33 Accountant UK

Help Build Europe's Hypersonic Capability

At Hypersonica, we’re redefining what’s possible in European defence technology. We exist to deliver speed, resilience, and technological independence at a pace that sets a new standard. We are a small, elite team working on problems that matter, and solving them fast.

By joining Hypersonica, you’re not stepping into a predefined role. You’re joining a talent dense environment where every individual shapes the direction of the company. Our philosophy is to hire a small number of exceptional people with broad, deep technical capability, strong judgement, and the ability to operate autonomously.

We hire for talent, not rigid boxes. This role represents a business need, but the way it evolves will be shaped by the individual. If you’ve achieved what others said was impossible, or you bring a unique combination of skills that doesn’t fit a traditional mould, we want to hear from you. The work you do here directly contributes to Europe’s technological independence.

What you'll do

Own day to day operational accounting for our UK entity, including accounts payable, expense pre booking, payment preparation, and monthly transaction discipline, ensuring compliance and accuracy in a fast scaling defence environment.

Help keep an overview on project budget and cost.

Finalise and stabilise the rollout of our new expense management system, embedding clean workflows, documentation standards, and approval controls across the company.

Identify, design, and implement process improvements across core accounting workflows, reducing manual effort and increasing automation using modern finance tools and AI where appropriate.

Maintain structured documentation and audit readiness to ensure compliance with accounting and tax standards and future audit requirements.

Act as a reliable operational backbone to the Director of Finance (based in Munich), freeing capacity for strategic work including fundraising, capital planning, and long term financial structuring.

Who you are

A self-standing accountant with hands on experience managing transactional accounting processes independently, particularly on the creditor side.

Experience with UK and ideally also German accounting environment

Comfortable operating in a growing, technically complex company where capex, hardware, and engineering driven spend require structured financial discipline.

Proactive and process minded, with a track record of identifying gaps and improving workflows rather than waiting for instruction.

Excited by automation and modern finance tooling, with experience using or implementing systems such as MOSS, Pleo, Finway, or similar tools.

Structured, detail oriented, and reliable under pressure, with the judgement to maintain compliance while moving at startup speed.

Motivated by building clean, scalable financial infrastructure rather than simply maintaining legacy bookkeeping.

Security and Eligibility Requirement

Due to the nature of the work with the UK MOD, applicants must be a British Citizen (or Dual UK national with British citizenship) and eligible for UK Security Clearance (SC) and, where required, Developed Vetting (DV)

At Hypersonica, every hire raises the bar. We are deliberately small, intensely capable, and deeply mission-driven. If this role feels like a strong fit, or if you believe you bring something exceptional that goes beyond the description, we encourage you to apply.

Hypersonica is an equal-opportunity employer and assesses candidates solely on merit, capability, and potential.

You can apply directly to this role or reach out to Nathan Sweeney, Head of Talent. We review every application and aim to respond to all candidates within two weeks, whether the answer is yes or no.