Software Engineer (L3)

Role Description

Join the team as a Senior Software Engineer for Stytch, where you'll shape the next generation of identity products.

As a Senior Software Engineer you will help scale Stytch’s core product as we bring Stytch capabilities to Twilio’s full customer base, delivering secure, developer-first identity experiences. You’ll build backend APIs that power authentication, authorization, and emerging agentic and non-human identity use cases. You’ll partner closely with product and engineering leadership to design and deliver high-impact customer-facing features, and evolve our platform for Twilio’s scale. This is a rare chance to operate like a startup within Twilio: you’ll work in a high-ownership environment with startup speed, backed by Twilio’s reach and scale.

Responsibilities

• Build and own backend product capabilities for Stytch’s identity platform on Twilio—shipping new API surfaces and 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 our customers.
• Improve production quality and resilience through strong observability, incident response and remediation.
• Mentor and support other engineers through pairing, feedback, and knowledge-sharing, helping raise the team’s technical bar and culture.

Qualifications

• 6+ years experience in designing, building and operating high-scale, mission critical cloud based production systems.
• Familiarity with a production-grade code base in a modern programming language, applying best practice coding standards and writing high quality code.
• Extensive experience with RESTful API design and development.
• Bachelor’s degree in Computer Science or related industry experience.
• Excellent written and verbal communication skills.
• Schedule: ability to work non-standard, on-call rotation weekend and holiday hours.

Requirements

• Familiarity with Go, TypeScript, and DynamoDB.
• Experience building developer tools or SDKs.
• Experience building and owning products consumed by paying customers.
• Builder at heart. Through a hobby or your profession, you are passionate about being hands on and seeing your work come to life.

Benefits

• Competitive pay.
• Generous time off.
• Ample parental and wellness leave.
• Healthcare.
• Retirement savings program.
• Participation in Twilio’s equity plan and corporate bonus plan.
• Health care insurance.
• 401(k) retirement account.
• Paid sick time.
• Paid personal time off.
• Paid parental leave.