Principal Software Engineer - Identity Graph

Twilio is shaping the future of communications by delivering innovative solutions to businesses and empowering developers. As a Principal Software Engineer, you will be the technical anchor for building an Identity Graph, managing the platform's technical direction, and collaborating with various teams to drive alignment and manage expectations.

Responsibilities:

• Own the technical vision and system architecture for Identity Graph - evaluating and selecting the optimal technology stack to store complex identifiers and their relationships
• Design, implement, and maintain high-performance, synchronous read models capable of serving identifier topologies and risk postures fast enough for real time risk decisions
• Build out complex data pipelines optimized for multi-cadence hydration, margin real-time dynamic events, periodic batch enrichments and static reference data
• Bake in strict privacy boundaries and secure PII handling from day 1
• Partner closely with product and engineering leadership to manage expectations, set direction, and turn initial concepts into actionable plans
• Collaborate across Twilio and Stytch teams to align on architecture, integrate platform capabilities and unblock cross-team initiatives
• Wrangle ambiguity and execute with a bias for action in grey areas - proactively breaking down undefined problems, making pragmatic architectural trades offs and helping write requirements instead of waiting for them
• Establish strong production quality, resilience and observability standards for a large-scale data and distributed graph platform
• Deeply collaborate with the engineering team, prioritizing mentorship, knowledge-sharing, and pairing to elevate the team’s technical bar while actively bringing others along with you

Requirements:

• 8+ years experience in designing, building and operating high-scale, mission critical distributed systems, graph databases, and complex data models
• Deep hands-on expertise in a production-grade code base in a modern programming language, setting best practice coding standards and writing high quality code
• Proven experience serving as a strong technical anchor, owning system architecture and vision, and leading cross-functional engineering teams through implementation
• Exceptional ability to wrangle ambiguity and execute with a bias for action - proactively clarifying boundaries, defining scope and turning concepts into an actionable MVP
• Deep commitment to collaborative team dynamics and mentorship, with a track record of prioritizing bringing others along and actively raising a team's technical bar
• Excellent written and verbal communication skills with proven ability to manage stakeholder expectations and drive technical alignment across product and engineering
• Bachelor's degree in Computer Science or related industry experience
• Schedule: ability to work non-standard, on-call rotation weekend and holiday hours
• Familiarity with Go, Kubernetes, and DynamoDB or past experience with identity resolution or fraud detection systems
• Experience building 0-1 foundational platforms or complex data infrastructure that ensures clean separation between core substrates and downstream consumers
• Experience designing high-performance real-time synchronous read model and complex data pipelines
• Builder at heart. Through a hobby or your profession, you are passionate about being hands on and seeing your work come to life