Finance Assistant

Portal Biotech
London

About the role

We’re looking for an Finance Assistant to support the day-to-day running of the finance function in a growing startup. This is a hands-on role, ideal for someone who enjoys variety and wants to develop their skills in a fast-paced environment.

Key responsibilities

  • Processing purchase invoices (AP) and ensuring timely approvals

  • Managing supplier payments and weekly payment runs

  • Posting and reconciliation of credit cards and expenses

  • Supporting bank reconciliations and monitoring cash flow

  • Assisting with month-end processes (accruals, prepayments, journals)

  • Maintaining accurate records in the finance system currently xero but transitioning to Sage Intacct

  • Supporting expenses processing and payroll admin (if required)

  • Helping improve finance processes as the business scales

What we’re looking for

  • 1–3 years’ experience in a similar Accounts Assistant / Finance Assistant role

  • Good understanding of AP/AR processes

  • Strong attention to detail and organisation skills

  • Comfortable using Excel and accounting software (e.g. Xero, Sage)

  • Proactive, reliable, and willing to get stuck in

  • Studying AAT (or interested in starting) is a plus

What you’ll get

  • Opportunity to grow with the business and take on more responsibility

  • Exposure to a broad range of finance activities

  • Comprehensive benefits package

  • Support with training / AAT (if relevant)

  • Flexible / hybrid working

Nice to have (not essential)

  • Startup or SME experience

  • Experience supporting audits or month-end close

  • Exposure to VAT returns

Posted 2026-07-10

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