Senior Frontend Platform Engineer

Upstart

full-time

Posted on: 9/25/2025

Origin: • 🇺🇸 United States

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💰 $163,600 - $226,400 per year

Senior

ReactReact NativeTypeScriptWebpack

About the role

Design, build, and maintain the core frontend platform and tooling used across product engineering teams.
Lead efforts to improve build pipelines, CI/CD workflows, testing frameworks, and local dev environments.
Own and evolve core frontend platform, frameworks, and developer tooling that power web and mobile applications.
Guide adoption of technologies (e.g., React, TypeScript, React Native) and define architectural patterns that ensure scalability, reliability, and performance.
Collaborate closely with product engineers, infrastructure teams, and design systems partners to drive technical strategy and align frontend initiatives with company-wide engineering strategy.
Set standards and solve cross-cutting challenges at scale to empower product teams to deliver exceptional user experiences.
Champion frontend excellence and build tools and services used internally by engineering, design and product teams.

6-8 years of professional frontend engineering experience, with deep expertise in React and TypeScript; experience with mobile (React Native) is a plus.
Strong knowledge of web performance, testing strategies and modern frontend architectures.
Solid understanding of observability and monitoring for frontend systems (eg: Sentry, Datadog)
Hands-on experience with modern build systems (eg: Turbo, Webpack, Vite)
Skilled in CI/CD tooling (eg: GitHub Actions, CircleCI) and automation of release pipelines.
Experience building frameworks, libraries, or tooling that scaled across multiple teams or applications. (Preferred)
Ability to partner effectively with engineers, designers, and PMs; excellent communication skills. (Preferred)
Knowledge of microfrontend architecture and familiarity with different content rendering strategies. (Preferred)