Senior Test Automation Engineer / SDET

You build the test infrastructure for a crypto payment platform, including vendor mocks, simulators, contract tests, test data tooling, CI pipelines, reliable test suites, and production-adjacent checks. You create reusable testing frameworks, eliminate flaky tests, coach engineers on effective testing, and support testing across custody, AML, screening, and stablecoin settlement systems.

Responsibilities

• Design and build stateful mocks and simulators for third-party vendor APIs
• Implement contract tests against real vendor sandboxes
• Build test data and environment tooling
• Own the CI test pipeline and optimize feedback, integration suites, parallelization, and test execution
• Eliminate flaky tests through quarantine, statistics, and root-cause analysis
• Create test-writing scaffolding, helper libraries, fixtures, and object builders
• Document test patterns for AI-assisted test generation
• Coach engineers on writing effective tests through reviews and pairing
• Build post-deploy smoke tests and synthetic transactions
• Automate verification before traffic switches to a service

Requirements

• 5+ years as a software engineer with substantial test-infrastructure ownership
• Strong TypeScript skills
• Experience building test frameworks and harnesses from scratch
• Hands-on experience with Playwright or a modern automation framework
• Experience designing CI/CD test stages with parallelization and selective test execution
• API testing and mocking or stubbing of third-party services
• Daily use of AI coding tools and ability to review AI-generated code critically
• Ability to build a working understanding of crypto and stablecoin payment flows on the job
• High agency and independent prioritization
• Written and verbal communication in English
• Understanding of idempotency, reconciliation, and state machines
• Experience with contract testing tooling such as Pact
• Performance and load testing experience
• Experience in a regulated environment
• Experience with TestRail or similar test management tooling

Benefits

• Flexibility to determine how and when work is delivered
• Company-issued laptop
• Technology accessories
• Annual in-person full-team meetup