Meet Our Team

Allison Hamburger
Favorite Graph: Desmos Art Project - Algebra 2
Allison joined Desmos as a Software Engineer in March 2019. She is passionate about creating technology that makes a positive social impact. She also loves math! Allison previously worked as a software engineer on Adobe Photoshop. Her favorite activities are camping and eating ice cream.
Anand Eng-Thakker
Favorite Graph: World Map
Anand left his first stint in the software world to teach at the Park School of Baltimore. There, he spent seven years teaching math and working with colleagues to create a full high school math curriculum designed to put puzzles and problems--and students’ questions, ideas, and conversations about them--at the center of the classroom. Since returning to software engineering, Anand has worked at Development Seed, using open source tools and open data for humanitarian ends, and more recently at Mapbox, building interactive map rendering libraries. Eventually, Anand plans to return to the math classroom once and for all, and so he’s thrilled to be at Desmos now, building the tools he’ll use when he gets there.
Ani Xu
Favorite Graph: Bojack Horseman
Ani has bounced between cold and colder (Toronto and Boston) for over two decades. She has two completely non-related degrees: one HBA from the University of Toronto (English, Political Science, History) and one MA from Dartmouth College (Globalization: Economy, Government). She accidentally fell into EdTech back in 2013 and has yet to fall out. She's super into evolving pedagogy and happened to do well in sales on account of being the right amount of awkward. She's also the person responsible for the original Game of Loans, Interest is Coming hat at graduation - you're welcome, Internet.
Chris Lusto
Favorite Graph: Drawing Machine
Chris grew up in the mountains of Northeast Pennsylvania and graduated from Villanova University with a degree in Economics. After serving as an artillery officer in the Marine Corps, he went on to study Math and Math Ed at the University of Minnesota. He taught at high schools in Minneapolis and a Pennsylvania town no one has ever heard of. Chris got into web development while working as a curriculum author at Mathalicious, creating interactive lesson content for students and teachers. He submitted so many feature requests to Desmos that they finally decided it would be easier just to hire him.
Christopher Danielson
Favorite Graph: Hello Kitty
Christopher has taught middle school and college math. He is fascinated by people’s (especially children’s) mathematical thinking, and he enjoys helping people make their thinking better. When he’s not on the Des-clock, he’s probably talking math with his kids, making pickles, playing Frisbee, or drinking coffee in a peaceful place.
Corey Hunt
Favorite Graph: We Bare Bears
Corey is a Product Designer at Desmos and works to make our tools even better to use every day. Corey graduated from the Pratt Insitute in 2014 with a BFA in Communication Design / Graphic Design and worked in government before joining Desmos. When Corey isn't crafting interfaces, he's developing something, designing something, taking photos, or planning the next trip.
Cori McElwain
Favorite Graph: Pirate Ship
Cori loves problem solving and has enjoyed math ever since her first algebra class. Her love of puzzles and interesting problems led her to study math and computer science in college, and since then she has been searching for the ultimate problem solving job. Cori is a programmer and self-taught designer who is excited to help solve important problems in math education at Desmos. When she isn’t staring at a computer, Cori can be found doing aerial silks, re-reading Harry Potter, or wandering the streets of San Francisco.
Dan Meyer, CAO
Favorite Graph: Tasty Fruit
Dan loves questions, the kind that rattle around in your brain at all hours, in the shower, etc. Math always had the most interesting questions for him as a kid. Then math education as an adult. He’s chased those questions through several continents, with thousands of teachers in talks and workshops, in a doctoral program at Stanford, finally landing at Desmos part time in 2012 and joining full time in 2015.
Dave Cesa
Favorite Graph: Binary
Dave joined Desmos as a graph specialist in July 2019. Prior to coming on board, Dave taught high school math for 11 years, often courses like Precalculus and Calculus, but also Geometry and Discrete Mathematics. Dave first introduced the students in his classes to the Desmos graphing calculator back in 2012, and was soon amazed at how its intuitive and accessible interface helped students quickly visualize and more fully understand key mathematical concepts. Dave now pours his energy into creating delightful animations and meaningful interactives with the graphing calculator. In his spare time, Dave enjoys running on trails in the woods, listening to podcasts, and following Cleveland’s pro sports teams.
