Senior Software Engineer — Architect & Scale Systems

Marks and Spencer; Greater London; On-site; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Colleague discount

Holiday allowance

Bonus schemes

Pension & life assurance

Induction & training

Exclusive Choices portal

Family policies

Wellbeing support

Volunteer day

Job summary

Marks & Spencer is seeking a Senior Software Engineer to join the Software Engineering team in London, helping build scalable solutions for millions of customers and thousands of colleagues. You will lead backend-focused development, design robust architectures, and drive delivery with a strong DevOps mindset in a fast-moving environment.

You will collaborate across disciplines, influence technical standards, review code, and contribute to complex initiatives that shape the future of our digital

Qualifications

• Strong experience in a modern backend-focused technology environment and software engineering best practices.
• Expert understanding of software development principles and patterns, including MVC, SOLID, DRY and KISS.
• Solid expertise using distributed version control systems such as Git.
• Proficiency with Test Driven Development (TDD), Behaviour Driven Development (BDD) and non-functional testing approaches.
• Strong DevOps mindset with experience operating services and solutions using a "you build it, you run it" approach.

Responsibilities

• Writing, testing and debugging code for complex features, distributed systems and legacy migrations, while helping optimise deployment pipelines.
• Providing technical leadership, guidance and estimation on complex, high-impact projects, ensuring successful delivery of software solutions.
• Contributing to architectural and design decisions that align with business requirements, long-term technology strategy and engineering standards.
• Reviewing code and providing constructive feedback to ensure maintainability, quality and adherence to technical standards.
• Collaborating with a broad range of stakeholders, including senior leaders, engineers and external partners, while contributing to engineering communities of practice.

Skills

Backend experience

MVC patterns

SOLID principles

GIT

TDD/BDD

DevOps mindset

Tools

GitHub Actions

Figma

MDM

Gradle

Job description

Marks & Spencer is seeking a Senior Software Engineer to join the Software Engineering team in London, helping build scalable solutions for millions of customers and thousands of colleagues. You will lead backend-focused development, design robust architectures, and drive delivery with a strong DevOps mindset in a fast-moving environment.

You will collaborate across disciplines, influence technical standards, review code, and contribute to complex initiatives that shape the future of our digital