Senior Software Development Engineer in Test (SDET)

Innovate with purpose

At BILL, we believe in empowering the businesses that drive our economy. By replacing outdated financial processes with innovative tools, we help businesses—from startups to established brands—make smarter decisions and gain control of their operations. And we don’t stop there: we’re creating the future of financial automation so businesses can spend more time on what matters.

Working here means you become part of a vision-driven team that’s ready to tackle challenges and build cutting-edge solutions. We value purpose, drive, and curiosity—and we thrive in a fast-paced, ever-changing environment. We're remote-first, with office spaces in San Jose, CA and Draper, UT — and opportunities to connect in person when it counts. BILLders collaborate to deliver real impact for businesses that need more time in their busy weeks.

BILL builds high performing teams and we seek to hire the best talent for every role. We're committed to building a workplace that fosters inclusion and diverse perspectives, valuing each person’s unique skills and experiences. We’d love to hear from you—you might be just what we’re looking for, whether in this role or another.

✨ Let’s give businesses more time for what matters.

Make your impact at a leading Fintech Company

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.

• 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.

• 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