Staff Software Engineer (L4)
About this job
Twilio is shaping the future of communications and empowering developers globally to build personalized customer experiences. As a Staff Software Engineer (L4) on the Flex Engineering team, you will shape the technical path for TaskRouter, the real-time engine driving contact center routing. You will lead multiple services as a senior technical authority, take charge of system architecture across organizational boundaries, and ensure the platform scales effectively as customer demand increases. A normal day involves authoring design documents for architecture boards, making critical architectural tradeoffs, reviewing code, mentoring engineers, driving operational excellence through incident response, and collaborating with product and platform teams to align on roadmap priorities in a remote work setting.
Responsibilities
- Design and maintain backend services powering the TaskRouter system.
- Define technical direction and architectural vision for critical AWS backend services.
- Lead large distributed system designs focusing on scalability, fault isolation, and migrations.
- Improve Tier 0 system availability by balancing reliability, cost, and delivery speed.
- Mentor mid-level and senior engineers through code and design reviews.
- Drive operational excellence via observability, gamedays, and permanent fixes for recurring issues.
- Collaborate with product and engineering leadership to influence roadmap priorities.
Requirements
- 8+ years of experience writing production-grade backend code in languages like Java, Golang, Python, or Scala.
- Strong fundamentals in building fault tolerant distributed systems, event-driven architectures, and database design.
- Experience working with AWS cloud-based infrastructure.
- Proficiency in designing high-scale, low-latency APIs.
- Experience with databases such as MySQL, PostgreSQL, or DynamoDB.
- Strong debugging skills for complex distributed applications.
- Experience shipping services using CI/CD methodologies.
Good to have
- Experience with event streaming technologies like Kafka or Pulsar.
- Familiarity with containerization and orchestration tools such as Docker and Kubernetes.
- Solid understanding of Linux systems and networking concepts.
- Background in building multi-tenant SaaS platforms at scale.
- Experience with observability tools including Prometheus, Grafana, or Datadog.
Who should apply
This role suits experienced backend engineers with a strong background in distributed systems and cloud infrastructure who enjoy tackling complex architectural challenges. Candidates should have extensive experience leading technical direction and mentoring peers. Freshers cannot apply as the position explicitly requires 8+ years of professional backend development experience.
Frequently asked questions
What is the primary responsibility of a Staff Software Engineer (L4) at Twilio?
The role involves setting technical direction for TaskRouter, owning backend architecture, scaling systems, and mentoring engineers within Twilio Flex Engineering.
Is the Staff Software Engineer (L4) role at Twilio remote?
Yes, the position is remote with a base in India across Karnataka, Tamil Nadu, Telangana State, Maharashtra, and New Delhi, though occasional in-person travel may be required.
What experience is required for the Staff Software Engineer (L4) position at Twilio?
Candidates must have 8+ years of experience writing production-grade backend code in languages like Java, Golang, Python, or Scala.
What cloud platform does Twilio Flex Engineering use for this role?
The engineering services for this role run on AWS cloud-based infrastructure.
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