ilya karnaLet’s talk

Hi, I’m Ilya.

Senior Product
Engineer.

Full-stack developmentUI/UX design

I design and build websites and apps.
From the first idea to the final detail.

Explore my work Tech stack
17+

Years designing & building

40M+

Users reached

3

Co-founded products acquired

My tech stack

The tools I use to design and build websites and apps.

  • Next.js & React
  • React Native
  • Node.js
  • TypeScript
  • WordPress & Webflow
  • Figma & Photoshop
We hired Ilya as a front end developer a few years ago, but we got much more than expected. Ilya is not only a very skilled front and back end developer, but also a very good UX designer with a creative and entrepreneurial mind.
Fernando Davila

Fernando Davila | Founder and Creative Director at Evo Creative

Websites & apps I’ve built

From the first idea to launch, and the results that followed.

OneRent.ae

I joined an existing car rental platform and rebuilt the experience to match the luxury market it serves.

My contribution

  • Redesigned the UX and UI after months of earlier development.
  • Rebuilt most of the frontend in Next.js and TypeScript.
  • Built rental partner onboarding and document upload and processing workflows.

Outcomes

  • 40% increase in paying users
  • 95+ PageSpeed scores

SleepBetter

Sleep stories, music, sounds, and breathwork in one mobile app.

My contribution

  • Designed the experience and built the React Native app.
  • Ran extensive onboarding and paywall experiments.
  • Led the product from launch through growth and acquisition.

Outcomes

  • 300,000+ installs
  • 4.9 average rating
  • Acquired in 2024

iVisit England

A network of platforms for discovering and booking attractions and experiences across the UK.

My contribution

  • Worked directly with the founders on the UX and UI.
  • Built the frontend and backend across five regional platforms.
  • Implemented payments and ran A/B tests.

Outcomes

  • Millions of tourism searches

Leo: Therapy & Quiz

A mobile app bringing therapy and interactive quizzes into one personal growth experience.

My contribution

  • Designed a cohesive mobile experience across therapy and quizzes.
  • Built the app from the initial designs through to a working product.

Outcomes

  • 100,000 users
  • Acquired in 2025

London Theatre Direct

A redesign of a major London theatre ticketing website, focused on turning more visits into bookings.

My contribution

  • Led UX research, wireframes, and UI design.
  • Worked directly with the CEO to modernise the brand.
  • Partnered with developers to bring the redesign into the live website.

Outcomes

  • 30% conversion uplift after the redesign

Archetype AI

An AI product for personal growth and accountability that I designed and built from scratch.

My contribution

  • Turned the initial idea into the product experience and UI.
  • Built the full product with Next.js and TypeScript.
  • Built the backend with Supabase and PostgreSQL.

Outcomes

  • Idea to launch in five weeks

Hector: AI Therapist

An AI therapy app I designed and built before ChatGPT existed.

My contribution

  • Designed the experience and built the React Native app and backend.
  • Trained the AI on therapy conversations and brought in therapists to help improve it.
  • Built subscriptions, analytics, and feedback loops to keep improving the product.

Outcomes

  • 600,000+ users
  • Featured by Apple
  • Acquired in 2025

Gazelle Corporation

A corporate website for a Canadian B2B telecom provider.

My contribution

  • Redesigned the site to make services and onboarding easier to understand.
  • Built the website and custom UI components.

Outcomes

  • Clearer service discovery & onboarding
Ilya is a relationship-oriented person with the right attitude. Hard-work and dedication are always part of Ilya’s efforts. His help with Crowdholding helped us propel our business and I advise to get in touch with Ilya if you want the same for your venture.
Alex Bozh

Alex Bozh | CMO at Crowdholding, X-Googler