Own and build the JTX frontend across web and mobile: real-time order books, charts, order entry, positions, wallet/signing flows. Optimize for low-latency streaming data, performance, security, and cross-platform consistency while making long-term architectural decisions and shipping rapidly.
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.
About the Position
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
What We're Looking For
- 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
Relevant Background
- 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
If you have experience in any of the following, you may be a good fit:
Similar Jobs
Artificial Intelligence • Fintech • Insurance • Marketing Tech • Software • Analytics
Handles inbound calls and warm leads, consults customers on insurance needs, recommends appropriate Property and Casualty coverage, and converts prospects into policyholders. The role includes paid training and licensing support, requires a flexible weekday and weekend schedule, and is performed remotely with employer-provided equipment and specified high-speed internet requirements.
Top Skills:
Cable/Fiber/Dsl InternetPcWired High-Speed Internet
Cloud • Information Technology • Productivity • Security • Software • App development • Automation
Build and ship high-quality frontend software from technical design through launch. Develop efficient, scalable, testable client code; collaborate with engineering, design, and product teams to solve customer problems; contribute to code reviews and documentation; and resolve complex bugs while delivering intuitive product experiences.
Cloud • Information Technology • Productivity • Security • Software • App development • Automation
Partners with sales teams to support mid-market customers throughout the pre-sales cycle. Conducts discovery, identifies business problems, maps needs to Atlassian products, leads customized value-based demonstrations, guides technical decisions, expands cross-product opportunities, and builds executive relationships. Tracks customer feedback and competitive intelligence, collaborates with product management, and continuously develops product, solution, platform, and sales expertise.
Top Skills:
Artificial IntelligenceAtlassian ProductsAtlassian SoftwareCloud Computing
What you need to know about the Los Angeles Tech Scene
Los Angeles is a global leader in entertainment, so it’s no surprise that many of the biggest players in streaming, digital media and game development call the city home. But the city boasts plenty of non-entertainment innovation as well, with tech companies spanning verticals like AI, fintech, e-commerce and biotech. With major universities like Caltech, UCLA, USC and the nearby UC Irvine, the city has a steady supply of top-flight tech and engineering talent — not counting the graduates flocking to Los Angeles from across the world to enjoy its beaches, culture and year-round temperate climate.
Key Facts About Los Angeles Tech
- Number of Tech Workers: 375,800; 5.5% of overall workforce (2024 CompTIA survey)
- Major Tech Employers: Snap, Netflix, SpaceX, Disney, Google
- Key Industries: Artificial intelligence, adtech, media, software, game development
- Funding Landscape: $11.6 billion in venture capital funding in 2024 (Pitchbook)
- Notable Investors: Strong Ventures, Fifth Wall, Upfront Ventures, Mucker Capital, Kittyhawk Ventures
- Research Centers and Universities: California Institute of Technology, UCLA, University of Southern California, UC Irvine, Pepperdine, California Institute for Immunology and Immunotherapy, Center for Quantum Science and Engineering
