5 Seller jobs in the United Kingdom

Who are OnBuy?

OnBuy are an online marketplace who are on a mission of being the best choice for every customer, everywhere. We have recently been named one of the UK's fastest-growing tech companies in the Sunday Times 100 Tech list.

 All achievements we are very proud of, but we don't let that go to our head. We are all laser focused on our mission and understand the huge joint effort ahead of us needed to succeed.

Working at OnBuy:

We are a team of driven and motivated people who thrive when working at pace. To succeed at OnBuy you need to take charge and fully own your responsibilities, rolling your sleeves up when needed to 'get it done'. Working at OnBuy you are surrounded by so much opportunity, but you must possess the ability to stay focused and prioritise ruthlessly. Most importantly, you will thrive in an ever-changing environment as we are constantly evolving.

At OnBuy, you're not just a number or another cog in a machine. We are creating something really special, and you have the opportunity to affect meaningful change and have your voice heard.

We are a close team, who have the opportunity to learn and grow as OnBuy evolves. We work in a flexible way, meaning we can prioritise our health and relationships, but when we are working, we graft.

About the Role
As the Seller Onboarding Manager, you will be the owner of the onboarding experience for all new sellers joining OnBuy. This is not just a support role it’s a business-critical function that connects seller experience to commercial outcomes. You will work cross-functionally to identify friction, drive improvements, and deliver scalable solutions that accelerate seller success and platform growth. Success means demonstrating the ability to connect operational execution with strategic impact, an essential trait for OnBuy.

The ideal candidate will be a cross-functional collaborator, passionate about enabling sellers to thrive on our platform.

Key responsibilities

• Seller Advocacy & Strategic Ownership
• Act as the internal advocate for new sellers, surfacing feedback and pain points to improve the onboarding experience.
• Support the Head of Sales in managing the onboarding funnel from activation through to retention.
• Collaborate with Product and Tech teams to influence roadmap priorities and resolve systemic onboarding blockers.
• Recommend tooling, automation, and product enhancements that improve onboarding efficiency and seller satisfaction.

Onboarding Process Management

Ensure timely completion of all critical onboarding steps, including:

• Account verification
• Integration method selection (Manual, ERP/API, CSV)
• International listing setup
• Shipping rate validation
• Product data quality checks
• Price competitiveness
• Boost and package education
• Brand registration
• Document onboarding progress in Salesforce and create educational content to proactively prevent common seller errors.

Integration & Product Activation

• Incentivise sellers to list best-selling SKUs immediately post-activation.
• Provide tailored support for ERP/API and CSV integrations, including documentation and troubleshooting.
• Collaborate with B2C Marketing to ensure SKU activation within the first month of onboarding.

Retention & Seller Satisfaction

• Design onboarding engagements that promote long-term seller retention.
• Partner with Sales, Support, and Product teams to proactively address early churn signals.
• Maintain a 90% satisfaction rate among strategic sellers through personalised support and feedback-driven improvements.
• Implement and manage onboarding satisfaction surveys in collaboration with B2B Marketing.

Scalable Onboarding & Automation

• Balance high-touch onboarding for strategic sellers with scalable processes for the broader seller base.
• Leverage automation and AI tools to reduce manual effort while preserving personalisation.
• Continuously refine onboarding workflows based on performance data, seller feedback, and internal insights.
  

Performance Monitoring & Reporting

•   Monitor onboarding KPIs and integration milestones to track progress and identify areas for improvement.
•   Identify trends in delays or drop-offs and implement root-cause solutions.
•   Provide regular updates to leadership on seller progress, onboarding performance, and program effectiveness.

Requirements

Experience & Skills

•     Background in sales, customer success, or account management—ideally within e-commerce or marketplaces.
•     Experience working with cross-functional teams such as Product, Engineering, or Marketing.
•     Strong interpersonal skills and a natural ability to build relationships quickly.
•     Comfortable using AI and automation tools to improve efficiency.
•     Analytical mindset with the ability to solve problems using data and feedback.
•     Excellent time management and task prioritisation skills.
•     Clear and confident communicator—both in person and when creating guides or content.
•     Proactive, results-driven, and comfortable taking initiative.
•     Familiarity with ERP systems (e.g., Linnworks, Rithum) and seller integrations.
•     Understanding of e-commerce platforms and seller challenges is a plus.
•     Experience with CRM tools like Salesforce or a willingness to learn.
•     Able to switch between strategic thinking and hands-on execution with ease.

