Principal Software Engineer - Selling Experience

Marks and Spencer; United Kingdom; Remote; GBP 70,000 - 90,000; Full time

Job summary

A leading retail company is seeking a Principal Software Engineer to champion engineering excellence and deliver a seamless online purchasing experience. This role involves leading technical initiatives, mentoring engineers, and driving innovative digital solutions in a dynamic environment. Ideal candidates will have expertise in modern web solutions, clean code practices, and strong leadership skills. Join a company that values inclusion and aims to transform the future of retail.

Benefits

20% colleague discount

Competitive holiday entitlement

Discretionary bonus schemes

Defined Contribution Pension Scheme

Tailored training programmes

M&S Choices portal discounts

Parental and neonatal policies

24/7 Virtual GP access

Charity volunteer day

Qualifications

• Experience implementing web-facing software solutions across multiple devices.
• Strong understanding of quality assurance, testing quadrants, and testing pyramid.
• Ability to lead senior engineers to desired outcomes.

Responsibilities

• Lead technical excellence from design to launch of product features.
• Drive technical direction and influence overall strategy.
• Champion engineering excellence at M&S.

Skills

Web-facing software solutions

Clean code and design patterns

Information Security

System design conversations

Quality assurance and testing

Cloud computing

Observability and Reliability

Performance Engineering

Reliability testing

Tools

New Relic

Dynatrace

Kubernetes

Job description

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Principal Software Engineer - Selling Experience

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Client:

Marks and Spencer

Location:

United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Reference:

e8a3397d4d20

Job Views:

6

Posted:

12.08.2025

Expiry Date:

26.09.2025

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Job Description:

You will be championing Engineering excellence in a key area for M&S, that enables our on-line customers to find, evaluate and buy products. As the Principal Engineer for Selling Experience, you will support multiple teams in providing an engaging, simplified, transparent and inspirational digital experience that delivers the best online purchasing experience in the UK and Irish market. This exceptional web channel attains, retains and drives frequency of customers and aligns with the broader omni-channel experience to deliver the M&S unified customer commerce ambition.

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…

• After completing your probationary period, you’ll receive 20% colleague discount across all M&S products and many of our third-party brands for you and a member of your household.
• Competitive holiday entitlement with the potential to buy extra holiday days!
• Discretionary bonus schemes awarded based on how you achieve your personal objectives and our performance as a business.
• A generous Defined Contribution Pension Scheme and Life Assurance.
• A dedicated welcome to our teams with a tailored induction and a wide range of training programmes to develop your skills.
• Amazing perks and discounts via our M&S Choices portal to maximise your financial and personal wellbeing.
• Industry-leading parental, adoption and neonatal policies, providing support and flexibility for your family.
• Access to a fantastic range of wellbeing support for all colleagues including access to our 24/7 Virtual GP and PAM Assist to support you and your family.
• A charity volunteer day to support a charity or cause you're passionate about through a dedicated day away from work.
  

What you’ll do

Your key accountabilities will include:

• Lead technical excellence from design to operations and launch of core product features or strategic programmes
• Drive technical direction and influence our overall strategy informing decisions on both Technology and Product investments as well as teams’ setup
• Champion Communities of Practice to help establish engineering excellence at M&S
• Lead by example via contributions to our engineering ecosystem
• Pioneer and promote methodologies like clean code and clean architecture
• Advocate for engineering productivity, delivery quality and operational excellence through a continuous ecosystem
• Drive DevOps practices to automate the Product development life cycle and ownership demeanour
• Partner with Engineering, Technology and Product leadership to ensure strategies align
• Develop the best and mentor other engineers across the entire landscape
• Promote effective innovation across all of engineering
• Advocate and strategize for continuous industrialisation and product-minded tech capabilities
• Inspire ideas to foster purpose and mastery to engineering teams, leading them towards autonomy and maturity
• Amplify engineering teams by efficiently unblocking them with direction, leading upward, and establishing alignment
• Raise the profile of MS Tech through public content and contribution/creation into open-source technology
• Support recruitment, onboarding and internal and external brand outreach activities
  

Who you are

Your skills and experience will include:

• Experience in implementing solutions using modern, web facing software solutions that provide the best possible experience across multiple devices
• Specialist in clean code and implementation of design patterns for common problems.
• Depth of knowledge in Information Security, you can design, quality review and quality assure solutions and services with security controls embedded.
• Confident driving system design conversations, building systems characterised by high levels of risk, impact, and business or technical complexity
• Strong understanding of quality assurance, testing quadrants and the testing pyramid, and how to apply them
• Ability to lead senior engineers and technical customers to a desired outcome, without prescribing it
• Authoritative skills at cloud computing (network, security, serverless, Kubernetes etc) and automation
• Experience with implementation of Observability and Reliability using market technologies (.: New Relic, Dynatrace)
• Good experience with Performance Engineering (load testing, derivations, tuning, core web vitals, page speed
• Expertise in reliability testing

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. Join us and make change happen.

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 work together to win together.

If you feel you'd benefit from any support or reasonable adjustments during any stage of the recruitment process, please don’t hesitate to let us know when completing your application. This information will be picked up by our team, so we can try and put steps in place to help you be at your best through this process.

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