Our Team

Meet our team of professionals

  • Frederico photo

    Frederico Knabben


    Coming from Brazil, Frederico moved his focus to web development in his new Italian life. Working on a CMS and not satisfied with the available editing solutions, he created the predecessor of CKEditor, FCKeditor. That was the birth of today's CKSource.

    Frederico holds a Bachelor’s degree in Marketing and Advertising and more than 15 years experience in the IT market as a developer and business man.

    Enjoy the magic you have in your hands

  • Wiktor photo

    Wiktor Walc


    Living in Warsaw (Poland), Wiktor enjoys working with a team of professionals. His main interest is web application security, he's also a PHP enthusiast.

    Wiktor holds a Bachelor’s degree in Computing Science from the University of Gdansk and over 10 years experience in software development.

    Make it as simple as possible, but not simpler

  • Piotr photo

    Piotr Koszulinski

    Lead JavaScript Developer

    Piotrek joined CKSource in 2012, just after obtaining Bachelor's degree in Computer Science at Wroclaw University of Technology.

    Since 2008 JavaScript is Piotrek's main interest and topic of many thorough articles on his blog. He deeply believes that there's a future for JavaScript - on both front and back ends. By joining CKEditor's team Piotrek gained a great opportunity to discover the world of large JavaScript projects.

    JavaScript is to Java as Hamster is to Ham

  • Aleksander photo

    Aleksander Nowodzinski

    JavaScript Developer

    JavaScript Developer, UX enthusiast and OSS advocate. Graduated in Computer Science. Joined CKSource in 2012. Focused on smart user interfaces and text editing solutions.

    Living in Wroclaw, Poland. Progressive rock fan, bass player and wannabe photographer.

    But it works on my machine!

  • Kuba photo

    Jakub Swiderski

    QA / Developer

    Kuba lives in Kraków, Poland. He obtained his master's degree in 2009.

    Kuba has three years of experience as a Java and JavaScript developer. He loves working and experimenting with "Java" languages, especially when surrounded by a group of professionals who share the same enthusiasm.

    I undertake and I achieve

  • Robert photo

    Robert Mikolajuk

    PHP Developer

    Living in Biala Podlaska (Poland), Robert enjoys playing with new web technologies as much as riding his motorcycle. Working on web application tries to see the big picture.

    Robert holds a Bachelor's degree in Computing Science, Bachelor's degree in Management and Marketing, MSc in E-business and postgraduate diploma in Linux Administration. Professionally involved in web developing since 2007.

    It's in our hands... It always was...

  • Piotr photo

    Piotr Jasiun

    JavaScript Developer

    Piotr has worked as a developer since the end of high school. He discovered CKEditor (FCKeditor) in 2006 while working as a freelancer PHP Web Developer. After spending a year in CERN he decided to come back to Poland and move to a smaller company. In 2013 he became one of our JavaScript ninjas.

    Whenever he can, Piotr improves his experience developing for Android and mobile devices but his true passion is dancing, sailing and rock climbing.

    Keep it simple, stupid!

  • Maciej photo

    Maciej Golaszewski

    PHP Developer

    Maciej was born in Warsaw where he graduated from Military University of Technology in 2008. He holds an MSc in Electronics.

    After working as an editor he became full-time programmer focusing on developing web applications. He develops websites using mainly PHP5 but also has experience in commercial JEE and Android applications.

    Maciej likes to discover new technologies and trends in web development. He also enjoys riding on his motorcycle and playing poker.

    Always code as if the guy who ends up maintaining your code will be a violent psychopath who knows where you live

  • Pawel

    Pawel Wiaderny

    PHP Developer

    Pawel has a Bachelor’s degree in Computer Science and 9 years experience in software development. His early professional career involved working with C++, C# and Java, but now he mainly focuses on PHP and web development.

    Pawel currently lives in Dęblin, Poland. He’s passionate about coding and new technologies. In his spare time he likes to read fantasy books and browse social news sites.

    Every flight begins with a fall

  • Marek photo

    Marek Lewandowski

    JavaScript Developer

    Since he was a child, Marek was fascinated with programming. He started with the usual PHP, JavaScript, C++ and Python languages then moved onto more exotic ones like UnrealScript and AutoHotkey.

    He loves to automate anything that can be automated. He has 5 years of professional programming experience and currently lives in Warsaw.

    Divide and conquer!

  • Szymon

    Szymon Cofalik

    JavaScript Developer

    Szymon has been passionate about computers and technology since his early years. After getting interested in website development several years ago, he focused his career on front-end development. Moving to Warsaw and joining CKSource in 2015 is the latest challenge he took up.

