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About the Role

PhysicsX is seeking a Senior Financial Accountant to join its finance team. This role requires expertise in complex, multi-entity, and multi-jurisdiction accounting, offering significant ownership of processes. The position involves acting as the point of contact for group tax and statutory reporting across UK, US, and Singapore entities, collaborating with external advisors, and driving process improvements.

Responsibilities

Leading global revenue recognition in line with FRS 102, ensuring accuracy and consistency with Group accounting policies across all entities.
Supporting group tax compliance across the UK, US, and Singapore, acting as the main point of contact between the business and external tax advisers.
Ensuring corporation tax returns and year-end filings, including federal, state, and local obligations, are completed accurately and on time.
Managing VAT and GST compliance obligations across jurisdictions.
Supporting R&D tax credit claims in collaboration with specialist advisers.
Owning the AR function end-to-end, including customer invoicing, cash allocation, and credit control, ensuring timely and accurate processing.
Maintaining compliance with complex accounting standards across the group, including lease accounting (IFRS 16) and share-based payments (IFRS 2).
Assessing and implementing new or amended standards as they come into effect, ensuring Group accounting policies remain current and consistent.
Acting as the internal point of reference for technical accounting queries across the business.
Leading timely and accurate statutory and regulatory reporting across the group, ensuring compliance with IFRS, UK GAAP, and relevant local standards.
Providing audit support.
Building and evolving a robust but agile financial controls framework.
Partnering with the wider organisation to embed smarter financial processes.
Identifying and implementing process improvements to strengthen controls, efficiency, and reporting quality.

Requirements

A qualified accountant (ACA or ACCA) with at least four to five years of relevant post-qualification experience.
Strong technical accounting knowledge, confident with IFRS, UK GAAP, and comfortable navigating multi-jurisdiction regulatory requirements.
Demonstrable experience across tax compliance, revenue recognition, and statutory reporting.
Experience in a technology, engineering, SaaS or high-growth start-up environment.
Accurate and detail-oriented.
Able to own and execute workstreams independently, while working collaboratively as part of a team.
Excellent organisational and time management skills.
A proactive communicator with both internal stakeholders and external advisers.
Comfortable in a fast-moving, high-growth environment where the landscape is constantly evolving.

Skills

Technical accounting
IFRS
UK GAAP
Multi-jurisdiction regulatory requirements
Tax compliance
Revenue recognition
Statutory reporting
Financial controls
Process improvement
Organisational skills
Time management
Communication

Location

London

Work Type

Permanent
Full-time
Hybrid

Experience Level

Senior
4-5 years post-qualification experience

Education Level

Qualified accountant (ACA or ACCA)

Benefits

Equity options
10% employer pension contribution
Free office lunches
Enhanced parental leave (3 months full pay paternity, 6 months full pay maternity)
YellowNest nursery scheme
25 days of Annual Leave (+ Public Holidays)
Private medical insurance (100% employee cover)
Wellhub Subscription
Eye tests
Personal development support
Employee Assistance Programme (EAP)
Bike2Work scheme
Season ticket loan
Octopus EV salary sacrifice

About the Company

PhysicsX is a deep-tech company with roots in numerical physics and Formula One, dedicated to accelerating hardware innovation at the speed of software.
We are building an AI-driven simulation software stack for engineering and manufacturing across advanced industries.
PhysicsX unlocks new levels of optimization and automation in design, manufacturing, and operations by enabling high-fidelity, multi-physics simulation through AI inference across the entire engineering lifecycle.
Our customers include leading innovators in Aerospace & Defense, Materials, Energy, Semiconductors, and Automotive.

Equal Opportunity

We value diversity and are committed to equal employment opportunity regardless of sex, race, religion, ethnicity, nationality, disability, age, sexual orientation or gender identity.
We strongly encourage individuals from groups traditionally underrepresented in tech to apply.
To help make a change, we sponsor bright women from disadvantaged backgrounds through their university degrees in science and mathematics.
We collect diversity and inclusion data solely for the purpose of monitoring the effectiveness of our equal opportunities policies and ensuring compliance with UK employment and equality legislation.
This information is confidential, used only in aggregate form, and will not influence the outcome of your application.