Shopify Back-end Developer

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 "