At a Glance
- Tasks: Manage supplier-funded media activations and optimise performance on our ecommerce platform.
- Company: Join Sainsbury’s innovative Nectar360 team, a leader in retail media.
- Benefits: Enjoy discounts, flexible working, and a competitive salary with performance bonuses.
- Other info: Embrace a culture of inclusivity and continuous development.
- Why this job: Make a real impact in a dynamic environment while developing your skills.
- Qualifications: Experience in client management and data analytics is essential.
The predicted salary is between 40000 - 50000 € per year.
Salary: Competitive Plus Benefits
Location: London Store Support Centre and Home, London, EC1M 6HA
Contract type: Fixed-Term Assignment
Business area: Nectar 360 Ltd
Closing date: 24 May 2026
We’d all like amazing work to do, and real work-life balance. That’s waiting for you at Sainsbury’s. Everything our Nectar team does is powered by data and by strong relationships with some of the UK’s favourite brands. The Nectar360 team develops loyalty programmes, turning insight into something that makes a real difference, across both traditional and digital media. It’s like an agency within a retailer, and retail media is a crucial part of our future. The culture might not be what you expect either, because there’s no setup quite like this one. The team is a real priority, connected to almost everything the business does and playing a key role in driving profitability. It’s a place where you can take risks, learn from them, and be recognised.
10 month fixed term contract (London / Hybrid)
About the team
Nectar360 sits at the heart of Sainsbury’s retail media and loyalty ecosystem, focused on creating a brilliant digital experience for customers shopping online. We’re a fast‑growing, dynamic team powering supplier‑funded campaigns across Sainsbury’s.co.uk, the Sainsbury’s App and OnDemand channels—helping brands connect with customers at the moments that matter. Working as part of our Digital Media function, you’ll collaborate with talented colleagues across trading, digital trading and ad operations to deliver best‑in‑class execution and measurable impact.
More about the role
As an Ecommerce Client Manager, you’ll be accountable for the end‑to‑end management and delivery of supplier‑funded media activations across your business unit on Groceries Online (GOL). You’ll work within defined trading and planning guardrails to drive supplier investment, optimise spend, and track performance against commitments—ensuring activity aligns to supplier activation plans and delivers excellent execution.
Day to day, you’ll partner closely with category suppliers and internal stakeholders to review performance, investment and strategy, while working with ad operations teams to ensure campaigns are activated and optimised effectively on our ecommerce media platform. You’ll also play a key role in educating and up‑skilling colleagues on GOL media, contributing to the ongoing development of a profitable, customer‑focused media proposition that protects the customer journey. You’ll provide regular updates to the Ecommerce Client Director and Senior Ecommerce Client Manager on client performance, project delivery and revenue status, supporting shared priorities and smooth delivery.
More about you
You’re highly organised and methodical, comfortable managing multiple workstreams in a fast‑paced and sometimes ambiguous environment, while maintaining strong attention to detail—especially when working with data and analytics tools. You bring a solid foundation in client management (ideally within retail or FMCG), combining analytical and numerical capability with clear communication and presentation skills that build trust with internal and external stakeholders.
Commercially minded and strategically aware, you can align plans to broader business objectives, negotiate effectively to balance competing priorities, and deliver to deadlines. You take ownership, proactively spot risks and opportunities, and collaborate across teams—often through matrix ways of working—to drive outcomes against client objectives and revenue targets. You’re also committed to continuous development and happy to stretch beyond your comfort zone as you grow within the role.
Essential criteria (up to 5)
- Demonstrable experience managing end‑to‑end delivery of supplier‑funded ecommerce media activations (briefing, activation, optimisation and post‑campaign review).
- Proven ability to track spend and performance against agreed commitments using data and analytics tools, and turn insights into clear recommendations.
- Evidence of building productive relationships with suppliers and internal stakeholders (e.g., trading/digital trading) to align plans and prioritise activity.
- Experience working with ad operations teams to ensure campaigns are activated accurately and optimised effectively on an ecommerce media platform.
- Ability to manage multiple concurrent workstreams to deadline within defined guardrails, providing clear status updates on performance, delivery and revenue.
We are committed to being a truly inclusive retailer, so you’ll be welcomed whoever you are and wherever you work. Around here, there’s always the chance to try something new - whether that’s as part of an evolving team or somewhere else across the business - and we take development seriously and promise to support you. We also recognise and celebrate colleagues when they go the extra mile and, where possible, offer flexible working. When you join our team, we’ll also offer you an amazing range of benefits.
