QA Lead

About the opportunity

Lead the test strategy for a real-money platform, proving settlement math cannot leak, double-pay, or drift while building a traceable test-case library from scratch.

About our client Our client is preparing two AI-driven platforms for enterprise readiness, with a focus on security, correctness, and financial integrity ahead of a production launch.

What you'll do

• Own the test strategy for the settlement engine: design coverage that proves settlement math is correct and cannot leak, double-pay, or drift.

• Test the closed-loop money-movement path end to end and verify it is fully auditable.

• Drive security testing at the RPC / SECURITY DEFINER layer, where the real business logic lives.

• Verify access controls — 21+ age gating and identity verification — gate before any funds move (subject to Persona credential availability).

• Author a traceable test-case library from scratch and stand up the shared defect tracker (Linear or Jira).

• Report defects with precise repro steps; the client remediates and you re-test (you find, they fix, you verify).

• Coordinate sandbox testing across OpenNode (settlement, test mode) and Resend (email).

• Lead the CALL-IT pod.

What you bring (must-haves)

• Senior QA / test-engineering experience on systems handling money, transactions, ledgers, or settlement — required, not adjacent.

• Strong SQL / Postgres, ideally including stored-procedure or SECURITY DEFINER function testing.

• Experience testing payment, settlement, ledger, or wallet flows, with an instinct for where money leaks or double-counts.

• Working knowledge of Next.js / API-driven web apps and how to test an RPC layer.

• Ability to design coverage where none exists and lead a small pod.

• Rigorous, reproducible defect reporting in clear written English.

Bonus points for (nice-to-haves)

• Fintech, payments, iGaming, testing background.

• Familiarity with Supabase and Vercel.

• Exposure to KYC / identity-verification flows (e.g., Persona) and age-gating.

• Understanding of Bitcoin / Lightning settlement (e.g., OpenNode).

Perks & benefits 💻 Equipment provided — none of that "bring your own device" stuff here
🛡️ Full back-office support — Legal, Accounting, HR Business Partner, and Delivery team
🧭 Career and cultural mentoring — how to show up, stand out, and navigate US work culture
🗣️ Free English lessons with a native speaker
🤝 Referral bonus — recommend Ubi to your tech friends and get paid for it
🏖️ Florianópolis HQ always open — 100% remote, but the office is there whenever you want it.

How the process works

Why Ubiminds? With 9 years in the market and GPTW-certified, Ubiminds connects Latin American tech professionals with software companies in the US and Canada. Hundreds of professionals in data, design, product, and engineering are already growing in North American teams with our support. We're with you throughout the entire journey — Recruitment, Legal, Accounting, PeopleOps, and career guidance — so you can thrive internationally with confidence. Ready to go global? Apply now — it takes less than 5 minutes.