
BUILD



We create game-changing apps that transform your business from the inside out.
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REACT UNIVERSE

Instead of splitting development across multiple languages, platforms, and teams, React Universe combines front and back-end development with cross-platform capabilities using a single programming model.
Services
We create game-changing apps that transform your business from the inside out.


Product Development and Growth



Optimization of Products and Processes



Tech Stack Upgrade



Team Upskilling



Business Transformation

Case studies
testimonials

“The team at Callstack are the most experienced and trusted engineers in the React Native community and ecosystem.”

“Callstack made the perfect staff augmentation partner. Their engineers proved to be a crucial part of our mobile app relaunch project.”

“I appreciate their attention to detail, flexible approach and a high degree of expertise. I definitely recommend the Callstack team!”

“The collaboration was great throughout, with Callstack engineers seamlessly working as part of our agile teams.”

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