First of all, the use of an LLC to do such work would not protect you from liability for negligence or intentional misconduct.

To do such work in reasonable security, you would need to inform your employer, in writing, making it plain that for the security of the e-commerce transactions, you would be depending on the security of the third-party. You would also make the extent of your experience in using such technology. Sources on the security of the plugin could also be referenced.

It might well be wise to have an actual written contract, that spells out what you would, and would not, be responsible;e for, in dong this website. In particular such a contract could make it clear that you will be relying on third-party software (which would be named) for the security of the "store" part of the site, and that you could not be responsible for the security of that plugin.

There are various reliable published and online sources for drafts for website development contracts. There should be no need to create one from scratch. Indeed it is better not to try to write such an agreement from nothing. But you could (and might be wise to) have a lawyer review the final draft of any such agreement. That should not be overly expensive.

Such a contract woulds offer much better protection tan the use of an LLC. If you have an LLC it could be used as well, but the protection that gives is from debt liability, not from liability for professional negligence.

First of all, the use of an LLC to do such work would not protect you from liability for negligence or intentional misconduct.

To do such work in reasonable security, you would need to inform your employer, in writing, making it plain that for the security of the e-commerce transactions, you would be depending on the security of the third-party tech. You would also make the extent of your experience in using such technology clear. Sources on the security of the plugin could also be referenced.

It might well be wise to have an actual written contract, that spells out what you would, and would not, be responsible;e for, in dong this website. In particular such a contract could make it clear that you will be relying on third-party software (which would be named) for the security of the "store" part of the site, and that you could not be responsible for the security of that plugin.

There are various reliable published and online sources for drafts for website development contracts. There should be no need to create one from scratch. Indeed it is better not to try to write such an agreement from nothing. But you could (and might be wise to) have a lawyer review the final draft of any such agreement. That should not be overly expensive.

Such a contract woulds offer much better protection than the use of an LLC. If you have an LLC it could be used as well, but the protection that gives is from debt liability, not from liability for professional negligence. It also helps one document business income and expanses if used consistantly, and can be helpful for tax purposes.