Software Engineer II - Frontend - Pro

The Pro team owns Kraken's flagship trading web application - a high-performance, real-time React app that serves multiple product surfaces from a single web codebase: Spot trading, Margin, Futures, Equities, Earn, and many more. The application receives a heavy stream of live updates (order books, tickers, balances, positions, fills) and must remain responsive and stable under sustained load. The team is globally distributed, codes in TypeScript and React, and is responsible for shipping features, defending performance, stability, and keeping the production application observable through Sentry, Mixpanel and structured logging.

The opportunity

• Leverage LLM's to accelerate development while still producing production-ready code.
• Leverage LLM's to build agentic flows to automate tasks and improve productivity.
• Design, develop and maintain features in a large, multi-product React web application used by professional traders globally.
• Own performance end to end: profile, measure and optimise real-time UI updates (tables, order books, charts, order forms) so the app stays responsive under heavy WebSocket throughput.
• Build and evolve the WebSocket and Web Worker layer that powers live market data, balances, positions and order updates across the app.
• Set the standard for high-quality code through reviews, mentorship and constructive feedback to engineers across the team.
• Contribute to technical strategy: architecture, data flow, state management, component design and shared libraries used across the trading surfaces.
• Safeguard performance improvements with regression-resistant patterns, instrumentation, dashboards and alerts, so wins do not silently erode over time.
• Own observability for the features you ship: meaningful Sentry instrumentation, Mixpanel events, structured logs and actionable alerts.
• Write integration and component tests.
• Drive process improvements (engineering practices, tooling, build pipeline, AI-assisted workflows) and lead by example.

• 4+ years of experience in software development, with a focus on production web applications.
• Deep understanding of JavaScript/TypeScript and strong proficiency with the modern React ecosystem.
• Experience building real-time UIs with WebSockets and Web Workers.
• Strong React and JavaScript performance skills.
• Experience working with LLM coding tools (Cursor, Claude, Copilot or similar) to accelerate development while still producing production-ready code.
• Hands-on experience with React Query or similar.
• Practical experience with production user monitoring and observability.
• Experience with frontend testing at multiple levels.
• Comfortable with feature flagging and progressive rollouts.
• Familiarity with modern frontend build pipelines and tooling (rsbuild/webpack/SWC, monorepos, TypeScript project references, ESLint, Prettier, Husky).
• Strong understanding of UI/UX best practices and design-system driven development.
• Experience within a large technology organization or fast-growing startup.
• Strong written and verbal communication skills in English.

Our Krakenites are a world-class team with crypto conviction, united by our desire to discover and unlock the potential of crypto and blockchain technology. What makes us different? Kraken is a mission-focused company rooted in crypto values. As a Krakenite, you'll join us on our mission to accelerate the global adoption of crypto, so that everyone can achieve financial freedom and inclusion. For over a decade, Kraken's focus on our mission and crypto ethos has attracted many of the most talented crypto experts in the world. Before you apply, please read the Kraken Culture page to learn more about our internal culture, values, and mission. We also expect candidates to familiarize themselves with the Kraken app. Learn how to create a Kraken account here. As a fully remote company, we have Krakenites in 70+ countries who speak over 50 languages. Krakenites are industry pioneers who develop premium crypto products for experienced traders, institutions, and newcomers to the space. Kraken is committed to industry-leading security, crypto education, and world-class client support through our products like Kraken Pro, Desktop, Wallet, and Kraken Futures. Become a Krakenite and build the future of crypto!