Here are some of them:
- Starting off with colleague discount, you'll be able to get 10% off at Sainsbury's, Argos, TU and Habitat after 4 weeks. This increases to 15% off at Sainsbury’s every Friday and Saturday and 15% off at Argos every pay day.
- We've also got you covered for your future with our pensions scheme and life cover.
- You'll also be able to share in our success as you may be eligible for a performance‑related target bonus of up to 10% of salary (which may vary for Nectar360), depending on how we perform.
- Your wellbeing is important to us too. You'll receive an annual holiday allowance and you can buy additional holiday.
- We also offer other benefits that will help your money go further such as season ticket loans, cycle to work scheme, health cash plans, pay advance (where you can access some of your pay before pay day) as well access to a great range of discounts from hundreds of other retailers.
- And if you ever need it there is also an employee assistance programme.
- Moments that matter are as important to us as they are to you which is why we give up to 26 weeks’ pay for maternity or adoption leave and up to 4 weeks’ pay for paternity leave.
Please see for a range of our benefits (note, length of service and eligibility criteria may apply).
Ecommerce Client Manager in London employer: Sainsbury's Supermarkets Ltd
At Sainsbury’s, we pride ourselves on being an exceptional employer, offering a vibrant work culture that prioritises employee well-being and development. As part of the Nectar360 team, you will enjoy a dynamic environment where innovation is encouraged, alongside competitive benefits such as generous discounts, performance-related bonuses, and flexible working options. With a strong focus on collaboration and continuous growth, this role in our London Store Support Centre provides a unique opportunity to make a meaningful impact in the retail media landscape.
Contact Detail:
Sainsbury's Supermarkets Ltd Recruiting Team
StudySmarter Expert Advice🤫
We think this is how you could land Ecommerce Client Manager in London
✨Tip Number 1
Network like a pro! Reach out to people in the industry, especially those connected to Sainsbury’s or the Nectar360 team. A friendly chat can open doors and give you insights that might just land you an interview.
✨Tip Number 2
Prepare for the interview by knowing your stuff! Research Sainsbury’s, their values, and the Nectar360 team’s projects. Show them you’re not just another candidate but someone who genuinely cares about their mission.
✨Tip Number 3
Practice makes perfect! Get a friend to do a mock interview with you. Focus on articulating your experience in managing supplier-funded media activations and how you can contribute to their goals.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen. Plus, it shows you’re serious about joining the team at Sainsbury’s.
We think you need these skills to ace Ecommerce Client Manager in London
Some tips for your application 🫡
Tailor Your Application:Make sure to customise your CV and cover letter for the Ecommerce Client Manager role. Highlight your experience with supplier-funded media activations and how you've successfully managed client relationships in the past. We want to see how you can bring value to our team!
Showcase Your Analytical Skills:Since this role involves a lot of data and analytics, don’t shy away from showcasing your numerical capabilities. Include examples of how you've tracked performance and turned insights into actionable recommendations. We love seeing candidates who can think critically!
Communicate Clearly:Your ability to communicate effectively is key in this role. Use clear and concise language in your application to demonstrate your presentation skills. Remember, we’re looking for someone who can build trust with both internal and external stakeholders.
Apply Through Our Website:We encourage you to apply directly through our website. It’s the best way to ensure your application gets the attention it deserves. Plus, you’ll find all the details about the role and our amazing benefits there!
How to prepare for a job interview at Sainsbury's Supermarkets Ltd
✨Know Your Numbers
As an Ecommerce Client Manager, you'll be dealing with data and analytics tools regularly. Brush up on your numerical skills and be prepared to discuss how you've used data to track performance and make recommendations in past roles. This will show that you can handle the analytical side of the job.
✨Build Relationships
This role requires strong relationships with suppliers and internal stakeholders. Before the interview, think of examples where you've successfully built these kinds of relationships. Be ready to share how you’ve collaborated across teams to drive outcomes, as this will demonstrate your ability to work effectively in a matrix environment.
✨Showcase Your Project Management Skills
You'll need to manage multiple workstreams, so come prepared with examples of how you've juggled various projects in the past. Highlight your organisational skills and attention to detail, especially when it comes to meeting deadlines and providing clear status updates on performance.
✨Be Ready to Discuss Campaigns
Since you'll be managing supplier-funded media activations, be prepared to talk about specific campaigns you've worked on. Discuss the end-to-end process from briefing to post-campaign review, and how you ensured that everything aligned with business objectives. This will show your understanding of the role and your hands-on experience.
