Sedaiia

About Sedaiia

Sedaiia is a boutique web studio specializing in aesthetic and creative niches. We build websites, landing pages, and full-stack products that look good and work; from first concept to live deployment.

Founded by John Patrick Koosman, Sedaiia sits at the intersection of design and development. With a background spanning graphic design, print, and over a decade in the high-end creative industry, we bring a visual standard to web work that most studios don't.

What we do: — Client work: websites and landing pages for brands with taste — Own products: tools built from real problems, shipped with the same stack

Currently in product development: Cllect, an approve-first workflow platform for high-end tattoo artists — in beta with active users.

Stack: Next.js · TypeScript · Supabase · Vercel · Shadcn/ui · Stripe · Resend

sedaiia.com · hello@sedaiia.com

Keywords

• Graphic Design
• Illustration
• Landing Page Design
• Software Development
• Squarespace
• Ui/Ux Design
• Web Design
• Web Development
• Webdesign

Address

• Headquarters

  AmsterdamNoord-Holland, Netherlands

Team by function

Based on 2 public job profiles as of 4 September 2026.

• Other / Unclassifiable2