    In his spare time, he enjoys playing card games and eating pie.

    Passions and interests define humans

  • Szymon

    Szymon Kups

    JavaScript Developer

    Szymon lives in Poznań, Poland. He graduated from Poznań University of Technology in 2010 with master's degree in Computer Science. His professional career was always connected with his passion for JavaScript and web technologies.

    You can find him jogging around Lake Malta, playing soccer or making silly mobile games that no one wants to play.

    Attitude is a little thing that makes a big difference.

  • Tomasz

    Tomasz Jakut

    JavaScript Developer

    Tomasz is known as a web conservative and JavaScript fanatic. He loves experimenting with new web technologies and playing with weird JavaScript APIs. Hating nearly every framework that is out there allowed him to start development of mythical "The Only Framework", which probably will never be completed. By joining CKSource Team Tomasz is going to work on some real projects.

    In his spare time he tries to be a playwright.

    JavaScript all the things!

  • Krzysztof

    Krzysztof Krzton

    JavaScript Developer

    Krzysztof has been interested in web development since his early years when he started his adventure with HTML, CSS and a popular PHP based game engine. He loves to code during his work hours as well as in his free time, using Javascript as his language of choice. He is also interested in data mining and machine learning.

    Krzysztof holds a Bachelor's degree in Computer Science from the Polish-Japanese Academy of Information Technology. When away from keyboard, he enjoys sports, playing board games and driving go-karts.

    The question is not if you can do it, but when.

  • Oskar

    Oskar Wrobel

    JavaScript Developer

    Oskar is an ex-surfer from Jurata currently living in Gdynia, Poland. He is working as a JavaScript / Front-End developer since 2009, but he has been interested in Web technologies for almost 10 years.

    You can catch him jogging and cycling in the Tricity forests.

    It always seems impossible until it's done.

  • Kamil

    Kamil Piechaczek

    JavaScript Developer

    Kamil is a programmer, who cares meticulously about each and every piece of his code. Thanks to that he improves his skills every day. He excels in PHP and JavaScript, but is not afraid of new challenges and technologies. In programming Kamil mostly enjoys making products that will bring joy to the end user.

    Before he became a programmer, he played basketball professionally (a sport which he still enjoys after work). In his free time he also likes to play PS4 and develop his new hobby which is Arduino. Kamil is living by the sea, in the sunny Sopot.

    Talk is cheap. Show me the code.

  • Bartosz

    Bartosz Czerwonka

    JavaScript Developer

    He started out as a PHP developer, switched over to Microsoft technologies and now he is focusing solely on NodeJS. He has always been a huge fan of NoSQL technologies.

    For several years, Bart has been building large web apps for government administrations and big e-commerce businesses.

    Bartek knows the “Clean Code” book so well, he can cite it when woken up in the middle of the night. He follows SOLID philosophy and strongly advocates for highest quality, testable code. System architecture, design patterns, and everything asynchronous are a few among his numerous strengths.

    In his spare time, he likes to read a good programming book, grab a beer with his friends at a pub or play some volleyball.

    For Bart being a coder is a way of life.

    Everything should be made as simple as possible, but not simpler.

  • Maciej

    Maciej Krzemianowski

    Frontend Developer

    Born in Białogard. After graduating from high school he moved to Lublin where he was living for 8 years. His big passion is cold steel and for a long time he has worked as knives and BB guns seller. Simultaneously he worked as a freelance web developer. Right after obtaining a Bachelor degree in Networking and Computer Systems at University of Economics and Innovation in Lublin, he realized that building websites is his greatest love and passion.

    In 2013 he found a job in Warsaw as a Front End Developer. He Discovered many JavaScript frameworks but finally realized that pure JS is the best :)

    Recently he's focusing on user experience aspects. Every time when he creates a website or an application, he doesn't think about himself nor the client, but about potential users expectations.

    JS is the best

  • Maciej

    Maciej Bukowski

    JavaScript Developer

    Maciek lives in Warsaw and is passionate about JavaScript since high school. He started with coding small games and then moved to more complex applications. He loves playing with the latest technologies.

    In his free time, he enjoys climbing, both at a gym and outside climbing rocks.

    Measuring programming progress by lines of code is like measuring aircraft building progress by weight.

  • Maciej

    Maciej Turek

    JavaScript Developer

    Maciek lives in Warsaw. He graduated in Mechatronics at Warsaw University of Technology, ended up interested in web development and writing JavaScript code for Smart TVs. Joined CKSource in 2017 to improve himself and acquire new skills.

