Frontend Engineer

Koinly

Frontend Staff Engineer owning React and TypeScript development for Koinly’s crypto tax and asset-tracking platform. Optimizing complex financial data experiences and frontend architecture for global crypto investors.

Posted 8/10/2026full-timeRemote • 🇬🇧 United KingdomLead💰 $80,000 - $120,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building and optimizing complex, data-heavy web applications using modern React and TypeScript. Capable of leading frontend strategies, ensuring high-quality code, and collaborating effectively with product and design teams.

Highest-signal resume keywords

Expert-Level TypeScriptDeep React ExperienceProduction-Level Experience with React 19Experience with Tailwind CSS v4Experience with Blockchain Libraries

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

TypeScriptReactReact 19Tailwind CSSVitePostgreSQLHighchartsSentryRabbitMQRedis

Soft Skills

Attention to DetailCreative Problem SolvingLeadership

Tools & Technologies

AI Development ToolsTanStack RouterPlaywrightStorybookJIRA

Industry Keywords

Crypto Tax DataDeFi ReconciliationsBlockchain TechnologyFinancial ProductsOn-Chain Operation

Tech Stack

Tools & technologies

HerokuNode.jsPostgresRabbitMQReactReact NativeRedisRubyTypeScript

About the role

Key responsibilities & impact

Own frontend features end-to-end for a high-performance experience with complex crypto tax data
Optimize, refactor, and elevate the existing frontend codebase
Deliver critical new features for a high-performance interface handling massive datasets and complex DeFi reconciliations
Work across a modern React web application and a distributed data-processing backend
Expand scope to a React Native mobile app in the future
Write high-quality code and make sound architectural decisions
Lead by example and raise the bar for the frontend team
Work closely with Product and Design as the primary frontend partner for Product
Evaluate ideas technically and propose creative solutions
Own frontend strategy and product outcomes
Ensure reliable cross-browser behavior and pixel-level visual precision

Requirements

What you’ll need

8+ years of experience with a focus on complex, data-heavy web applications
Deep understanding of modern, complex web application architecture and scalable design patterns
Strong attention to detail and advanced frontend styling skills
Reliable cross-browser behavior and pixel-level precision
Fluency with AI development tools such as Claude, Codex, and Cursor
Expert-level TypeScript
Deep React experience, including React internals, performance optimization, and modern tooling
Production-level experience with React 19 and React Compiler
Strict, modern TypeScript
Experience with TanStack Router, Query, and Table
Experience with Radix UI and Mantine
Experience with Tailwind CSS v4, class-variance-authority, and tailwind-merge
Experience with Vite, Vitest, Playwright, Storybook, and Chromatic
Experience with Highcharts and Sentry
Experience with Bun, oxlint, and Biome
Experience with csv-parse, xlsx/SheetJS, and node-html-parser
Experience with blockchain libraries, RabbitMQ, and Redis/ioredis
Experience with PostgreSQL, Heroku, GitHub, and JIRA
Must be located in Europe / EU or UK timezones; applications from outside Europe will not be reviewed
Background check required before joining
Nice to have: React Native mobile application experience
Nice to have: Public GitHub or similar project portfolio
Nice to have: Financial products background
Nice to have: Blockchain and crypto technology experience
Nice to have: Ruby familiarity
Nice to have: Understanding of DeFi protocols and on-chain operation
Nice to have: Knowledge of the Koinly product

Benefits

Comp & perks

32 days PTO (incl. public holidays)
Remote-first and async-first work environment
Long blocks of deep work time
Autonomy to make architectural decisions
Direct impact on a product used by hundreds of thousands of investors
Background checks required before joining