Seller Onboarding Assistant
Salary: Competitive Plus Benefits
Location: London Store Support Centre and Home, London, EC1M 6HA
Contract type: Permanent
Business area: Argos
Closing date: 09 May 2026
Requisition ID: 400059354
At Argos, we’re a digital-led UK retailer that keeps pushing boundaries to meet every generation with what they want, how and when they want it. As a market leader in general merchandise, serving millions of customers through our website, app, same-day delivery and Click & Collect services, we offer real opportunities to learn, grow and shape your career. With roles spanning Commercial, Buying, Merchandising, Design and Supply Chain, through to Digital, Operations, Customer Experience, Marketing, and People and Transformation, you will work with brilliant colleagues and directly shape how we serve our customers every day. From enabling inspiring choice across our owned brands, including Habitat, Chad Valley and Bush, alongside the world’s biggest brands like Apple, Lego, Xbox and Samsung, to making shopping effortlessly convenient, championing trusted value and accelerating our strategy - Argos is an exciting place to build your future.
Seller Onboarding Assistant
Seller Onboarding Assistant (C3)
Commercial/Marketplace
Location
Ansty store support centre or London store support centre
In a nutshell
The Seller Onboarding Assistant is responsible for delivering a seamless, efficient and accurate onboarding experience for new Marketplace Sellers onto the Marketplace back-office platform. This role ensures all technical integrations, operational onboarding tasks and catalogue uploads are completed to a high standard, enabling Sellers to go live successfully and deliver great product choice and service for customers.
What I am accountable for
- The end‑to‑end onboarding journey for new Sellers, ensuring all required tasks (including KYC), documentation and compliance checks are completed accurately and on time.
- Guide Sellers through account setup, supporting them to configure their store, policies, VAT details, shipping methods and operational settings in line with business standards.
- Coordinate and validate all technical integrations, including API connections, feed uploads and order management workflow testing.
- Support Sellers to prepare, format and upload product catalogue data, ensuring compliance with taxonomy, content standards and listing quality expectations.
- Proactively identify onboarding risks or blockers, resolving issues through established processes or escalation to technical teams where required.
- Provide clear communication to internal teams regarding Seller readiness, go‑live timelines and any operational considerations.
- Maintain accurate onboarding status tracking and produce regular progress updates for the Marketplace Seller Success & Onboarding Manager.
- Continuously review and improve onboarding processes, identifying opportunities to simplify and standardise ways of working.
- Deliver a strong seller experience, providing guidance, training and resources to help Sellers feel confident and supported throughout the onboarding journey.
Key Performance Measures:
- Seller onboarding completion rates and time-to-live
- Seller satisfaction/NPS scores post-onboarding
- Integration success rate and average time to resolve integration issues
- Compliance and quality metrics for new listings
- Reduction in onboarding-related support tickets
- Team engagement
What I need to know
Essential
- Experience working within ecommerce, marketplace operations or seller/vendor management.
- Understanding of product catalogue structures, data quality standards and taxonomy.
- Ability to troubleshoot technical issues related to APIs, feed integrations or backend platforms.
- Strong organisational skills with the ability to manage multiple onboarding workstreams simultaneously.
- Excellent communication skills and ability to support a wide range of external partners.
- High attention to detail and comfort working with spreadsheets, data templates and validation tools.
Desirable
- Experience working directly with Mirakl Marketplace or similar marketplace platforms.
- Familiarity with digital content standards, SEO principles or marketplace listing optimisation.
- Experience in a retailer or large‑scale commercial environment.
- Knowledge of seller compliance processes (KYC, VAT validation, product safety, etc.).
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 save 10% on your shopping online and instore at Sainsbury's, Argos, TU and Habitat, and we regularly increase the discount to 15% at points during the year. 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 bonus of up to 5% of salary, depending on how we perform. Your wellbeing is important to us too. You'll receive an annual holiday allowance and you can buy up to an additional week's 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, salary 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 www.sainsburys.jobs for a range of our benefits (note, length of service and eligibility criteria may apply).
