Twilio seeks a Staff Software Engineer for the Data Substrate team to design and implement large-scale, reliable data systems and storage/processing frameworks. Requires 8+ years of software development experience, expertise with distributed systems and big data technologies (Hadoop, Spark, Kafka), experience with AWS, proficiency in Python/Java/Scala, and hands-on experience with Data Lakehouse formats (Hudi, Iceberg, Delta). Role is remote within the United States (some US states excluded) and may require occasional travel for meetings.

This remote-in-USA Software Engineer (L2) role on Twilio’s Voice Connectivity Trust team involves full SDLC ownership—designing, implementing, deploying, and operating distributed, real-time voice services. Required experience includes JVM/Java, REST and event-driven architectures (Kafka, SQS), cloud platforms (AWS/GCP/OpenStack/Azure), CI/CD, monitoring/alerting tools (Prometheus/Datadog/Grafana), on-call experience, and strong written communication including working with AI coding assistants. The role may require occasional travel and is not eligible for hire in certain U.S. states listed in the posting.

Join Twilio to develop fraud detection and prevention products (primarily device fingerprinting) as part of integrating Stytch capabilities into Twilio. Responsibilities include designing and operating production systems, collaborating with product and engineering leadership, improving observability and resilience, mentoring engineers, and participating in on-call rotations. Required: 6+ years experience and expertise in C or C++ (production experience preferred).