The Opportunity
We are looking for a Finance Assistant to join our finance team with an immediate start. This is a great opportunity to gain hands-on experience in a high-growth deep-tech business, working across a defined set of transactional finance processes that are genuinely important to how we run day-to-day.
You'll be working as part of a team of four, picking up ownership of key tasks from day one — including expense management across our UK, US, and Singapore entities, and bank account reconciliations. This is ideal for someone with finance interest who wants to consolidate their skills in a fast-paced environment, and who takes pride in getting things right.
What You’ll Do
Expense management
- Reviewing and approving employee expense claims in line with company policy across the UK, US, and Singapore entities.
- Reconciling receipts to card transactions and following up on any missing documentation.
- Ensuring expenses are correctly coded and compliant before reaching payment stage.
Bank reconciliations
- Performing regular bank account reconciliations across multiple entities.
- Investigating and resolving discrepancies promptly and accurately.
- Keeping records clean and audit-ready at all times.
Ad hoc finance support
- Supporting the wider finance team with additional ad-hoc transactional tasks and process improvements as they arise.
What makes a great candidate
- Switched-on and a fast learner — you pick things up quickly and don't need to be told the same thing twice.
- Highly organised, with a reliable approach to managing your own workload and deadlines.
- Accurate and detail-oriented — you take care to get things right and notice when something doesn't add up.
- A proactive communicator — you flag issues early and know when to escalate rather than sitting on a problem.
- Comfortable in a dynamic, fast-paced environment where you'll need to manage your time well.
Bonus Points
- Experience with Xero or a similar accounting platform.
- Some prior experience in a finance, bookkeeping, or accounting role — whether through an internship, placement, or a first job in finance.
Contract details
- Location: London — hybrid, with 3 days per week in the office
- Fixed Term Contract - until 30 April 2027 · London (Hybrid – 3 days in office)
- Start date: As soon as possible
Skills Required
- Fast learner who picks things up quickly
- Highly organised with reliable approach to managing workload and deadlines
- Accurate and detail-oriented; notices discrepancies
- Proactive communicator who flags issues and escalates appropriately
- Comfortable working in a dynamic, fast-paced environment and managing time well
- Experience with Xero or a similar accounting platform
- Some prior experience in a finance, bookkeeping, or accounting role (internship, placement, or first job)
- Based in or able to commute to London for hybrid work (3 days per week)
What We Do
PhysicsX is a deep-tech company of scientists and engineers, developing machine learning applications to accelerate physics simulations and enable a new frontier of optimization opportunities in design and engineering. Born out of numerical physics, we help our customers radically improve their concepts and designs, transform their engineering processes and drive operational product performance. We do this in some of the most advanced and important industries of our time – including Space, Aerospace, Medical Devices, Additive Manufacturing, Electric Vehicles, Motorsport, and Renewables. Our work creates positive impact for society, be it by improving the design of artificial hearts, reducing CO2 emissions from aircraft and road vehicles, and increasing the performance of wind turbines. We are currently recruiting for multiple positions, however please only apply for the role that best aligns with your skillset and career goals. We do not currently offer work experience
