I want to accept Klarna and Stripe payments on my website

I need a developer to help me incorporate payment processing into my website. Specifically, I want to accept both Klarna Payments and Stripe Payments for one-time transactions. This will require the creation of an external API and/or payment gateway to facilitate the transaction. I'd like someone with experience integrating payment methods into websites to help me make this happen.
My website is www.jobtask.co.uk