Senior QA Engineer

JuiceX; Florida; Presencial; USD 90.000 - 150.000; Jornada completa

Descripción de la vacante

JuiceX, a Florida-based prediction markets exchange, seeks a Senior QA Engineer to own quality across the full delivery lifecycle. You will work with Rust-backed services, React/TypeScript front ends, and a Kubernetes-based cloud platform, ensuring correctness for trading, payments, and regulatory compliance.

You will design risk-based tests, build automated suites, and collaborate across teams to prevent defects and enable reliable production releases.

Formación

• Experience delivering quality across full delivery lifecycle, including production sign off.
• Strong test design and risk analysis skills with practical automation.
• Hands-on automation with Playwright and API testing; CI/CD integration.
• Ability to read/write code in at least one backend language (Rust a plus).
• SQL for data validation and experience with regulated environments is a plus.
• Regular use of AI coding/testing tools and clear written communication.

Responsabilidades

• Turn business requirements into testable acceptance criteria before development.
• Define risk-based test strategies for initiatives across all test levels.
• Design, build, and maintain automated test suites integrated into CI/CD.
• Review changes for test quality and diagnose flaky tests.
• Own go/no-go decisions for production releases with evidence.
• Leverage AI to create test scenarios and automate maintenance tasks.
• Perform agent-driven exploratory and UI testing; evaluate AI features.

Conocimientos

QA Engineering

Test design

Automation (Playwright/TS)

API testing

SQL

CI/CD

AI tooling

Rust

Herramientas

Playwright

TypeScript

CI/CD tooling

Rust

Descripción del empleo

About JuiceX

JuiceX is a rapidly growing prediction markets exchange. Our company is building the infrastructure to offer a fully compliant, transparent, and innovative marketplace for event driven contracts under U.S. regulatory frameworks.

About JuiceX

JuiceX is a rapidly growing prediction markets exchange. Our company is building the infrastructure to offer a fully compliant, transparent, and innovative marketplace for event driven contracts under U.S. regulatory frameworks.

The Opportunity

We are hiring a Senior QA Engineer to own quality across the full delivery lifecycle, from business requirement through production sign off. At a regulated exchange where trading, clearing, and the payments that fund them all have to be correct, quality protects our customers' money and our regulatory standing. You will work across distributed backend services in Rust, web and mobile front ends in React and TypeScript, a cloud native platform on Kubernetes, and integrations with payment, identity, and market infrastructure partners.

Professional Experience

• Owning quality across the full delivery lifecycle, from requirements through production sign off
• Risk based test strategy and test design across unit, integration, end to end, performance, and exploratory testing
• Hands on test automation and the frameworks behind it, integrated into CI/CD
• Testing distributed backend services and modern web and mobile front ends
• Reading and writing code and validating data directly, not testing only through the UI
• Using AI coding and testing tools to accelerate work without lowering the quality bar

Qualifications

• 5+ years in QA or quality engineering, including owning release sign off for production systems
• Strong test design and risk analysis skills
• Hands on test automation, ideally Playwright with TypeScript, plus API testing
• Comfortable reading and writing code in at least one backend language (Rust is a plus)
• Working SQL for data validation
• Real, regular use of AI coding and testing tools, with examples you can share
• CI/CD experience
• Clear written communication
• Preferred: financial services experience, including trading, payments, or fintech
• Preferred: experience in regulated environments
• Preferred: performance and load testing
• Preferred: experience building AI agents, tooling, or LLM evaluations
• Preferred: mobile testing

Position Responsibilities

• Turn business requirements into clear, testable acceptance criteria before development starts
• Define a risk based test strategy for each initiative, balancing unit, integration, end to end, performance, and exploratory testing
• Design, build, and maintain automated test suites and frameworks, and integrate them into CI/CD
• Review changes for test quality and coverage, and drive flaky or failing tests to root cause
• Own the go or no go decision for production releases, with clear, auditable evidence of what was tested
• Track escaped defects, feed the lessons back into requirements and tests, and raise the quality bar across the team
• Use AI to turn requirements into test scenarios, edge cases, and automation
• Run agent driven exploratory and UI testing
• Build AI assisted tooling for test maintenance and failure triage, and reusable QA workflows the team can apply
• Test and evaluate AI powered product features, verifying AI output against real system behavior before sign off