Building at scale,
one site at a time.
I build multilingual programmatic SEO platforms on Astro and Cloudflare Workers. Data-rich niches, 40–50+ languages, edge rendering, ads, affiliates, and AI-assisted production systems — run as a one-person OSVČ operation.
Projects
GoTripzi
A multilingual travel portal covering 237 destinations across 48 languages. Fully programmatic — every page generated, translated via Gemini Flash, and indexed. From zero to meaningful revenue in under 3 months.
Plix.gg
A browser games portal like CrazyGames and Poki with 50,000+ games across 51 locales. Astro SSR on Cloudflare Workers, Neon via Hyperdrive, Drizzle, Better Auth, pgvector, Vectorize, Thompson Sampling recommendations, season passes, achievements, leaderboards, and R2-backed AI media pipelines.
WorldStats
A city statistics platform for 180,000 cities across 40–50+ languages. Verticals cover weather, forecasts, time zones, sunrise and sunset, holidays, name days, and climate data, backed by self-hosted Open-Meteo on Hetzner with DWD, NCEP, ECMWF, and CAMS models.
DigitSum
A multilingual calculator site applying the same programmatic SEO playbook. 124 tools across 50+ languages targeting high-intent finance and utility queries with contextual CPC monetization.
Infinity Algo
Trading signals and indicators platform for TradingView. Custom Pine Script indicators with AI optimization, a prediction game livestream bot, and a customer dashboard with payment integration.
The Operator
I'm Jan Křenek, a solo developer and publisher based near Česká Lípa, Czechia. I operate as a Czech OSVČ and use AI as a force multiplier, fusing programmatic SEO, Cloudflare edge architecture, content systems, and monetization into a portfolio I run entirely solo.
Solo Operator
Strategy, engineering, content systems, SEO, monetization, and partnerships stay under one roof.
AI-Native Workflow
Cursor for development, Gemini Flash for translations and content, and custom pipelines for thumbnails and previews.
Infrastructure-Minded
Astro, Cloudflare Workers, KV, D1, Neon, Hyperdrive, R2, and Hetzner servers where self-hosting wins.
The Playbook
Build Programmatically
Generate content-rich sites across 40–50+ languages using LLM translation at scale. One template, thousands of pages, millions of keywords.
Deploy on the Edge
Run fast sites on Astro + Cloudflare Workers, with Workers Cache API, KV, D1, Neon, Hyperdrive, R2, and Hetzner-backed services where the math is better than API calls.
Monetize Intelligently
Match the business model to the site: Setupad, NitroPay, AdSense, Stay22, GetYourGuide, Travelpayouts, contextual CPC, and premium SaaS when ads are the wrong fit.