Marketing Content Manager

A back office for campaigns, banners and approvals

My idea, my build, now in daily use at Energycom Ltd., a solar energy company in Croatia. Their campaign plan was an Excel sheet, the banners sat in shared folders and approvals went by email. In 2026 I designed and built the whole thing myself, with AI as my coding assistant.

Company: Energycom Ltd., Croatia
My role: Idea, product design and build, with AI as my coding assistant
Platform: Responsive web app
Status: Online, in daily use at Energycom

Overview

The Marketing Content Manager keeps campaigns, banners and approvals in one place. A campaign has a code, a status, dates, people and one or more channels. Each banner has versions, an approval state and a rating.

Five roles decide who can do what, from Administrator down to a read-only Viewer. The company's marketing team uses it.

The challenge

Marketing people are in this all day, and they need to see the banner, not a row of text about it. So the banner sits in every table row, uncropped, and the rest of the page stays quiet: muted surfaces, one accent color, a monospace face for codes and counters.

One campaign often runs on several channels at once. It used to be one row per channel, and the totals counted it twice. Now a campaign has a list of channels, ticked in a checkbox grid.

My role

This was my idea, and there was no one else on it. I did the product, the design, the build and the tests, with AI as my coding assistant: it wrote code from the rules I gave it, and I made the calls.

The work

Six screens, dark theme, desktop and phone, and the main flows. The banners in the screens are blurred, and some of the data is in Croatian.

Two dark-mode screens: a campaign page header with its code, status, dates and rating, and in front the banners section with cards showing version, approval state and rating, and the Send back for rework form open

A campaign and its banners

Every banner is a card with its version, approval state and rating. A manager approves it or sends it back with a note, a person and a deadline. Restoring an old version makes a new one, so nothing gets overwritten.

Two dark-mode screens: the campaign list with channel labels, and in front the new-campaign form with the channels as a grid of checkboxes

One campaign, several channels

The new-campaign form, with the channels as a checkbox grid. That many options don't fit a dropdown, and nobody should have to Ctrl-click.

Two dark-mode screens: the Tasks list grouped by status, and in front the same list filtered to overdue Banner rework tasks

Tasks and rework

Tasks grouped by status, with filters for campaign and due date. When a reviewer sends a banner back, the app creates the rework task and assigns it.

Two dark-mode screens: the banners list with status filters, and in front the Trash page with deleted campaigns, their purge dates and Restore and Delete permanently buttons

Archive first, then trash

Nothing goes into the archive unrated. Deleting takes two steps: archive, then 30 days in Trash, where it can still be restored.

Two dark-mode screens of the Overview: the table view behind, and in front the cards view with larger banner previews

Table or cards

The same Overview two ways: a table when you scan the plan, cards when you want the banners bigger. Both run on the same tokens, so the light and dark themes are one set of values each, nothing patched by hand.

Two phone screens in the dark theme: the Overview with stacked counts and the campaign table, and the Tasks list with its filters

On a phone

Columns drop by priority as the screen narrows, and the banner keeps its width. A text-size switch makes the type bigger without breaking the layout.

Two boards of flow diagrams: the campaign lifecycle and banner approval on one, tasks and role permissions on the other

How it flows

The main flows, drawn from the app: a campaign's life from the form to the trash, a banner's path through review, tasks, and who may do what. Every state has a way out: an unrated campaign can't be archived, a deleted one waits 30 days in Trash, and a sent-back banner comes back as a new version.

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