Backend System Developer

Backend Systems Developer - Build the integrations that keep a high-growth digital business moving.

Salary: £40,000 - £60,000

Location: Hybrid (3 Days - Runcorn)

About the Opportunity

We're partnering with an ambitious technology-driven organisation that's investing heavily in its engineering capability. They're looking for an experienced Backend Systems Developer to help build and enhance the integrations that sit at the heart of a large-scale digital platform.This is an opportunity to work on business-critical systems where reliability, scalability and performance genuinely matter. You'll be developing the services that connect customer-facing applications with warehouse, finance and operational platforms, ensuring millions of data points move accurately and efficiently every day.If you enjoy solving complex integration challenges, building resilient backend services and working in a collaborative engineering environment, this could be an excellent next step.

What You'll Be Doing

Designing and developing backend integrations between digital platforms and core business systems including warehouse, ERP and finance solutions. Building scalable middleware to support order processing, inventory synchronisation and real-time data exchange. Developing modern cloud-native services using clean, maintainable architecture. Creating and maintaining REST APIs and event-driven integrations across multiple business systems. Implementing queue-based processing for high-volume asynchronous workflows. Improving resilience through retry logic, circuit breakers and fault-tolerant design. Monitoring system performance and proactively identifying opportunities to improve reliability and scalability. Collaborating with engineers, product teams and operational stakeholders to deliver high-quality solutions. Contributing to engineering best practice through code reviews, mentoring and knowledge sharing.

What We're Looking For

Essential

Around 4+ years' commercial experience in backend software development using a strongly typed language. Experience integrating business-critical platforms with ERP, warehouse management or finance systems. Strong SQL skills, including performance optimisation and database design. Solid understanding of software architecture principles including SOLID, Clean Architecture and Domain-Driven Desig...