Senior Software Engineer
Current
Sep 2021 - Present
AeroLeads people directory · profile
Jan Koszewski Email & Phone Number
Senior Software Engineer at Github
at
GitHub
1 work email found
@github.com
2 phones found area 515 and 703
LinkedIn matched
✓ Verified Jul 2026
4 data sources
Profile completeness 100%
Current company
Role
Senior Software Engineer at Github
Location
Arlington, Virginia, United States
Company size
Who is Jan Koszewski? Overview
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Quick answer
Jan Koszewski is listed as Senior Software Engineer at Github at GitHub, a with 501 employees, based in Arlington, Virginia, United States. AeroLeads shows a work email signal at github.com, phone signal with area code 515, 703, and a matched LinkedIn profile for Jan Koszewski.
Jan Koszewski previously worked as Senior Software Engineer at Github and Lead Software Engineer at Stitch Fix. Jan Koszewski holds Bachelor Of Arts (Ba), Political Science And Government from Grinnell College.
Company email context
Email format at GitHub
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{first_initial}{last}@github.com
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AeroLeads found 1 current-domain work email signal for Jan Koszewski. Compare company email patterns before reaching out.
Profile bio
About Jan Koszewski
Jan Koszewski is a Senior Software Engineer at Github at GitHub. He possess expertise in rails, ruby, ruby on rails, objective c, ios development and 8 more skills.
Listed skills include Rails, Ruby, Ruby On Rails, Objective C, and 9 others.
Current workplace
Jan Koszewski's current company
Company context helps verify the profile and gives searchers a useful next step.
Github
10 roles
Jan Koszewski work experience
A career timeline built from the work history available for this profile.
Lead Software Engineer
May 2020 - Aug 2021
Senior Software Engineer
Jun 2018 - May 2020
Software Engineer
Sep 2016 - May 2018
Senior Software Development Engineer
Responsible for all engineering efforts related to the LivingSocial merchant platform; responsible for code review and architecture decisions on 19+ merchant-specific applications, gems, and apis; regularly mentor junior developers and pair with senior level engineers across the LivingSocial build team to enhance and improve the merchant experience
Jun 2016 - Sep 2016
Career Software Development Engineer
Member of merchant web core services team that oversees development on the LivingSocial Merchant Center merchant web portal; primary engineer for new feature development on Merchant iOS app. Implemented realtime offer adjustment and cap management. Merchants can pause or set specific times when their promotions are featured throughout the LivingSocial platform and increase or reduce the quantity and type of offers visible to consumersImplemented impersonation feature for LivingSocial staff on merchant iOS app. LivingSocial staff can directly recreate a merchant’s experience on their own iOS device to help troubleshoot support issues, field merchant questions, and better optimize the merchant platform experience
Jan 2014 - May 2016
Associate Software Development Engineer
Junior member of the merchant web core servces team at LivingSocial. Worked to implement the merchant demo website so that LivingSocial sales staff can showcase the full web experience to prospective merchants using tailored data without needing to access the production web portal
Aug 2012 - Jan 2014
Hungry Academy Developer In Training
Intensive five-month ruby on rails bootcamp. Tasked with developing and deploying a ruby command line application or rails web application every 1-2 weeks in teams of 2-4 other developers in trainingKey projects included a csv-parsing ruby CLI and singleton datastore, a redesign of the donorshoose.com homepage written in spine.js, a service-backed real-time chat client, and a mastery project that displayed a realtime feed of tweets about LivingSocial deals with a user’s corresponding Klout score as a metric for social influenceDelivered 6+ lightning talks on topics such as division in binary, Webkit, Ember.js, and Django
Mar 2012 - Jul 2012
Software Testing Associate
Dec 2011 - Mar 2012
Grinnellcorps Fellow
Jul 2008 - Jun 2009
Team & coworkers
Colleagues at GitHub
Other employees you can reach at github.com. View company contacts for 501 employees →
JK
Joseph Katsioloudes
Colleague at GithubLondon, England, United Kingdom
View →
MZ
Matthew Ziobro
Colleague at GithubChaska, Minnesota, United States
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MX
Melissa X.
Colleague at GithubGreater Boston, United States
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JF
Joseph Franks
Colleague at GithubGreater Minneapolis-St. Paul Area, United States
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SK
Saquib Khan
Colleague at GithubPiscataway, New Jersey, United States
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HN
Huy Nguyen
Colleague at GithubMy Tho, Tien Giang, Vietnam, Viet Nam
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JB
Joshua B.
Colleague at GithubDallas-Fort Worth Metroplex, United States
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AS
Amanda S.
Colleague at GithubKansas City, Missouri, United States
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YY
Yunee Yunjung H.
Colleague at GithubBellevue, Washington, United States
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YB
Yvonne Buckland
Colleague at GithubDhaka, Bangladesh
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Joseph Katsioloudes
Colleague at GithubLondon, England, United Kingdom
View →
MZ
Matthew Ziobro
Colleague at GithubChaska, Minnesota, United States
View →
MX
Melissa X.
Colleague at GithubGreater Boston, United States
View →
JF
Joseph Franks
Colleague at GithubGreater Minneapolis-St. Paul Area, United States
View →
SK
Saquib Khan
Colleague at GithubPiscataway, New Jersey, United States
View →
HN
Huy Nguyen
Colleague at GithubMy Tho, Tien Giang, Vietnam, Viet Nam
View →
JB
Joshua B.
Colleague at GithubDallas-Fort Worth Metroplex, United States
View →
AS
Amanda S.
Colleague at GithubKansas City, Missouri, United States
View →
YY
Yunee Yunjung H.
Colleague at GithubBellevue, Washington, United States
View →
YB
Yvonne Buckland
Colleague at GithubDhaka, Bangladesh
View →
1 education record
Jan Koszewski education
-
Grinnell College
FAQ
Frequently asked questions about Jan Koszewski
Quick answers generated from the profile data available on this page.
What company does Jan Koszewski work for?
Jan Koszewski works for GitHub.
What is Jan Koszewski's role at GitHub?
Jan Koszewski is listed as Senior Software Engineer at Github at GitHub.
What is Jan Koszewski's email address?
AeroLeads has found 1 work email signal at @github.com for Jan Koszewski at GitHub.
What is Jan Koszewski's phone number?
AeroLeads has found 2 phone signal(s) with area code 515, 703 for Jan Koszewski at GitHub.
Where is Jan Koszewski based?
Jan Koszewski is based in Arlington, Virginia, United States while working with GitHub.
What companies has Jan Koszewski worked for?
Jan Koszewski has worked for Github, Stitch Fix, In-Q-Tel, Livingsocial, and Ppc.
Who are Jan Koszewski's colleagues at GitHub?
Jan Koszewski's colleagues at GitHub include Joseph Katsioloudes, Matthew Ziobro, Melissa X., Joseph Franks, and Saquib Khan.
How can I contact Jan Koszewski?
You can use AeroLeads to view verified contact signals for Jan Koszewski at GitHub, including work email, phone, and LinkedIn data when available.
What schools did Jan Koszewski attend?
Jan Koszewski holds Bachelor Of Arts (Ba), Political Science And Government from Grinnell College.
What skills is Jan Koszewski known for?
Jan Koszewski is listed with skills including Rails, Ruby, Ruby On Rails, Objective C, Ios Development, Javascript, Python, and Css.
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