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Join Twilio's Flex Engineering team as a Staff Backend Engineer to set technical direction for TaskRouter, the real-time engine powering contact center interactions. You will operate as a senior technical leader across multiple services, owning architecture for problems spanning multiple quarters and organizational boundaries. You are accountable for platform scalability, performance, and availability as customer demand grows.
In this role, you will design, develop, and maintain backend services powering Twilio Flex's high-scale TaskRouter system. You'll set and own technical direction for business-critical backend services running on AWS, holding the architectural vision as it evolves. You will lead the design of large distributed systems changes covering scalability, data architecture, fault isolation, and migration strategy. You'll raise availability and resilience for Tier 0 systems, making deliberate tradeoffs between reliability, cost, and delivery speed.
You will partner with peer engineering teams, platform teams, and product to align on designs and unblock shared dependencies. You'll raise the engineering bar through design review, code review, and direct mentorship of senior and mid-level engineers. You will drive operational excellence through observability, gamedays, incident response, and converting recurring issues into permanent fixes. Additionally, you will influence roadmap priorities with engineering and product leadership, representing the team's technical position across the wider organization.
Twilio is a remote-first company with a strong culture of connection and global inclusion. You may be asked to report in person on an ad-hoc basis for team gatherings, functional off-sites, or customer meetings, and occasional travel may be required to participate in project or team in-person meetings.
**Requirements:**
Required:
- 8+ years of experience writing production-grade backend code in a modern programming language (Java, Golang, Python, Scala, or similar)
- Strong fundamentals and experience building fault-tolerant distributed systems, event-driven architectures, and database design
- Experience working with AWS cloud-based infrastructure
- Well-versed in designing and building high-scale, low-latency APIs
- Experience with database technologies like MySQL, PostgreSQL, or DynamoDB
- Strong debugging and troubleshooting skills for complex distributed applications
- Experience shipping services/products following CI/CD development paradigm
- Effective communication skills and ability to collaborate in a fast-paced team environment
- Comfortable with ambiguity and problem-solving in a rapidly growing company
Desired:
- Experience with event streaming technologies (Kafka, Pulsar, or similar)
- Familiarity with containerization and orchestration tools (Docker, Kubernetes)
- Solid grasp of Linux systems and networking concepts
- Background in building multi-tenant SaaS platforms at scale
- Experience with observability tools such as Prometheus, Grafana, or Datadog
- Experience working in a geographically distributed team
About Twilio
SaaS / Enterprise Software — authentication and identity infrastructure for developers.
