Financial Accountant / Group Accountant in London

About hyperexponential (hx): At hyperexponential, we're building the AI-powered platform that enables the world's most critical decisions in a $7 trillion industry - which risks to take, and how to price them. These are the decisions that shape real-world outcomes: whether rockets successfully launch into space, autonomous vehicles make it to market, or communities recover after major storms. Until now, insurance has been making billion-dollar decisions using outdated tools. Our platform brings together data, AI, and human expertise to give insurers the fastest path from submission to decision - helping them move faster, act smarter, and take on more risk with confidence.

AI is at the core of what we do - from building the world's first domain-specific AI peer programmer for insurance (think GitHub Copilot with a PhD in actuarial science) to shaping agentic workflows that reinvent how this industry operates. If that sounds like you, join us in building what comes next. It is not a back-office function; The team is still building its foundations, which means there is genuine scope to define how processes work, not just execute them. Everyone on the team is relatively new to their role, and that is by design. hx is growing quickly, and the Finance function is scaling to match. This role sits at the heart of day-to-day finance operations: revenue, VAT, payroll, banking, and month-end close.

What you'll be doing:

• Own the end-to-end revenue and accounts receivable cycle in NetSuite, ensuring sales orders are raised promptly, invoices reflect the correct FRS102 revenue recognition treatment, and the AR ledger is reconciled monthly with no unexplained misstatements at year-end audit.
• Drive the month-end close to a defined timetable, completing the close by working day four and ensuring all balance sheet reconciliations are evidenced and reviewed by working day seven.
• Manage UK VAT compliance from preparation through to filing, maintaining audit-ready workpapers at all times and ensuring every return is reconciled, accurate, and submitted on time with no penalties.
• Take full ownership of UK payroll once the HiBob transition completes, processing each monthly run accurately and on schedule, and maintaining clean payroll-to-NetSuite reconciliations.
• Oversee banking, treasury, and payment controls, including maintaining a rolling cash flow forecast, keeping bank accounts reconciled in NetSuite, and acting as a control point on payment runs to prevent unauthorised or duplicate payments.
• Identify and deliver at least one process improvement or automation each quarter, keeping SOPs current and approaching documentation as a control rather than an administrative task.

What you'll need to have done:

• Operated core finance processes end-to-end in a fast-paced or high-growth environment, with clear personal ownership of recurring cycles such as revenue, VAT, payroll, or month-end close rather than supporting a larger team at arm's length.
• Used NetSuite hands-on across multiple functional areas, including Advanced Revenue Management, intercompany transactions, and reconciliation workflows; experience across more than one organisation or configuration is a strong advantage.
• Prepared and filed UK VAT returns with a solid understanding of coding, reconciliation, and the treatment of non-UK sales and purchases, and maintained documentation to a standard that can withstand an HMRC query without a handover.
• Demonstrated a consistent instinct for improving and automating manual processes, with the ability to articulate both the before and the after, and the judgement to know when a manual control should be kept.
• Shown the character and values that make finance work in a high-trust environment: honesty about problems before they escalate, clear written communication, and a collaborative mindset that strengthens the team around you.

You're unlikely to thrive here if you prefer stability and predictability over environments where processes are still being built and priorities can shift quickly. We're building something that asks for commitment and conviction, and we want you to feel excited by the opportunity to grow with us.

Benefits:

• £5,000 training and conference budget for individual and group development.
• 25 days of holiday plus 8 bank holidays (33 days total).
• Company pension scheme via Penfold.
• Mental health support and therapy via Spectrum.life.
• Individual wellbeing allowance via Juno.
• Private healthcare insurance through AXA.
• Income protection and Life Insurance.
• Cycle to Work Scheme.
• Regular remote and in-person hackathons, lunch and learns, socials, and game nights.
• Team breakfasts and lunches, snacks, drinks fridge, and a fun office at The Ministry.
• Exceptional opportunities for personal development and growth as we build something remarkable together.

Interview process:

• Initial call with our Talent team to kick things off.
• Hiring Manager screen with the Finance leadership team.
• Coffee chat with a senior leader at hx.

Diversity is not just the right thing to do, it is key to solving the complex challenges we choose to take on. Our dedicated talent team reviews all applications, and we promise to provide feedback regardless of the outcome.

Please note that background checks will be conducted as part of the hiring process to ensure compliance with our governance policies. All applicant data will be processed in accordance with data protection regulations and our privacy policy.

Location: London (hybrid)

Employment Type: Full time

Department: Central Functions Finance & Data Control