Frontend Product Engineer (TypeScript + React)

Company: Koinly
Apply for the Frontend Product Engineer (TypeScript + React)
Location: Greater London
Job Description:

Build the interface for crypto tax compliance Koinly helps people do their crypto taxes without losing their minds. The bar is simple to describe and hard to deliver: a user should be able to reconcile thousands of transactions and file their taxes in under 20 minutes.

In this role, the frontend isn’t just a “skin” for an API. It’s where the tax logic meets the user. You won’t just be styling buttons; you’ll be building a high-performance interface that handles massive datasets and complex DeFi reconciliations.

We’re a remote-first, async-first startup with deep product-market fit. If you value autonomy, technical excellence, and clear communication over meetings and process complexity, Koinly is the place for you.

Read On For Responsibilities, Requirements, And Who We Are.

Role at a Glance

  • Mission: Own frontend features end-to-end—from scoping and architecture to shipping and iterating—ensuring a high-performance experience for complex crypto tax data.
  • Location: Remote. Must have significant overlap with Europe timezones.
  • Employment: B2B Contract.
  • Compensation: USD $80k – $100k/y.
  • Perks: 32 days PTO (incl. public holidays).
  • Experience: 8+ years with a focus on complex, data-heavy web applications.

Responsibilities

  • Own frontend features end-to-end: From scoping and architecture to shipping and iterating—without waiting to be told what to do next.
  • Write clean, well-structured TypeScript: Produce code that your teammates are proud to review and that follows best practices.
  • Make pragmatic technical decisions quickly: Know when to go deep into a problem and when to move fast to hit a deadline.
  • Proactive maintenance: Identify and fix pain points in the codebase. If you spot something broken or brittle, you fix it.
  • Product collaboration: Work closely with product and design, but push back when something doesn’t make sense for the user or the implementation.
  • Set the bar for quality: Maintain sensible abstractions and avoid unnecessary complexity to ensure long-term maintainability.
  • Contribute to technical direction: Have a voice in architecture decisions, tooling choices, and code standards.

Requirements

  • 8+ years of frontend experience: You have a proven track record of shipping complex SaaS products.
  • Expert-level TypeScript: You reach for strong typing instinctively, not as an afterthought.
  • Deep React experience: Expert knowledge of React and modern frontend tooling (Vite, ESLint, testing frameworks, etc.).
  • Self-starter mindset: You are comfortable with ambiguity, can define your own next steps, and don’t need a detailed spec to get started.
  • High standards: You care deeply about readability, correctness, and long-term maintainability.
  • Shipping velocity: Proven ability to ship fast without accumulating crippling technical debt.
  • Product instincts: You think about the user experience, not just the code implementation.
  • Remote-first: Experience working effectively in a remote, async-first team.

✔️ Don’t tick all of the boxes? Neither do we …

Posted: April 4th, 2026