

Sep 2025 – Present

Remote

  • • Full-Stack development working with NextJS / React / TypeScript / GraphQL

  • • e2e integration and unit testing with Jest / React Testing Library / Selenium

  • • ADA compliance development, PCI compliance development, SDLC practices

  • • Built and deployed new features within the Walmart.com ecosystem

React
TypeScript
JavaScript
GraphQL
Redux
HTML
CSS

Senior Software Engineer

John Deere
Contract

Aug 2023 – Dec 2024

Remote

  • • Developed responsive UIs with Angular 17+, emphasizing accessibility and performance.

  • • Built data processing with Node.js Lambdas on AWS (Lambda + API Gateway) into MongoDB/PostgreSQL stores.

  • • Maintained legacy integrations in PHP (Zend) and Python; refactored modules for readability and testability.

  • • Kept unit tests running in Jasmine/Karma and Pytest, enforced via GitHub Actions.

  • • Mentored junior engineers via code reviews and architecture walkthroughs.

Angular
Node.js
AWS Lambda
API Gateway
MongoDB
PostgreSQL
PHP
Python
Jasmine
Karma
GitHub Actions

Senior Software Engineer

Blackline Safety
Contract

Apr 2022 – Aug 2023

Remote

  • • Developed responsive UIs with Angular 17+, emphasizing accessibility and performance.

  • • Built data processing with Node.js Lambdas on AWS (Lambda + API Gateway) into MongoDB/PostgreSQL stores.

  • • Maintained legacy integrations in PHP (Zend) and Python; refactored modules for readability and testability.

  • • Kept unit tests running in Jasmine/Karma and Pytest, enforced via GitHub Actions.

  • • Mentored junior engineers via code reviews and architecture walkthroughs.

Angular
Node.js
AWS Lambda
API Gateway
MongoDB
PostgreSQL
PHP
Python
Jasmine
Karma
GitHub Actions

Software Engineer III

Facebook (Meta)
Contract

Oct 2021 – Apr 2022

Remote

  • • Delivered features for internal admin tools using React + GraphQL; collaborated on schema design and UI contracts.

  • • Consumed Hack (PHP variant) microservices; maintained strict typing and internal CI/testing standards.

  • • Documented reusable patterns for React hooks/state and shared them with adjacent teams.

React
GraphQL
Hack
PHP

Software Engineer

Wells Fargo
Contract

Apr 2021 – Oct 2021

Remote

  • • Maintained UI for a Java-backed billing platform with JSP, jQuery, Bootstrap focusing on cross-browser performance.

  • • Automated key workflows with Selenium; collaborated on accessibility checks with internal tooling.

  • • Supported sprint planning, QA handoffs, and production hotfixes.

Java
JSP
jQuery
Bootstrap
Selenium

Software Engineer II

Intuit
Contract

Apr 2020 – Apr 2021

Remote

  • • Built React + TypeScript and GraphQL features for QuickBooks web UI.

  • • Partnered with backend teams on schema design and endpoint contracts (validated via GraphiQL/Postman).

  • • Added Jest tests to critical modules and integrated with Jenkins for CI enforcement.

  • • Reviewed designs to ensure accessibility and faithful implementation.

React
TypeScript
GraphQL
Jest
Jenkins
GraphiQL
Postman

Senior Software Engineer

Walmart Labs

Sep 2019 – Apr 2020

Sunnyvale, CA

  • • Delivered React/Redux modules for account management, integrating with Java/Spring REST services.

  • • Implemented consistent UI with Material UI, responsive breakpoints, and linting/formatting standards.

  • • Wrote Jest/Enzyme tests and worked with DevOps to include them in CI.

React
Redux
Java
Spring
Material UI
Jest
Enzyme

Senior Software Engineer

Cisco

Jun 2019 – Sep 2019

San Jose, CA

  • • Shipped React frontends for internal collaboration tools; wrote Jest/Enzyme unit tests.

  • • Built Node.js microservices that persisted analytics to MongoDB and surfaced data via Elasticsearch.

  • • Automated builds in Jenkins, produced Docker images, and coordinated deployments to AWS EC2.

React
Node.js
MongoDB
Elasticsearch
Jest
Enzyme
Jenkins
Docker
AWS EC2

Lead Software Engineer, Co-founder

Guardian Alliance Technologies

Sep 2017 – Apr 2019

Stockton, CA

  • • Co-architected a CJIS-aware SaaS using PHP (CodeIgniter) and Node.js with multi-tenant MySQL/PostgreSQL.

  • • Managed AWS GovCloud resources (EC2, RDS, S3) with least-privilege IAM; maintained audit logging.

  • • Implemented OWASP-aligned practices and prepared for FedRAMP-style reviews.

  • • Built Jenkins pipelines to run PHP/Node tests and ship containerized services (ECS where applicable).

  • • Led standups, reviews, and mentoring for a team of five.

PHP
CodeIgniter
Node.js
MySQL
PostgreSQL
AWS GovCloud
EC2
RDS
S3
Jenkins
ECS

Lead Software Engineer

MindSlap

Aug 2016 – Sep 2017

Stockton, CA

  • • Delivered client projects: React frontends, PHP (CodeIgniter) services, and WordPress-driven microsites.

  • • Created reusable components and integrated legacy jQuery plugins only where needed.

  • • Established Jest and PHPUnit suites and surfaced results in Jenkins.

React
PHP
CodeIgniter
WordPress
jQuery
Jest
PHPUnit
Jenkins

Senior Software Engineer

Zetta Inc.

Apr 2012 – Jul 2016

Sunnyvale, CA

  • • Modernized legacy UI by moving from PHP templates to React and Backbone.

  • • Exposed data via PHP (Zend) REST APIs backed by MySQL/PostgreSQL.

  • • Authored Jenkins pipelines to build/test JS bundles and deploy to AWS S3/CloudFront.

  • • Introduced TDD practices and mentored junior developers.

React
Backbone
PHP
Zend
MySQL
PostgreSQL
Jenkins
AWS S3
CloudFront

Education

Self-taught / Continuous Learning

Various Online Platforms & Industry Experience

Continuous professional development through hands-on experience, online courses, certifications, and staying current with emerging technologies.

Remote

Certifications & Awareness Training

CJIS Awareness (FBI CJIS Division)
FedRAMP Awareness (GSA)
HIPAA/PHI Awareness (HHS)
OWASP Security Practices (OWASP Foundation)