Ostium

Ostium Labs

Executive Assistant & Office Manager

5-10 years supporting C-suite; experience in investment banking/hedge funds or high-growth startups; strong calendar/travel skills; highly organized; discreet; NYC office presence; proficient in Google Workspace, Slack, Notion.

QA Engineer

Solid experience testing web and mobile apps; familiar with DeFi primitives; automation testing with Cypress/Playwright; identify edge cases; read logs and file actionable bugs.

SDE2

Mid-level engineer with 3–5 years experience, proficient in Go and TypeScript, with APIs, databases, containerized deployments, testing, and distributed systems.

Quantitative Trading Analyst

Advanced mathematics/ statistics/ financial engineering with Python (pandas, numpy, scipy); knowledge of traditional finance derivatives and DeFi; experience building or auditing risk engines and margin models; SQL proficiency.

Title	Location	Date
Executive Assistant & Office Manager Full Time · 5+ YOE New York City, New York, United States · Onsite	New York City, New York, United States Onsite	Apr 19, 2026
QA Engineer Full Time · 2+ YOE United States · Remote	United States Remote	Apr 15, 2026
SDE2 Full Time · 3+ YOE Delhi, Delhi, India · Remote	Delhi, Delhi, India Remote	Apr 15, 2026
Quantitative Trading Analyst Full Time Europe · Remote	Europe Remote	Feb 23, 2026

Activities	Blockchain protocol developmentDecentralized exchange servicesPerpetual futures tradingFinancial derivatives platformReal-world asset tradingFinTechDecentralized Finance (DeFi)
Headquarters	US
Industries	Decentralized Finance (DeFi)FinTech
Name	Ostium
Employees	25
Type	Private
Tagline	Enables on-chain trading of stocks, commodities, and crypto assets.
Founded	2,022
Website	ostium.com
Latest Funding Round	Series A
Latest Funding Year	2,025
Latest Funding Amount	24,000,000
Latest Investors	General CatalystJump Crypto

Ostium

About Ostium