Add Email Marketing module to our app MERN stack

We are developing a microservices based MERN Stack app. Need help with Sendgrid API. Ideally looking for someone who can build marketing automation features such as drip campaigns. Must have experience with developing marketing features. You must submit examples of similar work you may have done with your bid. Please do not send messages if you do not have experience in marketing platforms development. Must have experience with GraphQL, MERN