Senior Software Engineer

Kraken Digital Asset Exchange

Design, develop, and maintain high-quality consumer-facing features across web (React) and mobile (React Native), owning the full experience from concept to production monitoring.; Own the full lifecycle of product work, from discovery and…

Posted 7/8/2026Verified active Jul 25, 2026, 12:36 AMfull-timeRemote • 🇵🇱 PolandSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrated expertise in designing and developing high-quality consumer-facing web and mobile applications, with a strong focus on the React ecosystem and TypeScript. Proven ability to lead cross-platform initiatives, mentor engineers, and drive A/B testing and experimentation strategies to enhance product performance and user experience.

Highest-signal resume keywords

6+ Years of Software Development ExperienceDeep Expertise in TypeScriptProduction Experience with React NativeHands-on Experience with A/B TestingStrong Testing Culture with Jest and React Testing Library

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

ReactReact NativeTypeScriptNext.jsA/B TestingFeature FlagsWebSocketsJestReact Testing LibraryCypress

Soft Skills

MentoringCollaborationCommunicationProblem-SolvingContinuous Improvement

Tools & Technologies

LaunchDarklyOptimizelyViteWebpackCI/CD Pipelines

Industry Keywords

FintechCryptoPaymentsConsumer ProductsHigh-Trust Products

Tech Stack

Tools & technologies

CypressJestNext.jsReactReact nativeSdlcTypescriptWebpack

About the role

Key responsibilities & impact

Design, develop, and maintain high-quality consumer-facing features across web (React) and mobile (React Native), owning the full experience from concept to production monitoring.
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 forming hypotheses, designing experiments, analysing results, and iterating based on data.
Partner with Product, Design, Data, and Mobile engineers to create coherent experiences across Kraken’s consumer surfaces.
Make opinionated technical decisions on framework and architecture choices.
Set the standard for high-quality code — functional correctness, accessibility, performance, and testability are non-negotiables.
Mentor engineers across seniority levels and contribute to a culture of craft and continuous improvement.
Lead and collaborate on complex cross-platform initiatives, driving alignment across web and mobile surfaces.
Stay ahead of the curve on React ecosystem tooling, React Server Components, concurrent features, streaming, and bring those insights back to the team.
Work AI-natively, using AI tools across the full SDLC and maintaining a structured, opinionated workflow.

Requirements

What you’ll need

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, with opinions about state management, data fetching patterns, and component architecture.
Production experience with React Native and cross-platform mobile development, including App Store and Google Play release pipelines.
Experience with Next.js, specifically familiarity with 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 with Jest, React Testing Library, Playwright or Cypress, and the judgement to know when to use each.
Familiarity with modern build tooling (Vite, Webpack, CI/CD pipelines) and performance profiling.
Experience in fintech, crypto, payments, or other high-trust consumer products where correctness and user confidence matter.
Strong written and verbal English, capable of writing clear RFCs and explaining technical trade-offs to non-technical stakeholders.