Senior QA Engineer

Polymarket

$120K — $150K *
Consumer Technology
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • 5+ years of mobile QA experience in a dynamic product environment.
  • Proficient in testing on both iOS and Android with awareness of platform nuances.
  • Ability to maintain quality in rapid release cycles without cutting corners.
  • Excellent communicator capable of delivering direct quality assessments to technical teams.
  • Curiosity about product mechanics beyond surface functionality.
  • Familiarity with AI testing tools like Claude or Codex to improve workflows.
  • Experience in automating tests in mobile environments is a plus.
  • Background in fintech or related fields is advantageous.

Responsibilities

  • Manually test mobile features end-to-end prior to release, identifying user-impacting issues.
  • Sign off on product releases and provide clear, concise quality status updates to stakeholders.
  • Enhance AI testing harness to minimize repetitive manual work and focus on complex problem-solving.
  • Expand automated test coverage in trading and market resolution processes, systematically identifying and closing gaps.
  • Investigate product behavior thoughtfully to flag any inconsistencies or concerns, regardless of technical compliance.
  • Adapt to changing priorities with a problem-solving mindset during unexpected shifts in focus.
  • Collaborate closely with mobile engineers to catch bugs early in the development process.

Benefits

  • Competitive salary & equity package.
  • Unlimited PTO for work-life balance.
  • Comprehensive health, vision, and dental insurance.
  • 401k plan with matching contributions.
  • State-of-the-art hardware setup including a new MacBook Pro and accessories.
Full Job Description
About the Role

Our Mobile Platform Team ships fast. We're iterating constantly on a product that millions of people use to make real-money predictions on real-world events, and quality is not optional. This role exists because we need someone who can hold the line on quality without slowing us down, someone who sees every release as a responsibility, not a formality.

You'll split your time roughly in half. Half is hands-on manual testing of new mobile features before each release cutoff. The other half is making that manual work increasingly unnecessary by improving our AI testing harness and extending automated coverage across our core flows. This isn't a role where you're just running scripts someone else wrote or checking boxes on a test plan. You'll have real ownership over how quality gets defined and verified on this team.

The right person for this role has worked at a product company where the app was always evolving and where "we'll fix it later" wasn't an option. You've seen what it looks like when quality slips at scale, and you don't want to be the reason it happens here.

What You'll Do
  • Manually test new mobile features end-to-end before each release cutoff, catching issues that matter to real users before they ship.
  • Sign off on releases and communicate quality status clearly to engineers, product managers, and leadership, no ambiguity, no hedging.
  • Improve our AI testing harness to reduce the volume of repetitive manual verification, using agentic tools to do the tedious work so you can focus on the hard calls.
  • Extend automated test coverage across core trading and market resolution flows, identifying gaps and closing them systematically.
  • Dig into product behavior with genuine curiosity, asking why things work the way they do and flagging when something feels off even if it technically passes.
  • Adapt quickly when priorities shift, treating a last-minute scope change as a problem to solve rather than a reason to escalate.
  • Work directly with mobile engineers to surface bugs early in the development cycle, not just at the end of it.
What We're Looking For
  • Proven mobile QA experience at a product-focused company, not short-term projects or outsourced QA work, somewhere you saw a product evolve through many iterations.
  • Comfortable testing on both iOS and Android, with a strong eye for platform-specific behavior and edge cases.
  • Able to move fast without cutting corners, you've worked in environments where release cycles are short and you've figured out how to maintain quality anyway.
  • Strong communicator who can give a clear, honest quality assessment to a room of engineers and PMs without over-qualifying everything.
  • Genuinely curious about how products work under the hood, not just whether buttons tap correctly but why flows are built the way they are.
  • Experience with agentic engineering tools like Claude or Codex to assist in testing workflows, not to replace judgment, but to scale it.
  • (Plus) Experience writing or extending automated tests, whether in a mobile-native framework or otherwise.
  • (Plus) Background in fintech, crypto, or trading products where accuracy and real-money outcomes raise the stakes on every bug.


Benefits
  • Competitive salary & equity
  • Unlimited PTO
  • Full Health, Vision, & Dental coverage
  • 401k match
  • Hardware setup: new MacBook Pro, big display, & accessories

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