Freelance Backend Developer at Rough Trade, London/Hybrid, £Contract Rate

We are seeking a freelance developer to adapt our existing bespoke Shopify-to-Erply integration into an installable Shopify app that can support multiple store contexts: owned retail, B2B, and third-party logistics (3PL). The app should be built for long term maintainability and ease of deployment across different Shopify stores.

Objectives

• Convert our current integration into an installable Shopify app.

• Include configuration options that support different operational contexts (retail, B2B, 3PL).

• Ensure the app is scalable and can be managed through our existing infrastructure on Google Cloud.

Tech Stack

• Backend: Python (existing integration codebase)

• Frontend/Shopify App Interface: JavaScript / Shopify Admin Apps

• Hosting/Infrastructure: Google Cloud Platform

Scope of Work

• Design and develop a multi-store-compatible Shopify app based on our existing Python integration including:

  • Products / Variants

  • Orders / Fulfilments / Invoices

  • Inventory

  • Locations

  • Configuration

• Build admin configuration settings within the Shopify app UI to support retail, B2B, and 3PL variations.

• Handle authentication, store-specific settings, and Shopify App Bridge conventions.

• Collaborate with our internal dev team (Product Manager, Backend Developer, Frontend Developer).

• Set up deployment and CI/CD pipeline within GCP for production use.

Deliverables

• Fully functional, installable Shopify app

• Admin UI for managing context-specific settings

• Deployment guide and documentation

• Unit and integration tests

• Developer handover session

Collaboration & Communication

• Weekly standups via Google Meet

• Slack for ad hoc communication

• JIRA for issue tracking and progress updates

• Code review and version control via GitHub

The Ideal Candidate

• Candidate who is available to start immediately

• Strong Python development experience, ideally with ERP integrations

• Shopify app development knowledge (REST/GraphQL API, App Bridge)

• Experience with Google Cloud (Cloud Run, Pub/Sub, Cloud Functions)

• Familiar with scalable architecture and multi-tenant systems

• Comfortable working in a cross-functional agile team

At Rough Trade we value diversity and inclusion across everything that we do. From the records that we sell to the events that we hold, to the incredible people that work in our business every day, we are committed to delivering the best possible experience for everybody.