Andrei Alexandrui
2026Co-founder / Engineering Lead
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Renda

Turns Claude Design exports into decks, carousels and PDFs

tryrenda.com

People were screenshotting their Claude Design work and posting it blurry. That was the whole problem. Renda takes the export, standalone HTML or a project ZIP, and gives back clean PNGs, LinkedIn carousels, PDFs and PowerPoint decks. I built the technical side. My co-founder found the people. It passed a thousand users without us paying for a single one.

  • 1000+ users and recurring subscribers across multiple countries, all through organic acquisition
  • Architected an AI plus runtime split: an LLM emits a small JSON render recipe that a fixed, fully-tested headless-browser runtime executes, so new design patterns need no new code
  • Migrated inference from Azure OpenAI to Google Vertex AI with zero user-facing downtime, running both providers in parallel during cutover
  • Built the provider layer as an ordered try-list behind one interface, making vendor changes a config-only edit with an environment-variable rollback path
  • Built the whole stack on Cloudflare Workers edge compute: Hono API, Browser Rendering, R2 and KV with TTL expiry, and cron triggers
  • Wrote OOXML emitters from scratch to produce valid .pptx and .pdf output without third-party render services
  • Shipped the full commercial layer: Supabase Auth, Polar checkout with HMAC webhook verification, quotas, anti-abuse caps, and referral and affiliate programmes
  • Drove development with Claude Code as an agentic pair-programmer, spec first and test first, keeping architecture and verification decisions with me

TypeScript, Cloudflare Workers, Hono, React 19, Vite, Google Vertex AI, Supabase, Polar

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Fig. 1
Renda app, drop a Claude Design export to render
Renda app, drop a Claude Design export to render
Fig. 2
Screenshot versus Renda PNG export quality
Screenshot versus Renda PNG export quality
Fig. 3
Each slide rendered as its own clean PNG
Each slide rendered as its own clean PNG
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Andrei Alexandru

Andrei Alexandru, AI Engineer, London, UK.

alexandruciprian61@gmail.com

LinkedIn · GitHub · CV

Set in Literata and IBM Plex Mono.

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