UX/UI design studio – nextgen design | Digital products with real value

what yougainwith us

effective design

We create intuitive and visually appealing interfaces – based on verified data and aligned with real business goals

useful AI

We help you apply AI where it truly adds value – helping you stay ahead of the competition

agile collaboration

We adapt to your way of working – whether you're a startup, a software house or a large organisation

expert support

We’ve designed and developed products
used daily by over 8 million people

boutique team

We’re flexible, hands-on and autonomous – combining strategy, UX and content into seamless experiences

...plus our passion, positive energy and good humour always included :)

latest projects

Generator Pomysłów

Generator GPT – revamp and prep for commercialisation

A tool for building AI agents, automating processes, and team collaboration on text and visuals using AI within project groups

IBERION

Biznes Info – new homepage for a new editorial strategy

A business portal transformed into an expert-driven source of information for entrepreneurs and professionals

colin rose institute

Speed English – language-learning app based on the Colin Rose method

A personalised learning app combining Colin Rose’s method with dominant intelligences and weekly study cycles

let's meet

What excites us most about design
is focusing on real people and their needs.
What drives us is teamwork.
And we kinda like each other. Kinda :)

Hi, we're Daniel Aniszewski and Kasia Sitkowska :)

We created nextgen design, because we believe every business deserves excellent user experiences and collaboration based on partnership, commitment and passion.

We want to bring fresh perspectives and create solutions that truly elevate the digital world.

learn more about us

what they say about us

It’s rare to meet experts whose skills go far beyond the expected. Kasia and Daniel from nextgen design approach every challenge – even "just UI" – with care, precision and full use of their knowledge and experience, delivering analysis, conclusions, recommendations and thoroughly developed UX/UI design. We fully recommend them – professionals with outstanding expertise and remarkable results.

Marcin Ignaczak

Co-founder Folx.

I had the pleasure of working with Daniel for many years on the design of Wirtualna Polska’s entire product portfolio. It was a time of trend-setting and innovation in digital media. Daniel is a wellspring of great ideas – meticulous, brave in challenging conventions, and always timely. His communication skills are top-notch, making teamwork smooth and client relations effective.

Adam Plona

Co-founder Mindgram
ex-VP Product Development, Wirtualna Polska

Working with Daniel and Kasia was one of the key factors behind the success of our projects at Wirtualna Polska. Their deep understanding of design and UX, combined with the ability to translate complex ideas into practical solutions, made our products both beautiful and highly functional.

Jacek Winiarski

Senior Product Manager, Tidio
ex-Head of Growth, Wirtualna Polska

I’ve had the pleasure of working with both Kasia and Daniel. They’re top-level professionals, detail-oriented and focused on delivering the best digital products. Together we launched several new websites and transformed existing ones, significantly improving UX and revenue. Their passion and expertise make them invaluable partners.

Marcin Kozera

Head of Product, Going.

Kasia and Daniel worked with me on projects in advertising, media products and multimedia tools like apps and video players. They have a unique talent for aligning competing stakeholder interests. I appreciated their user-first mindset – the final results were always top-notch. This duo is always reliable.

Paweł Kopacki

Group Head of Operations, Research and Product, Allegro

When you work with Kasia and Daniel, it’s clear that users come first. You see it not just in the design, but in the process – open, empathetic, and focused. Combine that with experience and analytical thinking, and you know you’ll reach your goals.

Michał Zieliński

Product Manager, Classic Driver

I highly recommend Daniel and Kasia – true experts in product design. Their experience and intuition were key in market research, competitor analysis and testing, resulting in intuitive and engaging interfaces. They strike a perfect balance between form and function. It’s a guarantee of top quality and inspiring collaboration.

Jarek Żulpo

Head of Delivery & Product Operations, Benefit Systems SA

Working with Kasia and Daniel, I often thought: “Damn, they’re right.” They really grasp the complexity of business – and pull an ace from their sleeve when it counts. Their approach is solid, and their feedback is always spot-on.

Krzysztof Balewski

Business Owner, Wirtualna Polska

designing the future
of digital

experiences

interfaces

products

interactions

experiences

what we can dofor you

UX/UI
projects

workshops
& audits

what yougainwith us

effective design

useful AI

agile collaboration

expert support

boutique team

what wedesign

latest projects

Generator Pomysłów

Generator GPT – revamp and prep for commercialisation

IBERION

Biznes Info – new homepage for a new editorial strategy

colin rose institute

Speed English – language-learning app based on the Colin Rose method

let's meet

what they say about us

Working with Daniel and Kasia was one of the key factors behind the success of our projects at Wirtualna Polska. Their deep understanding of design and UX, combined with the ability to translate complex ideas into practical solutions, made our products both beautiful and highly functional.

When you work with Kasia and Daniel, it’s clear that users come first. You see it not just in the design, but in the process – open, empathetic, and focused. Combine that with experience and analytical thinking, and you know you’ll reach your goals.

Working with Kasia and Daniel, I often thought: “Damn, they’re right.” They really grasp the complexity of business – and pull an ace from their sleeve when it counts. Their approach is solid, and their feedback is always spot-on.

let’s create something
exceptional together

designing the futureof digital

experiences

interfaces

products

interactions

experiences

what we can dofor you

UX/UIprojects

workshops& audits

what yougainwith us

effective design

useful AI

agile collaboration

expert support

boutique team

what wedesign

latest projects

Generator Pomysłów

Generator GPT – revamp and prep for commercialisation

IBERION

Biznes Info – new homepage for a new editorial strategy

colin rose institute

Speed English – language-learning app based on the Colin Rose method

let's meet

what they say about us

Working with Daniel and Kasia was one of the key factors behind the success of our projects at Wirtualna Polska. Their deep understanding of design and UX, combined with the ability to translate complex ideas into practical solutions, made our products both beautiful and highly functional.

When you work with Kasia and Daniel, it’s clear that users come first. You see it not just in the design, but in the process – open, empathetic, and focused. Combine that with experience and analytical thinking, and you know you’ll reach your goals.

Working with Kasia and Daniel, I often thought: “Damn, they’re right.” They really grasp the complexity of business – and pull an ace from their sleeve when it counts. Their approach is solid, and their feedback is always spot-on.

let’s create something exceptional together

designing the future
of digital

UX/UI
projects

workshops
& audits

let’s create something
exceptional together