Principal Software Engineer - Selling Experience

Team
Digital & Tech
Store
London Support Office
Location
London, Greater London
Contract type
Permanent
Position type
Full Time
Salary
Competitive + Benefits
Closing date: 26th June 2025

How We Hire

Everyone is welcome at M&S. No exceptions. It’s your background, abilities and differences that make you, uniquely you. And when you’re part of M&S, that individuality has the potential to make waves.

About the role

This section tells you all you need to know about the position and its responsibilities, outlining everything we hope to see in a successful candidate.

Summary
Principal Software Engineer – Selling Experience Why Digital & Tech at M&S We're changing the way we do things, and putting industry leading innovation at the heart of how we operate; we need a stellar engineering team to make it happen. You'll be joining one of the most iconic brands in the UK on its most exciting cycle yet. We're more integrated and product led in our tech teams than ever before: learning, changing, and adapting constantly, with millions of people benefiting from your work every single day.
All the details

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.

The Product

We have a genuine ambition to become engineering first, building and operating an elite digital platform. We are looking for people to join our community of engineers to support this transformation, build a modern digital ecosystem.

Scope:

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.

You will be responsible for:

  • Optimising the M&S on-line Web Experience across all device types, as well as SEO
  • Leading teams in delivering best-in-class engineering solutions
  • Seeing opportunities to improve the efficiency of the team through technology and ways of working, and working with teams to make these a reality
  • Championing an experimentation lead culture, driving experimentation across all teams.
  • Leading maturity to Elite Dora for all products in the Browse & Select area
  • Leading Engineering Excellence and creating culture of innovation.
  • Making use of Platforms in order to maximise the value delivered by teams

What you’ll do

The Principal Software Engineer role is the embodiment of ‘solving problems through technology’ with key responsibilities as follows:

  • 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:

  • 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 (e.g.: New Relic, Dynatrace)
  • Good experience with Performance Engineering (load testing, derivations, tuning, core web vitals, page speed etc.)
  • Expertise in reliability testing

Working for Us Means

  • Hybrid Working
  • Industry leading pension of up to 12% M&S contribution
  • Bonus up to 40%
  • 20% discount on M&S products
  • Up to 2 weeks working abroad
  • Learning days once a month, Tech/Ed days once a quarter and Hackathon every other quarter
  • A range of wellbeing support (including free counselling and a virtual GP for you and immediate family)
  • 25% off gym memberships, access to online fitness classes and discounts for complementary health services, such as nutrition and lifestyle coaching

M&S is ready to push boundaries to lead the industry into a greener, speedier, more inspiring digital era. That’s why we’re revolutionising how we work. Marks & Spencer aims to be an inclusive organisation, trusted and admired by our colleagues, customers and suppliers. Join us and make an immediate impact. We are committed to an active Inclusion, Diversity and Equal Opportunities Policy, which starts with our recruitment and selection process. We are happy to talk flexible working and ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process.

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.

#LI-Hybrid

Meet the Team

digital_thumbnail.jpg
A group of colleagues gathered around a table, smiling and discussing work with laptops open in a modern office setting.

Being an in-person business

We're at our best when we're close to customers, and for many of us at M&S, that means working in store every day.

To stay close to customers, our support teams are in the office three days a week as we believe that skills are developed through collaboration, and that spending time together makes us more creative and connected. It also means we can solve problems as soon as they arise, learn and grow as a team, build trust, and get closer to our colleagues.

Click to skip quote slider carousel
Halford Head of Technical Program Management
Deepak Data Scientist
Janak Staff iOS Engineer

Being in third-party brands, working on things M&S hasn’t done before… that plays to my sweet spot. I’ve worked in many organisations throughout my career, and it’s rare to see such cause and effect in your work. The way we’re structured means you’re encouraged to solve problems and you have the autonomy to make progress quickly.

Halford (He / Him) | Head of Technical Program Management Read full story

At M&S, we have Data Scientists, Analysts, and Technical Product Managers, who all share a genuine passion for harnessing data to improve people’s lives. And we’re in a unique position where we can actually help many different kinds of people, from our customers to our colleagues in store and in our support centre.

Deepak (He / Him) | Data Scientist Read full story

I think all engineers just love solving puzzles and problems. At M&S, we’re constantly learning new things, whether it’s mastering Swift UI or understanding how customers interact with technology. But this is also a business that listens to engineers and values what we bring to the table. That’s different, believe me.

Janak (He / Him) | Staff iOS Engineer Read full story

Make Your Mark

Upcoming projects

Take part in our M&S Digital & Tech team days. Grow your digital and data skills through our BEAM Academy. Or challenge yourself at one of our business-wide hackathons. We also partner with Women in Data, Databricks and Cajigo to increase opportunities for women in digital and data.

Opportunities to be heard

Your voice and your ideas matter here. Our 8 colleague networks are places to find support, listen to each other and encourage debate. You can pitch ideas ‘Straight to Stuart’, our CEO, or get involved in our BIG (Business involvement Group).

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Colleague Networks

We want you to feel supported, no matter what.

Culture and Heritage Network

Raising awareness of various religions and cultures through events and comms, to educate others and better represent our M&S colleagues and customers.

The Gender Equality Network

This group is focused on helping to create a workplace where gender-related challenges are addressed. They raise awareness of common barriers faced and offer support. They also challenge the business to act and empower individuals to ensure that everyone has equal access to opportunities.

The Family & Carers Network

This group represents the different types of families that exist. We act as a support network and sounding board for ideas which help our colleagues as parents or carers. We also run an interactive blog, where you can write your own posts or hear about others' experiences.

Forces Community Network

Supporting colleagues connected to the Armed Forces, aiding their transition to civilian life, and ensuring that they thrive in the workplace.

Health and Wellbeing Network

Providing a safe space for colleagues with all types of health conditions or disabilities and supporting with business initiatives to ensure our stores are truly accessible for our customers.

The Cancer Network

This is a network driven by personal experiences, with the purpose of ensuring that anyone in the M&S family affected by Cancer feels supported and has access to the information they need.

The LGBTQ+ Network

Open to all members of the LGBTQ+ community and spectrum (and their allies), we promote equality, celebrate inclusivity and diversity, and encourage everyone to be themselves - whatever their sexual or gender identity.

Menopause Network

Initiating and encouraging open conversations about menopause by offering support and sharing experiences.

Benefits

How to Apply

Here’s what to expect at each stage of the application process. This can change depending on the role you’ve applied to. If you need any reasonable adjustments made at any stage, let us know and we can help.

Send us your application

Fill in our short application form and hit submit.

Online assessment

Depending on the role you are applying for, you may be invited to do an assessment. Your Talent Acquisition Partner will guide and inform you along the way.

Interview

We'll invite you to join us for an interview. This could be remote or in person. Here, we'll ask you some role based technical questions and examine the behaviours we're looking for. 

Decision

After we’ve made our decision, we’ll be in touch. If you’ve been successful, we’ll officially invite you to join the team and let you know the next steps.

Principal Software Engineer - Selling Experience

Team
Digital & Tech
Store
London Support Office
Location
London, Greater London
Contract type
Permanent
Position type
Full Time
Salary
Competitive + Benefits
Closing date: 26th June 2025
Reference: 82245