Job Description
We are looking for a Senior Shopify Backend Developer to support the delivery of mid to large-scale ecommerce projects, often in headless architectures and involving multiple integrations (ERP, PIM, middleware).
You will play a key role in designing and implementing backend services and Shopify apps, working closely with architects, Product Owners, Business Analysts and frontend teams.
Job Description
* You handle complex problems without overcomplicating things.
You break them down and keep moving forward.
* You take ownership of what you build.
From idea to release, you make sure features actually work in practice.
* You work well within existing systems.
Architecture, integrations and middleware don’t slow you down, you know how to improve them.
* You keep things practical.
No unnecessary complexity, just solid solutions that get the job done.
Shopify Backend Development
* Develop and maintain custom apps on Shopify
* Work extensively with:
o Admin API (GraphQL)
o Webhooks (event-driven flows)
o Metafields & custom data structures
* Implement backend logic using Shopify Functions and Checkout extensibility
Integration & Data Flows
* Design and implement integrations with:
o ERP systems (SAP, Odoo, MS Dynamics, …)
o PIM systems
o POS (kassa systems)
Backend Engineering
* Build scalable backend services using:
o TypeScript / JavaScript
o Node.js
o Work with frameworks such as NestJS or similar structured backend frameworks
Qualifications
Must-have
* 5+ years in backend development
* Proven experience with Shopify APIs & app development
* Experience in:
o Remix, Polaris, Liquid, Storefront API, Admin API, GraphQL, Shopify APP extensions, Shopify APP, Typescript, Shopify Flow basics, Shopify configuration
* Experience with event-driven architectures (webhooks, async processing)
Nice-to-have
* Experience with NestJS, React Router 7, PHP, Tailwind CSS basics, Hydrogren theming
* Experience in headless commerce architectures
* Exposure to B2B ecommerce (pricing, catalogs, workflows)
* Strong problem solver in complex environments
* Able to design and deliver features end-to-end
* Comfortable working with existing architecture & middleware
* Pragmatic mindset (not over-engineering)
Additional Information
* Highly competitive salary package
* Hospitalization insurance
* Company car with charging card
* Meal allowance & monthly allowance
* Phone subscription and laptop
* Flexible cafeteria plan
* 13th month salary and holiday allowance
* Access to multiple offices across Belgium
* Hybrid working model with 2 to 3 days remote, depending on client meetings and pitches
* International collaboration across 12 countries, working with diverse teams and markets
* A high-performance environment where initiative and ownership are expected and recognized
* Direct exposure to senior stakeholders and decision-makers, both internally and on the client side "