Staff Mobile Software Engineer (P4)
About The Position
Twilio is hiring a Staff Mobile Software Engineer for Stytch to help scale identity and fraud-prevention products as Stytch capabilities are brought to Twilio’s customer base. The engineer will build mobile SDK products supporting authentication, fraud detection and prevention, and emerging agentic identity use cases. Working in a high-ownership, startup-like environment backed by Twilio’s reach and scale, this role partners with product and engineering leadership to deliver customer-facing features and evolve the platform for Twilio’s scale. The position is remote in the US or Canada, with occasional travel for project or team meetings. The role may also require ad-hoc in-person attendance for team gatherings, functional off-sites, or customer meetings. The schedule includes a non-standard on-call rotation covering weekends and holidays.
Requirements
- At least 6 years of professional mobile engineering experience, including designing, building, and maintaining mobile applications.
- Android development experience and fluency 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 for the long term.
- Experience making high-impact technical decisions and leading technical initiatives.
- Track record of driving technical excellence while keeping customer needs central.
- Exceptional communication and collaboration skills, including 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 hours in an on-call rotation that includes weekends and holidays.
Nice To Haves
- iOS development experience.
- Familiarity with Kotlin Multiplatform, C/C++, Swift, or Go.
- Experience building developer tools or SDKs.
- Hands-on builder mindset and passion for seeing work come to life.
Responsibilities
- Build and own mobile SDKs for Stytch identity and fraud-detection platforms on Twilio, including complex device-signal collection and SDK surfaces for authentication flows and agentic or non-human identity use cases.
- Partner with Product and Engineering leadership to set direction, translate customer needs into product capabilities, and deliver roadmap features.
- Collaborate across Twilio and Stytch teams on architecture, platform integrations, and cross-team initiatives.
- Author design documents, drive technical decisions, review code, and maintain hands-on ownership of shipped systems.
- Break down ambiguous problems, make pragmatic tradeoffs, and design developer experiences for customers.
- Improve production quality and resilience through observability, incident response, and remediation.
- Mentor and support engineers through pairing, feedback, and knowledge-sharing.
- Participate in a non-standard on-call rotation that includes weekend and holiday hours.
- Travel occasionally for project or team in-person meetings; ad-hoc attendance at in-person gatherings, off-sites, or customer meetings may also be requested.
Benefits
- Competitive pay.
- Generous time off.
- Parental and wellness leave.
- Healthcare.
- Retirement savings program.
- Health care insurance.
- 401(k) retirement account.
- Paid sick time.
- Paid personal time off.
- Paid parental leave.
- Potential eligibility to participate in Twilio’s equity plan and corporate bonus plan; offerings vary by location.
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What This Job Offers
Job Type
Full-time
Career Level
Senior
