Senior Frontend Engineer - JTX

This is an opportunity to shape the user experience of a high-performance trading application built on Solana's fast market infrastructure. As the third frontend engineer on a live product, you will help scale an established platform by strengthening its architecture, improving performance, and expanding its capabilities across web and mobile. You will build sophisticated, real-time trading interfaces that make market data, order execution, and trading outcomes clear and intuitive. Working closely with product, design, and infrastructure teams, you will make technical decisions that influence the platform's long-term direction. The environment combines high ownership, rapid iteration, and a strong commitment to product quality, security, and performance. This role is ideal for a frontend engineer who thrives on complex technical challenges and wants to build responsive, reliable tools for demanding traders.

• At least 5 years of professional experience building and maintaining production frontend applications, ideally involving real-time systems, data-intensive interfaces, or financial products.

• Deep expertise in React and TypeScript, including component architecture, state management, rendering behavior, and performance optimization.

• Experience building mobile applications using React Native, Expo, or native iOS and Android technologies.

• Strong understanding of browser performance, memory management, WebSockets, network behavior under load, and responsive interfaces with frequent data updates.

• Experience designing or maintaining complex frontend data flows where freshness, consistency, and accurate representation of asynchronous states are essential.

• A strong security mindset, particularly around wallet integrations, transaction signing, authentication, key handling, and protecting sensitive information from logs and unintended exposure.

• Ability to work confidently in an established, live codebase, improving architecture and refactoring existing systems without disrupting product delivery.

• Strong product judgment and attention to detail, with the ability to identify interface issues, improve usability, and maintain a high standard of visual and functional quality.

• Ability to balance business priorities with engineering trade-offs, communicate complex technical concepts clearly, and make sound decisions independently.

• Comfort working in a small, fast-moving engineering team where ownership, execution, prioritization, and accountability are essential.

• Experience in one or more of the following areas is advantageous: trading terminals, exchange or brokerage platforms, consumer fintech applications, charting and time-series visualization, canvas or WebGL rendering, Solana or EVM application development, wallet integrations, transaction signing, public TypeScript libraries, or design systems.