Software Engineer, (L2) Audiences & Journeys

Role Overview

Software Engineer (L2) — Audiences & Journeys at Twilio. You’ll build and scale APIs for the Twilio Audiences & Journeys products (a customer data platform/CDP), enabling developers to create personalized customer experiences. The team works on data-intensive systems, including trillions of API calls annually, and focuses on developer velocity, system reliability, and long-term architecture.

Responsibilities

• Design and build robust, scalable backend systems and APIs for audience and journey creation, segmentation, and activation.
• Collaborate cross-functionally with product, design, architecture, and other engineering teams to balance usability, performance, and long-term architecture.
• Communicate technical decisions clearly, including trade-offs, customer impact, and team alignment.
• Mentor junior engineers and contribute to a culture of technical excellence and continuous learning.
• Troubleshoot and improve reliability by debugging issues and refining operational tooling and processes.
• Participate in an on-call rotation for managed services.

Requirements

• 2+ years experience writing production-grade code in a modern programming language.
• Experience programming in Go, Java, or Python (or similar languages).
• Experience operating large-scale distributed systems on cloud infrastructure (AWS).
• Hands-on experience with container orchestration frameworks such as Kubernetes (including EKS/ECS).
• Experience with large-scale asynchronous processing systems.