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.

Role (New York / Full-Time)

We are seeking a Lead Frontend Engineer to own the client-side architecture of our trading interface. This role requires deep expertise in modern React/Next.js ecosystems and a mastery of Web3 integrations. You will lead technical decision-making for the frontend, ensuring high-performance data visualization for real-time trading.

Responsibilities

• Architecture & Leadership: Drive the strategic evolution of our client-side architecture and mentor the engineering team to enforce high standards of code quality and modular design.

• Web3 Integration: Architect robust, secure wallet connectivity and authentication systems to ensure seamless interaction with on-chain protocols.

• Performance: Optimize rendering pipelines and state management to handle real-time market data streams with sub-second latency.

• UI/UX Implementation: Lead the implementation of a scalable, responsive component library to deliver a complex, data-rich trading experience.

• Reliability: Own the platform's stability by establishing rigorous end-to-end testing frameworks and comprehensive production monitoring.

Requirements

• Frameworks: Deep experience with Next.js and React (v18+).

• Language: Strong proficiency in TypeScript.

• Web3: Experience with Wagmi, Viem, and Ethers.js for blockchain interaction.

• State Management: Proficiency with GraphQL (Apollo Client) and TanStack Query.

• Styling: Proficiency in Tailwind CSS and experience designing scalable component libraries.

Preferred Qualifications

• Previous experience in DeFi or trading platforms

• Understanding of perpetuals trading and RWA markets

• Contributions to open-source projects

• Experience with high-frequency trading systems or real-time data processing

• Experience integrating and customizing TradingView charts

• Understanding of perpetuals trading, RWA markets, and DeFi primitives.

• Experience with GraphQL Code Generator.

Benefits

• Competitive compensation package

• Opportunity to work with cutting-edge blockchain technology

• Collaborative environment with highly skilled team members

• Flexible work arrangements

• Professional development opportunities

This role is perfect for someone who is passionate about DeFi, enjoys working across the full technical stack, and wants to be part of building the future of on-chain RWA trading.

Interested candidates should submit their resume, GitHub profile, and any relevant project examples demonstrating their front stack expertise.