Saul Flores

Performance & Senior Software Engineer

Saul Flores

I lead web performance at Zillow and ship products people actually use.

Eleven years building web and mobile systems across SaaS, fintech, proptech, and consumer products. By day I drive Core Web Vitals and performance culture at Zillow. On my own time I founded HSafe, GameSet, and PocketFest — platforms already running for HOAs, padel clubs, and school events.

Tijuana, Mexico/English · Spanish

View productsExperienceGet in touch

Products

Software with real users.

Three products I founded and still run — HOA operations, padel tournaments, and cashless school events.

HSafe
In production · real users
Residential operations for HOAs — QR access, amenity bookings, packages, and Stripe fees.
Next.jsReact NativetRPCPostgreSQLStripe
Case studyhsafe.io
GameSet
In production · real users
Padel organizers drop the spreadsheet. Americano, Mexicano, and brackets with live scores.
Next.jsReact NativeExpoDrizzle ORMPostgreSQL
Case studygameset.io
PocketFest
In production · real users
School fairs go cashless. Bank, guest wallets, and vendor registers stay in sync all night.
Next.jsReact NativeNestJSPostgreSQLStripe
Case studypocketfest.app

Experience

Performance work at scale.

Zillow today. Before that, technical leadership and full-stack delivery across SaaS and enterprise products.

  1. Zillow

    2024 — Present

    Performance / Senior Software Engineer

    Lead web performance and user-experience work across large consumer surfaces.

    • Drive Core Web Vitals (LCP, CLS, INP) and App Vitals on high-traffic applications.
    • Built CI gates and automated tooling that catch performance regressions before they ship.
    • Use RUM, profiling, and distributed observability to find bottlenecks and set engineering standards.

  2. Able

    2022 — 2024

    Technical Lead

    Led engineering from discovery through production across multiple client products.

    • Owned architecture for NestJS and PostgreSQL services with a focus on availability and query performance.
    • Shipped cross-platform web and mobile experiences in Next.js and React Native.
    • Set review standards, CI/CD, and mentoring loops for junior and mid-level engineers.
    NestJSNext.jsReact NativePostgreSQL

  3. Shopventory / Thrivemetrics

    2020 — 2022

    Senior Software Engineer

    Built core features for a high-traffic enterprise inventory platform.

    • Worked across frontend and backend to keep releases stable in agile cycles.
    • Improved query efficiency and database scalability for high-volume transactions.
    ReactDjangoPostgreSQLKubernetesAngularJS

  4. Zipdev

    2018 — 2020

    Senior Software Engineer

    Delivered full-stack applications and APIs for U.S. enterprise clients.

    • Owned cloud provisioning and automated production deploys.
    • Shipped scalable web applications tailored to each client's stack.
    AngularJSDjangoPostgreSQL

  5. Pekub

    2016 — 2018

    Full Stack Engineer

    Built responsive web and mobile applications across client stacks.

    • Adapted to changing project needs without losing delivery pace.
    • Partnered with leadership to interview and vet incoming engineers.

About

Workshop

Computer Science, UABC. Eleven years in the stack. The rest is making things.

Languages

TypeScriptJavaScriptPythonSQLHTMLCSS

Frontend / Mobile

ReactNext.jsReact NativeExpoCore Web VitalsApp Vitals

Backend

Node.jsNestJSDjangotRPCDrizzle ORMPostgreSQLGraphQL

DevOps

AWSKubernetesDockerCI/CDGitHub Actions

Observability

Real-user monitoringDistributed tracingProfilingDatadogNew RelicSentry

Away from the keyboard I print in 3D. Same loop as shipping software: design, print, measure, adjust. Fixtures, housings, and small tools — physical drafts that teach tolerance, iteration, and craft.

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Contact

Get in touch.

For performance work, product architecture, or the next thing that needs to ship — write me.

Saul Flores — Software Engineer