Senior Software Engineer - Frontend - Consumer

kraken.com; United States; Remote; USD 140,000 - 190,000; Full time

Job summary

Kraken is seeking a senior frontend engineer to build consumer web and mobile experiences for users managing digital assets. You will own product work from discovery to release and iterate with product, design, data, and mobile colleagues.

You bring deep TypeScript and React expertise, production React Native experience, and fluency with Next.js App Router and server components. You will drive performance, accessibility, and testing practices.

Qualifications

• 6+ years of professional software development for web or mobile products.
• Deep TypeScript and React expertise with clear trade-offs in state management and data fetching.
• Production React Native experience including mobile app release pipelines.
• Experience with Next.js App Router and React Server Components.
• Familiarity with A/B testing, feature flags, and experimentation frameworks.
• Knowledge of WebSockets or server-sent events; testing tools like Jest and Playwright; build/CI/CD tooling; performance profiling.
• Strong written and spoken English with ability to explain technical concepts to non-technical partners.
• Active AI-assisted development workflow and responsibility for generated code.

Responsibilities

• Design, build, and maintain customer-facing features for web and mobile apps.
• Own product changes from discovery through launch, monitoring, and follow-up experiments.
• Form hypotheses, run A/B tests, analyze results, and use findings to improve experiences.
• Collaborate across product, design, data, and mobile engineering to ensure cross-platform coherence.
• Make architecture and framework decisions, including routing and client-server boundaries.
• Maintain high standards for correctness, accessibility, performance, and testability; mentor colleagues and lead cross-platform initiatives.

Skills

TypeScript

React

React Native

Next.js App Router

Server Components

A/B testing

WebSockets

Jest

Playwright

CI/CD tooling

Performance profiling

English communication

AI-assisted development

Tools

Jest

Playwright

CI/CD tooling

Web performance tools

Job description

Role overview

Build consumer-facing web and mobile experiences for people buying, selling, and managing digital assets. This senior frontend role owns product work across the full lifecycle—from discovery and technical design to release, monitoring, experimentation, and iteration—and works closely with product, design, data, and mobile colleagues. The team values measurable outcomes, accessible and performant interfaces, and sound cross-platform engineering decisions.

Responsibilities

• Design, build, and maintain customer-facing features for web and mobile applications.
• Own product changes from discovery and technical planning through launch, monitoring, and follow-up experiments.
• Form hypotheses, run A/B tests, analyze results, and use findings to improve the experience.
• Partner across product, design, data, and mobile engineering to keep experiences coherent across platforms.
• Make and explain architecture and framework decisions, including choices around routing and client-server boundaries.
• Maintain high standards for correctness, accessibility, performance, and testability; mentor colleagues and lead cross-platform initiatives.

Requirements

• At least 6 years of professional software development focused on consumer web or mobile products.
• Deep TypeScript and React expertise, with the ability to explain trade-offs in state management, data fetching, and component design.
• Production React Native experience, including mobile app release pipelines.
• Experience with Next.js App Router, React Server Components, and client-server boundaries.
• Practical experience with A/B testing, feature flags, and experimentation frameworks.
• Familiarity with WebSockets or server-sent events, testing tools such as Jest and Playwright, build and CI/CD tooling, and performance profiling.
• Strong written and spoken English, including clear technical proposals, code review feedback, and explanations for non-technical partners.
• An active AI-assisted development workflow and the judgment to review and take responsibility for generated code.

Nice to have

• Experience in financial technology, digital assets, payments, or another high-trust consumer product.