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Twilio

Staff Software Engineer – L4

Twilio

. Own the reliability posture of production services, including availability, latency, capacity, efficiency, performance, monitoring, and alerting .

Posted 9/29/2026full-timeRemote • IrelandLeadWebsite

Core Competencies

Role fit
Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in reliability engineering, focusing on production systems, incident management, and operational excellence. Proficient in defining and operating against SLIs and SLOs while driving cross-team collaboration and improvements in system stability.

Highest-signal resume keywords
Reliability EngineeringSLI/SLO Definition and OperationIncident ManagementProduction Code DevelopmentCross-Team Project Leadership

ATS Keywords

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Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills
Production Systems AccountabilityPost-Mortem AnalysisCapacity PlanningObservabilityCode ReviewDebuggingTroubleshootingInfrastructure as CodeContainer OrchestrationChaos Engineering
Soft Skills
MentorshipCommunicationCollaborationProblem-SolvingLeadership
Tools & Technologies
GitOpsCloud EnvironmentDistributed SystemsMonitoring ToolsAlerting Systems
Industry Keywords
Operational Toil ReductionFailure-Domain DesignMulti-Region ArchitectureProactive Resilience ValidationIncident Command

Tech Stack

Tools & technologies
CloudDistributed Systems

About the role

Key responsibilities & impact
  • Own the reliability posture of production services, including availability, latency, capacity, efficiency, performance, monitoring, and alerting
  • Define, instrument, and operate against SLIs and SLOs, using error budgets to drive engineering priorities
  • Identify stability risks and mitigate them before they affect customers
  • Reduce repair items and prevent recurring incident classes
  • Improve detection, response, and recovery times
  • Strengthen failure domains, validate recovery paths, and make production changes safer
  • Participate in on-call and lead responses when production is degraded
  • Write post-mortems, identify root causes, and drive follow-up work to completion
  • Identify, diagnose, report, and document production problems
  • Write, configure, and deploy maintainable, reviewed, documented, and tested code that improves reliability
  • Orchestrate complex changes across systems and services, including design changes, technical decisions, migrations, and upgrades
  • Lead debugging, troubleshooting, and analysis of service architecture and design
  • Use code review to improve code quality
  • Reduce operational overhead for infrastructure and services
  • Drive cross-team projects from conception to completion
  • Coordinate programs, estimate and communicate delivery timelines, track milestones, and update stakeholders
  • Identify and communicate changes that may impact stability

Requirements

What you’ll need
  • 8+ years of related engineering experience, with a substantial portion focused on reliability, infrastructure, or platform engineering
  • Demonstrated accountability for production systems, including having carried a pager for important services and owned outcomes during failures
  • Strong software engineering fundamentals and ability to build and ship production code
  • Experience defining and operating against SLIs and SLOs, and using error budgets to inform engineering priorities
  • Depth in production operations, including incident command, post-mortem analysis, capacity planning, and observability
  • Record of preventing recurrence by reducing incident classes and operational toil
  • Experience driving changes across multiple teams and building alignment without formal authority
  • Track record of improving engineers through code review, design feedback, and mentorship
  • Experience with large-scale distributed systems in a cloud environment
  • Familiarity with infrastructure-as-code, container orchestration, and GitOps-style delivery
  • Experience with multi-region architecture, failure-domain design, or regional expansion work
  • Background in chaos engineering, game days, or other proactive resilience validation

Benefits

Comp & perks
  • Competitive pay
  • Generous time off
  • Ample parental and wellness leave
  • Healthcare
  • Retirement savings program
  • Support for employee volunteering and donation efforts