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Aleksandra Desmurs-Linczewska

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What I love most about Callstack is the constant opportunity to grow.

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If you're focused on development, Callstack will support and challenge you.

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Finance & Administration Manager @ Callstack

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The React and React Native ecosystems thrive thanks to a vibrant, global community of developers sharing knowledge and contributing to the Open Source. Discover how to participate in community initiatives, contribute to core projects, and learn from other developers' experiences in building cross-platform applications.

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Events We Hold for You - Culture Powered by Callstack

When working at Callstack, you can join our unique initiatives. Find out more about our conferences, meetups, hackathons & discussion panels. Join our team!

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How You Can Develop as a Callstack Developer

We advocate knowledge sharing and self-development - we encourage our developers to contribute to Open Source and realize their ideas in R&D. Join us!

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Q&A Sessions From React Native EU 2020

What are the plans for the development of React Native and what is the future direction of the framework? Read the article and find out!

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React Native EU 2020 Virtual Edition - Summary

The 4th edition of our conference, React Native EU 2020 is now history. Now that the dust after the conference has settled, let’s sum up the event!

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How Did We Conduct a Fully Remote Hackathon?

Find out what do you need to remember when you organize a hackathon, and what challenges you need to face when you do it remotely.

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Callstack + Hacktoberfest = Awesomeness

With every October comes Hacktoberfest season! At Callstack we love to run hackathons at this time. Find out more!

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Introducing React Native OSS Board

To make it easier for beginners, we created a board with “ready to pick up” issues from react-native and react-native-community repositories.

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Callstack + Open Source = 💙

At Callstack we place a high value on Open Source - we help maintain community repositories, contribute to the React Native ecosystem, and many more!

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The Team Growth Done Right

Callstack is an ever-growing team of React and React Native experts. Find out more about the team!

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A Successful Cooperation With a Client Doesn't End at Software Development

Callstack is focused on cross-platform development with React Native as a primary technology. Check examples of tools we created for our clients in Open Source.

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Are You Ready? React Native EU 2017 is coming!

It’s less than a week to React Native EU first edition. Get ready for an amazing conference experience in Wrocław, Poland.

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React Native Hackathon 2016

We hosted the very first hackathon at Callstack! Whether you missed it or want to relive the highlights, our recap has you covered.

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2×Estimated AI-assisted delivery speedupJetBrains
25Working days from kickoff to mergeJetBrains
1Plugin across three frameworksJetBrains
10min from code change to mini-app releaseTeamworks
multi-dailystaging deployments instead of weekly releasesTeamworks
7mini-apps supported in one modular mobile platformTeamworks
2CI/CD lanes for mini-app and host-app distributionTeamworks
2xgrowth in mobile user base during the migration periodAutoZone
4.2 -> 4.7app rating increase after migrating to React NativeAutoZone
0missed releases during the transition to React NativeAutoZone
33%fewer re-renders across most featuresQuestrade
18%faster time-to-interactiveQuestrade
-28%CPU usage in critical trading flowsQuestrade
78%bundle size reduction (from 50 MB to 11 MB)Dream11
30%faster component mount time after render optimizationDream11
60%faster initial load time enabled by switching to HermesDream11
5xfaster message sending timeExpensify
4.5xfaster search screen loading timeExpensify
#1SEO rank, recovering from 3-9AutoZone
260kBless in blocking JS payloadAutoZone
2–5xfaster feedback loopAutoZone
2.8xincrease in knowledge over 8 weeks (25% → 71% assessment scores)Hello Fresh
15developers trained across web and native backgroundsHello Fresh
86%of devs self-rated their knowledge as 3/5 or higher after training (up from 0%)Hello Fresh
130%increase in users post-upgrade7cups
63%adoption rate; majority of attendees registered in the appReact Universe App
67%of attendees connected through QR badge sharingReact Universe App
45%created personalized badges to showcase identity and goalsReact Universe App
49%of attendees onboarded before day one, arriving ready to networkReact Universe App

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