[Remote] Senior Software Engineer

Note: The job is a remote job and is open to candidates in USA. Twilio is a company focused on shaping the future of communications through innovative solutions. They are seeking a Senior Software Engineer to develop fraud detection and prevention products, primarily working on the Device Fingerprinting product to protect customers from fraud and abuse.ResponsibilitiesBuild and own fraud detection capabilities for Stytch’s fraud platform on Twilio—go deep on browser and device internals for complex signal collection to improve identification of bad actors and keep our customers safePartner with Product and Engineering leadership to set direction, translate customer needs into technical plans, and deliver high-impact roadmap featuresCollaborate across Twilio and Stytch teams to align on architecture, integrate platform capabilities, and unblock cross-team initiativesOperate with deep technical ownership: author design docs, drive key technical decisions, review code, and stay close to the systems you shipBuild in ambiguity—break down complex problems, make pragmatic tradeoffs, and adopt new technologies or strategies when they improve outcomesImprove production quality and resilience through strong observability, incident response and remediationMentor and support other engineers through pairing, feedback, and knowledge-sharing, helping raise the team’s technical bar and cultureSkills6+ years experience in designing, building and operating production systemsFamiliarity with C/C++, production experience not necessaryFamiliarity with a production-grade code base in a modern programming language, applying best practice coding standards and writing high quality codeBachelor's degree in Computer Science or related industry experienceExcellent written and verbal communication skillsSchedule: ability to work non-standard, on-call rotation weekend and holiday hoursFamiliarity with Javascript, Go, WebAssemblyExperience with reverse engineering and/or reverse engineering detection and prevention such as experience with browser automation, botting, and/or fraud detection and defense techniquesOffensive and/or defensive security software engineering experienceBuilder at heart. Through a hobby or your profession, you are passionate about being hands on and seeing your work come to lifeBenefitsCompetitive payGenerous time-offAmple parental and wellness leaveHealthcareA retirement savings programEquity plan and corporate bonus planHealth care insurance401(k) retirement accountPaid sick timePaid personal time offPaid parental leaveCompany OverviewTwilio is a cloud communication company that enables users to use standard web languages to build voice, VoIP, and SMS apps via a web API. It was founded in 2008, and is headquartered in San Francisco, California, USA, with a workforce of 5001-10000 employees. Its website is https://www.twilio.com/.Company H1B SponsorshipTwilio has a track record of offering H1B sponsorships, with 12 in 2026, 215 in 2025, 168 in 2024, 209 in 2023, 369 in 2022, 264 in 2021, 157 in 2020. Please note that this does not guarantee sponsorship for this specific role.