Benefits

The salary on offer for this role is £30,000 - £40,000 per annum, depending on experience + commission

We also offer the following benefits:

• 25 days annual leave + Bank Holidays
• 1 extra day off for your Birthday
• Employee Assistance Programme
• Perks at Work benefit platform
• Opportunities for career development and progression

Plus in return for helping us to grow, we’ll offer you company equity, meaning you own a piece of this business we are all working so hard to build.

Our Commitment

OnBuy is an equal opportunities employer. We are dedicated to creating a fair and transparent workforce, starting with a recruitment process that does not discriminate on the basis of gender, sexual orientation, marital or civil partnership status, pregnancy or maternity, gender reassignment, race, colour, nationality, ethnic or national origin, religion or belief, disability, or age.

Who are OnBuy?

OnBuy are an online marketplace who are on a mission of being the best choice for every customer, everywhere.

We have recently been named one of the UK's fastest-growing tech companies in the Sunday Times 100 Tech list.

All achievements we are very proud of, but we don't let that go to our head. We are all laser focused on our mission and understand the huge joint effort ahead of us needed to succeed.

Working at OnBuy:

We are a team of driven and motivated people who thrive when working at pace. To succeed at OnBuy you need to take charge and fully own your responsibilities, rolling your sleeves up when needed to 'get it done'. Working at OnBuy you are surrounded by so much opportunity, but you must possess the ability to stay focused and prioritise ruthlessly. Most importantly, you will thrive in an ever-changing environment as we are constantly evolving.

At OnBuy, you're not just a number or another cog in a machine. We are creating something really special, and you have the opportunity to affect meaningful change and have your voice heard. 

We are a close team, who have the opportunity to learn and grow as OnBuy evolves. We work in a flexible way, meaning we can prioritise our health and relationships, but when we are working, we graft.

 
Job Summary

The Seller Success Manager plays a critical role in delivering a world-class seller experience across onboarding, incubation, and long-term growth. This role is responsible for translating objectives into actionable plans that drive seller performance, engagement, and GMV growth. Success means demonstrating the ability to connect operational execution with strategic impact, an essential trait for OnBuy.

The ideal candidate will be a cross-functional collaborator, passionate about enabling sellers to thrive on our platform.

Requirements

Key Responsibilities

Driving Growth

•     Lead seller strategies to align with business goals and drive GMV growth.

•     Collaborate across Product, Marketing, Sales, and Support to deliver a seamless end-to-end seller journey.
• Oversee (in partnership with Seller Onboarding) the incubation process for new sellers, ensuring readiness for trading and strong customer experience.
•     Streamline onboarding to reduce friction and accelerate time-to-value.
•     Conduct regular performance reviews of newly onboarded sellers, guiding them through the incubation lifecycle.

Activation & Trading

•     Develop and execute activation strategies and trading moments to boost seller engagement and sales.
•     Promote adoption of platform tools (e.g., Boost) to enhance visibility and performance.
•     Use internal scoring systems to identify high-potential sellers and implement targeted growth plans.
•     Collaborate with Marketing to activate deals and promotions with key sellers.

Performance Monitoring & Enablement

•     Design and implement performance metrics and dashboards (e.g., NPS, real-time seller KPIs).
•     Monitor customer satisfaction and partner with underperforming sellers to improve responsiveness, shipping, and refund rates.
•     Optimise the Seller Control Panel (SCP) for intuitive UX and embedded education.
• Product Collaboration & Feedback Loops
•     Partner with the Seller Success Product team to co-design features that improve seller outcomes.

    Surface seller feedback and operational issues to inform continuous platform improvements.

Experience & Skills

• Proven experience in key account management, seller success, or e-commerce operations within a B2C marketplace.
• Strong leadership and influencing skills.
• Effective storytelling and communication abilities.
• Excellent analytical and problem-solving skills.
• Familiarity with performance metrics and seller scoring systems.
• Ability to collaborate across departments including Product, Support, Sales, and Marketing.
• Strong interpersonal skills and stakeholder management.

