Senior QA Engineer

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

Originally posted on Himalayas