Senior Java Backend Engineer — Order Management (Hybrid)

Marks and Spencer; Greater London; Hybrid; GBP 100,000 - 140,000; Full time

Job summary

Marks & Spencer is seeking a Senior Software Engineer to evolve the Order Management platform, powering order fulfilment from checkout to delivery, amendments, cancellations, and returns. The role focuses on solving complex fulfilment challenges and modernising enterprise systems within one of the UK’s largest retail operations.

You’ll design and own features end-to-end, drive improvements in architecture and automation, and mentor engineers while collaborating with product managers and

Qualifications

• A senior software engineer with deep backend engineering experience and a proven track record of delivering reliable, scalable systems in complex enterprise environments.
• Experienced with IBM Sterling Order Management and the challenges associated with large-scale ecommerce fulfilment operations.
• Strong Java engineer with experience designing and developing enterprise services, APIs, and integrations across distributed systems.
• Passionate about software quality, maintainability, testing, and long-term sustainability.
• Experienced in CI/CD practices, observability, production support, and operational excellence.
• Comfortable designing systems with resilience, recoverability, monitoring, and supportability in mind.
• Pragmatic and commercially aware, capable of balancing technical ambition with business priorities and customer outcomes.
• A collaborative engineer who enjoys working across disciplines, raising standards, and helping teams continuously improve.

Responsibilities

• Design, build, and evolve order management capabilities that support seamless customer fulfilment journeys across checkout, fulfilment, returns, amendments, and cancellations.
• Own features end-to-end, taking responsibility for solution design, development, testing, deployment, and production support.
• Help shape the technical direction of the Order Management platform, driving improvements in architecture, integration patterns, automation, reliability, and security.
• Champion engineering excellence through clean, maintainable, and well-tested code, promoting best practices across teams.
• Drive operational excellence by designing systems with observability, monitoring, resilience, and supportability at their core.
• Use tools such as Dynatrace to improve platform visibility, monitoring, and alerting capabilities.
• Collaborate closely with Product Managers, Engineering teams, and Fulfilment stakeholders to solve complex business challenges and accelerate delivery outcomes.
• Support and mentor engineers through coaching, knowledge sharing, code reviews, and technical guidance.
• Contribute to the continuous improvement of engineering standards, tooling, and ways of working across the wider organisation.

Skills

Backend engineering

Java

CI/CD practices

Observability

Production support

Tools

IBM Sterling Order Management

APIs integration

Job description

Marks & Spencer is seeking a Senior Software Engineer to evolve the Order Management platform, powering order fulfilment from checkout to delivery, amendments, cancellations, and returns. The role focuses on solving complex fulfilment challenges and modernising enterprise systems within one of the UK’s largest retail operations.

You’ll design and own features end-to-end, drive improvements in architecture and automation, and mentor engineers while collaborating with product managers and