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See yourself at Twilio.

Join the team as our next Principal Engineer, Twilio Flex.

Who we are & why we’re hiring

Twilio powers real-time business communications and data solutions that help companies and developers worldwide build better applications and customer experiences.

Although we're headquartered in San Francisco, we're on a journey to becoming a globally antiracist company that supports diversity, equity & inclusion wherever we do business. We employ thousands of Twilions worldwide, and we're looking for more builders, creators, and visionaries to help fuel our growth momentum.

About the job

This position is needed to help Twilo architect, implement and deliver new capabilities in the Twilio Flex platform. You will be the senior most technical member of a scrum team who will create usable, maintainable, and durable web applications, design, build, own and operate their microservices end to end in the cloud. You will play a key role in setting up and building out the Flex engineering capacity and capability in the Bengauluru office and build a center of excellence for Flex business unit. You be responsible for tackling some of the most complex and exciting technical problems in the industry, you will be working across the product scope based on priority needs and work directly with others to provide advice and guidance on implementation approach, lead cross-team technical discussions, build relationships across architecture and engineering to resolve bottlenecks and provide the best production solution. Additionally, you will influence roadmap priorities, propose innovative solutions that will enable Twilio to achieve its goal of being the world’s most trusted customer engagement platform.


In this role, you will:

  • Architect, design, develop, test and deploy Flex features and services in AWS cloud.
  • Own reliability of your services, respond to incidents and participate in on-call rotation and conduct RCAs for incidents.
  • Drive a team culture to meet SLA/SLO/SLI for your services.
  • Work with peer Principal Engineers,  Architects and Product Managers and decompose high level requirements into granular user stories.
  • Drive a team culture to meet Definition of Done for the software team builds.
  • Identify, Prioritize, refactor and reduce technical debt in your services.
  • Write automated unit and integration tests in a continuous integration and delivery environment.
  • Manage your work through the use of Github, Jira, and Twilio’s build/deploy systems.
  • Actively participate and lead Design, Code review, Backlog grooming, Agile ceremonies and work with team members and peers to meet team’s sprint commitments.
  • Work independently to troubleshoot/determine resolution for issues in your team's domain.
  • Be responsible for documentation of projects you work on.
  • Think strategically with an eye towards the future while being able to plot a course from the present.
  • Make critical decisions on high level technical strategy and set direction for a group of disparate engineers.
  • Comfortable working in a fast paced environment while continuously evaluating emerging technologies.
  • Take ideas from many different sources and guide a group towards consensus.
  • Ask questions when something doesn’t make sense, and take ownership of initiatives in an organized fashion.
  • Rapidly acquire new technical skills and knowledge in a fast-paced, highly disruptive industry environment.
  • Mentor and coach junior engineers, and positively influence their learning and growth.


Not all applicants will have skills that match a job description exactly. Twilio values diverse experiences in other industries, and we encourage everyone who meets the required qualifications to apply. While having “desired” qualifications make for a strong candidate, we encourage applicants with alternative experiences to also 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!


  • Bachelor’s or Master’s degree in Computer Science or related industry experience.
  • 12+ years of engineering experience, developing and maintaining high traffic, interactive, desktop-class web applications.
  • Working knowledge of architectural patterns for building mature services, especially for real time, distributed and multi-regional deployments based on microservices architecture.
  • Experience with UI technologies and Micro Frontend implementation - JavaScript, React, Angular.
  • Experience setting architectural direction for large scale, user facing web UI applications.
  • Experience with plug-in architectures in client-side applications.
  • Experience with releasing open-source JavaScript libraries via npm.
  • Experience with AWS, GCP or other public cloud infrastructure platforms.
  • Experience with container technologies - Docker/Kubernetes.
  • Extensive experience with REST API design and implementation.
  • Experience with browser APIs (REST, GraphQL, GRPC, and Protobuf) and optimizing front end performance.
  • Experience implementing modern automated testing and CI/CD pipelines.
  • Translate architecture vision into concrete system designs.
  • Champion of good engineering habits: development and test techniques, security, automation.
  • Strong expertise in solving complex production issues. 
  • Iterative development and deployment, Scrum and Agile methodologies.
  • Communicate clearly and concisely, orally and in writing.
  • Influence and build effective working relationships with all levels of the organization.


  • Experience with streaming systems such as Kafka, Flink, Spark.
  • Experience with SQL/NoSQL databases and caches.
  • Experience with Contact Center and Customer Engagement solutions.


This role will be located in our Bengaluru, India office. Approximately 5% travel is anticipated.

What we offer

There are many benefits to working at Twilio, including things like competitive pay, generous time-off, ample parental and wellness leave, healthcare, a retirement savings program, and much more. Offerings vary by location.

Twilio thinks big. Do you?

We like to solve problems, take initiative, pitch in when needed, and are always up for trying new things. That's why we seek out colleagues who embody our values — something we call Twilio Magic. Additionally, we empower employees to build positive change in their communities by supporting their volunteering and donation efforts.

So, if you're ready to unleash your full potential, do your best work, and be the best version of yourself, apply now!

If this role isn't what you're looking for, please consider other open positions.

Twilio is proud to be an equal opportunity employer. Twilio is proud to be an Equal Employment Opportunity and Affirmative Action employer. We do not discriminate based upon race, religion, color, national origin, sex (including pregnancy, childbirth, reproductive health decisions, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, genetic information, political views or activity, or other applicable legally protected characteristics. We also consider qualified applicants with criminal histories, consistent with applicable federal, state and local law. Additionally, Twilio participates in the E-Verify program in certain locations, as required by law.

Twilio is committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans in our job application procedures. If you need assistance or an accommodation due to a disability, please contact us at [email protected].


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