Frontend AI Developer

FIDEL GUAJARDO

React Frontend Developer & UI

210-***-**** *******@*****.*** San Antonio, TX

PROFESSIONAL SUMMARY

Adaptable professional with 20+ years of experience and a proven knowledge of IT strategy, advanced technology, and web platform development, including extensive UI/UX experience. Aiming to leverage my skills to successfully fill the Front End or Full Stack Developer role at your company.

Skills

AI Skills: LangChain, OpenAI, ChatOpenAI, HuggingFace, Assistant API, Embeddings, Vectors, PineCone, Supabase, RunnableSequence, ChatCompletions, TensorFlow, Agents

Frontend Skills: Tanstack-Query, React-Hook-Form, Yup, Angular, NextJS, ReactJS, VueJS, Polymer, StencilJS, KnockoutJS, Typescript, Javascript, ES6, NgRx, Redux, Sagas, ARIA WCAG accessibility, D3, RxJS, VictoryCharts, HighCharts, ChartJS, React-Vis, Jest, Webpack

CSS Frameworks: Flexbox, CSS, SASS, LESS, CSS Grid, Material UI, Bootstrap, Foundation, Kendo UI, StyleComponents, Glamorous, CSS-in-JS, Responsive Design

CMS: Gatsby, Contentful, AEM

Source Controls: Github, BitBucket, GitLab, AWS CodeCommit

Integrations: Sharepoint, Stripe, Firebase, GraphQL, TensorFlow.js, Oath2, S3, No-SQL, Recurly, RESTful, Cloverleaf POS

Backend: NodeJS, PHP, Wordpress, AWS, GCP, Azure, DynamoDB, MongoDB, Firestore, MySQL, Postgress,

Programming Languages: ES6, Python, Elixir, Javascript, Typescript, VBScript, Perl, PHP

Portfolio: https://wonderful-knuth-abfe3a.netlify.com/

Personal Projects

I frequently help friends to continue developing tech ideas and have used these technologies:

GCP Cloud Functions with Firebase/Firestore

Cloudinary for Image Processing

AWS Amplify with Cognito, AppSync, Lambda Functions, Rekognition

Authentication with Passport-Oath2

Stripe for Payments Processing

SendGrid for Email Sending & Processing

Elixir with Phoenix Liveview

CloverLeaf POS on Wordpress

EXPERIENCE

Frontend Architect Lead, FedEx (via InfoGain), September 2023 - April 2025

Plano, TX

Used ChatOpenAI, ChatCompletions, PineCone Vectors and LangChain to process natural language searches for facilities, shipments, and labels, e.g. "What % of deliveries were late last week in Texas?"

Translated Figma designs to working UI/UX code

Wrote a browser-based background process for bulk generation of PDF/ZPL files, while the user continues using the website. Data pulled from a GraphQL endpoint using Apollo Client.

Reformatted all user prompts with Runnable Sequences and PassThroughs for proper interpretation by the ChatOpenAI API.

Worked within a React, NextJS, Micro-Frontend architecture and built reusable components used across remotes.

Wrote Tanstack-Query queries & mutations for sequential or parallel async processes with caching requirements to complement Angular's shareReplay and BehaviorSubject

Frontend AI Engineer, AutoZone (via Primus Global), April 2023 - September 2023

Nashville, TN

Built a fuzzy searchable database of parts for sales associates to pinpoint a customer's needs, e.g. "I hear a rattling noise when I accelerate, but only in cold weather. What could be causing this, and what parts might I need to fix it?"

Converted PDF docs into chunks, embeddings, and vectors to store in a Supabase database

Used LangChain.js to process a user's prompt and match it to the database

Learned and used AutoZone's Starc design system to build the UI/UX.

Used Vite and Next.js 14, implementing React Query for optimized data caching and state management

Built a browser-based upload of PDFs and ZIP files

Created a unified error handling system that standardized various backend error responses into consistent user feedback

Web Developer, Nike (via InfoSys), May 2022 - April 2023

Richardson, TX

Supported an internal NextJS (React) app for managing survey responses for factory compliance requirements

Uploaded & processed pencil-filled surveys with TensorFlowJS

Used TensorFlowJS for OCR digitizing and classification of survey responses

Used Redux for app state management

Forwarded processed results to AWS DynamoDB via a Lambda endpoint

Troubleshooted failing tests for AWS Lambda functions in NodeJS

Updated Jenkins Pipelines for running tests contained in a separate repo

Web Developer, United Health Group (via GridDynamics), March 2021 - April 2022

San Ramon, CA

Improved a NextJS 10 app for drug prescription discounts

Maintained and modified Polymer components used by either Angular or React applications

