Job Specifications
We're currently working with our client to seek an Integration Engineer to design and build the Middleware layer connecting Shopify with enterprise Back End systems such as OMS, ERP, and WMS. This role focuses on technical integration and data flow rather than Front End or theme development. You'll work closely with their Back End engineers (primarily Java-based) to ensure robust, scalable, and observable data exchange between Shopify and other platforms.
This is a 6+ month contract position paying £400 per day outside IR35 with 3 days onsite in Paddington, London
Responsibilities:
Develop and maintain custom Shopify app logic and Middleware services for system-to-system integration.
Design and implement data flows using REST/GraphQL APIs, webhooks, and event-driven patterns (eg Kafka).
Define and manage data contracts, schema mappings, and transformation logic between Shopify and Back End systems.
Collaborate with Back End engineers to design integration endpoints, manage authentication, and handle errors.
Implement observability and monitoring for integration APIs (using tools like Dynatrace, New Relic, or Azure Monitor).
Troubleshoot and optimise data exchange processes across multiple systems.
Support testing, validation, and refinement of end-to-end integration flows.
Experience required:
Focus: Architecture, API design, mentoring, delivery - Shopify experience
Core Skills: Backend Development (Micronaut preferred): Java, Gradle, REST & Kafka scaffolding, Health checks
API Design & Integration: OpenAPI/AsyncAPI specs, Shopify integration patterns
Testing & Quality: Unit tests, code coverage, mocking strategie, Contract testing, test data generation
Architecture & Patterns: Domain-driven design, event-driven architecture, Reusable components (eg, Catalogue Validator)
Dev Standards & Governance: Linting, formatting, secure coding practices.
About the Company
La Fosse: Empowering people and businesses to thrive in a tech-driven world We are La Fosse. We join forces with ambitious businesses to build unstoppable teams. From classroom to boardroom, we connect the right people with the right opportunities through our four specialised services: La Fosse Recruitment: We place high-performing talent across the UK and beyond - from C-suite to entry level, management to technical roles. La Fosse Executive: We deliver exceptional technology leadership talent through Executive Search and I...
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