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Front-End Developer (Full-Time, Remote)
Front-End Developer (Full-Time, Remote)Horizon Asset Investments • United Kingdom
Front-End Developer (Full-Time, Remote)

Front-End Developer (Full-Time, Remote)

Horizon Asset Investments • United Kingdom
7 days ago
Job type
  • Full-time
  • Remote
Job description

Front-End Developer (Full-Time, Remote)

We are seeking a Front-End Developer to design and build the user-facing components of our high-performance trading platform. You will play a key role in creating intuitive, data-rich interfaces that enable traders and analysts to work efficiently and effectively.

You will collaborate closely with the Back-End Development Team and the Project Manager to deliver seamless, integrated systems. A key factor is the front end developer’s ability to deeply discuss approaches, trade-offs, limitations, and pros / cons with the development team, rather than reliance on any specific pattern or library.

Key Responsibilities

  • Develop and maintain the front-end applications of our trading platform.
  • Collaborate with back-end developers and the project manager to ensure smooth integration across systems.
  • Design and implement multi-page layouts, menus, and workflows that balance usability with efficiency.
  • Contribute to the design and user experience of the trading platform, performance & risk manager, and backtesting engine.
  • Implement and optimize charting and data visualization features, leveraging libraries such as TradingView or D3.js to support a wide variety of chart types (tables, multi-line chart packs, etc.).
  • Continuously refine the UI / UX to ensure clarity, speed, and intuitive navigation for end users.

Qualifications

  • Strong communication skills and the ability to collaborate effectively with developers, project managers, and business stakeholders.
  • A keen eye for design, simplicity, and efficiency, with the ability to translate complex requirements into clean, user-friendly interfaces.
  • Knowledge of financial systems or trading concepts is preferred.
  • Core stack (mandatory)

  • React 18 + Next.js (App Router), TypeScript, TailwindCSS.
  • Strong command of state management for high-frequency data (e.g., Zustand, Redux Toolkit, useSyncExternalStore).
  • Real-time data & performance

  • Hands-on with WebSockets / SSE and reconnection / backoff strategies; handling authenticated socket connections and topic resubscriptions.
  • Experience implementing backpressure, buffering, coalescing, and windowing to prevent UI thrash under thousands of updates / minute.
  • Data virtualization (react-virtualized, react-window) for large tables (orders, positions, trades).
  • Familiar with Web Workers / OffscreenCanvas and message passing to keep the main thread responsive.
  • Awareness of latency budgets and frame-time profiling using React DevTools and browser performance tools.
  • Charting & visualization

  • Practical experience with professional charting libs (e.g., TradingView Charting Library, Lightweight Charts, Highcharts, D3).
  • Real-time overlays : best bid / ask, order book depth, last OHLCV, order / position annotations.
  • Multi-pane layouts (price, volume, indicators) with synchronized crosshairs and time scales.
  • Architecture & data access

  • Client-side caching and invalidation (e.g., TanStack Query / React Query).
  • Schema-driven UI for instruments and venues.
  • Use of Error Boundaries, Suspense, and progressive hydration / streaming for large Next.js pages.
  • Auth, security, and roles

  • Strong understanding of OIDC / JWT flows, token refresh / rotation, and WebSocket authentication.
  • Role-based feature gating (read-only vs trading permissio
  • Testing, quality, and reliability

  • Unit tests for critical transforms / parsers (e.g., Playwright / Vitest for E2E / interaction flows)
  • Experience with feature flags, staged rollouts, and monitoring with Sentry / OpenTelemetry.
  • Nice-to-haves

  • Experience with desktop-class layouts (drag-to-dock panels, resizable grids).
  • Exposure to WASM for heavy computations (e.g., indicator calculations).
  • Familiarity with FIX / crypto venue nuances (tick sizes, lot sizes, trading sessions).
  • Role Details

    Type : Full-Time

    Location : Remote

    Engagement : Ongoing collaboration with a small, fast-moving development team

    Compensation : Competitive; based on experience

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