Senior Software Development Engineer in Test (SDET)

Senior Software Development Engineer In Test (Sdte)Innovate with purposeAt 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 By replacing outdated financial processes with innovative tools, we help businesses—from startups to established brands—make smarter decisions and gain control of their operations.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 CompanyWe 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.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.We'd love to chat if you have: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.Desired Qualifications: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)Our ranges for each role and job level are based on a variety of factors including candidate experience, expertise, and geographic location and may vary from the amounts listed below. The role is also eligible for a competitive benefits package that includes: medical, dental, vision, life and disability insurance, 401(k) retirement plan, flexible spending & health savings account, paid holidays, paid time off, and other company benefits.Zone 1: San Francisco Bay Area CA (includes HQ), New York City, Seattle, Los Angeles County$152,500 - $183,000 USDZone 2: CA (Non San Francisco Bay Area and Los Angeles County), Austin TX, Massachusetts$137,300 - $164,700 USDZone 3: Utah (includes Utah office), Dallas TX, Houston TX, Florida, North Carolina, Illinois, Colorado, Arizona, Georgia, Oregon, Pennsylvania$129,600 - $155,600 USDWhat's in it for you?Redefining how businesses automate their work is a fast-paced, exciting, and fun environment. But we also have benefits and perks to ensure the magic isn't only experienced by our customers, but by our employees as well.Here is a preview of some of the amazing benefits here at BILL:100% paid employee health, dental, and vision plans (choose HMO, PPO, or HDHP)HSA & FSA accountsLife Insurance, Long & Short-term disability coverageEmployee Assistance Program (EAP)11+ Observed holidays and wellness days and flexible time offEmployee Stock Purchase Program with employee discountsWellness & Fitness initiativesEmployee recognition and referral programsAnd much moreBILL is an Equal Opportunity Employer. We believe our best ideas come from the unique stories, perspectives, and experiences of our team members. We welcome people of all backgrounds, abilities, and identities to bring their authentic selves and contribute to our culture.We are committed to a transparent, inclusive hiring process that reflects our values. If you need accommodations at any stage, please contact View email address on click.appcast.io . To ensure a fair evaluation, our Candidate Integrity Policy prohibits the use of unapproved external assistance, including generative AI, during live interviews or assessments. Doing so will result in a review and potential disqualification.Our Applicant Privacy Notice describes how BILL treats the personal information it receives from applicants. BILL