Root Systems is seeking a Payments Integration Developer to build out their payment integration capabilities. The role focuses on implementing and optimizing payment processing using Stripe and Wise APIs, designing secure and scalable payment architectures, and ensuring compliance with industry standards. The tech stack includes PHP and Python for backend development and React for frontend. This position offers an opportunity to have significant impact at a startup while working with modern payment technologies and maintaining high security standards. The company provides excellent benefits including work-life balance, competitive compensation, and relocation assistance to Athens, Greece.