Senior Software Engineer - Payment Capabilities

M&S Careers; City of Westminster; On-site; GBP 90,000 - 130,000; Full time

Benefits offered by this job

20% colleague discount across M&S

Discretionary bonus schemes

Defined Contribution Pension Scheme

Wellbeing support

Learning and development opportunities

GymSave perks

Shareholder opportunities

Volunteer day

Job summary

Marks & Spencer is seeking a Senior Software Engineer to advance its Payments Platform, powering secure online payments across M&S digital channels. You will design and build high-volume, resilient backend services and APIs, owning features end-to-end, from design to deployment and production support.

The role emphasizes performance, observability, and engineering excellence within a fast-paced ecommerce environment.

Qualifications

• Senior backend software engineer with deep experience delivering scalable, resilient systems.
• Strong Java engineering expertise for enterprise services and APIs.
• Experience designing systems serving large customer populations with high availability and performance.
• Experience with ecommerce platforms or highly transactional systems is advantageous.
• Commitment to software quality, testing, maintainability, and engineering best practices.

Responsibilities

• Design, build and evolve payment services and capabilities across M&S digital platforms.
• Develop resilient backend services, APIs, and integrations supporting millions of payment journeys.
• Own features end-to-end: design, develop, test, deploy and production support.
• Shape the technical direction of the Payments platform for performance, resilience and cost.
• Promote engineering excellence with clean, well-tested code and best practices.
• Design systems with observability, monitoring, and maintainability at their core.
• Utilise Dynatrace to improve platform visibility and reliability.

Skills

Java

Backend

Distributed systems

CI/CD

Observability

Tools

Dynatrace

Job description

We’re looking for a Senior Software Engineer to play a pivotal role in evolving M&S’s Payments Platform. This team provides the critical software capabilities that power online payments across the business, enabling millions of customers to complete purchases securely, reliably, and seamlessly across all M&S digital channels.

Your “customers” are product teams, engineers, business stakeholders, and ultimately millions of M&S customers — and your mission is to make them faster, more effective, and more confident through scalable services, resilient integrations, and exceptional engineering practices.

This is a role for an engineer who is excited by building high-volume transactional systems, solving complex payment challenges, and modernising technology platforms that sit at the heart of M&S’s online growth ambitions.

About the Team

Our engineering teams enable product, engineering, and business teams to deliver customer experiences with speed and confidence. We create reliable, scalable, and secure platforms rooted in strong engineering standards, automation, and continuous improvement.

You will join the Payments team, helping to modernise and evolve critical payment capabilities.

The Payments team plays a critical role in supporting M&S’s online growth strategy, ensuring customers can purchase with confidence through secure, scalable, and reliable payment experiences.

What You'll Do

• Design, build, and evolve payment services and capabilities that enable seamless customer transactions across M&S digital platforms.
• Develop resilient backend services, APIs, and integrations that support millions of customer payment journeys every year.
• Own features end-to-end, taking responsibility for solution design, development, testing, deployment, and production support.
• Help shape the technical direction of the Payments platform, balancing performance, scalability, resilience, security, and cost through modern engineering practices.
• Champion engineering excellence through clean, maintainable, and well-tested code, helping establish best practices across engineering teams.
• Drive operational excellence by designing systems with observability, monitoring, resilience, and supportability at their core.
• Utilise tools such as Dynatrace to improve platform visibility, monitoring, alerting, and service reliability.

Who You Are

• A senior backend software engineer with deep experience designing and delivering scalable, resilient systems in complex enterprise environments.
• Strong Java engineering expertise with experience building enterprise services, APIs, and integrations across distributed systems.
• Knowledge in designing systems that serve large customer populations while maintaining high availability, performance, and security.
• Work with ecommerce platforms, payment services, or highly transactional systems is advantageous.
• Passionate about software quality, testing, maintainability, and engineering best practices.
• Strong understanding of CI/CD, observability, production support, and operational excellence.

What's in it for you

Being a part of M&S is exactly that – playing your part to bring the magic of M&S to our customers every day. We’re an inclusive, dynamic, exciting, and ever-evolving business built on doing the right thing and bringing exceptional quality, value, service to every customer, whenever, wherever, and however they want to shop with us.

Here are some of the benefits we offer that make working for M&S just that little bit more special…

• 20% colleague discount across M&S products and selected third-party brands.
• Competitive holiday entitlement with the potential to buy extra holiday days.
• Discretionary bonus schemes awarded based on personal and business performance.
• A generous Defined Contribution Pension Scheme and Life Assurance.
• A tailored induction and extensive learning and development opportunities.
• Amazing perks and discounts via the M&S Choices platform, including GymSave and the opportunity to become an M&S Shareholder.
• A dedicated charity volunteer day to support a cause you're passionate about.
• Access to a fantastic range of wellbeing support, including a 24/7 Virtual GP and wellbeing services.

Everyone’s Welcome

We are ambitious about the future of retail. We’re disrupting, innovating, and leading the industry into a more conscientious, inspiring digital era. We’re transforming how we work together and offering our most exciting opportunities yet.

Marks & Spencer strives to be an inclusive organisation, trusted and admired by our colleagues, customers, and suppliers.

We are committed to building diverse and representative teams, where everyone can bring their whole selves to work and be at their best. We support each other and win together.

If you’d benefit from any support or reasonable adjustments during any stage of the recruitment process, please let us know when completing your application.