Because you belong at Twilio

The Who, What, Why and Where


At Twilio we believe that machine learning is critical for empowering web-scale businesses to secure online interactions and transactions. As a Principal Software Engineer in the Account Security team, you will research and apply the latest big data and machine learning techniques to power core business products like Lookup and Verify.

You are passionate about collaborating with multiple teams to evangelize and build new ways to use big data and machine learning. Your services will go from concept to exponential growth in a very short period of time. While you definitely enjoy getting an MVP out the door, you also know that to take services to scale requires developing a complex distributed platform and you will be concerned with availability, throughput, latency and real-time responsiveness.

You have strong communication & collaboration skills, and a belief that team output is more important than individual output. You are keen to share your technical expertise with other engineers and lead them through an accelerated learning process.

You have an advanced degree in Statistics, Machine Learning, Computer Science, Electrical Engineering, Applied Mathematics, Operations Research, or a related field.


As a Principal Engineer you will be responsible for:

  • Driving architecture and building systems for multiple orders of magnitude of growth.
  • Take full end-to-end ownership of your services, from designing to operations and monitoring in production.
  • Working in a fast paced environment and continuously evaluating emerging technologies while mentoring and helping grow engineers.
  • Tackling some of the world's most complex distributed system challenges, at an enormous scale, often exceeding hundreds of millions of transactions per month.
  • Maintaining a 99.999% of both API availability and success rate. There's no maintenance windows ever at Twilio.
  • Engaging with multiple teams to resolve multi-faceted architectures problems.
  • The position requires a practical understanding of machine learning and data science concepts, and a track record of solving problems with these methods.


Account Security Engineering is the founding team of our Bogota office. Our developers build the leading Authy multi-factor authentication app used by millions around the world. Every day we push the boundaries of web-scale service delivery, operating with utmost reliability the API services that secure the online presence of the biggest brands. We are passionate about crafting simple APIs that developers will love. 

By joining us you will have the opportunity to work with a team of bright and supportive professionals who will care about helping you on a successful career path.Twilio is truly unique; we are a company committed to your growth, your learning, your development, and your entire employee experience. We only win when our employees succeed and we're dedicated to helping you develop your strengths. We have a cultural foundation built on diversity, inclusion, and innovation and we want you and your ideas to thrive at Twilio.


This position will be located in our office building in Bogota, Colombia. You will enjoy our perks: catered meals, snacks, monthly All Hands and more. What you will also get to experience is a company that believes in small teams for maximum impact; that strives to balance work and home life, that understands that this is a marathon, not a sprint; that continuously and purposefully builds an inclusive culture where everyone is able to do and be the best version of themselves. We seek people who naturally demonstrate our values, who are challenged by problems, empower others to thrive, people who can draw the owl and not be beholden to one playbook.

About Us

Millions of developers around the world have used Twilio to unlock the magic of communications to improve any human experience. Twilio has democratized communications channels like voice, text, chat, video and email by virtualizing the world’s communications infrastructure through APIs that are simple enough for any developer to use, yet robust enough to power the world’s most demanding applications. By making communications a part of every software developer’s toolkit, Twilio is enabling innovators across every industry — from emerging leaders to the world’s largest organizations — to reinvent how companies engage with their customers.

invest in weeks dedicated to tackling hard problems and creating your own ideas. We have a cultural foundation built on diversity, inclusion, and innovation and we want you and your ideas to thrive at Twilio.

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Twilio invites you to self-identify your personal demographic information to help continue our mission to foster inclusivity and diversity in our workplace. In keeping with the Twilio Magic, our values set the foundation for how we act, how we make decisions and how we win. These values shape our work culture and demonstrate our dedication to ensuring everyone is welcomed and supported. We invite you to self-identify your gender. Completing this survey is voluntary and you may select “Decline to Disclose”, but we hope you choose to participate.

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