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Outdated tools and workflows slow down development, causing team inefficiency.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.

Product Development and Growth

Product Development and Growth

We help companies of all sizes develop innovative products that let them stay on top of the game

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What we can do for your business

From app architecture and development to maintenance, and beyond, we develop digital products that delight customers and deliver groundbreaking business performance.

We can help you to:

Design your app architecture

Execute mobile app development

Execute web app development

Seamlessly add new features

Improve app performance

Take care of app maintenance

products

Service

Product Architecture

We help companies of all sizes develop innovative products that let them stay on top of the game

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Service

Mobile App Development

Develop and scale your mobile product to every platform

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Service

Web App Development

Develop and scale your web product to every platform

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Service

Integration of New Features into Existing Apps

Easily update your application with new features, regardless of the technology used

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Service

Integration Support for Wearables, TV, Consoles

Add support for missing platforms, devices, or experiences

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App Maintenance

Support and maintain your app after its release

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App Testing and Quality Assurance

Test and improve the quality of your app before (or after) it’s released

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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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