    In his free time, he enjoys playing board games with his wife and friends.

    Be the change that you wish to see in the world

  • Marcin

    Marcin Niezborala

    JavaScript Developer

    Marcin is a full-stack developer with focus on JavaScript based technologies. He is in love with Node.js from its very beginning. From time to time he likes to get his hands dirty on the frontend side and when he does so, he uses React.

    In his spare time he likes to read... software documentation.

    Humans should solve new problems while machines should solve problems we are already aware of.

  • Marcin

    Marcin Betlinski

    PHP Developer

    Joined the team in the beginning of 2017. Music freak who started his adventure with web development 10 years ago. Created his first HTML+CSS project just to avoid getting kicked out of high school because of missing classes.

    PHP is his language of choice but loves to experiment with Ruby, PERL. Natural born LAMP bugfixer.

    He makes people angry by saying that taking the web development path is not his geeky, money-driven decision, but a way of getting paid for having fun.

    Real Dev doesn't document his code. It was hard to write - should be hard to understand! ;P

  • Kacper

    Kacper Tomporowski

    Junior QA Tester

    Kacper lives in Warsaw, Poland. He obtained his bachelor’s degree in 2015.

    Since he has learned HTML and CSS, creating aesthetic websites became his passion. He loves web technologies and finding bugs, so joining CKSource as a Junior QA Tester was a perfect call to give him the opportunity to develop his “destructive aspirations”.

    After work, he plays guitar, listens to music, plays basketball, experiments with Photoshop and creates websites.

    Without deviation, progress is not possible.

  • Mateusz

    Mateusz Samsel

    Junior JavaScript Developer

    Mateusz was born in Olsztyn, but has been living in Warsaw for the past 10 years. He graduated in Biomedical Engineering from Warsaw University of Technology. For 4 years Mateusz worked in a technical support department where he was solving cases related to JavaScript and HTML.

    He joined CKSource to increase his programming knowledge and skills.

    In free time he likes to play video and board games, reading books and meeting with friends.

    Do or do not, there is no try.

  • Beata

    Beata Delura

    Junior JavaScript Developer

    Frontend and UX enthusiast, she likes challenges and experiments. Before joining CKSource she mainly worked on responsive web applications.

    Living in Warsaw (Poland) but in her spare time, she likes to go outside the city. She enjoys jogging, cycling and walking with her lovely dog.

    Be yourself, everyone else is already taken.

  • Damian photo

    Damian Konopka

    Frontend Developer

    He is never scared of challenges and always happy to learn.

    Damian was born in Warsaw. He really loves this city and never thought about moving to a less crowded place. He has been interested in Front-End for a long time. Thanks to his focus on the UX he is always thinking about making things better for the end users.

    Life isn’t about finding yourself. Life is about creating yourself.

  • Dawid

    Dawid Pawlowski

    JavaScript Developer

    Dawid is a developer who started his adventure with programming from Microsoft technologies. Later on, he dived into the JavaScript world on the Frontend side, but he feels much stronger when using the powers of JavaScript on the Backend. He has knowledge and experience in developing, testing, analyzing and documenting IT solutions.

    Dawid lives in Poznan, graduated from Poznan University of Technology with master’s degree in Computer Science. In his spare time, he goes outside to enjoy sports. Always searching for some fresh music.

    The best way to achieve big goals is to take small steps!

  • Patryk

    Patryk Miszczak

    Junior Node.js Developer

    Patryk was born in Człuchów. His main motivation is the innate need to create, and for that reason, he started programming. He enjoys coding in any language, any style, anywhere and anytime :)

    Linux and Open Source enthusiast.

    Besides that, he is dedicated to music. He likes spending his free time with friends, attending concerts and jogging in the woods.

    Work is the result of craft and art.

  • Anna photo

    Anna Tomanek

    Documentation Manager

    Anna lives near Gliwice, Poland. She is responsible for the development and continuous improvement of the documentation for CKSource products, aimed at all types of users. She also helps with making CKSource's corporate communication more clear.

    Anna holds a M.A. degree in English and has broad experience in working with Computer Science related technical documents.

    Quam bene vivas refert, non quam diu

  • Ryszard photo

    Ryszard Baginski

    UI/UX Designer

    Design and calligraphy have been his passions for more than 15 years. Ryszard gained experience working at the biggest interactive and advertising agencies across Poland. He is constantly looking for new solutions and likes to experiment, not only with UI/UX for which he's responsible at CKSource.

