Staff Software Engineer, Frontend Platform

Costa Mesa · Costa Mesa, CA (OC-00) · USD 220,000-292,000 · Posted Sep 24, 2026

At a glance

The Staff Software Engineer, Frontend Platform will join the ArsenalOS team to build software powering Anduril’s manufacturing, supply chain, and production operations.
This role involves defining frontend architectures, building reusable platform capabilities, and establishing patterns for web, mobile, and progressive web experiences.
The position requires a balance of hands-on product development and technical leadership to create leverage across the organization.

Define frontend architectures and scalable patterns across large applications or multiple product teams.
Build reusable frontend infrastructure, shared libraries, component systems, or application frameworks.
Identify common problems across teams and turn them into reusable platform capabilities and paved paths.
Drive architecture and adoption across organizational boundaries.
Lead technically ambiguous initiatives from architecture through implementation and adoption.
Influence technical direction across teams while remaining hands-on in production code.

Deep experience building and architecting modern web applications using TypeScript, JavaScript, React, and related technologies.
Experience defining frontend architecture and scalable patterns across large applications or multiple product teams.
Experience building reusable frontend infrastructure, shared libraries, component systems, or application frameworks.
Strong understanding of browser fundamentals, application performance, testing, observability, and reliability.
Strong software engineering fundamentals including APIs, authentication and authorization, data modeling, and distributed systems concepts.
Experience leading technically ambiguous initiatives from architecture through implementation and adoption.
Ability to identify common problems across teams and turn them into reusable platform capabilities and paved paths.
Ability to influence technical direction across teams while remaining hands-on in production code.
US Citizen is required as this position needs to access export controlled data.

Experience building frontend platforms, design systems, application frameworks, or shared developer infrastructure.
Experience with progressive web applications, mobile applications, or React Native.
Experience with offline first, resilient, kiosk, industrial, or other operationally critical user experiences.
Experience with monorepos, shared libraries, package management, and large TypeScript codebases.
Experience with enterprise or manufacturing software such as MES, WMS, PLM, or ERP.
Eligibility to obtain and maintain a US Secret/TS clearance is preferred.