SDET (Wallet Platform)

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

The Role

This is a 6-month contractor position for an SDET who thinks like an engineer and tests like one too. You will design and own test infrastructure for financial-grade systems including payment flows, KYC pipelines, card transaction handling, and compliance rails. This is an engineering role with quality as its primary output, embedded in a team that ships production financial software at startup velocity. Your job is to make speed and correctness coexist.

What You'll Own

Core Ownership

• 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

Automation & Infrastructure

• 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

Quality Process

• Define and document QA standards within the squad
• Review PRs for testability and test coverage gaps
• Flag flaky tests and own resolution

Collaboration

• Partner with product engineers to shift testing left
• Work with PM/design to clarify acceptance criteria before development begins
• Surface quality risks and blockers early in the sprint

Core 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 including REST, webhooks, idempotency, and retry behavior
• Working knowledge of databases (SQL) and ability to write test data seeding/cleanup logic

Financial Systems Experience

• Experience testing payment flows, ledger systems, or compliance pipelines (strong preference, will train for the right engineer)
• Understanding of idempotency, double-spend prevention, and eventual consistency in distributed systems
• Familiarity with webhook-based event systems and out-of-order delivery scenarios

CI/CD and Infrastructure

• 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