Ostium Labs - QA Engineer
Requirements
• Solid experience testing web and mobile applications. • Familiar with DeFi primitives like wallets, approvals, order types, on-chain vs off-chain flows, network switching, transaction states. • You should be able to look at a trading interface and intuitively know what edge cases to hunt for. • Experience with automation testing on web apps (Cypress, Playwright, or similar), writing and maintaining test suites, not just manual passes. • Comfortable reading logs, using browser dev tools, and filing bugs that engineers can actually act on. • Experience testing across multiple chains or L2s. • Familiarity with mobile testing frameworks (Detox, Appium). • Basic scripting ability (JS/TS or Python). • Experience with CI-integrated test pipelines.
Responsibilities
• Own quality across web and mobile frontends • Think like a real user with money on the line — hunt for edge cases, broken flows, and UX friction • Write and maintain automated test suites for the web app (Cypress, Playwright, or similar) • Test DeFi-specific flows — wallet connections, approvals, order types, transaction states, network switching • File detailed, actionable bug reports with reproduction steps engineers can immediately act on • Use browser dev tools and logs to investigate issues beyond surface-level symptoms • Work with engineering to verify fixes, catch regressions, and validate releases before they ship • Help build and improve CI-integrated test pipelines over time
Benefits
• Opportunity to work with cutting-edge blockchain technology • Collaborative environment with highly skilled team members • Flexible work arrangements • Professional development opportunities • You're the person who finds the bug everyone else missed because you actually used the product like a real user would. You take ownership of quality and not just flagging issues but following them through to resolution. You're curious about how things work under the hood, even if you're not writing the code. High agency while obsessed with getting the details right. • If this sounds like you, reach out. • NYC Pay Transparency Disclosure: • Salary Range: $100,000 to $250,000 annually plus benefits. • This salary range is based on the current available market data, and represents the expected salary range for this role. Ostium has minimal hierarchy and few titles, but has broad ranges of experience represented within roles. Should you have compensation expectations that exceed these bands, we'd love to hear from you and would welcome you to reach out to further discuss. • Commitment to Equal Opportunity
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