SDET

About Phantom

Phantom combines industry-leading security with thoughtfully designed tools to make powerful financial tools approachable and easy to use. The company has grown to a community of 20M+ people, ranking #1 in the Google Play Store finance category and consistently ranking as a Top 50 app across all categories.

The Role

This is a 6-month contractor SDET position focused on designing and owning test infrastructure for financial-grade systems including payment flows, KYC pipelines, card transaction handling, and compliance rails. This is an engineering role that owns quality as its primary output, working embedded in a team shipping production financial software at startup velocity.

Core Responsibilities

• Own test coverage for squad features end-to-end (unit, integration, E2E)
• Build and maintain automated test suites for new and existing functionality
• Run manual and exploratory testing on features before release
• Write reliable, maintainable automated tests (UI, API, regression)
• Contribute to the shared test automation framework
• Integrate tests into CI/CD pipelines and ensure they run reliably on every PR/deploy
• Define and document QA standards within the squad
• Review PRs for testability and test coverage gaps
• Flag flaky tests and own resolution
• Partner with product engineers to shift testing left
• Work with PM/design to clarify acceptance criteria before development
• Surface quality risks and blockers early in the sprint

Required Qualifications

• Strong proficiency in at least one of: Python, TypeScript/JavaScript, Go
• Experience designing and building test frameworks from scratch
• Deep familiarity with API testing (REST, webhooks, idempotency, retry behavior)
• Working knowledge of databases (SQL) and ability to write test data seeding/cleanup logic
• Experience integrating test suites into CI pipelines (GitHub Actions, GitLab CI, or similar)
• Ability to instrument tests for flakiness detection, coverage tracking, and runtime performance
• Comfort operating in a cloud environment

Preferred Qualifications

• Experience testing payment flows, ledger systems, or compliance pipelines
• Understanding of idempotency, double-spend prevention, and eventual consistency in distributed systems
• Familiarity with webhook-based event systems and out-of-order delivery scenarios