About the role

Role Overview

Join a distributed, async team to build and modernize frontend payment experiences used by millions of people. You’ll ship guest-facing checkout and payment flow features and help evolve a large, mature frontend codebase.

Responsibilities

Build and ship features across guest-facing checkout and payment flows
Modernize a large frontend codebase, migrating legacy state-management patterns to current standards
Deliver payment features end-to-end from design through launch on high-traffic consumer surfaces
Ensure accessibility compliance with WCAG 2.1 AA for all shipped UI
Trace features end-to-end by reading backend code to understand how UI maps to services behind it

Requirements

7–10 years building production web frontends with React and TypeScript
Deep Redux experience, including refactoring/migrating established Redux codebases
Strong CSS and layout fundamentals
Proven track record shipping accessible UI meeting WCAG 2.1 AA
Ability to ramp up quickly on large, unfamiliar codebases

Nice to Have

Demonstrated experience working across UI and services (reading backend code and tracing features)

What’s On Offer

High-impact, user-facing payment platform work
Opportunity to contribute to modernizing a significant frontend codebase
Distributed, async team environment

About Haystack

Haystack works with a company that builds the systems behind how guests pay for services, with a focus on checkout, payment methods, and user experiences. The team is focused on shaping and modernizing a payment platform used by high-traffic consumer surfaces.

Senior Software Engineer

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