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Salary: USD 171,120 - 251,600 / annual
Join Twilio as a Staff Mobile Engineer for Stytch, the identity and fraud prevention platform. You'll shape the next generation of mobile SDK products that power authentication, fraud detection, and emerging agentic identity use cases. Operating with startup speed backed by Twilio's scale, you'll have deep technical ownership and high autonomy.
Key Responsibilities:
- Design, build, and own mobile SDKs for Stytch's identity and fraud detection platforms, focusing on device internals for signal collection and new SDK surfaces for authentication flows and non-human identity use cases.
- Partner with Product and Engineering leadership to set technical direction, translate customer needs into product capabilities, and deliver high-impact roadmap features.
- Collaborate across Twilio and Stytch teams on architecture alignment, platform integration, and cross-team initiatives.
- Operate with deep technical ownership: author design docs, drive key technical decisions, review code, and maintain close connection to shipped systems.
- Break down complex problems, make pragmatic tradeoffs, and design developer experiences that delight customers.
- Improve production quality and resilience through strong observability, incident response, and remediation.
- Mentor and support other engineers through pairing, feedback, and knowledge-sharing to raise the team's technical bar.
Requirements:
- 6+ years of professional mobile engineering experience with deep expertise in designing, building, and maintaining mobile applications.
- Android development experience, fluent in Kotlin or Java.
- Expertise in mobile development ecosystems, frameworks, and third-party libraries.
- Deep understanding of software engineering best practices including monitoring, observability, and building maintainable systems.
- Proven track record of making high-impact technical decisions and leading technical initiatives.
- Demonstrated ability to drive technical excellence while keeping customer needs central.
- Exceptional communication and collaboration skills with ability to influence and align stakeholders.
- Bachelor's degree in Computer Science or equivalent industry experience.
- Ability to work non-standard, on-call rotation weekend and holiday hours.
Desired Qualifications:
- iOS development experience.
- Familiarity with Kotlin Multiplatform, C/C++, Swift, or Go.
- Experience building developer tools or SDKs.
- Builder mentality with passion for hands-on work and seeing projects come to life.
About Twilio
SaaS / Enterprise Software — authentication and identity infrastructure for developers.
