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joesanchezjr/README.md

Software Engineer, Frontend 🌐

Curious and creative developer with over nine years of experience in building for the web β€” front-end proficiency, with full-stack capabilities. Dedicated to making the internet a more beautiful and accessible space through crafting performant and human-centered experiences with modern AI-assisted workflows. Seeking to join a team of good people building good things and build on the open web.

These are the tools that I use to build cool things

React.js TypeScript JavaScript HTML CSS3 Git Cloudflare Astro Remix React Router Next.js Node.js React Native Redux Jest Markdown TailwindCSS Bootstrap Prettier Github Figma React Context JSX Agile npm yarn webpack styled-components

Let's connect!

LinkedIn

Work Experience πŸ‘¨β€πŸ’»

✦ Cloudflare | Software Engineer

↳ (Jan 2025 - May 2026)

Built and shipped across the stack for Observatory - a unified web performance monitoring platform, combining Real User Monitoring (RUM), Core Web Vitals, and synthetic testing into a single, cohesive view. The work touched multiple layers in the stack, including the React/Typescript dashboard UI consuming GraphQL for analytics data and interfacing with a Node.js/Express backend backed by Postgres for test configuration and beacon management.

β†’ Engineered the Observatory overview - surfacing recent analytics and synthetic monitoring data with actionable recommendations to improve performance.

β†’ Expanded Observatory's synthetic testing capabilities by building the Network Tests scheduling and results UI, giving customers a new class of performance diagnostics alongside the existing Browser Tests experience.

β†’ Shipped RUM Lite onboarding as a first feature at Cloudflare β€” building the UI that enables lightweight RUM with built-in EU compliance scoping, broadening performance monitoring access.

β†’ Maintained and contributed to Telescope open source project for cross-browser web performance testing (see below).

β†’ Contributed to a component library modernization effort for dashboard pages, migrating from a legacy CSS-in-JS system to a Tailwind CSS + Base UI architecture β€” improving developer experience and long-term UI consistency for the end user.

Built with: React, TypeScript, GraphQL, Tailwind CSS, Base UI, Node.js, Express, Hono, PostgreSQL, Cloudflare Workers, Wrangler, Vite, GitLab

Read more: https://blog.cloudflare.com/introducing-observatory-and-smart-shield/

✦ Optum (UnitedHealthcare) | Senior Software Engineer

↳ (Sep 2021 - Aug 2023)

β†’ Developed and delivered key components and features for a high-traffic, user-facing platform across responsive web and mobile applications with millions of users - emphasized maintainable, well-tested, and accessible code through careful planning (specification, story writing, and sizing).

β†’ Led and fostered a collaborative team environment through active and close engagement with a variety of partners and cross-functional collaborators, including product managers and designers. Mentored associate engineers by imparting best practices and sharing business, product, and technical knowledge.

β†’ Actively participated in the on-call and release certification process through managing weekly releases and triaging production issues - ensuring timely updates and feature rollouts to end-users. Responsible for end-to-end testing, QA, and multi-environment deployments.

Built with: React, TypeScript, HTML, CSS, React Native, Webpack, Redux, styled-components, REST APIs, Jest, WDIO, Figma, Jenkins, Datadog, Splunk, Jira

✦ Preemptive Love | Front-End Developer

↳ (Jan 2019 - June 2021)

β†’ Engineered a mission-critical donation processing component responsible for processing over 50% of multi-million dollar revenue – built with React and third-party JS SDKs for a unified, secure, and streamlined payment processing experience for users.

β†’ Advocated for the integration of React into the organization’s tech stack, drove development of an internal UI library used in key components and projects across web frameworks, and managed a series of micro-sites tailored for special events and capital campaigns

β†’ Demonstrated initiative and a collaborative spirit – proactively addressed challenges and provided solutions within a grassroots organization - collaborated with back-end developers to architect and implement internal micro-services and APIs

Built with: React, JavaScript, HTML, CSS, CSS Modules, styled-components, React Context, third-party SDKs (Stripe, PayPal, and Braintree), Next.js, WordPress (PHP), Gatsby.js

✦ Life Teen | Photographer & Front-End Developer

↳ (Jan 2017 - Oct 2018)

β†’ Engineered and deployed marketing and event sites and pages, delivered multi-lingual blog content support, and created interactive components

β†’ Stepped up as an interim lead developer by guiding contractors and ensuring project continuity during a transition period for the organization

Built with: HTML, CSS, JavaScript, WordPress, React

Personal Projects & Experimentation πŸ§ͺ

β†’ Engineering full-stack applications with Node.js and React frameworks like Next.js and Remix. Interacting with data stored in Postgres/MySQL databases. Building with server-side components and server-side rendering (SSR), data streaming, serverless and edge environments, and all of the cool things that will ship less JavaScript to the client and improve the user experience.

β†’ Exploring best practices for user authentication and authorization for web applications. Developing my skills in services like Supabase Auth, Auth0, Clerk, and next-auth to help make the web more secure.

β†’ Working on both private greenfield and legacy projects across the stack with PHP and JavaScript.

Pinned Loading

  1. dev dev Public

    Source code for my developer portfolio

    TypeScript 3 1

  2. dash dash Public template

    Build something beautiful – with Dash

    TypeScript