Senior Frontend Engineer

About Re:Build

Re:Build’s mission is to ensure the next generation of important products are made, at scale, in America. We revitalize America’s manufacturing base and create meaningful jobs across the country, including in historically deindustrialized regions, by operating an advanced, end-to-end manufacturing platform that partners with industrial companies and innovators to take products from first concept to full-scale production in aerospace and defense, electrification, medical, energy and environment, and robotics and automation. Our operating principles—The Re:Build Way—guide how we collaborate internally, partner externally, and contribute to the communities where we operate.

The Opportunity

Reflow is building the first AI-powered platform purpose-built for hardware product development. We listen across the tools teams already use, maintain a structured picture of every program, and proactively coordinate across disciplines when things change. This is a ground-floor opportunity for a hands-on frontend engineer to shape the user experience of a high-potential product with the support of a parent company leading innovation in engineering and manufacturing.

Who We're Looking For

We seek a frontend engineer who cares deeply about building interfaces that are fast, intuitive, and delightful. The ideal candidate has shipped production React applications and has strong opinions on component architecture and design systems. You should already be using AI coding tools like Cursor, Copilot, or Claude to accelerate your work, with excitement about building the product that finally replaces the spreadsheets and status meetings hardware teams have relied on for decades.

In this senior role, you will work alongside our engineering team and head of product to build the interfaces through which users manage structured engineering artifacts (requirements, project plans, dependencies), interact with ambient AI agents, and get real-time visibility into project health across disciplines. The role is hands-on—you will code daily while contributing to frontend architecture decisions and helping grow the design system as we scale.

What You'll Do

• Build production-grade React applications with TypeScript
• Develop and maintain a shared component library
• Build rich interfaces for structured engineering data: requirements with traceability, phase/gate tracking, dependency graphs, task boards with discipline tags, and version-controlled project plans
• Build interfaces for AI agent interactions including streaming chat, proactive coordination alerts, and AI-generated status summaries and deliverables (proposals, SOWs, reports)
• Implement portfolio-level dashboards for engineering leaders and executives showing cross-project cost, schedule, and risk
• Write well-tested code with unit and end-to-end tests
• Collaborate with backend engineers on API integration and client SDK usage
• Contribute to frontend architecture decisions, code reviews, and engineering best practices

Technical Requirements

• Must Have:
• 5+ years building production web applications, with 3+ years focused on React
• Demonstrated proficiency using AI coding tools (Cursor, Copilot, Claude, etc.) to accelerate development
• Expert-level expertise with React, TypeScript, and modern JavaScript
• Strong experience with component-driven development, design systems, and tools like Storybook
• Proficiency with CSS frameworks (Tailwind CSS preferred) and responsive design
• Experience with modern build tools (Vite, esbuild, or similar)
• Understanding of API integration patterns (REST, OpenAPI, generated clients)
• Ability to balance rapid iteration with maintainable, well-tested code
• Highly Valuable:
• Experience in early-stage 0-to-1 startup environments
• Familiarity with hardware development, engineering workflows, or project management processes
• Experience building UIs for AI/LLM-powered features (streaming responses, chat interfaces, structured AI output)
• Familiarity with headless component libraries (Base UI, Radix, Headless UI)
• Background in data visualization or dashboard-heavy applications
• Understanding of authentication/authorization patterns (OIDC, JWT)
• Experience with end-to-end testing frameworks (Playwright, Cypress)
• Background in B2B SaaS platforms, project management tools, or technical collaboration products

What We Offer

• Real Impact: Build purpose-built tooling for an industry that has never had it
• Customer Access: Direct exposure to hundreds of real hardware projects annually through Re:Build’s engineering and manufacturing companies
• Technical Growth: Hands-on work with cutting-edge AI technologies solving novel technical challenges
• Autonomy: Backed by Re:Build while operating with startup independence
• Benefits: Full health/dental/vision, bonus program, generous 401K, paid time off, annual learning stipend
• Equity & Growth: Participation in Re:Build’s LTIP equity program and opportunity for founder equity in potential spin-out

Compensation & Location

Remote-first, with preference for candidates in Boston, Seattle, Los Angeles, or other cities with Re:Build offices. The base salary range for this position is $165,000 – $200,000 per year. Actual compensation will be determined based on relevant experience, skills, qualifications, internal equity, and geographic location. In addition to base salary, this role may be eligible for annual incentive compensation and/or long-term incentives, subject to Company plans.

Export Control Requirement: Due to applicable export control laws and regulations, candidates must be a U.S. citizen or national, U.S. permanent resident (i.e., current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum.