Frontend Engineer (React/TypeScript)
OnHires
Job Description
Job Description
Location: Remote (Europe)
Employment: Full-time
Our client is building a cutting-edge AI-powered cryptocurrency trading platform . The product delivers automated trading bots (DCA, Grid, Quantum), portfolio management tools, real-time market data, and multi-exchange integrations (Binance, Bybit, OKX, and others).
Their mission: to provide institutional-grade trading capabilities with consumer-grade UX — making advanced trading accessible, fast, and reliable.
???? What You’ll DoAs a Frontend Engineer, you’ll be at the center of creating an intuitive, high-performance trading experience:
Ship real-time trading features in React 18+ with TypeScript.
Design data flows with Redux Toolkit, Redux-Saga, and React Query (caching, optimistic updates, real-time sync).
Integrate APIs & live feeds via REST + WebSockets for order books, balances, and notifications.
Craft responsive UIs with Tailwind CSS + Styled Components, ensuring a seamless mobile-first experience.
Deliver rich visuals like candlestick charts, P&L dashboards, and live market visualizations using ApexCharts or similar.
Optimize performance with code-splitting, lazy loading, bundle budgets, and profiling.
Implement secure auth flows (JWT, OAuth, 2FA) and manage exchange API keys safely.
Contribute to internationalization (13+ languages, including RTL).
Raise the bar by mentoring peers, reviewing code, and shaping front-end architecture.
Solid expertise in React (18+) + TypeScript and modern ES2020+.
Hands-on experience with Redux Toolkit, Redux-Saga, and React Query in production.
Proven work on real-time systems (WebSockets, live market data, large datasets).
Experience with charting libraries (ApexCharts, Highcharts, D3, etc.) including live updates.
Strong understanding of performance optimization .
Awareness of secure authentication flows and API key management.
Leveling guidance:
Mid-level: ~3–5 years React/TS experience.
Senior-level: 5+ years with architectural or product-wide impact.
???? Impact > years of experience: if you can demonstrate senior-level contributions, you’ll be considered at that level.
Trading/fintech background (order forms, risk, real-time systems).
Testing with Jest + React Testing Library.
Familiarity with CI/CD pipelines.
Monitoring/analytics (Sentry, Datadog, PostHog).
Experience with PWAs or Web3/wallet integrations.
Problem-solving mindset in complex, data-heavy contexts.
Collaborative and proactive in Agile teams.
Clear communication, clean documentation, thoughtful peer reviews.
You’ll deliver high-impact features for a global trading audience, ensure the platform is fast, reliable, and secure , and shape the front-end architecture of a product scaling at speed.
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