> Markdown version of [/jobs/ext/2708419-frontend-engineer](https://www.wearedevelopers.com/jobs/ext/2708419-frontend-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Frontend Engineer - **Company:** JTX LLC. - **Location:** United States (Remote available) - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** IOS Applications, Next.js, Software Engineering, TypeScript, WebSocket, WebGL, Tailwind, ReactJS, Data Layers, React Native, Front End Software Development - **Published:** September 4, 2026 - **Apply:** https://startup.jobs/senior-frontend-engineer-jtx-jito-labs-8817319 ## About the Role * Attention to detail bordering on obsessive. You can look at a screen and say what is wrong with it, and it bothers you until it's fixed. * 5+ years building production frontend, including something real-time, data dense, or financial * Deep React and TypeScript. You can explain why a component re-rendered and then fix it. * Mobile experience: React Native, Expo, or native iOS and Android * Strong fundamentals: browser performance, memory, websockets, network behavior under load * Security-first instincts around signing flows, key handling, and what should never touch a log * Comfortable in a codebase that is already live. You can refactor and clean up without stopping shipping. * Able to weigh business and engineering tradeoffs, and to explain complicated things simply, * Trading terminals, exchange or brokerage frontends * Consumer fintech apps at scale * Charting, time series, or high-frequency data visualization (canvas, WebGL) * Solana or EVM app development, wallet integrations, transaction signing * Maintaining a public TypeScript library or design system ## Description You'll own the surface of JTX across web and mobile: order entry, market data, charts, positions, execution quality, onboarding, and the wallet flows underneath all of it. The role suits a generalist with strong taste. You'll partner with design, product, and the infrastructure team, and you'll make architectural calls that stick for years. If you've spent time thinking about how markets actually work on Solana and want to build the product layer on top of that, this is the role. Stack: React 19 + TypeScript on Next.js. Jotai + TanStack Query. Tailwind with a token-based design system. TradingView Advanced Charts on our own datafeed. Privy wallets. WebSockets to our engine. Web ships as a PWA; native mobile apps are in development. What's Hard Right Now * Data freshness: several live WebSocket streams (order book, trades, candles, stats) feed many panels at once; keeping them fast, consistent with each other, and honest through async gaps (stale quotes, pending fills) * Performance: a data-dense terminal that stays smooth under constant streaming updates, including on mid-range hardware * Security: wallet signing, session auth, strict CSP, hardened supply chain * Shipping volume: three engineers own the entire surface of a live exchange; the backlog is bigger than the team, so throughput and prioritization are part of the job * Keeping product behavior and design language consistent between web and mobile while being very attentive to nuances of each mobile platform * Making execution quality something a trader can see in a glance instead of something they take on faith What You'll Do * Build and own the JTX client across web and mobile * Ship real-time trading interfaces: order books, charts, order entry, positions, fill and execution visibility * Hit tight latency and render budgets against streaming market data, and decide what belongs on the client versus the server * Build wallet and signing flows, including self-custodial and embedded wallet onboarding * Own the shared component, state, and data layers the rest of the product team builds on * Make architectural decisions that hold as the codebase, the team, and the user base grow by an order of magnitude * Ship fast, watch real users, iterate ## Related Videos - [Watch Tests Go Brrrr! : Getting Started with Cypress in ReactJS](https://www.wearedevelopers.com/videos/282-watch-tests-go-brrrr-getting-started-with-cypress-in-reactjs) - [GraphQL + Apollo + Next.js: A Lovely Trio](https://www.wearedevelopers.com/videos/311-graphql-apollo-next-js-a-lovely-trio) - [But, you're not Facebook](https://www.wearedevelopers.com/videos/378-but-you-re-not-facebook) - [Rendering Design Software in the Browser at Penpot](https://www.wearedevelopers.com/videos/1353-rendering-design-software-in-the-browser-at-penpot) - [From Zero to Hero: NextJS 13 and Tailwind CSS for Beginners](https://www.wearedevelopers.com/videos/766-from-zero-to-hero-nextjs-13-and-tailwind-css-for-beginners) - [Microfrontends at Scale](https://www.wearedevelopers.com/videos/236-microfrontends-at-scale) ## Related Articles - [16 Best Free React UI Libraries in 2025](https://www.wearedevelopers.com/magazine/148-16-best-free-react-ui-libraries-in-2025) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [The Best 7 Frontend Frameworks for Developers in 2025](https://www.wearedevelopers.com/magazine/400-the-best-7-frontend-frameworks-for-developers-in-2025) - [25 Essential Tools for Front End Developers](https://www.wearedevelopers.com/magazine/210-25-essential-tools-for-front-end-developers) - [Dev Digest 133 - Back to Front](https://www.wearedevelopers.com/magazine/474-dev-digest-133-back-to-front) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers)