Frontend Staff Engineer - Koinly

Koinly is a successful product used by crypto investors around the world, helping them make sense of complex portfolios and tax obligations across chains, wallets, exchanges, and Defi protocols. 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.

We're looking for a Frontend Staff Engineer to take deep ownership of our data platform - the engine behind products at the intersection of crypto, finance, and tax. You'll work across a modern React web application and a high-performance distributed data-processing backend, with a new React Native mobile app joining your scope in the future.

This is a senior, hands-on role for someone who combines exceptional engineering craft with genuine product ownership. We expect you to lead by example: writing high-quality code, making sound architectural decisions, and raising the bar for the entire frontend team.

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 ensuring a high-performance experience for complex crypto tax data.

Location: Remote - Strictly Europe (EU / UK timezones)

Note, we won’t review job applications from outside Europe.

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.

Work within one of the most rapidly growing industries in the world

What we're looking for

We're looking for someone who thrives on complex, business-critical financial web applications - systems with real architectural depth and high stakes. You’ll focus on optimizing, refactoring, and elevating our existing codebase while steadily delivering critical new features for a high-performance interface that handles massive datasets and complex DeFi reconciliations.

Above all, we value a high sense of product ownership, exceptional code quality, autonomy, and openness: you take responsibility for outcomes, not just tasks, and you work independently while staying transparent and collaborative.

We also expect:

Deep understanding of modern, complex web application architecture and the design patterns that support it at scale.

Work closely with product and design , serving as the primary frontend partner for Product. You’ll evaluate ideas from a technical perspective, propose creative solutions, and take real ownership of our frontend strategy.