CARLO CIFARELLI
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EX.22·DEVELOPMENT·2026
WORKS / EX.22 / SINTONIA — ASTROLOGY & TAROT APP

Sintonia — Astrology & Tarot App

WHEN
2026 · active
CLIENT
Sintonia
CATEGORY
DEVELOPMENT
STACK
15 TECHNOLOGIES

Self-initiated cross-platform (iOS + Android) astrology & tarot product — “you were born with a frequency”. Blends Western astrology, tarot, the Mayan Tzolkin and Human Design into a single personal-insight app with LLM-authored interpretations, connected and manual profiles, synastry between people, and a freemium paywall.

SEC.01

project.notes

DETAIL

Kotlin Multiplatform + Compose Multiplatform, one shared codebase across Android, iOS and JVM. Built a pure-Kotlin ephemeris engine replacing SwissEph — VSOP87 planets, ELP2000 Moon, PLUTO95 and analytic nodes accurate to a few arc-seconds — powering natal charts, transits, synastry, event finders and astrocartography with zero native dependencies in common code. Persistence via SQLDelight; DI with Koin. Backend is a Directus + Ktor stack (auth, day/pair caches, LLM interpretation jobs, name→gender, invitations, tracing) live at api.getsintonia.com, deployed through a Jenkins pipeline with git-crypt-encrypted secrets. Android beta ships via Firebase App Distribution; marketing site on Astro.

#RESPONSIBILITYSTATUS
R.01FounderOWNED
R.02Software ArchitectOWNED
R.03Kotlin Multiplatform EngineerOWNED
R.04Backend EngineerOWNED
R.05DevOps EngineerOWNED
SEC.02

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15 TECH · 2 GROUPS

INFRA / DEVOPS

  • Jenkins01
  • Docker02

TOOLING

  • Kotlin01
  • Kotlin Multiplatform02
  • Compose Multiplatform03
  • SQLDelight04
  • Koin05
  • Ktor06
  • Directus07
  • Firebase08
  • Anthropic09
  • Gradle10
  • Astro11
  • Swift12
  • Android13
SEC.03

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20082026 · THIS PROJECT HIGHLIGHTED
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© 2026 CARLO CIFARELLI · SOFTWARE ENGINEER · ROME / IT00000000BUILT WITH NEXT.JS · MONO