Finance Manager UK

Mustard is looking for an enthusiastic and experienced Finance Manager to join our growing team. As Finance Manager - UK at Mustard, you'll be at the heart of our UK and European finance function, managing day-to-day bookkeeping, ensuring accurate compliance, and working hand-in-hand with our external accountant to meet all statutory requirements. You'll lead the UK delivery of our finance processes, providing timely data and analysis to support commercial decision-making across our growing global business.

This role is ideal for a detail-driven, fully qualified finance professional who's excited by the pace and variety of a fast-scaling global e-commerce brand. You'll work closely with our Head of Finance and play a key part in strengthening Mustard's financial foundations and commercial clarity.

While this isn't a people management role, you'll work independently across functions, partner with our external accountant, and support strategic decision-making by keeping our books accurate and our numbers reliable.

This is a fantastic opportunity for someone who wants to step into a business-facing role, gain exposure to a global setup, and grow into future leadership as our finance team expands.

Who are we?

We are Mustard. We've got a thing for lockers. We're two sisters, living on opposite sides of the world, on a global mission to inspire our community to create spaces that truly reflect who they are - whether at home, at work, or at play. Through our pretty and practical products, we help people design colourful, organised, and joyful spaces, growing a brand that feels just as good on the inside as it looks on the outside!

What's in it for you?

Take ownership of finance operations in a fast-growing global e-commerce brand

Work on exciting projects that directly impact customers around the world

Collaborate with passionate teams who love what they do

We're a start-up, be part of a journey where your ideas can shape the future

What you'll be doing

Bookkeeping + Month-End

• Maintain accurate bookkeeping in Xero for UK and European operations, ensuring transactions are correctly coded and documented
• Ensure a timely month-end close and deliver clean books for the Head of Finance to prepare management accounts
• Coordinate accruals, prepayments, and journals with the Head of Finance oversight
• Finalise year-end close and ensure financial records are complete and audit-ready
• Monitor data flows from Shopify and our Inventory Management System (CIN7) into Xero to ensure consistency and accuracy

Compliance + External Accounting

• Liaise with the UK accountant to ensure timely and accurate VAT filings (UK and EU)
• Collate and provide documentation for import VAT and cross-border EU sales
• Assist with the preparation of statutory accounts and the corporation tax return, ensuring accurate data handover
• Coordinate with the UK accountant on tax, compliance and reconciliation regularly
• Maintain compliance-ready finance records and provide timely responses to accounting queries
• Collaborate with the Australian Business Operations Manager to ensure global consistency in finance practices

Accounts Payable + Receivable

• Process and reconcile supplier invoices and staff reimbursements
• Prepare weekly payment runs and maintain cashflow visibility
• Oversee wholesale debtor management and follow-up with the sales team on overdue accounts receivable - UK, Europe and USA.
• Assist in the setup of new supplier and customer accounts, ensuring proper documentation

Payroll + Banking

• Oversee monthly UK payroll in coordination with the external accountant
• Review pension scheme submissions and payroll journals
• Conduct bank and credit card reconciliations regularly
• Monitor FX exposures and support the Head of Finance in assessing implications

Reporting + Collaboration

• Support the preparation of monthly management accounts and performance commentary
• Provide ad hoc analysis and financial data for the wider team
• Monitor financial controls and workflows for efficiency and risk mitigation
• Contribute to process improvement initiatives, system optimisation, and documentation of workflows
• Align with the Head of Finance on commercial priorities and budgeting needs across departments
• Assist in consolidating data across multiple currencies and markets (UK, EU, US, AU) for group-level reporting

Hello, is it you we're looking for?

• You're a fully qualified accountant (ACCA, ACA, or CIMA)
• You have at least 3 years' post-qualification experience in a hands-on finance role, ideally with exposure to international operations
• You're confident working independently, liaising with external accountants, and keeping financial operations accurate and on track
• You have a strong understanding of UK VAT and EU intra-community sales
• You're experienced with Xero and comfortable using cloud-based finance systems
• You're competent in Excel or Google Sheets and confident working with multiple currencies
• You've worked in an e-commerce, retail, or inventory-based business
• You have excellent attention to detail and communicate clearly and professionally
• You're highly organised and motivated to meet deadlines and maintain high standards
• You've used Shopify or are keen to learn
• You enjoy improving workflows and spotting opportunities to make things more efficient

The important stuff

HOME

Flexible working hours

Hybrid office schedule (3 days in-office)

Paid personal + carers leave

WORK

Named in The Sunday Times Best Companies to Work For 2025

Competitive salary based on experience (£52-£55k DOE)

Colourful office space in Camden NW1

All tools and tech you could need

Your own personal and professional development budget

Listed in The Times Fastest Growing Companies in the UK in 2023

in The Times Best Companies To Watch Out For 2022

Immediate start to the right candidate

PLAY

22 days holiday (plus bank holidays)

Plus an extra day for your birthday!

Regular team lunches & creative socials

50% team discount on Mustard products

If you like the sound of the role, we'd love to hear from you. Send an email to Victoria on with your CV and a little bit about you.

Want some bonus points? Let us know your favourite locker and why.

We highly encourage people of all cultures, ethnicities, abilities and sexual orientations to apply. Even if you don't meet all of the criteria, we still highly encourage you to apply and tell us why you think you're the right person for the job.

Applications close 30th June 2025 we can't wait to hear from you!