Senior Software Engineer - Frontend - Consumer

🏢 About Kraken

Founded in 2011, Kraken (Payward) is one of the world's longest-standing and most secure cryptocurrency exchanges, trusted by more than 10 million individuals and institutions across the globe. Kraken offers spot trading, margin, staking, futures, and institutional OTC services, building modern financial infrastructure for an open, global economy.

🎯 The Role

The Consumer engineering team at Kraken owns the end-to-end trading and portfolio experience across web and mobile. As a Senior Frontend Software Engineer, you will design, build, and optimize high-trust consumer products that turn first-time curiosity into long-term engagement, partnering closely with Product, Design, Data, and Platform teams.

🛠️ Tech Stack

• Web & Mobile: React, React Native, TypeScript, Next.js (App Router, RSC), JavaScript (ES6+)
• Real-Time & State: WebSockets, Server-Sent Events (SSE), TanStack Router, Client Caching
• Testing & Tooling: Jest, React Testing Library, Playwright, Cypress, Vite, CI/CD
• Experimentation & AI: LaunchDarkly, Optimizely, Cursor, Claude Code

💼 What You'll Do

• Design and ship high-quality consumer features across web (React) and mobile (React Native) from discovery through production monitoring.
• Drive experimentation strategies: form hypotheses, run A/B tests, analyze telemetry, and iterate rapidly based on real user behavior.
• Build ultra-responsive real-time price feeds, charts, and transaction flows via WebSockets.
• Make sound architectural decisions regarding React Server Components, routing boundaries, and client state.
• Raise code standards through automated testing, accessibility (WCAG), performance profiling, and PR reviews.
• Incorporate structured AI-native development workflows (Cursor, Claude Code) into day-to-day engineering.

✅ What You'll Need

• 6+ years of professional software engineering experience building consumer-facing web and mobile applications.
• Deep mastery of TypeScript and the modern React ecosystem.
• Production experience building and releasing cross-platform mobile apps with React Native (iOS / Android).
• Hands-on experience with Next.js App Router and React Server Components.
• Proven track record with A/B testing, feature flagging, and experimentation frameworks.
• Experience working with WebSockets or SSE for real-time UI synchronization.
• Strong background in fintech, crypto, payments, or high-trust consumer applications.