JavaScript Engineer, Voice (L3)

Posted May 10

Join the team as our next Voice JavaScript SDK Engineer

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 build and deliver Voice functionality to our customers through the JavaScript SDK. Programmable Voice is one of Twilio’s foundational channels which empowers our customers and internal product team to build delightful solutions. The features you deliver will be used by thousands of customers at scale, often as their business’ lifeline. Use cases range from contact centers to healthcare services, from warehouse staff to client advisors.


In this role, you’ll:

  • Use your skills and creativity to solve problems and build functionality into Twilio’s Voice JavaScript SDK
    • Customers use the SDK on major desktop and mobile browsers - e.g. Chrome, Safari and Firefox
  • Drive the design, development and shipping of significant new features with predictable velocity
  • Work closely with a talented team of cross-functional engineers, designers and product managers.
  • Continuously adapt to the evolving JavaScript ecosystem to maximize engineering efficiency
    • CI/CD pipeline
    • Enhance automated tests
  • Own Twilio’s customer’s developer experience
    • Monitor and triage customer issues and Git repo issues
    • Enhance Twilio Voice reference apps


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!


  • JavaScript professional with extensive experience in building cross-browser JavaScript applications
    • Extensive experience with Typescript
    • Experience with MVC (Angular, Vue.js, React)
    • Experience with backend JS server - e.g. Node.js, express
  • 5+ years of software development experience
  • Extensive experience with
    • Code repositories, version control (Git preferable)
    • REST APIs, WebSockets
  • Experience with
    • Contributing to and creating JavaScript libraries
    • Building JS applications from scratch
    • Modern JS ecosystem - e.g. Webpack, Babel, Browserify
    • Building open source software
  • Champion of automated build and test pipelines and test-driven development - e.g. Mocha, Karma, Jest
    • Maintained high level of code coverage
  • Strong written communication: proven track record of delivering customer facing documentation


  • Knowledgable or interested in WebRTC or comparable media engine
  • Experience with automated test tools - e.g. Selenium


This role will be remote US

What We Offer

There are many benefits to working at Twilio, including, in addition to competitive pay, things like 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.

Please note this role is open to candidates outside of Colorado as well. The information below is provided for those hired in Colorado only.

If you are a Colorado applicant:

  • The estimated pay range for this role, based in Colorado, is 116,688.00 - 145,860.00.
  • Additionally, this role is eligible to participate in Twilio's equity plan.

The successful candidate’s starting salary will be determined based on permissible, non-discriminatory factors such as skills, experience, and geographic location within the state. This role is also eligible to participate in Twilio’s equity plan and for the following benefits: health care insurance, 401(k) retirement account, paid sick time, paid personal time off, paid parental leave.

Misc Info For This Position:

Remote Mix: 100% Remote

Job Type: Full-Time

Regional Restrictions: USA Only

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United States


Job Info:
100% Remote

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