Principal Software Engineer - Identity Graph

Twilio is a company focused on shaping the future of communications and empowering developers worldwide. They are seeking a Principal Software Engineer to lead the development of an Identity Graph for the Fraud & Risk teams, focusing on building a foundational platform for real-time identity resolution.

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