Developing a plugin for WordPress

We need a web programmer. It requires writing a WordPress plugin to automatically publish posts via http query.
The remote application will send a request with a specific set of POST parameters, the plugin must add a new entry to the specified blog section.
The publication should contain fields:
- headline;
- text;
- Marks;
- attachment (picture in gif format);
The picture should be added to the text of the record.
The plugin settings should be displayed in the blog management panel.
The plugin should contain a widget for displaying the titles of the last n-entries and links to the publication.