Case study

AImajin: Multimodal AI Workflow Proof

AImajin is applied AI media R&D from Frumu, built to explore image and video generation workflows, prompt orchestration, creative automation, review loops, and polished user-facing AI interfaces.

Product site View on Google Play

Problem

AI media generation is not a single prompt call: useful systems need prompt refinement, provider orchestration, media storage, review loops, and usable artifacts.
Image and video jobs are long-running and spiky, so the workflow needs real-time progress, resilient retries, and clear user feedback.
A polished AI product requires secure auth, billing/subscriptions, reliable job processing, and cost-aware infrastructure.

Solution

Built AImajin as a React Native (Expo) application for AI image editing/generation and AI video workflows.
Implemented a Django backend (DRF + ASGI/Channels) with async job processing (Celery + Redis).
Used Nginx as a reverse proxy for TLS termination and WebSocket proxying.
Integrated Supabase (auth + Postgres) and RevenueCat (IAP + webhooks).
Integrated Cloudflare R2 for media storage and Cloudflare Vectorize for vector search.
Integrated multiple AI providers (Replicate, OpenRouter, FAL, Gemini) behind a single backend interface.
Instrumented error tracking with Sentry (backend + workers).

Architecture

Results

Shipped to Google Play

Production app with 100+ downloads and 4+ star rating

Real-time generation UX

WebSocket progress updates for AI jobs taking 10–60s

Sub-£50/month hosting

Cost-aware infrastructure on Hetzner with Docker Swarm

RevenueCat integrated

Subscription billing with webhook-driven entitlements

How this maps to client use cases

Multimodal business workflows where images, video, or creative assets need to move from input to generation to reviewable output.
AI-assisted content generation systems that require prompt orchestration, approval loops, reusable pipelines, and media processing.
Teams moving from prototype image/video scripts to maintainable backend services with queues, monitoring, storage, and cost controls.