Austin, Texas · Open to senior SDET & QE leadership roles

Oscar Juarez

Senior SDET & Software Quality Engineer

I build test automation frameworks, CI/CD quality gates, and backend validation systems. For 20+ years I've helped engineering teams ship software they can trust.

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ci / regression-suite 
$ make test-parallel --shards=12
▸ provisioning containers…        done
▸ api contract tests     ✓ 412 passed
▸ e2e · web + mobile      ✓ 1,186 passed
▸ load / stress (go)      ✓ p95 182ms
▸ flaky quarantine        0 retried

quality gate  PASSED  in 6m 41s
$

Background & philosophy

20+ years making quality a speed advantage

Quality engineering is more than catching bugs. It means building test infrastructure that scales, moving validation earlier in the cycle, and giving developers the confidence to ship fast.

Test architecture

Clean, reusable, multi-layer automation suites designed from scratch for web, mobile, and backend microservices.

CI/CD & DevOps

Automated validation built into delivery pipelines, so releases ship fast with flaky tests kept out of the gate.

API & backend

Protocol-level testing, REST contract validation, data integrity checks, and microservice integration coverage.

Performance & IoT

Throughput under heavy load, embedded-system telemetry, and the seams where hardware meets software.

Off the clock I'm building hardware, a home theater, and a BBQ smoker. See ojuarez.me.

Toolkit

Technical skills

Built up over two decades of shipping and testing production software.

</> Languages

  • Python
  • Go
  • JavaScript / TypeScript
  • SQL
  • Bash

◇ Automation & tools

  • Selenium
  • Cypress
  • Robot Framework
  • Nightwatch.js
  • PyTest
  • Postman / Newman

☁ Cloud & infrastructure

  • AWS
  • GCP
  • Docker
  • GitHub Actions
  • Jenkins
  • Vercel
  • Linux

Experience

Core expertise

Highlights from continuous quality, test automation, and engineering work.

  1. Senior Software Development Engineer in Test

    Senior

    Enterprise test infrastructure & automation architecture

    • Designed end-to-end, multi-tier automation frameworks using Python, Cypress, and Robot Framework.
    • Cut regression cycle time by 65% with parallel test-runner orchestration in Dockerized CI/CD pipelines.
    • Led REST API contract validation and automated load/stress testing with custom Go and Postman suites.

  2. Lead QA Engineer & Backend Testing Specialist

    Lead

    Distributed systems & API quality engineering

    • Ran quality strategy across web apps, cloud APIs, and microservice databases.
    • Built Nightwatch.js and Selenium suites for critical user journeys, with a zero-flakiness bar.
    • Mentored cross-functional teams on TDD/BDD practices and test-first development.

  3. Embedded Systems & Hardware QA Engineer

    Embedded

    IoT, telemetry & firmware testing

    • Validated hardware/software protocols, sensor arrays, and IoT telemetry streams.
    • Built automated test rigs and mock servers to check firmware against edge conditions.

Selected work

Featured projects

Test tooling, IoT experiments, and side projects.

Test tooling

Distributed Test Runner CLI

A lightweight Go CLI that shards end-to-end web suites across containers and merges results into one report.

  • Go
  • Docker
  • CI
IoT

ESP32 Telemetry Monitor

A real-time environmental metrics collector on microcontrollers, with automated MQTT integration and live dashboards.

  • ESP32
  • Python
  • MQTT
API automation

API Contract & Mock Suite

A REST mock generator and schema validator that let frontend teams build against simulated backend services.

  • Postman
  • TypeScript
  • JSON Schema

Contact

Let's build something reliable

Hiring for a senior SDET or QE lead, or need help with a test strategy? Send a note and I'll reply within a couple of days.