6 weeks. 176% more conversions. A component-based build for Callstack that drives growth.

176%

Conversion rate boost

208

Reusable components powering a scalable design system

34 → 90

Website performance score boosted on Lighthouse testing

We need this to be clean and must be very component-driven, because it's simply faster to build that way. For us specifically, it's not the brand, animations, or fancy visuals that sell, it's the content. So it needs to be clean, content must be clear, but it also needs to have that delicate touch.

Aleksandra
Content Lead at Callstack
Industry
Software Development
Service
Web Design
Webflow Development
SEO & AEO
Use Cases

Performance Optimization

Component-based design system

CMS Migration & Organization

SEO Technical Implementation

Duration
6 weeks + ongoing growth
Stage
Scale Up
Company size
150+ employees
Annual revenue
$30M+
Visit website
Let's talk growth

Intro

Callstack approached us with a clear vision: transform their digital presence to represent their position as React Native leaders worldwide. Their website wasn't doing justice to their technical expertise and world-class work with their clients.

They trusted us with a complete website redesign and rebuild, focusing on a content-first approach and performance-driven design.

And the results hit different:

<i ph=trend-up> +176% conversion rate after the redesign

<i ph=traffic-signal> +65.7% organic traffic growth

<i ph=rocket> Performance score: 34 → 90 on Lighthouse

Meet Callstack

When giants like Meta, Amazon, and Evernote need React Native expertise, they call Callstack. Based in Wrocław, Poland, this 150+ team of engineers and designers has been at the forefront of React Native development since 2016.

From performance optimization to brownfield migrations, Callstack has built a reputation for delivering results where others struggle. Their GitHub repositories have thousands of stars, their blog posts become industry references, and their team members are recognized thought leaders in the community.

They're the minds behind essential open-source tools like Re.Pack and Reassure and the go-to consultancy for enterprises tackling their most complex cross-platform challenges. With millions of developers using their libraries and $30M+ in annual revenue, they're not just building apps, they're defining industry standards.

When your website performance is worse than your clients' apps, you have a credibility problem. That's exactly where Callstack found themselves, React Native experts whose own site was holding back.

The challange we tackled

Callstack's website wasn't keeping up with their reputation. While they were building world-class apps for major companies, their own site was holding them back from connecting with new clients who judge technical skills by every interaction. They needed a website that wouldn't just look good, but actually perform.

<i ph=timer> Performance that didn't reflect their expertise

Their site scored 34 on Lighthouse, a missed legitimacy-building opportunity for a company that optimizes apps reaching millions of users. The 78% bounce rate meant potential clients weren't staying long enough to discover their capabilities, while a 2.1% conversion rate showed significant potential for generating qualified leads.

<i ph=binoculars> Limited search visibility

Only 1 in 5 of their target keywords appeared in Google's top 10 results. Potential clients searching for React Native experts weren't finding them easily.

<i ph=cards-three> Outdated tech stack

Built with jQuery, heavy assets, and poor optimization that didn't reflect their cutting-edge expertise and the efficient work they do for clients.

<i ph=swap> Unstructured content

Their CMS needed better organization. The team already generated great content, but their setup made it hard to organize and update. The marketing team spent too much time fighting with the website instead of creating more valuable content.

<i ph=calendar-dots> Tight deadline

They needed a strategic roadmap to production within 2-3 weeks max because important business opportunities were coming up, and they couldn't wait months for a traditional redesign. This required a phased approach - some parts custom-built, others leveraging proven Relume components to go live quickly.

<i ph=circuitry> Previous technical debt

As mentioned by the team, "our previous site is just broken". Messy CMS, poor structure, and maintenance nightmares that they didn't want to repeat. It was time to start fresh with something that worked from the get-go.

#callstack-requirements-aleksandra
#callstack-expert-jakub

If you want your product to stand out, attract more users, work with a team that deeply understands both product and marketing, Grafit is your choice.

Matej Novak
CEO at Nova Insurer

Such amazing design! incredible work, really appreciate your help on the project

Kevin Niparko
VP of Product at Twilio

"CMS-first" approach streamlined both design and implementation phases, ensuring seamless content migration and optimal user experience across all touchpoints.

Marcin Warno
Co-founder & CTO at Grafit

Quarterhill had cutting-edge transportation technology, but their digital presence felt outdated. We created a sleek, modern design and simplified the navigation so users could seemlessly find what they needed across the pages.

