Source description
About the role
Job purpose We’re looking for a contract UI-focused React developer to help build and refine analytical, data-driven web applications for a quantitative trading firm. This role is hands-on and implementation-driven, working in production React codebases where data visualization, performance, and correct client/server separation are critical
Key responsibilities • Building and maintaining UI components in React + TypeScript • Developing data visualization and analytical interfaces (tables, charts, dashboards) • Implementing responsive layouts and design systems using Tailwind CSS • Working within applications that mix server-side and client-side logic • Making informed decisions about what belongs on the client vs. the server • Integrating UI with backend APIs that serve time-series and quantitative data • Optimizing rendering performance for large datasets and frequent updates • Debugging issues related to async data, re-renders, and UI state consistency
Key competencies Required Skills • Strong experience with React and TypeScript • Clear understanding of client vs. server responsibilities in modern React apps • Experience building data-heavy UIs (tables, charts, filters, dashboards) • Comfortable working with asynchronous data flows and state management • Solid command of Tailwind CSS and responsive design patterns • Ability to reason about performance, memoization, and rendering efficiency • Able to work independently in an existing, complex codebase Nice to Have • Experience with financial, trading, or analytical applications • Familiarity with charting or visualization libraries (e.g. ECharts, Chart.js) • Experience handling time-series data or streaming updates • Strong attention to UI precision and data accuracy • Experience collaborating via Git (PRs, reviews, async communication)
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