    The blind relies solely on imagination.

  • Wojtek photo

    Wojtek Cichon

    Marketing and Community Manager

    Wojtek comes from a global non-governmental organization where for the past 3 years he was responsible for digital marketing and managing social media. After hours he enjoys spending time with his family and excercising lyrical calisthenics.

    He holds a M.A. degree in English and wrote his thesis on American literature, but that was ages ago.

    When you're in jail, a good friend will be trying to bail you out. A best friend will be in the cell next to you saying, 'Damn, that was fun'.

  • Ludwika photo

    Ludwika Slowikowska

    Customer Success Manager

    Customer Services professional with holistic approach to clients’ motivations and expectations. ‘Can-do’ person with constant strive for cohesion and excellence, and with absorbing weakness of subjecting every single task to logical analysis.

    Coach of Institute of Customer Service fascinated with human behavior, process improvement, problem solving, and difficult and complicated logic puzzles. Good listener and observer with experience on independent posts and in multicultural environment.

    A goal without a plan is just a wish.

  • Katarzyna photo

    Katarzyna Kaczmarek-Gut

    Marketing Manager

    Katarzyna is a MCIM member of the UK’s Chartered Institute of Marketing and holds the CIM Professional Diploma in Marketing. She has recently completed a postgraduate degree in Digital Marketing from the Warsaw School of Economics.

    She has more than 10 years of experience working in marketing and business development for the private and public sector in Poland and in the United Kingdom. She is passionate about business model canvas, value proposition design and Internet-based customer value management.

    In her spare time she enjoys spending quality time with her family and friends. She loves cross-fit like workouts and cinema.

    Take a chance. It’s the best way to test yourself. Have fun and push boundaries.

  • Ewelina photo

    Ewelina Buczynska

    HR Manager

    Ewelina has over 5 years Human Resources experience (3 years in IT). She likes working with people and watching them grow professionally.

    She graduated from Military University of Technology (MSc in HRM) and is completing a degree in Psychology.

    Ewelina joined CKSource in 2013. She lives in the suburbs of Warsaw.

    Whatever you can do or dream, begin it. Boldness has genius, power and magic in it

  • Aleksandra

    Aleksandra Bălc

    Finance Manager

    Aleksandra is coming from Lodz, but lives in Warsaw and enjoys it :-) She graduated Faculty of Economic Sciences from the University of Warsaw. At CKSource she is responsible for all financial matters and supporting management in business decision making.

    In her free time Aleksandra likes to cook vegetarian dishes and meet friends offline, but her biggest passion is travelling - Cuba is next!

    If you do something, do it right!

  • Monika

    Monika Zajaczkowska

    Finance Manager

    Monika graduates the Warsaw School of Economics and has over 6 years experience working with companies in banks. She enjoys making small companies getting bigger and greater. She lives in the suburbs of Warsaw.

    In her spare time she loves to spend time in the garden taking care of plants or reading crime stories. In CKSource she is responsible for all financial issues.

    Intelligence without ambition is a bird without wings

  • Rafal Stalewski photo

    Rafal Stalewski

    Sales Manager

    Rafal brings to CKSource years of experience in selling business solutions to enterprise customers. He worked for mega-vendors like Oracle and Microstrategy but also for smaller companies - which he does enjoy very much. After work, Rafal tries to be a good father and husband (or the other way around).

    He also spends a few hours weekly on his bicycle listening to thrash metal bands as well as plays tennis.

    Do not be afraid of the New … change is everything

  • Adrian Kruszewski photo

    Adrian Kruszewski

    Account Manager

    Adrian moved to Poland from US where he graduated with Bachelor’s degree in Law and Justice from Rowan University. Before joining CKSource he worked as a Sales and Account Manager at an e-commerce company.

    Currently he lives in Warsaw and in his spare time enjoys extreme sports.

    There are no traffic jams along the extra mile

  • Justyna Wlazinska photo

    Justyna Wlazlinska

    Administrative Specialist

    Justyna takes care of supplies, vendors, organizes our events and makes sure office runs smoothly.

    She graduated from Life Science University with MD in environmental protection. In her spare time, Justyna enjoys outdoor activities.

    One small positive thought in the morning can change your whole day.

  • You photo

    This could be you

    Future JavaScript Developer

    CKSource is always looking for talented JavaScript developers to add to its ranks in Warsaw, Poland. Visit our Join Us page to see which jobs are currently available.

    Join our team!