Accounting Manager

About aion aion is an Applied AI Research Lab that designs, builds, and deploys custom AI models, intelligent agents, and end-to-end AI systems for enterprises. We're a small, high-conviction team and we're building the finance function to match. The Role We're hiring an Accounting Manager to own and build aion's finance operations. You'll work directly with the founders and senior leadership, sitting at the centre of every financial decision as we scale globally. As aion grows, you'll take the lead on building out the FinOps function. Responsibilities Lead and continuously improve consolidations, allocations, and intercompany processes across our multi-entity, multi-currency global structure Drive month-end and year-end close including account reconciliations, financial statement preparation, and all compliance activities Own the external annual audit end-to-end - primary relationship with our CPA firm Build and maintain scalable finance operations that support timely, accurate management reporting to founders and senior leadership Support recurring management reporting and ad hoc analysis as the business demands Manage statutory compliance and filings across all jurisdictions — including US sales taxes, federal/state corporate income taxes, UK corporation tax, VAT returns, Companies House filings, and UK statutory account Establish and maintain a strong internal control environment aligned with public company readiness standards, including documented workflows and accounting policies Continuously evaluate and improve systems, tools, and processes. We expect you to automate the boring stuff Knowledge of US and UK GAAP, expense allocations, global consolidations, and intercompany accounting Hands-on experience with multi-currency accounting and global entity reporting 5–8 years of progressive accounting experience - meaningful time in a high-growth tech or startup environment is essential Experience with international payroll and multi-entity accounting Experience with UK statutory accounts, Companies House filings, and UK corporation tax compliance Strong working knowledge of modern accounting systems (Xero, Ramp, etc.) and advanced Excel / Google Sheets CPA preferred You build processes under resource constraints and don't wait for a perfect system before getting things done You operate well in ambiguity, adapt to shifting priorities, and maintain a growth mindset Work directly with the founding team - your work matters immediately Work with a high-caliber, globally distributed team backed by major VCs Ground-floor opportunity to build the finance function at a fast-moving AI lab Competitive compensation + benefits | Hybrid / flexible working