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Outdated tools and workflows slow down development, causing team inefficiency.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

Team Upskilling

Team Upskilling

We can equip your developers with the latest knowledge and tools

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What we can do for your team

Your team is the hero behind the product, but even the best need a helping hand. We can share our expertise, join your team, or develop learning processes that help your developers tackle the most complex challenges.

We can help you to:

Upskill your team

Improve quality and development speed

Adapt to a new tech stack

Help your team make better strategic decisions

Get access to expert knowledge

Assure proper knowledge transfer after project hand-off

products

Service

Rapid Team Expansion

Boost your delivery capabilities with our expert engineers

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Developer Training

Upskilling your delivery team with everything they should know around the React Universe

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Mentoring Program

Empowering developers in a perfectly personal way

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Consulting

When you see the symptoms, but can’t find the root cause

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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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