K eltus
Custom-software studio

We don't ship
WordPress sites.

We design custom solutions for clients who need more than a template. Ultimate speed. Post-quantum encryption. AI integration. Go-powered automation. We listen to the problem, then build exactly what fits it.

See our work → Start a project
  • 100Lighthouse score, every build
  • Post-quantumcryptography in production
  • Gofor the back-end-heavy lifting
Receipts — rebuild

Sarah Westall site rebuild.

Same content, completely modernized — faster, more beautiful, more engaging, and with proper light and dark modes. WordPress on the left, our rebuild on the right.

WordPress (before)

sarahwestall.com

34
Perf
84
A11y
96
BP
92
SEO

Modernized rebuild (after)

dev.gnews.cz staging

99
Perf
100
A11y
100
BP
100
SEO
Receipts — head to head

NewsTosser vs. The New York Times.

A live NewsTosser destination site versus nytimes.com. Same Lighthouse run, same day.

nytimes.com

Google PageSpeed, May 2026

32
Perf
88
A11y
54
BP
92
SEO

NewsTosser site

One of hundreds in the network

97
Perf
100
A11y
100
BP
100
SEO
What we've built

Selected projects

All projects →

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

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

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

GoWeb

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

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

Cabinet Builder

Parametric cabinet design that exports straight to the CNC.

  • DXF export with semantic layer naming
  • 32mm European standard joinery
  • Per-thickness file splitting
Who's building

The team.

Meet everyone →
John Devlin Lead Project Manager Boca Raton, Florida, USA
Pavel Kuznetsov Principal Backend Engineer Moscow, Russia
Nina Becker Frontend Lead Berlin, Germany
Tomáš Novák Principal Cryptographer Prague, Czech Republic
Yuki Nakamura Mobile Engineering Lead Tokyo, Japan
Eitan Cohen AI & Data Engineer Tel Aviv, Israel
Jelena Marković Head of Design & Conversion Belgrade, Serbia
Tuomas Korhonen Head of Infrastructure Helsinki, Finland

Got a hard problem?

Speed. Crypto. AI. CNC automation. Tell us what you need — we'll tell you what's actually possible.

Start a conversation →