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Callstack

Callstack

Hi, we are Callstack! A Total Software Engineering Consultancy specializing in building cross-platform full-stack apps set in React Universe for global enterprises and fast-growing startups. Do not hesitate to join us!

Software Houseconsulting101-500Wrocław

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Michał Pierzchała

Principal Engineer in Technology

Mike is the brain behind Callstack's innovation, leading our Open Source and Research & Development department. He's all about pushing the boundaries in app development, creating excellent tools for JS devs and Core Jest & RN Community contributor.

Monika Stotko

Finance & Administration Manager

Monika started working with us almost 4 years ago as an Office Manager. Since then, she has broadened her expertise as an Admin and Finance Specialist. Right now, she leads the finance team and has become our spreadsheet and budgeting hero.

Barbara Markiewicz

Community & Events Manager

Basia joined Callstack in 2019, initially as a one-woman army in Marketing. Since then, she has delved into all marketing fields and become the brain behind building an outstanding community and organizing international conferences like React Conf.

Poznaj nas bliżej

How it all started and how is it going?

Callstack was founded in 2016 by Mike Grabowski and Anna Lankauf as a React Native app development startup. In the last eight years, we have grown to almost 200 of the best in their proficiency, and we are still looking to expand our teams with new talents and fields of expertise. We offer not only a workplace but also a nurturing environment where you can thrive, grow, and develop professionally in the long run.

Us, the team!

We are a modern company with a remote-first approach, putting emphasis on workplace relationships. We believe that people are at the heart of our success, and we collaborate and complement each other's strengths across all our departments. Whether you work in sales, admin & finances, marketing, or people & culture - we will accomplish it together!

Areas of Expertise

We’re a Total Software Engineering Consultancy, so our expertise goes way beyond just building apps. Folks from Sales help us grow and benefit from our hard work. Admin & Finance department keeps our budget in shape, ensures stable growth, and cares about cybersecurity. Marketing shows the world who we are and what we’re capable of, generating leads and speaking to stakeholders. Last but not least, People & Culture takes care of our well-being, fosters good relationships, and picks new talents to help us become even more successful.

Who do we work with?

We do not fudge around! At Callstack, we work with top-tech companies from the Fortune 500 and Silicon Valley, like Meta, Microsoft, and AutoZone, meeting them regularly in the US. We also work with fast-growing startups and small and medium-sized enterprises, like Evernote and Coinmine, providing them with expert support. Joining us, you will be close to the newest technologies and the best, inspiring experts worldwide.

React Universe Conf!

Since 2017, Callstack has organized the biggest React Native-related conference on our planet! Formerly known as React Native EU, it has evolved into React Universe Conf, for better alignment with our current focus on all things React and React Native. It is a unique place for developers to share their expertise and learn from the top industry talents. By joining us, you can become the co-creator of next year’s event and a part of this amazing community.

Podcast & Blog

Besides being into coding, we also care about the community around it. Whether you're into podcasts or writing, we've got options for you. Our recording studio is ready for podcasting enthusiasts, and our blog welcomes anyone with unique ideas, not just about writing code. We’re here to support you in building a personal brand with advice and the right tools.