About The Role

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: 
Admin API (GraphQL) 
Webhooks (event-driven flows) 
Metafields & custom data structures 
Implement backend logic using Shopify Functions and Checkout extensibility

Integration & Data Flows 

Design and implement integrations with: 
ERP systems (SAP, Odoo, MS Dynamics, …) 
PIM systems 
POS (kassa systems)

Backend Engineering 

Build scalable backend services using: 
TypeScript / JavaScript 
Node.js 
Work with frameworks such as NestJS or similar structured backend frameworks

Must-have  

5+ years in backend development 
Proven experience with Shopify APIs & app development 
Experience in: 
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) 
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