K eltus
Portfolio

Things we've built.

Every project here was built from scratch to fit the client's actual problem — no themes, no plugins, no template farms.

GNews.cz

GNews, an Eight Language Beast< Perfect Speed, Perfect SEO.

  • 8 languages
  • 40K pre-rendered pages
  • <250 ms TTFB

Keltus.io

This site is also a demo. The whole stack runs on a mini PC under a desk — and PageSpeed scores it 100/100/100/100.

  • 100/100 PageSpeed
  • 0 ms TBT
  • Sub-second LCP
Web

Sarah Westall

Complete rebuild of a 100K-monthly-viewer media site — WordPress out, Astro + Directus in.

  • Performance 34 → 99
  • 1,800+ static pages built in ~5s
  • Custom affiliate marketing system

cop.chat

Real-time discussion forum with E2E-encrypted DMs, anonymous posting, and pluggable AI.

  • Signal-protocol E2E DMs
  • Anonymous posting via blind signatures
  • WebAuthn passkeys

Zavos International Dating

Cross-language dating platform with real-time AI translation across 16 languages and 32,000+ cities.

  • Self-hosted Ollama translation
  • Real-time WebSocket chat
  • P2P voice/video via WebRTC
iOSAndroid

SecureVote

Ultra-secure election system with a remote Android voting app — designed for post-quantum migration.

  • Post-quantum ready
  • End-to-end verifiable
  • VVPAT paper audit trail
Android

DisApp Messenger

Compliance-archived end-to-end encrypted messenger with escrow key recovery — no client-side backdoor.

  • Per-device E2E encryption
  • Air-gapped escrow key recovery
  • Two-role unlock (admin + auditor)
Android

NewsTosser

AI news aggregation that rewrites unique articles for hundreds of destination sites.

  • Hundreds of live destination sites
  • Per-target rewrite for uniqueness
  • Pluggable LLM providers