Financial Controller

Ostium

Controller directing accounting operations and implementing financial frameworks at Ostium, a crypto neo-broker. Building robust systems for month-end close and audit readiness.

Posted 7/14/2026full-timeRemote • 🇺🇸 United StatesMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in US GAAP financials, crypto treasury management, and onchain reconciliation, with a strong ability to build finance functions in dynamic environments. Proficient in managing multi-entity accounting and external audits while ensuring compliance across jurisdictions.

Highest-signal resume keywords

CPA (Active)US GAAP FluencyCrypto/Digital Asset AccountingOnchain ReconciliationQuickBooks Proficiency

ATS Keywords

Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills

Financial Close ManagementMargin Book ReconciliationP&L ValuationFee and Revenue AccountingStablecoin ManagementAudit ReadinessTax CoordinationCash ManagementVendor ManagementEquity Compensation Accounting

Soft Skills

High AgencyProblem-SolvingProactive Communication

Tools & Technologies

Core ERPCrypto Subledger

Certifications & Qualifications

CPA (Active)

Industry Keywords

TradFiBroker-DealerHedge FundFund AdministratorDeFi Protocol RevenueWeb3 WalletMulti-Entity AccountingInternational ExperienceVC-Backed StartupCrypto Tax

Tech Stack

Tools & technologies

ERPWeb3

About the role

Key responsibilities & impact

Own the monthly and quarterly close across all entities, consolidating fiat and onchain activity into clean US GAAP financials on a predictable cadence.
Value the protocol's collateral pool, open positions, and P&L. Account for and reconcile fee, funding, spread, and liquidation revenue. Reconcile onchain state to the books daily, not monthly.
Own crypto treasury, stablecoin flows, wallet-level reconciliation, gas, and protocol revenue, while applying digital asset fair value treatment correctly.
Build the reconciliation and control environment from the ground up, wiring onchain data directly into the books. This is an AI-native function. You'll leverage tooling to reconcile at chain speed rather than throwing headcount at the problem.
Manage external auditors and drive first audit readiness. Coordinate crypto and multi-entity tax across jurisdictions. Support entity structuring.
Manage cash and stablecoin balances, runway, and collateral movements alongside trading and operations. Deliver investor and board reporting.
Own AP, payroll, vendor management, and equity/token compensation accounting.

Requirements

What you’ll need

CPA (Active): Deep US GAAP fluency and demonstrated ownership of a full audit-ready close.
Dual-Domain Fluency: Real, hands-on experience in both TradFi (positions, NAV, brokerage, or fund accounting) and crypto/digital asset accounting. You can reconcile a margin book and a Web3 wallet in the same afternoon. This is the non-negotiable spine of the role.
Relevant Environment: Experience at a broker-dealer, prime broker, hedge fund, fund administrator, or trading firm where you accounted for positions, margin, and mark-to-market, plus hands-on crypto-native accounting (onchain reconciliation, DeFi protocol revenue, stablecoins).
Onchain Fluency: You can read a block explorer, deeply understand wallets and smart contract interactions, and reconcile directly against onchain data as your absolute source of truth.
Systems: Fluency with a core ERP (QuickBooks) and a crypto subledger is important.
High Agency: You've built or materially rebuilt a finance function in a fast-moving, resource-constrained environment. You escalate with proposed fixes, not just variances, and you're perfectly comfortable being the entire function before you build a team.
Bonus: Multi-entity international experience, VC-backed startup audit and fundraising support, and deep expertise in crypto tax.

Benefits

Comp & perks

Highly competitive compensation package
Flexible work arrangements