Cairn

Cairn — StudioApps & WebsitesEst. 2026

We build apps
& websites.

A two-person studio. We design and ship real products end to end — interface, engineering, the whole thing. A few we’ve built below.

AlexProduct Engineer
LiyaProduct Designer

Selected Work

04 Projects / 2026
01Product · Web

Design → build · end to end

FluentAI website — dual subtitles for Netflix and YouTube

FluentAI

Dual subtitles that turn Netflix, YouTube & Disney+ into a language tutor — tap any word to translate it, hear it, and save it to a deck you’ll actually review.

Web AppBrowser ExtensionProduct Design
fluentai.pro Visit ↗
02Product · Web

Design → build · end to end

Acepe website — the agentic developer environment

Acepe

A native agentic developer environment — run Claude Code, Codex, Cursor & OpenCode locally, orchestrate parallel sessions, and ship from plan to PR.

Desktop AppDeveloper ToolEngineering
acepe.dev Visit ↗
03Product · Web

Design → build · end to end

Luminar website — any video or page, clear in seconds

Luminar

Turns any YouTube video or readable page into a clear, scannable editorial summary with diagrams — right where you watch or read, in one click.

Browser ExtensionWeb AppProduct Design
useluminar.com Visit ↗
04Product · Web

Design → build · end to end

Onie website — a public feed of agent workflows from practitioners

Onie

A public feed of agent workflows from people doing the work — each post documents what they run, how it’s wired, and which tools it depends on, tagged by discipline and stack.

Web AppCommunityProduct Design
onie-web-production.up.railway.app Visit ↗

The Studio

Cairn is two people, no handoffs — the ones who design it are the ones who build it. Apps, websites, and browser extensions, from blank page to shipped.

Alex

Alex

Product Engineer

Founder, FluentAI

Builds full-stack products end to end — TypeScript, React, Node, Python — from browser extensions to agentic dev tools. Founded FluentAI and is building Acepe. CS degree plus a machine-learning certificate from Israel Tech Challenge.

Liya

Liya

Product Designer

Co-founder, FluentAI

Shapes how the products look, feel, and reach people — leading product design and business development as co-founder of FluentAI and Acepe. Studied at Plekhanov University of Economics.

Let’s build yours.

sasha@fluentai.pro

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