: Principal Applied Scientist
101 Main Street
Cambridge, MA 02142

Employee Testimonials




Alexa Machine Learning is looking for an experienced science leader to head a team of talented and passionate applied scientists in the field of Natural Language Processing (NLP). A successful candidate will have strong foundations in mathematics, statistics and machine learning with exceptional communication and leadership skills, and a proven track record of delivery under tight deadlines. Hands-on experience with large-scale, state-of-the-art automatic speech recognition, natural language understanding or other natural language processing systems is a plus.

Our mission is to push the envelope in NLP, in order to provide the best-possible experience for our customers. As an Applied Scientist, you will lead a team of exceptional scientists to develop novel algorithms and modeling techniques to advance the state of the art in spoken language understanding. Your work will directly impact our customers in the form of products and services that make use of speech and language technology. You will leverage Amazon’s heterogeneous data sources and large-scale computing resources.


Graduate degree (MS or PhD) in Electrical Engineering, Computer Science, or Mathematics.
· More than 6 years of industrial/academic experience in data science, machine learning or a related field.
· Demonstrated use of modeling and optimization techniques tailored to meet business needs.
· Experience with leadership of experienced scientists as well as a record of developing junior members from academia/industry to a career track in a business environment.
· Familiar with programming languages such as C/C++, Java, Perl or Python


· PhD degree in Electrical Engineering, Computer Science, or Mathematics.
· More than 10 years of industrial/academic experience in building speech recognition and natural language processing systems (e.g. commercial speech products or government speech projects)
· Demonstrated experience to manage an industrial research team for at least 3 years.
· Excellent written and verbal communication skills
· Solid track record of thought leadership and contributions that have advanced the field

Amazon.com is an Equal Opportunity-Affirmative Action Employer – Minority / Female / Disability / Veteran / Gender Identity / Sexual Orientation


Employee Testimonials

Spyros M.
Senior Principal Scientist, Alexa Machine Learning

“For scientists, this is a great place for doing research because Amazon is very data-driven and metrics-oriented. The rigor expected in scientific publications in terms of running controlled experiments and tracking progress based on well-established metrics is exactly what we see in our team.”

“You also interact with people with strong technical and practical experience and learn from each other,” he says. “You’re exposed to a breadth of challenges, many of them long-term applications for artificial intelligence."

Chao W.
Alexa Science Manager

“Since 2000 I’ve been focused on developing spoken language and machine translation systems that can engage with humans more effectively, and hopefully break down language and other barriers,” Chao says. “We’re still far from systems that truly understand the meaning of what we’re saying, but the progress we’re making with Alexa is incredibly exciting.”

Janet S.
Senior Manager of Applied Modeling and Data Science

“We have much further to go in developing systems that can truly understand and converse with humans naturally.  But I’m incredibly proud of how far we’ve come with Alexa, and super excited about the work teams are doing to make Alexa smarter every day.”

Shankar A.
Senior Manager, Applied Science

“When I first joined the team I didn’t realize just how big and ambitious this initiative really is,” said Shankar. “What’s incredibly exciting for speech scientists like myself is how algorithmic innovations in machine learning and data science have created a sophisticated voiced-based AI like Alexa, and how our work on improving this technology has a positive impact on the day-to-day lives of millions of customers using it."

Chris C.
People Manager

“We have an incredibly diverse, experienced and curious team that is always pushing the envelope even further! Here at Amazon, we pride ourselves on being peculiar. We bring in talent from all around the world, leading to a diversity of background, culture and perspective in each team!” 

Beatriz R.
Team Manager

“I have quickly learned that Amazon is a company where you can actually voice out your ideas and concerns, where you can expect the support and interest of Leadership. We are quick to take action, passionate about improving processes and driven to enhance morale, so being able to speak up without fear has been my best asset. Now at the year mark at ADS, I am happy to say that the culture is one where you are proud to be a member of the team. “