Software Engineer
Current
Jul 2024 - Present
AeroLeads people directory · profile
Oskar Kaczmarzyk Email & Phone Number
React Universe Developer
at
Callstack
LinkedIn matched
✓ Verified May 2026
2 data sources
Profile completeness 71%
Current company
Role
React Universe Developer
Location
Wrocław, Dolnośląskie, Poland
Company size
Who is Oskar Kaczmarzyk? Overview
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Quick answer
Oskar Kaczmarzyk is listed as React Universe Developer at Callstack, a company with 43 employees, based in Wrocław, Dolnośląskie, Poland. AeroLeads shows a matched LinkedIn profile for Oskar Kaczmarzyk.
Oskar Kaczmarzyk previously worked as Software Engineer at Callstack and Frontend Developer at Apptension.
Company email context
Email format at Callstack
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Callstack
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Profile bio
About Oskar Kaczmarzyk
Oskar Kaczmarzyk is a React Universe Developer at Callstack. Colleagues describe them as "It's rare to come across someone as motivated and enthusiastic as Oskar. He consistently went above and beyond to ensure that our team met its targets. His positive attitude and strong work ethic were contagious, and he always brought solid and clean code to the table. I highly recommend Oskar!" and "I was working with Oskar in one project for about one year. He is a great react native developer, team player and really open minded person. His work is always of a high standard, he knows how to approach problems from the technical but also non-technical side. "
Current workplace
Oskar Kaczmarzyk's current company
Company context helps verify the profile and gives searchers a useful next step.
Callstack
4 roles
Oskar Kaczmarzyk work experience
A career timeline built from the work history available for this profile.
Frontend Developer
Nov 2022 - Feb 2024
Software Developer
Feb 2021 - Aug 2022
Software Developer
Chomchom
Jan 2020 - Feb 2021
Team & coworkers
Colleagues at Callstack
Other employees you can reach at callstack.io. View company contacts for 43 employees →
ML
Marta Lewicka
Colleague at Callstack
Wrocław, Dolnośląskie, Poland, Poland
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DD
Dominik Dolny
Colleague at Callstack
Dolnośląskie, Poland, Poland
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PC
Paulina Chmielewska
Colleague at Callstack
Wroclaw Metropolitan Area, Poland
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KL
Kacper Lorenz
Colleague at Callstack
Wrocław, Dolnośląskie, Poland, Poland
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KT
Kien Tran
Colleague at Callstack
Wrocław, Dolnośląskie, Poland, Poland
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MS
Martyna Staszewska
Colleague at Callstack
Poznań, Wielkopolskie, Poland, Poland
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MB
Maciej Budziński
Colleague at Callstack
Olsztyński, Warmińsko-mazurskie, Poland, Poland
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MG
Marta G.
Colleague at Callstack
Poland, Poland
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DZ
Dariusz Zając
Colleague at Callstack
Rzeszów, Podkarpackie, Poland, Poland
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KK
Kamil Kędzierski
Colleague at Callstack
Poznan, Wielkopolskie, Poland, Poland
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Marta Lewicka
Colleague at Callstack
Wrocław, Dolnośląskie, Poland, Poland
View →
DD
Dominik Dolny
Colleague at Callstack
Dolnośląskie, Poland, Poland
View →
PC
Paulina Chmielewska
Colleague at Callstack
Wroclaw Metropolitan Area, Poland
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KL
Kacper Lorenz
Colleague at Callstack
Wrocław, Dolnośląskie, Poland, Poland
View →
KT
Kien Tran
Colleague at Callstack
Wrocław, Dolnośląskie, Poland, Poland
View →
MS
Martyna Staszewska
Colleague at Callstack
Poznań, Wielkopolskie, Poland, Poland
View →
MB
Maciej Budziński
Colleague at Callstack
Olsztyński, Warmińsko-mazurskie, Poland, Poland
View →
MG
Marta G.
Colleague at Callstack
Poland, Poland
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DZ
Dariusz Zając
Colleague at Callstack
Rzeszów, Podkarpackie, Poland, Poland
View →
KK
Kamil Kędzierski
Colleague at Callstack
Poznan, Wielkopolskie, Poland, Poland
View →
FAQ
Frequently asked questions about Oskar Kaczmarzyk
Quick answers generated from the profile data available on this page.
What company does Oskar Kaczmarzyk work for?
Oskar Kaczmarzyk works for Callstack.
What is Oskar Kaczmarzyk's role at Callstack?
Oskar Kaczmarzyk is listed as React Universe Developer at Callstack.
Where is Oskar Kaczmarzyk based?
Oskar Kaczmarzyk is based in Wrocław, Dolnośląskie, Poland while working with Callstack.
What companies has Oskar Kaczmarzyk worked for?
Oskar Kaczmarzyk has worked for Callstack, Apptension, Enpli, and Chomchom.
Who are Oskar Kaczmarzyk's colleagues at Callstack?
Oskar Kaczmarzyk's colleagues at Callstack include Marta Lewicka, Dominik Dolny, Paulina Chmielewska, Kacper Lorenz, and Kien Tran.
How can I contact Oskar Kaczmarzyk?
You can use AeroLeads to view verified contact signals for Oskar Kaczmarzyk at Callstack, including work email, phone, and LinkedIn data when available.
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