Senior Frontend Engineer

React jobs at Twilio


Full TimeReact
Posted 3 years ago

Because you belong at Twilio

The Who, What, Why and Where

Twilio is looking for a Senior Frontend Engineer skilled at building rich, high fidelity front-end web applications that customers love to use! As a Senior Frontend Engineer, you will be part of the AI (Artificial Intelligence) business unit that works on products that use machine learning and natural language processing under the hood to provide insights and automation to our Flex customers. Twilio Flex allows businesses to programmatically customize every element of their contact centre experience – from the core infrastructure to the user interfaces.

We have a great team of engineers in our Madrid office and are excited to expand!


  • You have 4-8 years of experience building fast-rendering reusable and extendable components using HTML, CSS and modern JavaScript frameworks/libraries such as React, Redux, Typescript, styled-components, webpack, jest and enzyme.
  • You have experience in designing and implementing back-end services to power the Web front-ends.
  • You have experience in full stack engineering in PHP, Python, Java, or similar.
  • You have a track record of implementing & maintaining deployments involving client-side and server-side interaction.
  • You bring experience with build patterns common to web technology stacks and you love shipping amazing products and you sweat the little things around user experience.
  • You communicate well in person, on paper, and in code. You love to make an impact and thrive in small, collaborative, energetic teams.
  • You are product-focused, taking pride and ownership of beautiful user interfaces that are used by customers around the world.
  • You are a self-driven individual that will, in cooperation with others, propose solutions to problems with an attitude to get things done.
  • You enjoy talking to customers using your product who can give you feedback and from whom you can learn what to improve. 


As a Senior Frontend Engineer, you will:

  • Own and create intuitive, fluent and responsive user interfaces. Build fast-rendering reusable and extendable front-end components using React.
  • Build individual components as well as entire web applications.
  • Support multiple different user experiences powering the agent, supervisor, analytics experiences and components embedded on customer websites.
  • Collaborate with Designers, Product Managers, and Engineers.
  • Manage your work through the use of Github, Jira, and our build/deploy systems.
  • Aid in the testing of our code and the delivery of what we create to production
  • Build relationships with key engineers in your focus area.
  • Enjoy getting the MVP out the door, and you know that great user experience takes ongoing investment, refinement, and polish.


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.

With the launch of Flex, Twilio introduces a new type of platform for applications that has the potential to disrupt traditional monolithic application vendors in the same way API platforms disrupted traditional infrastructure services for communications, compute and payments.

In the AI business unit, we are delivering artificial intelligence and machine learning-based capabilities to our Flex customers all over the world.

Twilio is truly unique. We are a company committed to your growth, learning, 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 will be located in our beautiful office at Paseo de la Castellana, 77 in Madrid. You will also get to experience 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.


Twilio is proud to be an Equal Employment Opportunity employer.  We do not discriminate based upon race, religion, color, national origin, sex (including pregnancy, childbirth), sexual orientation, gender identity or expression, age, disability, political views or activity, or any other applicable legally protected characteristics. We also consider qualified applicants with criminal histories, consistent with applicable local law. Twilio is committed to supporting our disabled candidates in our job application process. If you need assistance or a change to the hiring process due to a disability, you may contact us at 

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