Senior Frontend Engineer

USA

Engineering /

Remote

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JTX is our trading app, and it runs on the fastest market infrastructure on Solana, which we also built. What nobody has done yet is make that speed something a trader can feel. That is this job.

JTX is live. Two frontend engineers built it to this point and you would be the third. The work now is one to a hundred: harden what exists, make it hold up under real volume, expand onto mobile, and raise the ceiling on every screen a trader touches.

We're a small team with product-market fit. That means:

* High ownership: every team member drives significant technical decisions and shapes our product roadmap. * Fast execution: we ship rapidly and iterate based on real-world feedback. Progress, not motion. * High quality bar: the details are the product. We don't trade them for speed.

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