Denis Lantsman
Favorite Graph: Harmonics
Denis grew up in a northern Russian city, and moved to the United States in his teens. After getting a CS/Math degree from Harvey Mudd College, he researched ways to make computers understand social behavior at Georgia Tech, and then worked on making computers more useful to human stomachs as a search engineer at Yelp. Growing up in a family of educators, Denis is very opinionated about how education should be done, and that makes him very excited to work at Desmos! When he’s not coding, Denis is slacklining, bouldering, playing bass or volunteering with K-5 kids in Oakland.
Eli Luberoff, CEO
Favorite Graph: Curvature
Eli began his programming life on his TI-83 graphing calculator in elementary school, culminating with a working version of Monopoly which was destroyed when he removed the backup battery by accident. He began working on the software that would become during a year-long hiatus from Yale University in 2007, returning to graduate summa cum laude with degrees in Math and Physics in 2009. Eli was also selected by Bloomberg Businessweek as one of the top 25 entrepreneurs under 25 in 2011.
Eric Berger, CTO
Favorite Graph: Binary Tree
Eric started and directed the Personal Robotics Program at Stanford University and Willow Garage, creating the PR2 robot and ROS software framework, which won the 2011 ACE award for Technology in the Service of Society. Eric is passionate about providing powerful tools for education, and making them accessible to a wide audience. He lives in Palo Alto with his wife, and spends his weekends kayaking and hiking.
Faith Moynihan
Favorite Graph: Cycloids and Epicycloids
In her career as a math teacher, Faith has taught in a diverse set of schools. In each of her classrooms Desmos has been the equalizer that helped ignite curiosity and spark rich, mathematical conversations. Faith is passionate about finding ways for all students to use math to explore and represent the world around them. When away from her computer, Faith can be found harvesting vegetables on her family’s farm.
Janessa Lidge
Favorite Graph: House Project
Born and raised in Queens, NY, with a B.A. in Economics from C.W. Post College, Long Island University. Janessa has a grown son and a 4-year-old granddaughter. She plays tennis recreationally whenever she can, and will be introducing her granddaughter to the sport very shortly, hoping she loves it as much as Nana does. Prior to joining Desmos, Janessa spent 20+ years as a Contracts Manager at a large telecom company, but knew she needed a change. She wanted to work for a company with a mission of improving lives and communities in a meaningful way. Desmos's culture is so different from all of her experience working in the corporate arena, perhaps because the overwhelming passion of every employee is to make a difference in the lives of students, starting in the classroom. Janessa loves that Desmos is dismantling traditional beliefs about how math should be taught and about how children best grasp the complexities of it, and she is excited about being a part of that transformation!
Jason Merrill
Favorite Graph: Golden Gate Bridge
Jason became interested in improving tools for interactive mathematics while earning his Ph.D. in physics from Yale University. At Yale, he helped to develop an extremely sensitive technique for measuring forces between microscopic charged particles in oil with an eye toward improving electronic paper displays. Since joining Desmos in October, 2011, Jason has helped to implement new plotting algorithms in the graphing calculator and has led the development of the Desmos API. When not programming, Jason enjoys cycling, swimming in lakes, observing fluid dynamics in tea cups, and arguing about the foundations of statistical mechanics and probable inference.
Jay Chow
Favorite Graph: Lifespan of an Island
Jay has spent his entire life learning and teaching in the most beautiful place in the world. He fell in love with Desmos in 2015 when Dan and Michael made a trip to Hawaii for a workshop. Jay has not looked back since and now uses Desmos as a tool for everything in life, ranging from managing his finances to decorating his home.
