Staff Mobile Software Engineer (P4)

Overview

Join Twilio as a Staff Mobile Software Engineer for Stytch, building mobile SDKs for identity and fraud prevention products.

What you'll do

• Build and own the mobile SDKs for Stytch's identity and fraud detection platforms on Twilio, going deep on device internals for complex signal collection to improve identification of bad actors.
• Ship new SDK surfaces powering core authentication flows, including agentic and non-human identity use cases.
• Partner with Product and Engineering leadership to set direction, translate customer needs into product capabilities, and deliver high-impact roadmap features.
• Collaborate across Twilio and Stytch teams to align on architecture, integrate platform capabilities, and unblock cross-team initiatives.
• Operate with deep technical ownership: author design docs, drive key technical decisions, review code, and stay close to the systems you ship.
• Build in ambiguity: 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.

What you'll need

• 6+ years of professional mobile engineering experience, with deep experience designing, building and maintaining mobile applications.
• Android development experience, fluent in Kotlin or Java.
• Expertise in mobile development ecosystems, frameworks, and 3rd party libraries.
• Deep understanding of software engineering best practices, including monitoring, observability, and building maintainable systems.
• Experience making high-impact technical decisions and leading technical initiatives.
• A proven track record of driving technical excellence while keeping customer needs at the center of your work.
• Deep understanding of software engineering best practices, including monitoring, observability, and building for the long term.
• Exceptional communication and collaboration skills, with the ability to influence and align stakeholders.
• Bachelor's degree in Computer Science or related industry experience.
• Excellent written and verbal communication skills.
• Ability to work non-standard on-call rotation, weekend and holiday hours.

Nice to have

• iOS development experience.
• Familiarity with Kotlin Multiplatform, C/C++, Swift or Go.
• Experience building developer tools or SDKs.
• Builder at heart: passionate about being hands on and seeing your work come to life.

Details

• Remote role, in either the US or Canada.
• May be required to travel occasionally for project or team in-person meetings.
• May be asked to report in person on an ad-hoc basis for team gatherings, functional off-sites or customer meetings.
• Estimated pay: $171,120 - $213,900 (Colorado, Hawaii, Illinois, Maryland, Massachusetts, Minnesota, Vermont or Washington D.C.); $181,200 - $226,500 (New York, New Jersey, Washington State, or California outside the San Francisco Bay area); $201,280 - $251,600 (San Francisco Bay area, California).
• May be eligible for Twilio's equity plan and corporate bonus plan.