Senior Software Development Engineer in Test (SDET)

BILL

6d•$129,600 - $183,000•Remote

About The Position

We are the team of Software Development Engineers in Test (SDET) - the voice of quality within Engineering squads and the guardians of Continuous Delivery and Innovation. Quality is not a phase we own at the end of the pipeline; it is a discipline we build into every stage of development. As a Senior SDET, you will understand the technical design of applications, champion testability from the earliest design conversations, and hold a high bar for the quality of the components we ship. You will build test automation that delivers maximum, meaningful coverage in the most efficient way possible — catching defects early, preventing regressions, and giving the team the confidence to release continuously without compromising on quality.

Requirements

Bachelors degree in Computer Science, Engineering, Mathematics, or equivalent work experience.
5+ years of professional experience on a software development team (cross-functional environment preferred).
Experience designing, implementing, and running automated tests with Playwright (or a similar modern browser automation framework, with a willingness to work primarily in Playwright).
Proficiency in JavaScript/TypeScript preferred; proficiency in any functional or general-purpose language considered.
Hands-on experience with AI-assisted testing – using AI tools to generate tests, triage failures, maintain self-healing locators, or analyze coverage gaps – and a mindset of folding these into everyday workflows.
API testing knowledge – REST/GraphQL, request/response validation, auth flows, and API-level automation.
An innate ability to pick up and ramp on new technologies and languages quickly.
Experience determining the cause of automated test failures.
Experience documenting and completing manual tests.
Experience writing release criteria and associated test plans.
Knowledge of CI/CD pipelines and quality gates.

Nice To Haves

Payments industry experience or exposure to card issuing (virtual/physical cards, payment rails, settlement, reconciliation, or related domains).
Experience with contract testing (Pact or similar) and visual regression testing (Chromatic, Percy, or similar).
Experience introducing coverage gating and enforcing quality thresholds in the delivery pipeline.
Familiarity with observability tooling (Datadog, Splunk) for test and production quality signals.
Experience building or maintaining shared test frameworks/libraries used by other engineers.
Exposure to evaluating non-deterministic / AI-powered features (eval frameworks, prompt/output validation)

Responsibilities

Spend ~80% of your time on automation and enabling the team to drive quality through strong testing practices, taking an automation-first, AI-assisted approach to test design and authoring.
Collaborate with Engineers, Product, and Design to solidify and validate feature requirements - clear acceptance criteria, specifications, and expected outcomes - early in the lifecycle.
Partner with Engineering to create and evangelize quality practices, coaching developers to own more of their own test authorship over time.
Write automated tests in TypeScript/Playwright across UI and API layers (functional, contract, and integration).
Contribute to testing framework design and implementation, optimize the testing process, and enable quality gating within the CI/CD pipeline for the squad's deliverables.
Leverage AI tools (test generation, self-healing locators, coverage-gap analysis, failure triage) to increase coverage and reduce maintenance overhead.
Regularly write and complete manual and exploratory tests alongside automation to verify new features, cover edge cases, and catch regressions.
Investigate and root-cause automated test failures, distinguishing product defects from flaky tests and infrastructure issues.
Define and maintain release criteria, test plans, and coverage expectations across multiple squads.