Controller

Our Mission Reflection is a research lab making intelligence open and accessible for everyone to use, customize, and build on. We build open models that let anyone control their intelligence and help shape the future of AI. Our mission: make intelligence open and accessible to all.

Role Overview As Controller, you’ll build the accounting function from the ground up. You own the close, technical accounting, financial reporting, and the internal controls that make all of it trustworthy. You’ll navigate complex deal structures across sovereign and enterprise contracts, manage the external audit relationship, and oversee equity accounting as our programs scale. You’ll own tax compliance and strategy, partner with legal and finance on entity structure, and build the accounting and tax teams beneath you. This role reports to the VP of Finance.

What You'll Do

• Own the month-end and quarter-end close — accuracy, timeliness, and improving both
• Lead all technical accounting determinations: revenue recognition, equity, leases, and novel deal structures
• Own global tax strategy, planning, and compliance — federal, state, and international
• Manage the external audit relationship end-to-end; own the audit timeline and deliverables
• Build and maintain internal controls and financial reporting infrastructure
• Partner with legal on entity structure and transfer pricing
• Oversee AP, AR, payroll, and treasury operations
• Build the accounting and tax teams beneath you

What We're Looking For

• 7-10+ years of relevant finance and accounting experience
• CPA required; Big 4 background strongly preferred
• Deep technical accounting expertise — ASC 606, ASC 718, ASC 842, ASC 360 and the judgment to handle what's not in the textbook
• Experience owning a close process and an audit at a high-growth technology company
• Demonstrated ability to build an accounting function from scratch, including team, systems, and processes
• Comfortable navigating ambiguity in deal structures and translating complexity into clear accounting positions
• Strong technical foundation in federal and international tax, with exposure to multi-entity or multinational structures
• International experience, including transfer pricing and cross-border operations

What We Offer We believe that to make intelligence open and accessible to all, you need to start at the foundation. Joining Reflection means building from the ground up as part of a talent-dense team. You will help define our future as a company, and help define the future of open foundational models.

We want you to do the most impactful work of your career with the confidence that you and the people you care about most are supported.

• Top-tier compensation: Salary and equity structured to recognize and retain our talent globally.
• Stock options: Everyone who joins and contributes to Reflection's success gets to share in the upside through stock options.
• Health & wellness: Comprehensive medical, dental, vision, and life, with an annual wellness allowance.
• Meals: Lunch and dinner are provided in the office daily.
• Life & family: 22 weeks paid parental leave for all new birthing and non-birthing parents, including adoptive and surrogate journeys.
• Vacation days: Unlimited paid time off in the U.S. and 30 days in the U.K.
• Sponsorship support: We sponsor visas to help exceptional talent join our team and support long-term immigration pathways where applicable.
• Team building: We have regular off-sites, happy hours, and team celebrations.

Export Control Notice: This position may require access to technology or source code subject to the U.S. Export Administration Regulations. Any offer of employment for this role may be conditioned on the Company's ability to provide the candidate with access to such technology or source code in compliance with applicable U.S. export control laws, which may require the Company to seek government authorization.