Product and Process Optimization

Boost your app’s performance end-to-end.

Estimate project

Challenges

Unstable Deployments? Delayed Releases?

Why us

Led By Collaboration

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Outdated tools and workflows slow down development, causing team inefficiency.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

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Development Efficiency Boost

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

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App Performance Optimization

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

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React Compiler Guided Implementation

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

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Cross-Platform Power

Scale your product with a flexible, feature-driven design and a team that knows the ropes. Native experience on every platform means your users feel at home, no matter how global you go.

Future-Proof Approach

Stay miles ahead with cutting-edge tech, flawless performance, and the scalability to grow as your business does. We future-proof your app so you're always prepared for what’s next.

Faster Time-To-Market

Launch faster, smarter, and without compromise. We equip your team with the insights and skills to deliver now and thrive in the long run.

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.

Learn more

Technology we use to deliver full stack apps

Bun

React DOM

React Native

Remix

Node.js

Next.js

your story is next

Let’s get in touch

“Callstack played an essential role in helping us release our mobile app to the market. They helped us set up and optimise our mobile ecosystem.”

Donovan Isherwood - Engineering Manager

Thriva

Refreshing WorkflowGen App by Advantys

Super Apps Training

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What we can do for your business

We will diagnose performance issues and develop solutions that establish new standards for your product and operations.

We can help you to:

Improve your developer experience

Develop your app more efficiently

Find the root cause of performance issues

Avoid technical debt

Improve projects setup

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products

Service

Technical Debt Reduction and Prevention

Diagnosing and fixing technical debt

Service

App Performance Optimization

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

Service

Development Efficiency Boost

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

Service

React Compiler Guided Implementation

Guided implementation, easier by default.

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