Senior Software Engineer
Haystack
full-remoteseniorpermanentfrontendfullstack United States Today via LinkedIn
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ReactTypeScriptReduxFrontend ModernizationWCAG 2.1 AAAccessibilityCSSHigh-Traffic Consumer UIDistributed Async TeamPayment Systems
About the role
Role overview
Join a distributed, async team working on the payment platform that powers guest checkout and payment flows. You’ll build and ship features used by millions while modernizing a large, mature frontend codebase.
Responsibilities
- Build and ship features across guest-facing checkout and payment flows.
- Modernize an established frontend codebase by migrating legacy state-management patterns to current standards.
- Take payment features from design through launch on high-traffic consumer surfaces.
- Maintain high accessibility standards for all shipped products (WCAG 2.1 AA).
- Read backend code to trace UI features through the underlying services.
Requirements
- 7–10 years building production web frontends with React and TypeScript.
- Deep Redux experience, including refactoring and/or migrating large Redux codebases.
- Strong CSS and layout fundamentals; proven experience shipping WCAG 2.1 AA-compliant UI.
- Ability to ramp up quickly on large, unfamiliar codebases.
Nice-to-haves
- Not explicitly stated beyond the requirements listed above.
About Haystack
Haystack is recruiting for a company that builds the systems behind how guests pay for services. The focus is on checkout, payment methods, and guest-facing user experiences for high-traffic consumer products.
Scraped 7/25/2026