The People
that make Stackle

Welcome to Stackle! We’re not just another tech company – our secret weapon is our amazing team. We bring a wide range of experiences to the table, from designing and building great digital products to expertise in technology-enabled learning and pedagogy.
What really sets us apart is our ability to work together as a team – we’ve been doing it for over a decade! This means that we’ve honed our skills and processes to deliver delightful experiences that meet the needs of our customers.
We’re passionate about creating innovative solutions that make a real difference in education and beyond. So, if you’re looking for a team with a winning combination of experience and innovation, you’ve come to the right place.
Sen Duffy Portrait

Sean Duffy


Say hi to Sean! He’s been in the education sector for over 22 years, which means he’s seen it all when it comes to educational technology and learning services.

Sean’s experience overseeing enterprise-scale system learning technologies is second to none, and he’s received numerous awards for his innovative work in teaching and learning.

But Sean’s not just a tech whiz – he’s also passionate about engaging with potential clients and building collaborative partnerships. He’s always looking for ways to ensure our products meet the needs and expectations of our customers, and he’s built a valuable network of partner organisations both within the EdTech community and beyond.

Thanks to Sean’s expertise and collaborative spirit, we’re able to stay ahead of industry trends and partner with others to tackle new challenges in education and beyond.

Brad Harrison

Brad Harrison

Head of Product

Brad is our resident education problem-solver extraordinaire! He’s spent his entire career designing and developing innovative learning tools and systems, all with the goal of making the learning process easy and fun.

Brad has been at the forefront of many groundbreaking initiatives, from early experiments with computer-based learning to the latest and greatest in virtual and augmented reality applications. But he’s not content with just building cool stuff – Brad also loves teaching others about educational technology.

Oleg Estrin

Oleg Estrin

Head of Design

Say hi to Oleg our design expert. Oleg has a Masters of Digital Design and 11 years of experience in higher education. He’s passionate about creating products that are easy to use for everyone involved in online learning.

Oleg is a bit of an all-rounder at Stackle so whether it’s user interface design, frontend development or server maintenance, he can handle it all. Oleg is always looking for new ways to improve our platform and make learning more enjoyable and accessible.

Michael Speirs

Michael Speirs

Head of Technology

Michael is our resident full-stack application guru! He’s been working in the higher education sector for 12 years (even before he graduated!) and has developed a wide-ranging skill set that makes him an essential member of our founder team.

Michael has led enterprise-scale developments with users from all over the world. His expertise means that Stackle is a reliable and stable platform that can handle anything you throw at it.