Senior Frontend Engineer - AI Product

Senior Frontend Engineer - AI Product Greater Boston, MA; Los Angeles, CA; Seattle, WAThe OpportunityIf you've worked alongside hardware teams, you know the damage that results from a missed change request or critical context that was never relayed to the right person. Reflow exists to close that gap. We're building the first AI-powered platform purpose-built for hardware product development, one that listens across the tools teams already use, maintains a structured picture of every program, and proactively coordinates across disciplines when things inevitably 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're seeking 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 that hardware teams have been stuck with for decades.This senior engineer 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 transparency into project health across disciplines. The role is hands-on - you will be coding daily while contributing to frontend architecture decisions and helping grow the design system as we scale.What You'll Do Your day-to-day responsibilities will include:Building production-grade React applications with TypeScriptDeveloping and maintaining a shared component libraryBuilding rich interfaces for structured engineering data: requirements with traceability, phase/gate tracking, dependency graphs, task boards with discipline tags, and version-controlled project plansBuilding interfaces for AI agent interactions including streaming chat, proactive coordination alerts, and AI-generated status summaries and deliverables (proposals, SOWs, reports)Implementing portfolio-level dashboards for engineering leaders and executives showing cross-project cost, schedule, and riskWriting well-tested code with unit and end-to-end testsCollaborating with backend engineers on API integration and client SDK usageContributing to frontend architecture decisions, code reviews, and engineering best practicesTechnical Requirements Must Have:5+ years building production web applications, with 3+ years focused on ReactDemonstrated proficiency using AI coding tools (Cursor, Copilot, Claude, etc.) to accelerate developmentExpert-level expertise with React, TypeScript, and modern JavaScriptStrong experience with component-driven development, design systems, and tools like StorybookProficiency with CSS frameworks (Tailwind CSS preferred) and responsive designExperience 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 codeHighly Valuable:Have worked in early-stage 0 to 1 startup environmentsFamiliarity with hardware development, engineering workflows, or project management processesExperience 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 applicationsUnderstanding 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 productsWhat We Offer Real Impact: The opportunity to build purpose-built tooling for an entire industry that has never had itCustomer Access: Direct exposure to hundreds of real hardware projects annually through Re:Build's engineering and manufacturing companiesTechnical Growth: Hands-on work with cutting-edge AI technologies solving novel technical challengesAutonomy: Backed by Re:Build while operating with startup independenceBenefits: Full health/dental/vision, bonus program, generous 401K, paid time off, annual learning stipendEquity & Growth: Participation in Re:Build's LTIP equity program and opportunity for founder equity in potential spin-outCompensation & Location Location: Remote-first, with preference for candidates in Boston, Seattle, Los Angeles, or other cities with Re:Build officesCompensation: Base salary range of $165,000 to $215,000 with performance bonus and long-term incentive plan offered. Potential equity stake under independent spinout scenario.Please note this role is restricted to US citizens or lawful permanent residents only due to exposure to export controlled informationAbout Re:Build Manufacturing Re:Build Manufacturing is a growing family of industrial and engineering businesses combining enabling technologies, operational superiority, and strategic M&A to build America's next generation industrial company. At Re:Build we deploy deep expertise in engineering, operations management, and technology to supercharge the performance of our member companies. We harness deep professional expertise and a candid, principled operating culture to drive differentiated outcomes. Ours is a fast-paced environment where individuals can stretch and be challenged to pursue their fullest potential.Re:Build was founded to pioneer a profitable model for the revitalization of US manufacturing. We've assembled a powerful set of complementary capabilities and lines of business that enable us to pursue a wide range of end markets. Our acquired businesses are grounded in build-to-print and by-the-hour engineering and design services, and we're using their combined expertise to migrate to increasingly sophisticated program development and production, as well as the generation of our own products. Our unique set of capabilities lend themselves to highly complex systems and products, and we offer customers a range of services including product and systems design, automation, fabrication, assembly, and large volume contract manufacturing. Our customers span a wide array of industries including aerospace, defense, mobility, healthcare, pharma, biotech, clean tech, chemicals, energy, lifestyle, food production, and industrial equipment.We want to work with people that reflect the communities in which we operateRe:Build Manufacturing is proud to be an Equal Employment Opportunity and Affirmative Action employer. We do not discriminate based upon race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, veteran status, marital status, parental status, cultural background, organizational level, work styles, tenure and life experiences. Or for any other reason.Re:Build is committed to providing reasonable accommodations for qualified individuals with disabilities in our job application procedures. If you need assistance or an accommodation due to a disability, you may contact us at accommodations.ta@ReBuildmanufacturing.com or you may call us at 617.909.6275.