Meteor partnership

JavaScript Software Development Company

We can make
your ideas come true!

Since the beginning of the company, we have successfully completed over 350 Internet projects for small and medium companies, big industries, corporations and governments.

Adam Trojanczyk, CEO

Just call and let's talk
phone.: +48 512 483 112

Do you want to conquer the internet?

Web-based applications,

real-time, PWA, Progressive Web Apps

We have created projects for cities, systems for international corporations, experimental applications for personal development, a virtual trainer, toy builder wizard, and now we are waiting for your project.

Let's work together
Witold Chomiczewski

Witold Chomiczewski

Attorney-in-law and partner at Lubasz and Partners law's office

We have partnered to create something new, up-to-date, visually interesting but also user-friendly. And we did that.


You need to develop a business


identification, UX, UI

Since 2009 we have been constantly looking after our clients' businesses. We will implement modern solutions also in your company. We will solve every problem, we will help increase productivity and minimize costs.

Hire us
Anna Kwaśny

Ann Kwasny

Sales and Marketing Manager OPG Property Professionals

I would like to recommend the Cat In Black company for a professional but friendly approach to the customer. I could always count on their commitment and creativity, they immediately understood the concept and expectations, fulfilled them and added something from their self. In crisis situations, they reacted immediately, solving problems and preventing them in the future.

You want to verify your idea quickly, or you are a startup

Services for startups,

MVP, scaling, validation of ideas

We know technology, and that is why we know which one will be the best for you. This means that we can implement some projects faster than our competition or your internal IT department. Working with us, you can count on honesty, understanding, education, and the necessary support.

Let's start together
Agnieszka Sinska-Glowacka

Agnes Sinska-Glowacka

Deputy Director of the City of Lodz Office

We recommend the company as a worthy and reliable partner. Cooperation was very good for both sides.


Improve your business processes

Optimization of business processes,

consulting, technology

Optimization can be focused on maximizing revenues as well as minimizing costs or speeding up work. Introducing technology to optimize processes will bring you a number of benefits.

Hire us
Tomasz Rzepecki

Tomasz Rzepecki

Digital Marketing Specialist, Dragon-Service

If I had to define cooperation in a few words: professionalism, flexibility, commitment and timeliness. Cooperation with the Cat In Black is an experience that I wish everyone.

When you lack programmers


PSD to HTML, coding

Stability of every business gives a sense of security. It's also important to your customers. That's why in our team you will find only trusted, experienced people who will ensure that the entire implementation goes perfectly.

Trust us
Michał Szczepanek

Michael Szczepanek

Digital Project Manager, Walk

We have worked with Agent John for over two years, including the construction and expansion of the Internet portal. In this Software House work people with full of passion. Always available, always helpful, always on time.

Contact us
in case of your project

Call+48 512 483 112
use the form or write to:

Aleksandra Rylska

Aleksandra Rylska

Fundraising Specialist - Small Feet Fundation

Cat In Black is delivering IT services for us since 2014. We recommend their team for those who will appreciate clarity, concreteness and peace while creating multi-threaded solutions.

Joanna Jagas

Joanna Jagas

BionanoPark Marketing Manager

Cat In Black is distinguished by individual approach to client and unconventional ideas that optimize the functionality of the service.

Awards and prizes

Your project is what is most important for us, but if we win something, it is also nice.

Startup Poland
Startup Poland
Special award from Citibank
Top 5 Startups
European Startup Days
European Startup Days
Qualification for the group of the best startups
Pioneers Festival
Pioneers Festival
Qualification for the group of 50 best startups
Startupy w Pałacu
Startupy w Pałacu
Nomination for the competition
Economic prize of the President of the Republic of Poland
Economic Award
Nomination for the economic prize of the President of the Republic of Poland in the startup category
Strong in Business
Strong in Business
Economic award
Startup Europe Awards
Startup Europe Awards
First place at the Startup Europe Awards in IoT category

That's how we work

Piotr Bucki

Piotr Bucki

Communications trainer, coach, practice, author, lecturer

There are some obvious things in cooperation with agencies, software houses or programmers, on which I pay attention to only when something goes wrong. In case of working with the Cat In Black, I didn't have to worry about deadlines, technology, solutions or quality. However, there are things that are less obvious, such as a good atmosphere of cooperation, a great understanding of the client's needs, and even thinking ahead on his behalf. And that's all I got in one pack. I just felt that my project is really important to them. And that feeling was good.

Tell us about your project
Agent John

Software House Cat In Black

(+48) 512 483 112 Adam Trojanczyk, CEO
Adam Trojanczyk
In the case of ongoing projects:
(+48) 690 561 365 Maciej Sielecki
Maciej Sielecki
Agent John contact box:

Copyright® Cat In Black 2018