Built a Trello Power-Up as a non-developer — anyone else tried this?

Question

Hi Trello community 👋

I'm a graphic designer and 3D artist. I use Trello every day for project management, and for a long time I had one specific frustration — I'd write a comment at 10pm knowing it should go out Monday morning at 9am. There was no native way to do that. Every alternative I found was either too expensive, required Zapier, or needed a separate login.

So I built one myself. PrimeScheduler is a Trello Power-Up that lets you schedule card comments to send automatically at the right time — directly from the card, without leaving Trello.

The honest truth: I'm not a developer. I'm a designer who knows his way around Git and can read code, but I'd never built a backend service or published anything to a marketplace before.

Here's what made it possible:

* Claude (AI) — pair programmed the entire thing with me, from architecture to edge cases
* Upstash — serverless Redis for storing tokens + QStash for scheduling the actual comment delivery
* Vercel — serverless functions for the backend, zero infrastructure to manage
* Paddle — handles all payments and VAT globally as Merchant of Record
* GitHub Pages → Vercel — started on GitHub Pages, moved to Vercel when Trello required CSP headers

The Trello review process was thorough — CSP headers, GDPR compliance polling API, console errors — but the team was helpful throughout.

The Power-Up is free for the first 5 comments, then $4.99/month or $47.90/year for unlimited.

If you've ever wished you could schedule a Trello comment, give it a try: 👉 https://prime-scheduler.vercel.app

Happy to answer any questions about the build process!

Treezy-nikee · Accepted Answer

Massive respect for shipping this. I’m in a similar lane building products without a CS background and that gap between having an idea and building something real has gotten way smaller. What helped me most was reading real Power Up code, using AI to understand changes instead of just copying, and keeping the first version painfully small so it works before it looks good. The iframe model and Trello API can be weird at first, but once that clicks it gets easier. Curious what your Power Up does, a 3D artist’s take on project management sounds interesting.

Oleksandr · Accepted Answer

Hi Vašek,

When building Power-Ups with AI, security can be one of the hardest things to evaluate without a development background.

AI can write code that works, but unless you explicitly ask it to review security, it may choose the simplest implementation. It is easy to miss tokens being passed in URLs, secrets appearing in logs, overly broad permissions, or sensitive data being stored incorrectly.

It is also important to assume that some users will modify URLs and request parameters to try to access data belonging to other users on your server.

How did you approach security checks for PrimeScheduler?