Product and Process Optimization

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challenges
Facing These Challenges?

Intuition-driven Development

Lack of a data-driven framework leads to fragmentation and long-term performance bottlenecks.

Unstable Deployments

Poorly defined verification and testing disrupts system reliability, making it difficult to scale effectively.

Delayed Releases

Recurring delays escalate costs, risking compliance, and slowing down time-to-market.

Poor Dev Experience

Outdated tools and workflows slow down development, causing team inefficiency.
Why us?
Led By Collaboration

We’re Callstack - co-creators of React Native and a Meta’s partner. By actively helping build the technology, we ensure you’re working with the experts who shape the React Universe.
Here, we don’t just build apps - we turn your ideas into reality.  We streamline development, ensuring your teams are aligned, your fixes are long-term, and your user experience is seamless - from concept to launch.

Data-Driven Solutions
We gather data, metrics, and measurable evidence and set up the decision-making process to rely on statistical analysis and factual information to drive the product's growth.
Effective & Safe Releases
We help you build robust testing processes and production failure safety nets, to ensure the user experience remains undisrupted when shipping new releases.
Future-Proof Code
We help you tackle technical debt by keeping your codebase clean, scalable, and ready for what’s next - so you can grow without hitting performance roadblocks.
Services
Let your app be fast and your users (not) furious.

Technical Debt Reduction

Diagnosing and fixing technical debt for enhanced performance and stability

Development Efficiency Boost

Remove the technology and process obstacles that stop your team from working efficiently

App Performance Optimization

A holistic approach to optimizing app performance: diagnostics, fixes, and future proofing

React Compiler Guided Implementation

Speed up your app with our guided implementation of Meta’s React Compiler. See performance boosts up to 2.5x

run your business on REACT UNIVERSE

React Universe combines front and back-end development with cross-platform capabilities using a single programming model to make faster, better apps.

Tech Stack Upgrade

Tech Stack Upgrade

Use up-to-date technologies to unlock new levels of performance, scalability, and efficiency

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What we can do for your business

We know how to futureproof your app for a rapidly changing business landscape. Our in-depth technology expertise ensures your business is ready for whatever lies ahead.

We can help you to:

Update dependencies

Support the latest OS versions and app store requirements

Upgrade a monolithic codebase

Ensure a unified experience across multiple devices

Expand to new platforms

Use a single codebase for different platforms

Utilize code-sharing opportunities

products

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Architecture Redesign

Change the way you approach your application’s technology, tools, processes, and structures

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Service

Adoption of a Cross-Platform Approach

Get your product to work on multiple platforms quickly and easily

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Migration to the React Universe

Move from a fragmented stack of multiple technologies to a unified, React-powered ecosystem

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POWERED BY

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.

Deep dive into React Universe

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Trusted by

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

Nader Dabit

DevRel + XD at EigenLayer / EigenDA

at Amazon Web Services

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