Staff Software Engineer (L4)

Location: Remote, based in Ireland; occasional travel may be required for project or team meetings.

Company

Twilio provides communications solutions that enable businesses and developers to create personalized customer experiences.

What you will do

• Own the reliability posture of production services, including availability, latency, capacity, performance, monitoring, and alerting.
• Define and operate against SLIs, SLOs, and error budgets to guide engineering priorities.
• Design failure-tolerant systems, validate recovery paths, and make production changes safer to deploy and roll back.
• Write, review, test, and deploy production code and automation that improves service reliability and reduces operational overhead.
• Lead incident response, post-mortem analysis, debugging, troubleshooting, and follow-up work to prevent recurrence.
• Drive cross-team reliability projects from conception to completion and provide technical leadership through design feedback, code review, and mentorship.

Requirements

• 8+ years of related engineering experience, including substantial experience in reliability, infrastructure, or platform engineering.
• Accountability for production systems, including on-call responsibilities and ownership during service failures.
• Strong software engineering fundamentals and experience shipping production code.
• Experience with SLIs, SLOs, error budgets, incident command, post-mortems, capacity planning, and observability.
• Experience driving changes across multiple teams and building alignment without formal authority.
• Experience with large-scale distributed systems in a cloud environment.

Nice to have

• Infrastructure-as-code, container orchestration, and GitOps-style delivery experience.
• Experience with multi-region architecture, failure-domain design, or regional expansion.
• Background in chaos engineering, game days, or proactive resilience validation.

Culture & Benefits

• Remote-first work with occasional in-person team, project, or customer meetings.
• Competitive pay and generous time off.
• Parental and wellness leave.
• Healthcare and a retirement savings program, with offerings varying by location.
• Opportunities to support volunteering and community initiatives.

Hiring process

• Hiring decisions are made by Twilio employees, with artificial intelligence used to support process efficiency.
• A formal interview process is required; offers are not made without interviews.