Senior Infrastructure Engineer

Who we are At Twilio, we’re shaping the future of communications, all from the comfort of our homes. We deliver innovative solutions to hundreds of thousands of businesses and empower millions of developers worldwide to craft personalized customer experiences. Our dedication to remote-first work , and strong culture of connection and global inclusion means that no matter your location, you’re part of a vibrant team with diverse experiences making a global impact each day. As we continue to revolutionize how the world interacts, we’re acquiring new skills and experiences that make work feel truly rewarding. Your career at Twilio is in your hands. We use Artificial Intelligence (AI) to help make our hiring process efficient. That said, every hiring decision is made by real Twilions! . See yourself at Twilio Join the team as Twilio’s next Senior Infrastructure Engineer. About the job This position is needed to build and scale Stytch’s core product as we bring Stytch capabilities to Twilio’s full customer base, delivering secure, developer-first identity experiences. Join the Stytch team at Twilio to shape the next generation of identity products. You’ll design and build infrastructure that power authentication, authorization, and emerging agentic and non-human identity use cases. You’ll partner closely with product and engineering leadership to set direction, deliver high-impact features, and evolve our platform for Twilio scale. This is a rare chance to operate like a startup within Twilio: you’ll work in a high-ownership environment with startup speed, backed by Twilio’s reach and scale. Responsibilities Build and own the infrastructure and platform capabilities that power Stytch’s identity platform as it scales across Twilio—ensuring security, reliability, and performance for every customer. Design, implement, and operate scalable cloud infrastructure (AWS/EKS, ECS, networking, data stores), balancing uptime, cost, and developer velocity. Partner closely with Product and Engineering leadership to set infrastructure direction, translate platform needs into technical plans, and deliver high-impact roadmap work. Collaborate across Twilio and Stytch teams to align on architecture, integrate platform capabilities, and unblock cross-team initiatives. Operate with deep technical ownership: author design docs, drive key technical decisions, review code, and stay close to the systems you ship. Build in ambiguity—break down complex problems, make pragmatic tradeoffs, and adopt new technologies or strategies when they improve outcomes. Improve production quality and resilience through strong observability, incident response, automated remediation, and continuous reliability engineering. Make developers’ lives easier by building self-service tooling, safer deployment patterns, and reliable platform primitives that accelerate product teams. Mentor and support other engineers through pairing, feedback, and knowledge-sharing, helping raise the team’s technical bar and culture. Qualifications Twilio values diverse experiences from all kinds of industries, and we encourage everyone who meets the required qualifications to apply. If your career is just starting or hasn't followed a traditional path, don't let that stop you from considering Twilio. We are always looking for people who will bring something new to the table! *Required: 6+ years of experience as an Infrastructure or Platform Engineer building and operating high-scale, mission-critical cloud production systems. Strong experience with containerization and orchestration (Kubernetes/EKS, Docker), Infrastructure as Code (Terraform, GitOps, or similar) and AWS. Hands-on proficiency in at least one modern programming language used in production. Experience designing and running observability and on-call systems (e.g., Datadog, ELK, Prometheus/Grafana). Experience scaling cloud infrastructure for distributed systems, including relational databases and high-availability service architecture