Senior Software Engineer - Frontend - Consumer

Poland, Remote. Posted 15 days ago

The role

This person will design, develop, and maintain consumer-facing features across web and mobile surfaces. They will own the full product lifecycle from discovery to production monitoring and drive experimentation strategies.

What you will do

Design, develop, and maintain high-quality consumer-facing features across web (React) and mobile (React Native)
Own the full lifecycle of product work from discovery and technical design through release, monitoring, experimentation, and iteration
Drive A/B testing and experimentation strategies
Partner with Product, Design, Data, and Mobile engineers
Make opinionated technical decisions on framework and architecture choices
Set the standard for high-quality code regarding functional correctness, accessibility, performance, and testability
Mentor engineers across seniority levels
Lead and collaborate on complex cross-platform initiatives
Stay ahead of the curve on React ecosystem tooling
Work AI-natively using AI tools across the full SDLC

Required qualifications

6+ years of professional software development experience with a strong focus on consumer-facing web and/or mobile products
Deep expertise in TypeScript and the React ecosystem
Production experience with React Native and cross-platform mobile development, including App Store and Google Play release pipelines
Experience with Next.js, specifically App Router, React Server Components, and client/server boundary decisions
Hands-on experience with A/B testing, feature flags, and experimentation frameworks (LaunchDarkly, Optimizely, or similar)
Experience with WebSockets or Server-Sent Events for real-time UI updates
Strong testing culture Jest, React Testing Library, Playwright or Cypress
Familiarity with modern build tooling (Vite, Webpack, CI/CD pipelines) and performance profiling
Experience in fintech, crypto, payments, or other high-trust consumer products
Strong written and verbal English
An active AI-assisted development workflow, Cursor, Claude Code, Copilot, or equivalent

About the company

Payward is the parent company behind Kraken, NinjaTrader, Breakout, xStocks, Payward Services and CF Benchmarks. Kraken is a crypto platform trusted by over 10 million individuals and institutions globally.