Principal Software Engineer – Machine Learning

Remote - US

Full Time Senior-level / Expert USD 140K to 221K
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Because you belong at Twilio.

The Who, What, Why and Where

Twilio is looking for a Machine Learning Engineer who wants to design, build, and deploy machine learning systems into the real world and help Twilio power the next-generation communications platform. You are eager to learn and inspire, and you like to think at scale and work in real world products and problems. You bring a focus on efficient experimentation, team collaboration, large-scale systems design, and good first-principles engineering. You want to develop skills and industry experience while working on machine learning-based products that have an impact on real customers 


Ideal candidates would have the following:

  • A Masters or PhD in Computer Science, Mathematics, Statistics, or another quantitative discipline
  • Strong background in the foundations of machine learning - familiarity or exposure to NLP, conversational systems, knowledge bases and/or search
  • 5+ years of hands-on experience with one of Python, C/C++ or Java/Scala
  • Strong fundamentals in systems design and engineering
  • Exposure to containerization and microservice architectures
  • Interest in the latest NLP-related algorithms and methods such as sequence-to-sequence models, contextual word and sentence embeddings, attention, etc.


As a Machine Learning Engineer, you will live the Twilio Magic values:

  • RUTHLESSLY PRIORITIZE: Work with other engineering teams and with members of the product organisation to distill internal and customer needs into requirements and tech specs.
  • DRAW THE OWL: Build new features without having all of the answers.
  • BE AN OWNER: Architect new systems with a focus on scalability, testability, and maintainability.
  • WEAR THE CUSTOMER’S SHOES: Help resolve technical issues and blockers for internal and external customers.
  • DON’T SETTLE: Drive high engineering standards on the team through code review, automated testing, and mentoring. We care what our code looks like, and you should too.
  • EMPOWER OTHERS: Collaborate with colleagues on a small, energetic team.


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 will be located remotely. Around the world, Twilio offers benefits and perks to support the physical, financial, and emotional well being of you and your loved ones. No matter where you are based, you will experience a company that believes in small teams for maximum impact; seeks well-rounded talent to ensure a full perspective on our customers’ experience,  understands that this is a marathon, not a sprint; that continuously and purposefully builds an inclusive culture that empowers everyone to do their best work and be the best version of themselves.

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.

In accordance with applicable law, the following represents Twilio's reasonable estimate of the range of possible compensation for this role if hired in Colorado.


Denver/Boulder Metro:

$160.896,00 - $221.232,00

Additionally, this role is eligible to participate in Twilio's equity plan.

Rest of Colorado:

$140.784,00 - $193.578,00

An overview of Twilio’s benefits offered is listed below:

Twilio is committed to delivering a comprehensive benefits program that provides support needed for you and your loved ones. It’s likely that you don’t think about benefits every day; however, they are an important component of your total compensation, and we want you to understand the options available to you so that you can make the most of your benefit dollars.  At the time of this posting, this role is eligible to participate in the following benefits, which Twilio reserves the right to modify at any time for any reason in accordance with applicable law:

Healthcare Insurance and Leave

  • Prescription Drug
  • Dental
  • Vision 
  • Flexible Spending and Health Savings Accounts
  • Leave programs for all of life’s moments: maternity, parental/bonding, as well medical leave to care for yourself or a loved one

Financial Benefits

  • Short and Long Term Disability Insurance
  • Life and Accidental Death & Dismemberment Insurance
  • 401(k) Retirement Savings Plan with a match

Reimbursement Programs & Stipends

  • $65 per month work-from-home stipend
  • Up to $50 per month for wellness expenses and activities
  • Up to $30 per month to use towards books/eBooks
Job region(s): Remote/Anywhere North America
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