Jenny Wales
Favorite Graph: Swimmer & Shark
Originally from New Orleans, Jenny received a BS in product design from Stanford University. She likes thinking outside all sorts of shapes and polishing up new, amazing features on Desmos. When she’s not behind her computer, Jenny can be found in front of the candy jar.
Johnny Lin
Favorite Graph: Taipei
Johnny focuses on international / new markets for Desmos. Originally from low-key southern Taiwan, Johnny is an artist-turned-MBA with a passion for making learning more fun and more accessible. He has previously worked in strategy consulting with Bridgespan, supporting community schools in developing countries, and on international expansion with the ed tech startup Udemy. A lifelong waterbaby, Johnny is most in his element float-swimming in a warm ocean somewhere unfamiliar, then probably eating something delicious off some random street vendor.
Kathleen Hammill
Favorite Graph: とり2
Kathleen moved to the Bay Area from Southern California, where she was born and raised. Before moving from SoCal, she earned a BA in Cognitive Science and Philosophy from Occidental College. Kathleen spends much of her time thinking through puzzles and questions about people and their minds. As one of her close friends best put it, she enjoys thinking about thinking about thinking. When not in thought, she is watching movies or YouTube videos, losing herself in a song, or discussing miscellaneous topics with her friends.
Katy Elkin
Favorite Graph: Homero
Katy is passionate about bringing the world’s best math tools to our partners. She’s worked on the district side at the NYCDOE, and on the business side at McKinsey and Clever. Katy holds a BA from Michigan and an MBA & M.Ed from Stanford. To see this New York native at her happiest, you’ll find her on the ski slopes or eating a great slice of pizza.
Lisa Bejarano
Favorite Graph: An Eight Fold Rosette
Lisa Bejarano is a National Board Certified 14-year teaching veteran. Lisa enjoys supporting teachers to encourage and facilitate mathematical discourse and collaboration among their students. She develops and facilitates mathematics professional learning at district, state, and national levels and presents annually at NCTM conferences. Lisa has a Masters degree in curriculum and instruction from the University of Colorado and is the 2015 Presidential Awardee for Excellence in Mathematics and Science Teaching. When she is not thinking about how students learn, you will either find her running in the mountains with her dogs or making Islamic geometric art.
Matt Jenny
Favorite Graph: Blue Ridge Sunrise
Originally from Virginia's Shenandoah Valley, Matt has always loved puzzles and brain teasers. That naturally led to a love of math, and eventually to working as a software engineer where he gets to solve problems for a living. After graduating from the University of Virginia, Matt worked for five years as a full stack software engineer in the healthcare space before joining Desmos. When he's not working, there's a good chance he's playing Frisbee or soccer, cooking, or playing with his German Shepherd.
Michael Fenton
Favorite Graph: Boat!
Michael joined the Desmos Teaching Faculty in August 2015. Drawing on his experience as a classroom teacher, graduate school instructor, curriculum writer, and professional development consultant, Michael loves exploring how to use technology in ways that foster curiosity and creativity in the math classroom. He graduated from UCLA with a Bachelor of Science in General Mathematics and holds Master of Arts degrees in Education and Mathematics. Michael currently lives in Fresno, CA, with his beautiful wife Heather and their four energetic children.
Michelle Nguyen
Favorite Graph: The Office
Michelle loves tinkering with words and knows her way around a dangling participle. She’s worked as a content strategist for History and Backpacker and has degrees in International Relations and History. To get to know Michelle, offer her some hot tea and ask her where she’s traveled to or where she plans to travel to next.
Mike Haverstock
Favorite Graph: Lilo & Stitch
Mike Haverstock graduated from Indiana University with a degree in Computer Science. He cut his teeth building Flash-based software for online tutoring and collaboration, but has recently focused on pushing the limits of HTML5 and thinking about browser compatibility. Mike enjoys woodworking, experimenting with his CNC Router, and weekend getaways with his children.
Ryan Comeau
Favorite Graph: World Map
Ryan is passionate about leveraging technology to help everyone love learning math! He has worked in education over the last 8 years, both as a professor and in edtech. He holds his bachelor's and master's in philosophy where he specialized in mathematical logic and metaphysics. When not in the office you can usually find him mountain biking, backcountry skiing, or walking his tiny dog.
