Senior Backend Engineer – E-commerce Integrations

For one of our clients in we are looking for an experienced Software Engineer / Backend Integration Engineer. In this role, you will work on the development and expansion of e-commerce platform integrations within an existing product and engineering team.

A key focus of this assignment is building integrations with Shopify, so hands-on experience with developing Shopify applications or integrations is important. You will take ownership of technical implementations and contribute to the full development process, from technical design through production delivery.

Responsibilities:

• Design and develop integrations between an internal checkout platform and Shopify.

• Contribute to integrations with additional e-commerce platforms such as WooCommerce and Magento.

• Develop and maintain backend services using Kotlin and/or Java with Spring Boot.

• Work within a distributed microservices architecture and integrate with internal and external APIs.

• Translate Shopify platform capabilities, APIs, webhooks and checkout flows into robust integration solutions.

• Collaborate with engineers, product managers and other stakeholders to define and deliver integration requirements.

• Contribute to technical design decisions and ensure solutions are scalable, maintainable and production-ready.

• Troubleshoot integration issues across multiple services, merchant platforms and third-party APIs.

• Support the testing, rollout and production adoption of new integrations.

Profile:

• At least 3 years of professional experience with Kotlin and/or Java.

• Strong experience with Spring Boot and building backend services.

• Good knowledge of microservices and distributed system architectures.

• Proven hands-on experience developing Shopify applications or integrations, including working with Shopify APIs and webhooks.

• Experience within the e-commerce and/or payments domain is a strong plus.

• Experience with WooCommerce and/or Magento is a plus.

• Experience with React and TypeScript is a strong plus.

• Knowledge of PHP is a plus.

Additional Information:

• Duration: 6 months with possibility of extension (expected total duration approximately 1 year)

• Start date: As soon as possible

• Hours: 32–40 hours per week

• Location: Utrecht / Hybrid

• On-site: Thursday and Friday