ONE-STOP SHOP FOR YACHT
DESIGN AND DEVELOPMENT
Our Profile
Serving boatbuilders with:
Concepts
Branding
Naval architecture
Exterior and interior design
Engineering
Build process design
Milling and tooling
Prototyping
Our ID
400
Projects
65
Clients
28
Countries Served
1983
Since
135+
Boat of the Year or Design Awards
75,000+
Boats And Yachts Built Worldwide Based On Our Designs
About J&J Design
From first sketch to finished mould, J&J Design handles the full development chain. Concept, naval architecture, exterior and interior design, structural engineering, production process design, prototyping, and CNC tooling — all under one roof, all coordinated by the same team.
J&J Design Office was founded by Japec and Jernej Jakopin in 1983 in Ljubljana, Slovenia. First decade was marked by bestselling designs for large sailboat makers like Elan, Jeanneau and Bavaria. From 1990 the office was supported by an in-house plug and mould shop which enabled the office to offer full scope of development (from concept, naval architecture and engineering to tooling and prototyping).
J&J started to design powerboats in 1987. Most of the work is devoted to this area since the last 30 years, based on extensive research work in tank-testing facilities. Applying the carbon/epoxy technology in the world of production boatbuilding gave birth to the Shipman carbon sailboat range, starting in 2002. Their first diesel-electric and full electric range called Greenline started in 2008 and today the J&J designs represent over 1000 hybrid boats in the field, by far the largest fleet worldwide.
In 2011 the newly founded Chinese power catamaran brand was Aquila, which grew to today's largest powercat brand based on J&J designs. In the last years the office did designs for the fastest growing powerboat brand in the world, Saxdor, successfully ventured in full-electric foiling technology with the BMW/Tyde project and the latest Beneteau Group full-electric island cruising concept project. Today the work of J&J is based on a history of 400 projects for production builders on three continents.nts.
FAQ
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The full development scope — concept, branding, naval architecture, exterior and interior design, structural engineering, build process design, prototyping, and CNC mould tooling. Power and sail, 20 to 80 feet. The office has completed over 400 projects for boatbuilders across 28 countries, with more than 75,000 boats built worldwide from J&J designs.
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Yes, and has done for over two decades. J&J pioneered carbon fibre epoxy prepreg in production cruising yachts and developed the Greenline hybrid diesel-electric-solar powerboat series. The office also designed the Shipman 59 Hybrid Solar Carbon in 2014. These contributions earned the founders the Designer of the Year award at the Boat Builder Awards Amsterdam in 2024.
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Forty years in continuous operation. Over 400 completed projects, 65+ boatbuilder clients, 28 countries, 135+ Boat of the Year and Design Awards. The office was established in 1983 by brothers Japec and Jernej Jakopin — the same principals who lead it today.
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That is the standard model. Design, structural analysis, and production engineering run as one integrated process. CNC plug and mould production is available through sister company RnD d.o.o. in Bled, Slovenia — two 20-metre 5-axis machines, over 2,000 m² of work area, 40 CNC technicians.
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Email info@jnj.design or call +386 40 671 001. The office responds within 1–2 business days and is experienced in remote project collaboration across Europe, North America, and Asia-Pacific.
TOOLING
Reduced development costs, shortened time to market, improved quality.
Two 20 m 5-Axes Milling Machines
With Over 2000 m² of Work Area
40 CNC and Shop Floor Technicians
Please visit our sister company RnD to learn more about tooling!
