Broster Buchanan are partnered with a quickly growing eCommerce business who are looking for a Backend Integrations Developer with a strong background in e-commerce systems and backend integrations to join their fast-paced, tech-forward software engineering team. This role will focus on the development and maintenance of scalable, cloud-native software solutions that integrate their e-commerce platform with critical business systems including Warehouse Management, Finance, Inventory, and other back-office applications. The role will be based in their Liverpool office with 2 or 3 days onsite and 2 or 3 days remote working per week. On offer is a salary of £55k - £75k + 10% bonus (with plenty of flexibility for the right person). Responsibilities: • Design, develop, and maintain backend integrations between e-commerce systems and ERP/WMS/Finance platforms. • Build cloud-native, containerised applications and services using modern frameworks and design patterns. • Create middleware and intranet applications that streamline internal workflows and communication between distributed systems. • Write clean, maintainable, and efficient code across multiple languages (C#, PHP, Python, JavaScript). • Develop and consume REST APIs, ensuring secure, performant communication between services. • Ensure scalability and resilience in applications handling large volumes of traffic and burst events. • Work collaboratively with cross-functional teams, including DevOps, Infrastructure, and Product, to deliver robust systems. • Leverage observability tools to monitor, alert, and troubleshoot application and integration health. • Stay current on AI-driven software development practices (e.g., GPT-assisted development, Agentic AI workflows) and suggest practical implementations. • Participate in architecture reviews, sprint planning, code reviews, and knowledge sharing. Requirements: • Strong experience in backend systems and technologies, such as .NET 8 or 9, C# or Golang • Experience in various SQL dialects, including MySQL, MSSQL, PostgreSQL • Familiarity with Redis, ElasticSearch and REST APIs • Experience with Windows-based development: services, scheduled tasks, web servers (e.g. IIS) • Experience with containers such as Docker or Kubernetes and Cloud platforms: AWS (preferred), Azure, or GCP • Beneficial to have Magento or other open-source e-commerce platform integration experience • Prior experience building middleware for data sync, order processing, and internal APIs in a multi-system e-commerce environment would be highly beneficial