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