Błażej Krzepina
Design Lead at GRAFIT

We needed to transform our complex digital ecosystem into something that truly represents our technological leadership in transportation infrastructure.

Donna Bergan
VP of Marketing at Quarterhill

Grafit was our superpower when merging three websites into one, positioning us as a market leader and tech innovator. Their designs accomplished exactly that. We love our new look

Donna Bergan
VP of Marketing at Quarterhill

Jace had incredible tech but looked like a beta product. We had 4 weeks to flip that perception completely. The game-changer was nailing those product animations - users had to 'get it' in 3 seconds or they'd bounce.

Jakub Startek
Founder & CEO at GRAFIT

Working with Grafit feels like having an exceptional design team that’s part of our company. They understand our metrics, they move at our speed, and they consistently deliver quality that reflect our product and vision. When you’re growing fast, this kind of partnership is invaluable.

Fryderyk Wiatrowski
Co-founder & CEO at Jace.ai

I loved the fact that Jace had such good analytics and insights about their product. This gave us great input on how to present the product to users based on actual data rather than assumptions. When clients come with real user feedback and conversion data, we can create solutions that directly address pain points.

Greg Musiał
Web Designer at Grafit

We had an amazing product, but our website was confusing potential customers instead of converting them. We needed someone who could translate our technical capabilities into clear value propositions that business users would immediately understand and trust.

Fryderyk Wiatrowski
Co-founder & CEO at Jace.ai

Gentrace had breakthrough AI observability technology but needed a brand that could communicate that innovation. We created a clean, technical aesthetic with messaging that speaks to developers while establishing enterprise credibility.

Błażej Krzepina
Design Lead at GRAFIT

Gentrace had breakthrough AI observability technology but needed a brand that could communicate that innovation. We created a clean, technical aesthetic with messaging that speaks to developers while establishing enterprise credibility.

Błażej Krzepina
Design Lead at GRAFIT

We needed a brand and website that could match the sophistication of our technology while helping us stand out in a crowded AI tools landscape.

Peggy Rayzis
Marketing Lead at Gentrace

"Working with Grafit was exactly what we needed. They delivered on every promise - our performance scores went through the roof, traffic surged immediately, and we finally have a system that scales with our team. I'd recommend them to any tech company that wants to move fast without compromising on quality."

Mike Grabowski
Founder & CTO at Callstack

“Working with Callstack was incredibly efficient. They knew exactly what they wanted and communicated it clearly from the start. Their team stayed involved and gave us quick feedback, so we could work efficiently and get things done instead of going back and forth with changes.”

Marcin Warno
Co-founder & CTO at Grafit

The Callstack team understood the project objectives and role of Grafit and Callstack team from the beginning. The challenge was going from concept to live in 6 weeks, but their clear vision and direct feedback loop allowed us to move fast and focus on what matters: execution

Jakub Startek
Co- founder & CEO at GRAFIT

We need this to be clean and must be very component-driven, because it's simply faster to build that way. For us specifically, it's not the brand, animations, or fancy visuals that sell, it's the content. So it needs to be clean, content must be clear, but it also needs to have that delicate touch.

Aleksandra
Content Lead at Callstack

The team's approach to validating Tutlo Club was extraordinary, perfectly capturing our vision of a flexible, community-driven learning platform. The results speak for themselves – 100 sign-ups in the first week and rapid growth to over 4,000 members!

Mateusz Łozowicki
Head of New Venture, Tutlo

Dream team! Thanks for all the support helping us hit our incredibly ambitious timeline and vision for the launch.

Peggy Rayzis
Marketing Lead at Gentrace

The team's expertise transformed our vision into a compelling product in record time. Their work was instrumental in securing our strategic partnership.

Jakub Sek
Founder, SuppMatch

We faced a tough challenge, but the team's deep understanding of product building transformed our vision into reality, pushing us ahead in the market.

Konrad Szczygieł
Co-founder & COO at Playmore

Grafit created a fantastic website for us under a tight timeline. Highly recommend working with them!

Jacob Simon
Founder & CEO at Adapt API

GRAFIT was a fantastic team to work with throughout the project. Their consistent communication kept us informed every step of the way, and their quick response to challenges made all the difference.

Michał Zalewski
Founder at Mafelo

The team's approach to our rebrand and product refinement has been transformative. The new CodeJet not only looks better but also communicates our value proposition more effectively. The results speak for themselves – we're seeing unprecedented growth in both traffic and conversions.

