PostMatrix

Generate, schedule, and auto-publish social media content across all platforms — end to end.

Next.js 14PostgreSQLOpenAI GPT-4oDockerRedisBullMQ

postmatrix.app

Overview

Social media management for small businesses is time-intensive and inconsistent. PostMatrix removes the bottleneck by automating the entire content pipeline — from brief to published post — without the user needing to touch Canva or a scheduler.

The Problem

Small business owners were spending 5–10 hours per week on social media — writing captions, creating graphics, manually publishing at optimal times across four platforms. They needed the whole workflow automated, not just one step.

The Solution

Users write a content brief; GPT-4o generates platform-optimized captions and kie.ai generates matching visuals. A BullMQ-backed scheduler queues posts for optimal publish times and fires platform API calls automatically. Full Docker deployment on Hostinger VPS with Nginx.

Key Features

AI Content Generation

GPT-4o creates platform-specific captions — character limits, hashtag density, and tone adapted per platform from a single brief.

AI Image Generation

On-brand images generated automatically via kie.ai — no Canva, no designer, no manual asset creation.

Multi-Platform Publishing

Posts published to Instagram, Facebook, X, and LinkedIn via official APIs on a configured schedule.

BullMQ Job Queue

Redis-backed BullMQ handles async scheduling, automatic retries on API failures, and per-platform rate limit compliance.