SOFTWARE ENGINEER, FRONTEND

Onyx is building a consumer platform for taking positions on sports, prediction markets, crypto, financial markets, and more. We are hiring a Frontend Software Engineer to build customer-facing interfaces using TypeScript and React, working closely with product, design, and backend teams.

• Build and ship customer-facing web experiences using TypeScript and React.
• Develop intuitive experiences across market discovery, trading, positions, balances, payments, and settlement.
• Build responsive interfaces powered by live prices, market updates, and real-time activity.
• Own features from technical design through testing, release, monitoring, and iteration.
• Translate complex trading concepts into simple, engaging product experiences.
• Build reusable components and contribute to a scalable design system.
• Establish frontend architecture and engineering patterns that support rapid development.
• Integrate APIs, authentication, payments, analytics, and third-party services.
• Improve performance, accessibility, reliability, testing, and deployment.
• Partner with product and design to deliver polished experiences across browsers, devices, and screen sizes.

• 3+ years of professional frontend or full-stack engineering experience.
• Highly proficient in TypeScript, React, HTML, and CSS.
• Built and maintained customer-facing production applications.
• Understand frontend architecture, state management, data fetching, testing, and performance.
• Experience with APIs, real-time data, authentication, and third-party SDKs.
• Build responsive, accessible interfaces with strong attention to detail.
• Can independently own complex features from idea through production.
• Move quickly while maintaining a high bar for quality and customer experience.
• Even Better: Built products in trading, crypto, payments, prediction markets, gaming, or consumer fintech.
• Even Better: Experience with WebSockets, live market data, streaming systems, or transaction-based applications.
• Even Better: Built data visualizations, charts, trading interfaces, or interactive dashboards.
• Even Better: Experience with Next.js, design systems, and component libraries.
• Even Better: Familiarity with Node.js and backend development.
• Even Better: Helped scale a high-traffic consumer application during rapid growth.

• Fully covered medical, dental, and vision insurance.
• Meaningful equity ownership.
• Commuter benefits.