Senior Frontend Engineer

Trusted by more than 18,000 Shopify and Shopify Plus stores, Postscript gives ecommerce brands the tools they need to run a world-class SMS marketing program.

As Senior Frontend Engineer for the Messaging Channels team, you will build and ship user-facing experiences that power our multi-channel messaging platform, enabling top ecommerce brands to reach their customers across SMS, email, and emerging channels.

Primary Duties:
• Build and maintain frontend experiences using React and TypeScript.
• Collaborate with product managers, designers, and backend engineers to plan and execute work.
• Drive frontend architecture decisions and establish patterns that scale across the team.
• Write well-tested, accessible, and performant code.
• Mentor mid-level and junior engineers through code reviews and pairing.
• Contribute to frontend tooling, component libraries, and shared infrastructure.

Requirements:
• 4+ years of professional experience building web applications with React and TypeScript.
• Deep understanding of modern frontend patterns: state management, component architecture, hooks, rendering optimization.
• Experience building complex, interactive UIs — rich workflows, editors, or data-heavy dashboards.
• Experience with frontend testing strategies (unit, integration, e2e).
• Early-stage/high-growth SaaS experience preferred.
• Ecommerce or martech experience a plus.

Compensation: $172,000–$203,000 base + equity. Fully remote.