Software Engineer L3

Job description

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 Software Engineer (L3). About the job The Phone Numbers Platform is the heartbeat of Twilio. In 2026, "getting a phone number" is no longer a simple API call; it is a sophisticated orchestration of global inventory, real-time identity verification (KYC), and automated regulatory compliance. As a Software Engineer (P3), you will own the technical strategy for a platform that processes millions of requests. You will be expected to pioneer AI-driven development workflows using LLMs and agentic agents to accelerate code generation, automate architectural reviews, and synthesize complex global telecommunications regulations into executable logic. Your mission is to collapse the distance between a great idea and a production ready feature. As a Software Engineer (P3), you will drive the design and implementation of key features for a platform that processes millions of requests. You will leverage modern AI-driven development workflows—including LLMs and agentic tools—to accelerate your code generation, streamline architectural reviews, and implement complex global telecommunications regulations into robust executable logic. Your mission is to efficiently turn great ideas into high-quality, production-ready features Responsibilities In this role, you’ll: • DRAW THE OWL: Contribute Significantly to the architecture and long-term technical roadmap for the Phone Numbers Platform, transitioning legacy systems into a modern, distributed microservices architecture that supports global scale. • ACCELERATE WITH AI: Lead by example in using AI coding assistants (GitHub Copilot, Anthropic Claude, or internal LLMs) to automate boilerplate, generate exhaustive test suites, and perform rapid prototyping. You will be measured on your ability to amplify your own output and the team's velocity through AI augmentation. • BE AN OWNER: Drive technical excellence in the team, making critical architectural decisions that balance rapid feature innovation with world-class reliability and security. • WEAR THE CUSTOMER’S SHOES: Partner with Product Managers to translate complex global telecommunications regulations and customer needs into elegant, developer-first APIs and application workflows. • EMPOWER OTHERS: Mentor and uplift junior and mid level engineers. Foster a culture of technical curiosity, ownership, and continuous learning. Teach the team how to move from "writing code" to "reviewing and orchestrating AI-generated logic" without sacrificing security or quality. • RUTHLESSLY PRIORITIZE: Identify and mitigate technical risks early, ranging from scalability bottlenecks to security vulnerabilities and lead the team through complex production incidents with a focus on long-term remediation. • WRITE IT DOWN: Articulate technical designs and system trade-offs clearly to your team and cross-functional partners through high-quality design documents, RFCs, and collaborative discussions. 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: • 5+ years of experience designing and developing highly available, high-scale, secure, mission-critical cloud-native enterprise distributed systems. • Strong Proficiency in Java or Python with solid knowledge of AWS ecosystems (Lambda, EKS, DynamoDB, Kafka). • Cloud-Native Architecture: Hands-on experience with cloud-native infrastructure (AWS preferred), microservices patterns, and building highly resilient systems. • AI-Augmented Development: Practical experience using AI tools (e.g., Copilot, Claude, Cursor) to accelerate software delivery. You should be comfortable discussing how you use LLMs for debugging, code synthesis, and prototyping. • API Design: Experience building and maintaining high-volume public-facing APIs with a focus on developer experience. • Data Proficiency: Experience with high-throughput data processing and storage solutions (SQL/NoSQL, Redis, Kafka, or Spark). • Infrastructure