Benefits

Benefits

The salary on offer for this role is £30,000 - £40,000 per annum, depending on experience, + Commission

We also offer the following benefits:

• 25 days annual leave + Bank Holidays
• 1 extra day off for your Birthday
• Employee Assistance Programme
• Perks at Work benefit platform
• Opportunities for career development and progression

Plus in return for helping us to grow, we’ll offer you company equity, meaning you own a piece of this business we are all working so hard to build.

Our Commitment

OnBuy is an equal opportunities employer. We are dedicated to creating a fair and transparent workforce, starting with a recruitment process that does not discriminate on the basis of gender, sexual orientation, marital or civil partnership status, pregnancy or maternity, gender reassignment, race, colour, nationality, ethnic or national origin, religion or belief, disability, or age.

Description
Transform constituent experiences for mission-driven organizations via Amazon Connect. As a key member of the team, you'll enable organizations to streamline complex communication challenges and drive innovative technological adoption across the United Kingdom's public sector.
Key job responsibilities
- Drive revenue growth and market penetration for Amazon Connect solutions in the United Kingdom Public Sector
- Develop and execute comprehensive sales strategies targeting enterprise-level accounts
- Build and nurture strategic relationships with key stakeholders at CxO levels
- Collaborate with Solutions Architects and Partner ecosystems to extend solution reach
- Create compelling value propositions that demonstrate tangible business outcomes
A day in the life
Your day will be a blend of strategic relationship building, technical exploration, and collaborative problem-solving. You'll engage with senior executives, technical architects, and innovative partners to design transformative solutions that drive organizational improvements.
About the team
We are a passionate group of customer experience enthusiasts dedicated to reshaping how organizations interact with their customers. Our team is at the forefront of cloud communication innovation, working collaboratively to deliver solutions that make meaningful impacts across industries.
About AWS
Diverse Experiences
AWS values diverse experiences. Even if you do not meet all of the preferred qualifications and skills listed in the job description, we encourage candidates to apply. If your career is just starting, hasn't followed a traditional path, or includes alternative experiences, don't let it stop you from applying.
Why AWS?
Amazon Web Services (AWS) is the world's most comprehensive and broadly adopted cloud platform. We pioneered cloud computing and never stopped innovating - that's why customers from the most successful startups to Global 500 companies trust our robust suite of products and services to power their businesses.
Inclusive Team Culture
AWS values curiosity and connection. Our employee-led and company-sponsored affinity groups promote inclusion and empower our people to take pride in what makes us unique. Our inclusion events foster stronger, more collaborative teams. Our continual innovation is fueled by the bold ideas, fresh perspectives, and passionate voices our teams bring to everything we do.
Mentorship & Career Growth
We're continuously raising our performance bar as we strive to become Earth's Best Employer. That's why you'll find endless knowledge-sharing, mentorship and other career-advancing resources here to help you develop into a better-rounded professional.
Work/Life Balance
We value work-life harmony. Achieving success at work should never come at the expense of sacrifices at home, which is why we strive for flexibility as part of our working culture. When we feel supported in the workplace and at home, there's nothing we can't achieve.
Basic Qualifications
- Demonstrated sales proficiency in CCaaS/SaaS solutions
- Strong understanding of customer experience and contact center technologies and operations
- Technical aptitude with ability to discuss complex technological solutions
- Proven track record of enterprise sales performance
Preferred Qualifications
- Deep understanding of UK Public Sector technology landscape
- Experience with telecommunications, VoIP, and CRM/ERP application sales
- Background in complex solution integration
- Curiosity about emerging customer experience technologies
Amazon is an equal opportunities employer. We believe passionately that employing a diverse workforce is central to our success. We make recruiting decisions based on your experience and skills. We value your passion to discover, invent, simplify and build. Protecting your privacy and the security of your data is a longstanding top priority for Amazon. Please consult our Privacy Notice ( ) to know more about how we collect, use and transfer the personal data of our candidates.
Amazon is an equal opportunity employer and does not discriminate on the basis of protected veteran status, disability, or other legally protected status.
Our inclusive culture empowers Amazonians to deliver the best results for our customers. If you have a disability and need a workplace accommodation or adjustment during the application and hiring process, including support for the interview or onboarding process, please visit for more information. If the country/region you're applying in isn't listed, please contact your Recruiting Partner.