Case study

Postt.aiAI Content Platform for Founders

An AI content platform that writes, designs and schedules LinkedIn and X posts in each founder's own voice.

Role: Lead Developer & Project Manager
Timeline: Jul 2024 - Present
Type: Project I worked on
Stack: TypeScript, React 19 +19

postt.ai

Overview

Postt.ai is Jutsu's content platform for founders who know they should post on LinkedIn and X but never find the time. Instead of generic AI copy, it learns how each founder writes from a few of their own posts and keeps that voice in everything it drafts. A founder can turn one idea into a week of posts, carousels, images and short videos, line them up on a calendar or in a campaign, and let Postt publish them to a personal profile, a company page or X, then pull the results back in. Postty, the built-in copilot, plans launch weeks, searches the web for fresh angles and drafts posts on request. I led engineering and product for Postt, and wrote most of the API (Bun, Hono and MongoDB, with Agenda jobs for scheduling, publishing and analytics) and the AI agent service (the Vercel AI SDK across OpenAI, Anthropic and Amazon Bedrock, plus fal and Runway for images and video), along with a large share of the React app. The app screenshots show a demo account with made-up data.

Highlights

01Publishing and scheduling to LinkedIn profiles, LinkedIn company pages and X
02An AI writer that drafts in the founder's own voice, using writing personas learned from their past posts, with optional web search for fresh topics
03Inline AI edits (shorten, expand, fix grammar, add a hook, a call to action or hashtags) shown as a diff to accept or reject
04Text, image, video, document and carousel posts, with AI image and video generation, Pexels, Unsplash and Canva pickers, and a live LinkedIn preview
05Campaigns that turn one idea, goal and date range into a planned series of posts on a timeline
06A content calendar with month and week views, time slots and a shared calendar for company-page teams
07Daily "Ready Posts" suggested by the AI for each writing persona, waiting on the home page
08Postty, an agentic copilot that reasons, searches the web and drafts LinkedIn posts, with a choice of OpenAI, Anthropic or Bedrock models
09A brand kit and per-channel brand profiles for tone, audience, industries, colours and example posts
10RSS automation that turns feeds into WordPress articles and LinkedIn posts, each on its own schedule
11Per-post LinkedIn and X analytics, posting streaks and a yearly activity heat-map, kept current by background jobs that also publish and retry posts

Gallery

Inside the product

15 screens · click any to enlarge

02The post editor: a prompt, a writing persona and web search on the right, a live LinkedIn preview on the left.

03An AI rewrite shown as a diff against the original, to accept or reject.

04The carousel builder, with AI-written slides and themes.

05The content calendar, with a day's time slots open.

06All posts: drafts, scheduled, published and failed, including AI and campaign posts.

07A published post next to its LinkedIn analytics.

08Campaigns, grouped into ongoing, upcoming and ended.

09A launch-week campaign on its timeline, with a post open for editing.

10Postty, the copilot, planning a launch week and drafting the posts.

11The brand kit: writing personas, content style and a knowledge library.

12RSS feeds that publish to WordPress and LinkedIn on their own schedules.

13Reports: posting streak, queue and a yearly activity heat-map.

14The media library of uploaded and AI-generated images and videos.

15How the pieces fit together, as shown on postt.ai.

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