Case study

Cliptic — Collaborative audio annotation

Problem: desktop ELAN/TextGrid slows distributed teams. Solution: collaborative web editor with full interoperability and scalable annotation.

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What it brings

  • Layered editor with tiers and undo/redo
  • Whisper-assisted transcription
  • Import/export: EAF, TextGrid, RTTM
  • Bulk ingestion via ZIP
  • Workspaces with roles and templates
  • Read-only sharing via token
  • i18n: ES, EN, PT

Outcomes

  • Reduces dependency on desktop tools
  • Onboarding in minutes (browser + link)
  • Preserves interoperability with linguistic workflows
  • Scales from small teams to agency operations
  • Ideal for teams that demand traceability without losing speed

Stack

  • TypeScript
  • Next.js 15 + React 19
  • PostgreSQL + Prisma
  • pg-boss
  • S3 / Cloudflare R2
  • Whisper
  • Auth.js v5
  • Stripe
  • Docker + Dokploy

Architecture

Modular Next.js monolith with a separate queue worker on PostgreSQL. Audio stored in S3/R2 with signed URLs and a versioned export API.

Evidence

  • Documentation for positioning, GTM, and runbook
  • Export validated in 6 formats
  • QA with Vitest + Playwright
  • Prisma schema with ~30 models
  • Production deploy: Docker Compose + Dokploy (VPS)
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