Senior Software Engineer - Identity & Security Products

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.

See yourself at Twilio

Join the team as Twilio’s Senior Software Engineer for Identity & Security Products, where you'll shape the future of our authentication, verification, and identity solutions that protect millions of users globally.

About the job

As a senior engineer on the Twilio Identity and Security team, you will play a significant role in designing and building our Identity solution which is in its early stages of development.  You will be responsible for the end-to-end development cycle, taking ideas from concept to delivery while ensuring our offerings are innovative, robust, and secure. We’re investing in exceptional technical talent like you to accelerate innovation and drive meaningful customer impact in an increasingly complex security landscape.

 

We're seeking a senior engineer who will work closely with their team and collaborate with Product Managers, while also making a broader impact across the organization. We’re looking for someone who thrives both as a team player and when working independently, and who is eager to take on new challenges beyond their comfort zone. You will excel in this role if you enjoy solving complex technical challenges, have a strong interest in advancing solutions within the identity and security domain and are passionate about building high-performing, secure services.  

 

Responsibilities

In this role, you’ll:

• Drive technical excellence by designing, implementing, and optimizing highly scalable distributed systems and full-stack features that power Twilio's Identity and Security products.
• Collaborate with cross-functional teams including product, design, and infrastructure to deliver customer-focused solutions.
• Improve the reliability, scalability, and efficiency of Twilio's Identity and Security’s systems.
• Drive best practices in software engineering, including code reviews, testing, and deployment processes.
• Contribute to architectural discussions and technical roadmaps.
• Communicate technical decisions clearly by articulating trade-offs, customer impact, and ensuring team alignment.
• Drive operational excellence by prioritizing observability, reliability, security and performance in all deliverables.
• Mentor junior engineers, fostering a culture of technical excellence, ownership, and continuous learning.

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:

• 4+ years of experience writing production-grade backend code in a modern programming language (e.g., Java, Golang, Python, or similar) with a focus on security, reliability, and performance.
• Familiarity with front-end technologies like JavaScript, TypeScript, and React (or similar frameworks).
• Strong fundamentals in distributed systems, event-driven and cellular architectures, and database design.
• Deep understanding of software engineering best practices, including monitoring, observability, and building maintainable systems.
• Experience working with AWS cloud-based infrastructure, CI/CD pipelines, testing, and automation.
• Well-versed in designing and building high-scale, low-latency services/APIs.
• Strong debugging and troubleshooting skills for complex distributed applications.
• Effective communication skills and ability to collaborate in a fast-paced team environment.
• Experience working with stakeholders at all levels, with the ability to thoroughly understand the details and mechanics of how things work as needed.
• Degree in Computer Science or related field, or equivalent work experience.

Desired:

• Experience wi