Senior Associate Frontend Developer Jobs in Webster, MA

About Re:Build
At Re:Build, our mission is to ensure the next generation of important products are made, at scale, in America. We are laying the foundation for a better future for our customers, employees, and communities by revitalizing America's manufacturing base and creating meaningful jobs across the country, including in historically deindustrialized regions.
We operate 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 critical verticals including aerospace and defense, electrification, medical, energy and environment, and robotics and automation.
The way we operate is as important as the work we do. It's guided by The Re:Build Way, 16 principles that shape how we collaborate with each other, partner with our customers and vendors, and contribute to the communities where we operate. (link to The Re:Build Way principles)
The Opportunity
If 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 visibility 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 TypeScript
• Developing and maintaining a shared component library
• Building rich interfaces for structured engineering data: requirements with traceability, phase/gate tracking, dependency graphs, task boards with discipline tags, and version-controlled project plans
• Building 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 risk
• Writing well-tested code with unit and end-to-end tests
• Collaborating with backend engineers on API integration and client SDK usage
• Contributing 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:

• Have worked 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: The opportunity to build purpose-built tooling for an entire 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
Location: Remote-first, with preference for candidates in Boston, Seattle, Los Angeles, or other cities with Re:Build offices
Compensation: The base salary range for this position is $165,000 - $200,000 per year. This range represents the Company's good faith estimate of the base compensation for this role at the time of posting. Actual compensation will be determined based on several factors, including but not limited to 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. The Company offers a comprehensive benefits package including medical, dental, vision, retirement, paid time off, and other benefits. Potential equity stake under independent spinout scenario.
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.
The BIG payoff
We are a company who is going to make a difference in the industries and the communities in which we choose to operate. Every employee of Re:Build will share ownership in the company and will share in the financial rewards of the success we achieve together, at all levels of the company!
We want to work with people that reflect the communities in which we operate
Re: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.