AeroLeads people directory · profile
Hwan-Joon Choi Email & Phone Number
Staff Engineer
at
Tenjin
1 work email found
@tenjin.io
1 phone found area 925
LinkedIn matched
✓ Verified Jul 2026
4 data sources
Profile completeness 100%
Current company
Role
Staff Engineer
Location
San Francisco, California, United States
Company size
Who is Hwan-Joon Choi? Overview
A concise factual answer block for searchers comparing this professional profile.
Quick answer
Hwan-Joon Choi is listed as Staff Engineer at Tenjin, a with 37 employees, based in San Francisco, California, United States. AeroLeads shows a work email signal at tenjin.io, phone signal with area code 925, and a matched LinkedIn profile for Hwan-Joon Choi.
Hwan-Joon Choi previously worked as Señor Engineer at Tenjin and server herder at Flickr. Hwan-Joon Choi holds Ms, Computer Science from Rensselaer Polytechnic Institute.
Company email context
Email format at Tenjin
This section adds company-level context without repeating Hwan-Joon Choi's masked contact details.
hchoi@tenjin.io
79% confidence
AeroLeads found 1 current-domain work email signal for Hwan-Joon Choi. Compare company email patterns before reaching out.
Profile bio
About Hwan-Joon Choi
para español oprima el dos
Listed skills include Javascript, Ruby On Rails, Mobile Devices, Mobile Applications, and 22 others.
Current workplace
Hwan-Joon Choi's current company
Company context helps verify the profile and gives searchers a useful next step.
Tenjin
12 roles
Hwan-Joon Choi work experience
A career timeline built from the work history available for this profile.
Señor Engineer
Current
Jan 2020 - Present
Server Herder
Sep 2014 - Nov 2019
Feb 2014 - Nov 2019
Builder Of Things
(Acquired by Yahoo)Distill provided web-based plugin-free video interview solution with Greenhouse.io, Jobvite, Exchange, and Google Apps integration. As the first engineer hired, I built out the product from scratch.
Feb 2013 - Feb 2014
Feb 2012 - Feb 2013
Senior Software Engineer
Ruby on Rails running on EC2 to support 1 million RPM from 500+ million devices. Tech lead on consumer site tapjoy.com with 8+ million users.
Jul 2010 - Feb 2012
Co-Founder
Developed and published several mobile apps, including Cool Curlings, which reached #2 in free iOS apps list.
Feb 2009 - Feb 2012
Software Engineer
I ate too much granola and sometimes worked on the backend services for mog.com streaming music platform. Ruby on Rails, JavaScript.
Feb 2010 - Jul 2010
Software Engineer
Rails and Javascript development to create browser-based spreadsheet and chart engine.
Nov 2008 - Jan 2010
Jan 2007 - Nov 2008
Junior Java Developer
Modified existing J2ME games to expedite porting.Ported J2ME games to different mobile devices.Created J2ME games in a team of 3 engineers, in parallel with BREW development.
Jun 2006 - Dec 2006
Team & coworkers
Colleagues at Tenjin
Other employees you can reach at tenjin.io. View company contacts for 37 employees →
PV
Pooja Viswanathan
Colleague at TenjinGreater Chicago Area, United States
View →
AM
Anurag Mohan
Colleague at TenjinGreater Chicago Area, United States
View →
SC
Sunny Cha
Colleague at TenjinSan Francisco, California, United States
View →
MT
Makoto Taguchi
Colleague at TenjinTokyo, Japan
View →
CB
Carole Brenner
Colleague at TenjinBerlin Metropolitan Area, Germany
View →
JG
Jack Gong
Colleague at TenjinHong Kong Sar, Hong Kong
View →
ET
Eric Tipton
Colleague at TenjinMarietta, Georgia, United States
View →
Pooja Viswanathan
Colleague at TenjinGreater Chicago Area, United States
View →
AM
Anurag Mohan
Colleague at TenjinGreater Chicago Area, United States
View →
SC
Sunny Cha
Colleague at TenjinSan Francisco, California, United States
View →
MT
Makoto Taguchi
Colleague at TenjinTokyo, Japan
View →
CB
Carole Brenner
Colleague at TenjinBerlin Metropolitan Area, Germany
View →
JG
Jack Gong
Colleague at TenjinHong Kong Sar, Hong Kong
View →
ET
Eric Tipton
Colleague at TenjinMarietta, Georgia, United States
View →
3 education records
Hwan-Joon Choi education
Ms, Computer Science
Rensselaer Polytechnic Institute
Mem, Engineering Management
Duke University
Bse, Electrical Engineering
Duke University
FAQ
Frequently asked questions about Hwan-Joon Choi
Quick answers generated from the profile data available on this page.
What company does Hwan-Joon Choi work for?
Hwan-Joon Choi works for Tenjin.
What is Hwan-Joon Choi's role at Tenjin?
Hwan-Joon Choi is listed as Staff Engineer at Tenjin.
What is Hwan-Joon Choi's email address?
AeroLeads has found 1 work email signal at @tenjin.io for Hwan-Joon Choi at Tenjin.
What is Hwan-Joon Choi's phone number?
AeroLeads has found 1 phone signal(s) with area code 925 for Hwan-Joon Choi at Tenjin.
Where is Hwan-Joon Choi based?
Hwan-Joon Choi is based in San Francisco, California, United States while working with Tenjin.
What companies has Hwan-Joon Choi worked for?
Hwan-Joon Choi has worked for Tenjin, Flickr, Yahoo, Distill, Inc., and Tapjoy.
Who are Hwan-Joon Choi's colleagues at Tenjin?
Hwan-Joon Choi's colleagues at Tenjin include Pooja Viswanathan, Anurag Mohan, Sunny Cha, Makoto Taguchi, and Carole Brenner.
How can I contact Hwan-Joon Choi?
You can use AeroLeads to view verified contact signals for Hwan-Joon Choi at Tenjin, including work email, phone, and LinkedIn data when available.
What schools did Hwan-Joon Choi attend?
Hwan-Joon Choi holds Ms, Computer Science from Rensselaer Polytechnic Institute.
What skills is Hwan-Joon Choi known for?
Hwan-Joon Choi is listed with skills including Javascript, Ruby On Rails, Mobile Devices, Mobile Applications, Ruby, Ios, Android Development, and Git.
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