Finance Manager in London

Location: Cardiff (Office-based, 5 days a week)

Salary: £38,000- £44,000 base (DOE) + up to £3,000 annual bonus

Start Date: Early 2026

Are you an experienced finance professional ready to take ownership of the full finance function within a growing tech business? If you’re comfortable managing end-to-end finance operations and want a role where your hands-on work and insight directly supports leadership decision-making, this could be the opportunity you’ve been looking for.

At Advanced Secure Technologies, we’re a fast-growing, innovative company on a mission to protect organisations from document fraud through secure digital solutions. Based onsite in St Mellons, Cardiff, we’re expanding our Business Support team and are looking for a Finance Manager to lead and manage the company’s finance function as our sole finance professional.

You’ll work closely with the Managing Director, Directors, and Head of People, with day-to-day support from experienced senior managers and our external accountants. This structure gives you autonomy and ownership, while ensuring professional support for statutory accounts, tax compliance, and best‐practice governance.

What you’ll do:

• Manage the end-to-end finance function, ensuring accurate, timely, and well-controlled financial operations.
• Raise customer invoices, manage credit control, and oversee debtor monitoring and cash collection.
• Process supplier invoices and maintain purchase ledger records.
• Complete bank, balance sheet, and control account reconciliations.
• Maintain and manage the accounting system, ensuring data integrity and consistency.
• Prepare and submit information for VAT returns and support compliance processes.
• Maintain the fixed asset register, accruals, and prepayments.
• Produce monthly management accounts including P&L, balance sheet, and cash‐flow reporting.
• Prepare monthly reporting packs with commentary, variance analysis, and key financial insights.
• Monitor cash flow and produce regular forecasts to support business planning.
• Support budgeting and reforecasting activities, providing financial guidance to senior leadership.
• Work closely with external accountants on year‐end statutory accounts and tax requirements.
• Maintain and improve financial controls, procedures, and audit readiness.
• Support commercial decisions on pricing, contracts, suppliers, and cost control.
• Collaborate with Sales, Admin/Operations, and senior stakeholders on finance‐related matters.

Requirements

What you bring:

• Experience managing finance in an SME environment with end-to-end responsibility.
• Proven experience producing monthly management accounts and cash‐flow reporting.
• Strong understanding of transactional finance, reconciliations, and VAT processes.
• Confidence operating accounting software (e.g. Xero, Sage, or similar) and Excel.
• Ability to work independently, manage competing priorities, and take ownership.
• Strong communication skills and the ability to explain financial information to non-finance colleagues.

Bonus points for:

• AAT Level 4, part‐qualified or fully qualified ACCA/CIMA, or qualified by experience.
• Experience in a technology, SaaS, or B2B environment.
• Experience improving finance processes, controls, or systems.
• Exposure to dashboards or reporting tools (e.g. Power BI).
• Ambition to progress into a Head of Finance or Finance Director role over time.

Benefits

What we offer:

• Competitive salary £38,000-£44,000 (DOE) + monthly performance bonus (where applicable).
• A senior, trusted role with clear ownership and influence across the business.
• Support from external accountants and experienced senior managers.
• 25 days holiday & Bank Holidays.
• Training and development support, including professional finance qualifications where appropriate.
• Free gym, free secure parking, free eyecare, and a fully stocked kitchen.
• Company car and cycle‐to‐work schemes.
• A supportive culture with regular office events and recognition of contribution.

Location and hours:

Onsite, Eastern Business Park, St Mellons, Cardiff, Wales. Minimum 37.5 hours per week, Monday to Friday, 8.30am to 5.00pm, with up to one hour for lunch.

Onsite working

We’re an office-based team because our culture thrives on collaboration and hands‐on support, particularly as we grow. While we don’t offer fully remote or fixed hybrid working, we’re flexible when life happens – ad hoc home working is always an option.

Diversity & inclusion

Advanced Secure Technologies is an equal opportunity employer, proud of our ongoing efforts to foster diversity and inclusion. We welcome applicants from all backgrounds and process personal data in accordance with our Privacy Notice.