developer-apis enterprise-software telephony
Madrid, Spain

Senior Software Engineer (Backend) - Machine Learning Platform


Because you belong at Twilio

The Who, What, Where and Why


Twilio is looking for a Senior Software Engineer who wants to design, develop, deploy and operate services at scale for Twilio's Machine Learning Platform. As a Senior Software Engineer:

  • You are eager to learn from the team as well as inspire your teammates with your knowledge and skills.
  • You think about how data shapes software as much as how your code does. Thinking of scale comes naturally to you.
  • You have a keen sense of how data streams should be managed and how data should be organized.
  • You have experience working with key-value, document and relational data stores.
  • You have 5 years of experience building large distributed systems with high reliability and scalability.


As a key member of a collaborative and growing team, you will help shape the core of the product. You can expect to

  • Design, implement and operate REST APIs for Twilio products
  • Design, bootstrap and scale highly available and resilient JVM microservices and applications. Experience in Java (8 and above) and Python.
  • Define and implement tight integrations with other Twilio products and third party APIs
  • Setup and operate high throughput data pipelines to power the product, using technologies like Kafka and Spark
  • Define schemas for various types of data, setup appropriate data stores (MySQL, Cassandra, Redis) and operate them at scale
  • Direct experience with cloud based services (using AWS)
  • Mentor and train other team members on design techniques and coding standards


Twilio’s mission is to fuel the future of communications. Twilio is the brain of the most advanced communication deployments. From major enterprises around the globe to multi-billion dollar software companies, Twilio powers the communication layer of their entire customer experience. We're looking for a strong Senior Engineers to join our team and help us rapidly scale the system to the next level while maintaining a highly available mission-critical service.

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 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. Come join us.   


This position is located out of our Madrid, Spain office. You should expect the normal perks: catered meals, snacks, ergonomic desks, etc. 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, we know this is a marathon not a sprint; that builds an inclusive culture where we want all of our people to be comfortable and thrive. 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:

More than 2 million 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, and video by virtualizing the world’s telecommunications 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. Founded in 2008, Twilio has over 1,000 employees, with headquarters in San Francisco and other offices in Berlin, Bogotá, Dublin, Hong Kong, London, Madrid, Mountain View, Munich, New York City, Prague, Singapore and Tallinn.

Twilio is proud to be an equal opportunity workplace and is an affirmative action employer. We are committed to equal opportunity regardless of race, color, ancestry, religion, gender, gender identity, parental or pregnancy status, national origin, sexual orientation, age, citizenship, marital status, disability, or Veteran status.

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