Senior Software Engineer
Haystack
seniorfrontend United States Yesterday via LinkedIn
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ReactTypeScriptReduxCSSAccessibilityWCAG 2.1 AACheckoutPayment SystemsFrontend ModernizationHigh-Traffic Web Applications
About the role
Role Overview
Senior Software Engineer to build and modernize the systems behind guest checkout and payment experiences for consumer services used by millions.
Responsibilities
- Build and ship features across guest-facing checkout and payment flows.
- Modernize a large, mature frontend codebase, including migrating legacy state-management to current standards.
- Deliver payment features end-to-end from design through launch on high-traffic consumer surfaces.
- Ensure accessibility for all shipped products, meeting WCAG 2.1 AA.
- Trace features from the UI through the backend services that power them.
Requirements
- 7–10 years building production web frontends with React and TypeScript.
- Deep Redux experience, including refactoring and migrating large, established Redux codebases.
- Strong CSS and layout fundamentals.
- Proven experience shipping accessible UI that meets WCAG 2.1 AA.
- Ability to read backend code and connect UI features to underlying services.
- Proven ability to ramp up quickly on large, unfamiliar codebases.
Nice to Have / Signals
- Experience working on user-facing, high-impact payment systems.
- Comfort working in a distributed, async team environment.
Scraped 7/26/2026