01
Web Design & UX
Designed for technical buyers
Websites that make a complex technology clear, credible and desirable to the people who buy it.
OUR CLIENTS
Y Combinator startups, industrial companies, US hardware manufacturers: they build technologies that reshape their industry. We build the websites that make them visible.
At Junca, we create clear, immersive experiences that turn your website into a real growth lever.
01
Designed for technical buyers
Websites that make a complex technology clear, credible and desirable to the people who buy it.
02
The right stack for your stage
Framer when your team needs to move fast; custom code in Astro or Next.js when you need performance, integrations and scale.
03
Complex technology, made visible
Real-time 3D with React Three Fiber and WebGL, so visitors can see, turn and understand your product in seconds.
04
Identity and website, one system
A visual identity decided once and applied everywhere, from the pitch deck to the product UI.
05
Built to be found and cited by AI
Technical SEO from the first wireframe, plus the AI layer: content that search engines rank and that AI assistants quote.
Selected work
Extraordinary products, undersold by their websites: that's the gap we close for tech and deeptech companies. End to end: art direction, custom development, real-time 3D, content.


Kestrix: making thermal data readable to accelerate building retrofit

Hylight: an aerial inspection technology driven by design.

Building the showcase website for Artefact, a space for their creative work

( What we fix )
Founders and researchers build extraordinary technology, and rarely have the eye, or the time, for the design it deserves.
We give complex technology the clarity it needs: sleek, premium websites that present hard things simply, so investors, clients and talent get it in seconds. A small team, and a direct line to the people who design and build.
Why work with us
At Junca, we believe a great website starts with a great relationship. No complex process, no middlemen. Just a dedicated, responsive team and a smooth workflow to move your projects forward, fast and well.
01
No filter, no salesperson.
At Junca, you work directly with the people who design your website. It's faster, smoother, and your ideas don't get lost along the way.

02
Everything centralized, everything simple.
We give you access to a custom Notion portal to track every step: briefing, moodboards, design, feedback. Clear, efficient, collaborative.

03
No developer needed to change a line of text.
Your team updates the site on its own, in the Framer CMS or in Sanity, with zero technical dependency.

04
Small team, big availability.
We're an independent, human-sized studio, and genuinely available. Got a question? An idea to test? We're here, fast, no delays.


4 min read
Jargon repels even when you define it, and visitors read 25% of your words. The layered-narrative method we use to make deeptech legible, from Hylight to Kestrix.

11 min read
Islands architecture, 66% real-world Core Web Vitals pass rates, shader-level control with Three.js and TSL: the stack we use when a project outgrows no-code, and when we still say Framer.

5 min read
Your deck gets two minutes of attention. Your website gets the rest of the diligence. What VCs actually check on a startup website before a Series A, backed by Harvard and DocSend research.

6 min read
A generic website is no longer enough for a deeptech startup. Investor credibility, talent acquisition, market positioning: why web design is an underestimated strategic lever.

5 min read
Is Framer the right choice for your business website in 2026? Features, performance, limitations, costs, and real-world feedback after dozens of projects.

6 min read
The most common UX mistakes we see on tech company websites, and how to fix them to stop losing conversions.

7 min read
Building a high-performing website isn't about adding SEO at the end. Here's how to structure content, architecture, and visibility for SEO and GEO from the start.

9 min read
With AI generating layouts and no-code tools commoditizing websites, where does custom web design still create real value in 2026?
Client voices
Junca works with tech and deeptech companies: founders who build hard things and need a website that makes them obvious.
We keep part of our year for agencies and creative studios, the projects where we push craft, motion and real-time 3D further.
We think most tech websites look the same: templates, stock 3D, copy nobody reads. We believe in clarity, character and conversion.
Josh ElijahCEO, BotBlox SystemsRead the case study“This is absolutely what we wanted for our website. They could not have done a better job, my team and I are beyond thrilled. This will not be the last time we work with Jules and Studio Junca.”
Martin BockenCEO & co-founder, HylightRead the case study“The Junca team immediately understood our technical challenges and our need for clarity. The result is fluid, immersive, and perfectly aligned with our tech positioning.”
Luigi KassirCEO, Skipper NDTRead the case study“The final website perfectly reflects Skipper NDT’s identity. Junca was able to adapt, understand our project in depth, and translate it accurately into the website.”
Lucy LyonsCEO, KestrixRead the case study“Working with Junca was simply delightful. The team is professional, visionary, and creative, and we are extremely satisfied with our output. Would 100% work with Jules and team again.”
Let's keep in touch
Get in touchMost projects start around $6,000 for a focused website on Framer. Larger projects that include branding, custom 3D and WebGL experiences and complete copywriting usually reach $20,000 or more. The price depends on the number of pages, the level of animation and 3D, and the content and SEO work involved. After a free introductory call, we send you a detailed quote.
A marketing website usually takes 4 to 6 weeks once the brief is approved. Projects that add branding, 3D scenes or custom animation take 8 to 12 weeks. You follow every stage in a shared Notion workspace with clear milestones, so you always know what comes next.
Yes. On Framer, your team edits text, images and articles directly in the Framer CMS. On Astro or Next.js, we connect a headless CMS such as Sanity: you publish a page or an article and the site updates within minutes, without touching any code. We train your team at launch and stay available afterwards.
We pick the one that fits your project. Framer is ideal for marketing sites your team wants to edit visually and launch fast. Astro, usually paired with Sanity, suits sites with a lot of content that need very fast loading and 3D in the browser. Next.js suits products with accounts, dashboards or app features. All three produce fast pages that search engines and AI assistants can read, with no plugins to maintain like on WordPress.
Besides web design and UX, we offer four services that work together or on their own: development on Framer, Astro or Next.js; 3D and immersive experiences built with Blender and WebGL; branding and visual identity, from logo to brand guidelines and art direction; and SEO and AI search optimization, so your company shows up on Google and in answers from ChatGPT or Perplexity. Most clients combine two or three of them.
It starts with a free call to understand your product, your audience and your goals. We then work in a shared Notion workspace with clear milestones: strategy, art direction, UX and UI design, development, testing and launch. You talk directly to the people who design and build your site, and you review the work at every milestone.
Three things. An engineering background: we read the white papers and understand the hardware, data or AI behind your product before designing anything. A track record with technical companies, from Hylight (Y Combinator S23) to Kestrix, Skipper NDT and BotBlox. And 3D and WebGL produced by our own team with Blender, so complex products become tangible. You work directly with the people who design and build your site, with no account manager in between.
Junca Studio is a French studio based in Paris. We work remotely with tech companies in France, the United Kingdom and the United States, in English or French, from the first call to launch.