Senior Developer, Back End (New Marketplace Development)

Senior Developer, Back End (New Marketplace Development)

We are looking for a

Senior Backend Developer

with strong expertise in

Node.js

and hands-on experience in

MedusaJS , or a strong willingness and ability to ramp up quickly on this headless commerce framework. In this role, you will architect and implement scalable backend systems for modern eCommerce experiences. As part of our product engineering team, you will be responsible for designing, developing, and maintaining high-performance APIs, integrating third-party services, and optimizing system performance while ensuring a seamless and secure shopping experience. Key Responsibilities Design, develop, and maintain backend services using

MedusaJS

and

Node.js Customize and extend core Medusa functionality (e.g., product catalog, order management, carts, etc.) Integrate external services (e.g., payment gateways, shipping providers, CMSs) Implement scalable APIs and microservices to support frontend teams Collaborate closely with frontend developers, designers, and product managers Ensure code quality, security, and performance through reviews, testing, and CI / CD practices Maintain and optimize database models (PostgreSQL preferred) Monitor and troubleshoot production systems Contribute to architectural decisions and roadmap planning Required Skills & Experience 1+ year of experience working with

MedusaJS

or similar headless commerce frameworks (e.g., Shopify Hydrogen, Commerce.js, Vendure) Strong understanding of

RESTful APIs

event-driven architecture

, and

microservices Experience with relational databases (PostgreSQL, MySQL) Familiarity with containerization and cloud environments (Docker, AWS, etc.) Good knowledge of software design patterns and principles (SOLID, DRY, etc.) Excellent debugging, optimization, and problem-solving skills Familiarity with CI / CD workflows, Git, and agile methodologies Nice to Have Experience with Medusa plugins, custom modules, or extending Medusa’s core services Familiarity with GraphQL Contributions to open-source projects (especially MedusaJS) Understanding of eCommerce concepts (PIM, OMS, payment flows, etc.) Experience with Headless CMSs (e.g., Strapi, Sanity)

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