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Twilio is seeking a Senior Software Engineer (L3) to own the technical strategy for the Phone Numbers Platform, a critical system processing millions of requests globally. This role sits at the intersection of infrastructure, AI-driven development, and telecommunications compliance.
You will architect and implement the modernization of legacy systems into a distributed microservices architecture supporting global scale. The platform handles sophisticated orchestration of global inventory, real-time identity verification (KYC), and automated regulatory compliance across multiple jurisdictions.
Key responsibilities include:
- Contributing significantly to the architecture and long-term technical roadmap, driving the transition to modern, scalable infrastructure
- Leading by example in AI-augmented development workflows using GitHub Copilot, Claude, and internal LLMs to accelerate code generation, automate testing, and enable rapid prototyping
- Owning technical excellence through critical architectural decisions that balance rapid feature innovation with reliability and security
- Translating complex global telecommunications regulations and customer needs into elegant, developer-first APIs
- Mentoring junior and mid-level engineers, fostering a culture of technical curiosity and ownership
- Identifying and mitigating technical risks early, from scalability bottlenecks to security vulnerabilities
- Articulating technical designs and system trade-offs through design documents, RFCs, and collaborative discussions
Required qualifications:
- 5+ years designing and developing highly available, high-scale, secure, mission-critical cloud-native distributed systems
- Strong proficiency in Java or Python with solid AWS knowledge (Lambda, EKS, DynamoDB, Kafka)
- Experience with distributed systems, microservices architecture, and cloud infrastructure
- Demonstrated ability to mentor and lead technical teams
Twilio is a remote-first company with a global, inclusive culture. The role offers the opportunity to work on infrastructure that powers hundreds of thousands of businesses and millions of developers worldwide.
About Twilio
SaaS / Enterprise Software — authentication and identity infrastructure for developers.
