We are looking for a skilled Backend Developer with strong experience in building and maintaining scalable APIs using Node.js , Express.js , and optionally Next.js . You should have hands-on experience with cloud platforms such as Heroku , AWS , or Azure , strong database knowledge, and the ability to write and maintain unit tests to ensure code quality. Familiarity with Shopify is a bonus but not required. Key Responsibilities Design, develop, and maintain scalable RESTful/GraphQL APIs using Node.js and Express.js . Work with Next.js to support backend and full-stack features. Manage deployment and infrastructure on Heroku , AWS , or Azure . Design and optimize relational or NoSQL databases . Collaborate with frontend developers and project stakeholders to integrate APIs and deliver features. Use Git for version control and participate in code reviews and CI/CD pipelines. Write clean, maintainable, and well-documented code. Unit testing (Optional) Collaborate with Shopify development team or integrate backend with Shopify APIs. Nice to Have Experience working with Shopify or integrating Shopify Admin/Storefront APIs . Familiarity with GraphQL. Experience with authentication flows (OAuth, JWT). Exposure to serverless architectures or microservices. Show more Show less