Sean Sweeney
Favorite Graph: Dandelion in the Breeze
Sean repeatedly could not pass his timed math tests in 5th grade, but was fortunate to have a mom that always believed in his abilities and a teacher who allowed for a writing accommodation. He went on to earn a degree in Computer Science and Engineering at Penn State, and found a love for teaching while spending his summers working at camps. Since then, he has spent much of his life trying to help others see the beauty and fun that he sees in math. Sean now works for Desmos doing math every day, and believes that play, exploration and joy are cornerstones of a successful math education. In his spare time he enjoys games, biking and spending time with his family.
Shelley Carranza
Favorite Graph: Lighthouse Functions
Shelley has taught middle and high school math, and more recently has been an instructional coach for mathematics in the Bay Area of California. She became interested in dynamic math software while at a local math conference in 2008, and has been designing tools ever since to support conceptual development and math talk in her classes. Shelley graduated from UC San Diego with a Bachelor of Arts degree in Mathematics Secondary Education as well as a Masters of Education. She enjoys hiking, chocolate tasting, and road trips with her family.
Shira Helft
Favorite Graph: Promposal
Shira loves puzzles of all kinds. This led to her infatuation with math and math learning; she is fascinated by the ways people think through ideas, how this affects their identity and power in society. Shira has been fortunate enough to learn as a teacher, coach, curriculum lead, and professional development coordinator at schools in the Bay Area. She is a Knowles Teacher Initiative Senior Fellow, Math for America Fellow, Woodrow Wilson Fellow and Hollyhock Fellow. In her spare time, Shira grows her brain with cryptic crosswords, puzzle hunts, and chasing the best dumplings in the Bay.
Stephanie Blair
Favorite Graph: The Tree of All Seasons
Stephanie taught middle and high school math before becoming a district math specialist. As a math specialist she worked closely with the math and technology departments to integrate technology into secondary math classrooms. She has a master's degree in curriculum and instruction from Portland State University. Stephanie lives in Oregon with her husband and son. When she isn’t thinking about how to improve students' experiences in math, you’ll find her spending time with her family or curled up with her cat, Oliver, reading a book...most likely Harry Potter.
Stephen Clower
Favorite Graph: Guitar
Stephen graduated from the University of North Texas with a degree in business computer information systems. After receiving his degree, he worked at the U.S. Department of Health and Human Services, IBM, and Ai Squared before joining the Desmos engineering team in February 2016. He is passionate about bringing accessible math tools to students around the world, including those with disabilities, and leads the company's accessibility initiatives. When he isn't working, he enjoys spending time with his family, drinking coffee, playing guitar, and working random quotes from The Simpsons in to every-day conversation.
Suzanne von Oy
Favorite Graph: Pentagon Construction
Suzanne is a graph specialist who joined the team in early 2018 after more than a decade working as a high school math teacher in Connecticut. A colleague introduced Suzanne to Desmos in 2014, and she was immediately blown away by the intuitive interface and the beautiful graphs. Desmos quickly became a fixture in her classroom and a creative outlet in her free time. Suzanne spent many evenings building elaborate graphs just for fun. All that time spent leisure graphing helped her develop a skill set that ultimately led to her dream job at Desmos, which she describes as equal parts math, art, and coding.
Zack Miller
Favorite Graph: Spiral
In elementary school, Zack's peers referred to him as the Human Calculator. Deciding to take it as a compliment, he relished the nickname. Many cosines later, Zack became a math teacher and stumbled upon a much better, non-human calculator that helped his students see the beauty and fun in math. He’s been hooked on Desmos ever since. Before working at Desmos, Zack held various teacher support roles and taught math on both coasts. He has an M.A. in Education from Stanford, is National Board Certified, and is a Math for America fellow. When he’s not cooking up Desmos activities, you can find him enjoying a Giants game or a podcast.
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