Ostium is on a simple mission: make it possible for anyone with a digital wallet to trade stocks, commodities, currencies, and crypto with full transparency. No brokers, no freezes, no hidden spreads. We’re replacing the opaque, offshore brokerage model with a transparent, permissionless trading stack built onchain. Every trade, deposit, and withdrawal is verifiable through open, auditable code. We’ve raised $27.9M+ from General Catalyst, Jump, LocalGlobe, Susquehanna (SIG), GSR, Alliance DAO, Soma Capital, Balaji Srinivasan, Meltem Demirors, and others.

About the Role.

You'll work directly with our COO and Strategic Initiatives lead across finance, exchange and market data vendors, fundraising, legal coordination, and institutional relationships.

What You'll Do.

Exchange and data vendor ops

• Own our vendor relationships with some of the largest TradFi exchanges in the world, and market data providers

• Run the licensing, contracts, renewals, coverage, and cost across all of them

Analysis and planning

• Take strategic questions from the founders and come back with data and a recommendation

• Run quarterly planning: set targets with leadership, track them, keep them current

Finance ops

• Own financial operations across entities and jurisdictions

• Craft and execute appropriate incentives to manage capital with partner entities

Fundraising and investor ops

• Run the operational side of fundraising: data rooms, diligence requests, investor updates, closing mechanics, legal and documentation review

Legal, entity, and institutional ops

• Work with outside counsel on contracts, entity admin, and compliance

• Point of contact for funds, market makers, and institutional partners across verticals on diligence, docs, and onboarding

Who You Are.

• 3+ years in investment banking, consulting, or a high-growth startup

• Strong modeling and spreadsheet skills

• Clear communicator with counsel, banks, accountants, and institutions

• Comfortable owning problems end to end without a playbook

• You use AI tools in your daily work

• You love markets. Crypto and DeFi fluency is a plus, not a requirement

Compensation.

$170,000 $250,000 base, depending on experience.