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Hello! I'm Sjoerd Hello! I'm Sjoerd

I help business owners improve their website and increase conversion.

I build websites from start to finish. Handling design, brand identity & webdevelopment.

I’m a freelance designer, developer and digital marketing specialist. I help small businesses improve their website and increase conversion. I specialize in brand identity, web design/development and elevating UX skills for in-house teams.

Sjoerd Koelewijn

My work

This is a selection of my work. I help clients with a wide range of services, from hands-on coding and design to high-level strategy. 

This what my clients say

I focus on building long-term partnerships and help my clients turn ideas into real growth for their business.

Sjoerd redesigned our website in a very methodical way, making it look better while rebuilding the underlying framework so we're set for years to come. He helped us define what we needed and offered concrete solutions to achieve it. He's very communicative and guided our team through the whole process, even after launch when we had questions about updates.

Riekelt Houtkooper

Professor at Amsterdam UMC

Sjoerd take you through the process of creating a website. He is structured in his approach and patient in explaining the process to the layman. In addition, he is good at analyzing your needs and creative problem solving. Highly recommended!

Gerbrand Korevaar

Curator at Hemp Museums

I recommend Sjoerd for your websites! Sjoerd remade our academic website NADIS.eu; an EU funded consortium on NAD+ biology training 10 PhD candidates in labs across Europe, including ours; he was timely, thorough, thought along with us, and added his creative talent into the mix. Would highly recommend and come back for the next website.

Georges Janssens

Assistant Professor - Amsterdam UMC

Having a website built by Sjoerd means you’ll hardly have to do any work yourself. He thinks along with you and goes the extra mile in his advice: coming up with solutions you hadn’t thought of yourself. Moreover, communication is direct, and you can count on quick service. In short, excellent value for your money!

Theo Heldoorn

Project Officer, Elburg Municipality

I had the pleasure of working with Sjoerd on transferring our old WordPress website to a modern version and I highly recommend him. He was responsive, clear in communication, and proactive in finding solutions. He also provided helpful custom resources that made managing the new site much easier. The final design is clean, professional, and exactly what we wanted.

Maria M. Trętowicz

PhD Candidate at Amsterdam UMC

Sjoerd really helped us connect with our potential customers. The Kopse Waard website is a great tool for presenting our plans and gathering feedback.

Anne Haga

Project lead at de Kopse Waard

We worked with Sjoerd on the new website for NADIS, our European consortium focused on NAD research, and the results were fantastic! He made a clean, modern and easy to navigate website. The whole process was super smooth and the results were astonishing. I would highly recommend Sjoerd to anyone looking for a creative and reliable web designer.

Rubén Zapata Pérez

Universidad Católica San Antonio de Murcia

Always a quick response and a solution. With clear explanations about how you can adjust things yourself if you want, or to have them fixed if that's what you want.

Helen van Empel

Founder / Owner at Onesession

We couldn’t be happier with our new, original website! Sjoerd came up with a design proposal and structure for our new website that we immediately liked. During the process he was always helpful and patient, had an eye for detail and often thought a few steps ahead.

Simone Badoux

Marketing Manager at Hemp Museums

Always a quick response to questions and helpful. I enjoyed working together with Sjoerd.

Henrike Kusters

Content manager at Onesession

Sjoerd redesigned our website in a very methodical way, making it look better while rebuilding the underlying framework so we're set for years to come. He helped us define what we needed and offered concrete solutions to achieve it. He's very communicative and guided our team through the whole process, even after launch when we had questions about updates.

Riekelt Houtkooper

Professor at Amsterdam UMC

Sjoerd take you through the process of creating a website. He is structured in his approach and patient in explaining the process to the layman. In addition, he is good at analyzing your needs and creative problem solving. Highly recommended!

Gerbrand Korevaar

Curator at Hemp Museums

I recommend Sjoerd for your websites! Sjoerd remade our academic website NADIS.eu; an EU funded consortium on NAD+ biology training 10 PhD candidates in labs across Europe, including ours; he was timely, thorough, thought along with us, and added his creative talent into the mix. Would highly recommend and come back for the next website.

Georges Janssens

Assistant Professor - Amsterdam UMC

Having a website built by Sjoerd means you’ll hardly have to do any work yourself. He thinks along with you and goes the extra mile in his advice: coming up with solutions you hadn’t thought of yourself. Moreover, communication is direct, and you can count on quick service. In short, excellent value for your money!

Theo Heldoorn

Project Officer, Elburg Municipality

I had the pleasure of working with Sjoerd on transferring our old WordPress website to a modern version and I highly recommend him. He was responsive, clear in communication, and proactive in finding solutions. He also provided helpful custom resources that made managing the new site much easier. The final design is clean, professional, and exactly what we wanted.

Maria M. Trętowicz

PhD Candidate at Amsterdam UMC

Sjoerd really helped us connect with our potential customers. The Kopse Waard website is a great tool for presenting our plans and gathering feedback.

Anne Haga

Project lead at de Kopse Waard

We worked with Sjoerd on the new website for NADIS, our European consortium focused on NAD research, and the results were fantastic! He made a clean, modern and easy to navigate website. The whole process was super smooth and the results were astonishing. I would highly recommend Sjoerd to anyone looking for a creative and reliable web designer.

Rubén Zapata Pérez

Universidad Católica San Antonio de Murcia

Always a quick response and a solution. With clear explanations about how you can adjust things yourself if you want, or to have them fixed if that's what you want.

Helen van Empel

Founder / Owner at Onesession

We couldn’t be happier with our new, original website! Sjoerd came up with a design proposal and structure for our new website that we immediately liked. During the process he was always helpful and patient, had an eye for detail and often thought a few steps ahead.

Simone Badoux

Marketing Manager at Hemp Museums

Always a quick response to questions and helpful. I enjoyed working together with Sjoerd.

Henrike Kusters

Content manager at Onesession