challenges
For Business
Who We Are
Results
search
Get Started
I want to launch a challenge
Connect to talented problem solvers
I want to solve a challenge
Join our community to win prizes
log in
menu
log in
challenges
For Business
Who We Are
Results
share
Follow
Following
Unfollow
Mark Dennis
share
Follow
Following
Unfollow
Munich, Bavaria, Germany
message
Read More about Mark
more
Awards
Awards
Badges
1 Year as a User
Followed a Challenge
Evaluated Submissions
