Senior Full-stack Engineer

Boston

**About Arbor** Arbor is building an intelligent electricity marketplace to power an abundant electric future. As AI data centers drive a surge in electricity demand, millions of homes and businesses remain trapped with 20th century monopoly interfaces, overpaying by billions while cheap renewable energy goes to waste. Our AI-powered platform aggregates users to unlock wholesale pricing, automatically switches between the best rates, and optimizes usage to align with prices in real-time---delivering the same market advantages that were previously exclusive to Fortune 500 companies. We've raised over $20 million from leading investors and have saved over $7.5 million for tens of thousands of homes and businesses. **The Opportunity** We're looking for a Senior front-end leaning fullstack engineer to own the user-facing experience of our energy marketplace---the interface where tens of thousands of customers see their savings, compare rates, and take action on their energy decisions. You'll be hands-on building products while also elevating the frontend craft across our engineering team. This is a player-coach role: you'll ship high-impact features, set technical direction for frontend architecture, and mentor engineers on a lean team where quality and velocity both matter. **What You'll Do** * Lead user-facing development for our marketplace platform, from real-time rate comparisons to customer dashboards and enrollment flows * Set technical direction for frontend architecture, tooling, and best practices across the team * Build polished, performant interfaces that make complex energy market data intuitive for consumers and businesses * Mentor and grow frontend engineers; conduct code reviews that raise the bar on quality and craft * Partner with product and design to translate user needs into delightful, high-converting experiences. Take product ownership on select features and projects when necessary. * Champion AI-augmented development workflows - we expect leads to model how AI tools can multiply team output * Balance hands-on contribution (expect 60-70% coding) with technical leadership and cross-functional collaboration **What You Bring** * 5+ years of full stack engineering experience, with at least 1-2 years in a tech lead or senior mentorship capacity * Expert-level React and Next.js skills; you've architected and scaled production applications, not just contributed to them * Familiarity with SQL (Postgres preferred), Node, API development patterns * Strong TypeScript proficiency and opinions on frontend patterns that actually work at scale * Clear communication skills; you can articulate technical tradeoffs to engineers and non-engineers alike * Eye for UI/UX quality; you care about the details that separate good products from great ones * Experience with modern frontend tooling, testing strategies, and performance optimization * AI fluency: you're already using AI coding tools daily and excited to help the team level up their AI-augmented workflows * Comfort with ambiguity and a bias toward shipping; you thrive when ownership is high and direction-setting is part of the job * Interest in energy, climate tech, or marketplace products is a strong plus **Compensation \& Work Setup** * Competitive salary + meaningful equity + benefits * Remote-friendly with occasional in-person collaboration as needed