Principal Software Engineer

See yourself at Twilio

Join the team as Twilio’s next Principal Software Engineer.

About the job

This position is needed to lead the planning, design, development, and testing of large-scale software systems and new product capabilities, including cloud and internet-facing services. You’ll set technical direction, drive delivery using modern engineering practices, and ensure what we ship is secure, compliant, and production-ready. You’ll partner closely with product and engineering teams to turn requirements into reliable, high-quality software.

Responsibilities

In this role, you’ll:

• Lead architecture and system design for complex, distributed software systems; guide teams toward scalable, maintainable solutions.
• Design, implement, and review high-quality code for core services, APIs, platforms, and/or user-facing applications.
• Translate business goals into technical roadmaps, identify tradeoffs, and align stakeholders on solution direction.
• Improve system resiliency, latency, throughput, and cost efficiency; establish SLOs/SLAs and operational practices.
• Drive standards for coding, testing, CI/CD, observability, security, and documentation; champion automation and quality.
• Partner with engineering managers, staff engineers, and product leaders to coordinate delivery across multiple teams.
• Coach and mentor engineers at all levels; lead design reviews, incident postmortems, and technical deep dives.
• Identify technical risks early (sec