Patryk Pijanowski
CEO, CodeJet

Working with Grafit Agency has been an exceptional experience. They quickly understood what we needed and delivered everything on time. The end product not only met but went beyond what we hoped for. You can always trust Grafit for prompt and top-notch work.

Artur Górniak
CEO, CXLABS

The turnaround time was excellent, the communication was excellent, and the Grafit team were genuine experts in their fields. We achieved an incredibly powerful and professional website for a fraction of the typical time and cost.

Alex Atkins
VP of Marketing & Growth at Sturdy

I love how the team managed the end-to-end process. The landing page perfectly describes what the product is about. The client understood it well, and we signed the deal.

Artur Gorniak
Founder, AuditNOW

Grafit Agency transformed our vision into a mind-blowing digital experience – they've set a new bar for what a crypto platform can be!

Moby Albalawi
Head of Design at Bielik

The product launch went super fast and smooth within 4 weeks. I'm happy for another successful project for our holding. The team's comprehensive approach to branding and app design was crucial in getting Bloosh off the ground so quickly and effectively.

Antoni Redziniak
CEO Grailz

The landing page perfectly captured our product's essence and has been instrumental in our sales process. Closing 15 deals in the first month exceeded our expectations - it's been a game-changer for our product launch."

Szymon Zagroba
Senior Marketing Specialist, AI REV

How we made it happen

week 1

Strategy & discovery

We dove deep. Content audits, competitive analysis, UX workshops with their team. No assumptions—just data-driven insights about what their audience needed.

Week 2-3

Designing for performance

We created wireframes first, then built a beautiful interface using our component-based system. Relume helped us move fast while Figma prototypes kept everyone aligned through the process. Every design choice was deliberate, supporting their content-first strategy.

Week 4-5

Development magic

This is where things got interesting. We built 208 reusable components in Webflow, organized 1,256 CMS items across 22 collections, and implemented performance optimizations that would impress any search engine.

Week 6

Launch & optimize

We tested everything thoroughly, optimized performance, and trained their team. We didn't just deliver an awesome website, we made sure it worked flawlessly from day one and was ready for further scaling.

Strategy & Planing
Ongoing
ui & ux design
Ongoing
Design system
Ongoing
Development
Ongoing
growth & CRO
Ongoing

Tools we use

The tech stack that powers marketing independence

The right stack removes bottlenecks and gives your team the freedom they need to move fast.

Webflow

The best website builder
on the market

Figma

Collaborative tool for designing & prototyping UI/UX

Relume

Tool to create AI-powered sitemaps, wireframes & style guides

GSAP

JS library for high-performance animations & interactions

Optibase

Website analytics & A/B testing platform

Finsweet Components

Library of advanced Webflow components
#callstack-expert-marcin

The results

Six weeks after launch, the numbers told a story of complete transformation. Every metric improved, from technical performance to business outcomes:

Performance you can measure

We designed the experience first, then engineered it for maximum speed and searchability.

34 → 90

164%Speed score improved, leading to a better experience for visitors and higher SEO rankings.

4.2 → 1.1s

Load Time: Turning Slow into Fast

Traffic & engagement on fire

Strategic user flows plus intuitive design that guides visitors exactly where they need to go.

65.7%

Organic traffic increase

176%

Conversion rate boost

Technical excellence that scales

We built a system that manages large amounts of content while keeping everything running quickly.

1,306

Organized items grouped into 23 collections, all carefully planned and created

208

Reusable components powering a scalable design system

Within days of launch, we saw organic traffic surge while performance metrics hit industry-leading standards. The new component-based architecture didn't just look good, — it empowered Callstack's marketing team to move faster while maintaining perfect brand consistency.

Summary

This wasn't just a website redesign – it was a complete digital transformation. When you treat your website as a business asset rather than just a digital brochure, magic happens. We created a platform that doesn't just represent Callstack's technical expertise, it amplifies it.

The results speak for themselves: 164% performance improvement, 65% traffic surge, 176% conversion increase. Most importantly, Callstack now has a digital presence that matches their world-class reputation and a flexible foundation that grows with their business - giving their team the tools to create, update, and expand without bottlenecks.

We need this to be clean and must be very component-driven, because it's simply faster to build that way. For us specifically, it's not the brand, animations, or fancy visuals that sell, it's the content. So it needs to be clean, content must be clear, but it also needs to have that delicate touch.

Aleksandra
Content Lead at Callstack

Ready to transform your digital presence?

Let’s chat about how strategic web design can accelerate your growth.

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