Jotform
Jotform enables you to create online forms, collect responses directly in your email, and create fillable PDF forms.
I worked at Jotform respectively at Maintenance Team, Growth Hackers Team and Engagement Hackers Team (current).
I contributed the Support Forum's text editor, a bunch of localization tools, product walkthrough, onboarding funnels, many A/B tests and some components used across the Jotform.
jotform.com