Controller

Build the future of offensive security with XBOW. Attackers are already using AI to move faster than defenders can react—we’re creating the platform that puts security ahead in the arms race. Our AI-powered system autonomously discovers, validates, and even exploits vulnerabilities, giving organizations proof-backed results in hours instead of weeks.

Founded by Oege de Moor, creator of GitHub Copilot, and backed by Sequoia, Altimeter, and other leading investors, XBOW is applying cutting-edge AI to one of the world’s most urgent problems. In just over a year, our AI, built by a world-class AI team and legendary security researchers — has uncovered thousands of real-world zero-days across the software billions rely on, and achieved the #1 ranking on HackerOne’s global leaderboard.

We’re a team of builders, hackers, and researchers who thrive on solving problems others think are impossible. If you want to push the boundaries of AI, reshape how security is done, and join the group defining this new era of defense — we’d love to talk.

We’re looking for a Controller to build and scale XBOW’s accounting, tax, and financial operations from the ground up. In this role, you’ll take ownership of core accounting processes, revenue recognition, multi-jurisdictional compliance, and financial reporting that guides critical strategic decisions. You’ll work closely with our Head of Finance, People, Legal, and cross-functional teams to establish best-in-class systems, controls, and workflows that support XBOW’s rapid growth.

This role is for someone who enjoys turning ambiguity into structure, leading both execution and strategy, and building financial foundations that can scale globally.

• Oversee monthly close and ensure timely, accurate financial reporting in partnership with external accountants.

• Develop and enforce GAAP-compliant accounting policies and procedures.

• Manage AP, AR, and collections processes with third-party providers.

• Revenue accounting: Partner with the Head of Finance on revenue recognition, contract review, and cost management.

• Collaborate with the People team on payroll, commissions, and expense reimbursements.

• Lead the relationship with external accounting firms; build and scale an internal accounting team over time.

• Coordinate tax and compliance filings across multiple jurisdictions (US, UK, Malta) with external advisors.

• Establish internal controls and documentation in preparation for the company’s first GAAP audit.

• Manage statutory audits and local compliance requirements as needed.

• Assist in entity management/compliance across multiple jurisdictions.

• Support the Head of Finance in maintaining forecast and budget models that guide strategic decisions.

• Contribute to fundraising, due diligence, and financial audits.

• Manage cap table data and support equity administration alongside General Counsel and Finance leadership.

• Own the design, selection, and implementation of the financial operations stack (ERP, billing, revenue recognition, AP/AR, sales tax, etc.).

• Drive process automation and documentation to scale operations efficiently.

• Implement sales tax compliance software and oversee collection processes and filings.

• Partner cross-functionally with Sales, Customer Success, Legal, and Finance to align the full quote-to-cash cycle
  

Essential:

• Have previously built accounting systems and processes from 0-1 at a high-growth start-up (or equivalent experience scaling financial operations through hypergrowth periods). Experience setting up processes on Quickbooks, Brex, and Fathom.

• Comfort with ambiguity and ability to create structured workflows in complex and evolving contexts. Keen attention to detail.

• Player-coach - as comfortable as an individual contributor as you are building out and managing a team, working cross-functionally and managing vendors.

• Experience managing several entities, and tax/compliance reporting in multiple jurisdictions.

• Strong desire to build automated and highly scalable processes to support rapid growth.

• Deep expertise in GAAP, ASC 606, and related standards.
  

Advantageous:

• Experience in security, deep-tech, or enterprise software environments.

• Prior experience navigating first-time audits, GAAP conversions, or rapid international expansion.

• Experience implementing billing, revenue recognition, or tax automation systems.

• Startup experience and comfort with ambiguity, urgency, and rapid iteration.
  

What we offer

• Compensation & Equity: Competitive salary and a generous equity package, making you a true owner of the company.

• Career Growth: Shape your role, lead the function, and grow with the company as we redefine cybersecurity.

• Meaningful Work: You will tackle technically complex challenges and play a pivotal role in the growth of our business, working alongside an amazing team and some of the world’s experts to shape how AI transforms cybersecurity.

• Location: Remote (all team members are remote but we meet regularly and you’re supported to travel to collaborate with colleagues in person)

• Contract: Full-time.

• Hiring Process:

  1. 45-min introductory chat with our Head of Talent, Zac Wallis.

  2. 60 minutes with our Head of Finance & BizOps, Jordan McTaggart.

  3. 2-3 hour deep dive session with two members from the team.

  4. 30-min final meeting with our CEO and founder, Oege de Moor.

We aren't focused on seniority titles at XBOW—so if you’re worried about “leveling,” don’t be. We care a lot more about mission fit, capability, and impact than what’s on your LinkedIn headline.

We believe in people who are driven by curiosity and a willingness to learn. Even if you don't check every box, we encourage you to apply if you're excited about the role and our mission.