Converted "http" Angular services to use data streams and actions streams via RxJS observables and effects for use in a React app

Wrote unit tests for React or Polymer components with Jest and React Testing-Library

Implemented WCAG Aria tags across all forms

Used NextJS 11, React 17, Redux, React Hooks, Angular 12, NgRx, RxJS, GraphQL, Polymer 3, Styled-Components, Typescript

Web Developer, OnlineMedEd, May 2020 - January 2021

Austin, TX

Converted PHP/Laravel/Blade to PHP/React/Redux-Saga

Converted React Class Components to Functional Components with Hooks: useCallback, useMemo, useState, useEffect

Adhered to WCAG Aria accessibility standards across the entire codebase

Worked on Ecommerce shopping cart with Recurly

Used Redux tooling such as Redux-Saga, Redux-Actions, Redux-Form

Web React Developer, San Antonio Water Systems, November 2019 - March 2020

San Antonio, TX

Built a dashboard for commercial account holders who own hundreds of properties. Example: https://elastic-curie-6e79c7.netlify.app/

Used React, Redux, & Redux Sagas to manage individual API requests

Built a new CMS with Gatsby

Built a real-time POC with websockets

Explored XState for state management as an alternative for global state management

Built a GraphQL Endpoint POC as a Azure Cloud Function and consumed on frontend with Apollo-React

Use Kendo, React MUI & SCSS for the UI

Web Vue Developer, Harland Clarke, November 2018 - October 2019

San Antonio, TX

Architected new retail E-commerce channel with Vue, Vuex & Typescript

Developed their ecommerce shopping cart and integration with POS

Connected to AWS DocumentDB (MongoDB) for persistence

Spun up AWS EC2 Instances for hosting

Wrote test scripts with Vue-Test-Utils

Used Node to build endpoints for file conversions from text or Word to PDF

Exported components with the Vue CLI and to publish to private NPM and Git Package registries

Ecommerce Integrator, Constantino's Pizza, June 2018 - July 2019

Somerset, TX

This was a temporary, evening and weekend job helping a friend with his business.

Helped a friend integrate his Cloverleaf POS with his online ecommerce store

Unified the cashier's POS and the online experience to create one centralized way of receiving orders

Integration was done within a Wordpress site

Performed tests with fake transactions before going live

Monitored all activity and ran monthly reports

Web Software Integrator, USAA, October 2017 - November 2018

San Antonio, TX

Developed Dashboards of Charts & Calendars for visualization of Process Engineering flows with data from Sharepoint Lists

Used various charting libraries to achieve desired results including D3, VictoryCharts, HighCharts, etc.

Built a recursive tree of data with Vue. Example: https://7j40z5l400.csb.app/#/

Used Web-workers to offload processing of unstructured Sharepoint data

Used Flexbox, React, Vue, & Vuetify as needed

Used Node to process data and export as Excel Spreadsheets

Web React Architect, Airstrip.com, June 2017 - September 2017

San Antonio, TX

Built visualizations of EKG charts that pan/zoom +200k data points at once

Used D3, PixiJS, & WebGL as needed, and many other SVG chart libraries

Used React, MobX, Scss, and Kendo for UI

Software Developer Level 4, Rackspace, October 2014 - June 2017

San Antonio, TX

Built Angular-based components and tested with Jasmine/Jest on Selenium

Integrated jQuery with Angular directives for added functionality

Wrote Gulp scripts for automating builds of front-end code

Used Groovy, Grails and Oracle on backend

Examples: https://plnkr.co/users/fidoogle/plunks

Web App Developer, Frost Bank, November 2000 - September 2014

San Antonio, TX

Used Java, Struts, Broadvision, jQuery, Knockout, Angular, Oracle

Replace 10k lines of HTML/CSS/jQuery with 300 lines of KnockoutJS and image sprites for a fancy top navigation bar

Wrote Enterprise Java Beans for Servlets on Struts framework

Wrote Java Server Pages on Struts and Java Server Faces on Spring Framework

Developed proof of concepts with Angular, AWS, Bootstrap

Provisioned AWS EC2 Instances and S3 Buckets for hosting POCs.

EDUCATION

BS in Physics

University of Texas at Austin, Austin, TX, May 1993

Completed coursework towards BS in Software Engineering

Stanford University, Stanford, CA, Jun 1989

Relevant Coursework

2 years of Software Engineering

2 years of Mechanical Engineering

4 years of Mathematics

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