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Senior API Developer

San Francisco, CA | Engineering

Job Description

About Us:

About the Job:  

  • We're seeking a Senior Engineer to join Twilio's API team and help build the best telecommunications API on the planet.
  • This is a senior role focused on building new parts of Twilio's public HTTP API, and maintaining the framework that it's built on.
  • Successful candidates will be strong developers with deep experience in HTTP and a passion for API design & REST.


  • Own the API framework that is the core of Twilio's business.  The Twilio API supports a wide range of communications functionality including voice calls, SMS messaging and phone numbers. The Twilio API must be highly reliable, highly available, and low latency.  
  • Work directly with product management to define, architect, and build new customer-facing Twilio APIs.  
  • Tackle some of the most challenging problems in distributed computing, HTTP, API design, and more.
  • Write quality, maintainable code with extensive test coverage in a fast-paced professional software engineering environment.


  • A Bachelors or Masters degree in Computer Science or Computer Engineering, or equivalent experience.
  • 4+ years in industry as a developer working with HTTP, in a variety of languages including Python.
  • Strong background in HTTP, networking, and security.
  • Experience with traditional RDBMS databases, such as MySQL, Postgres, Oracle, etc.
  • Hands on. Passionate. Persistent. Creative.

Bonus Points:

  • You have a favorite HTTP status code.
  • You have an opinion about rails' move to using PATCH.
  • You know what HTTP OPTIONS is and what you'd use it for.
  • You've written a SPDY client and loved it.

Perks include:   

  • Full benefits, including medical, dental and vision.
  • An Amazon Kindle on your first day, and $30/month to spend on books (Twilio wants you informed).
  • Pre-tax commuter benefits.
  • Catered lunches and a weekly team dinner featuring invited technology and entrepreneurial speakers.
  • Excellent gear (“We ❤ Apple computers and big monitors — two if you need ’em”);
  • A strong belief in life/work balance.
  • Twilio track jacket and shoes after demoing your first Twilio app in front of the company!

How to apply:

  • Applications without cover letters will not be considered. Here’s what you can include in your cover letter to move your resume to the top of the pile:            
    • Include a link to an app you built using Twilio.
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