Senior Full Stack Engineer / ClimateTech / React + Ruby on Rails / NYC or Remote Senior Full Stack Engineer / ClimateTech / React + Ruby on Rails / NYC or Remote New York, New York Open to Remote Direct Hire $140k - $180k Senior Full-Stack Engineer Join a mission-driven startup at the intersection of climate and fintech, dedicated to making sustainable building upgrades—like heat pumps, batteries, and EV chargers—more affordable and accessible. We are looking for a Senior Full-Stack Engineer to build products and features that empower contractor and manufacturer partners to accelerate the adoption of energy-efficient solutions. This role is ideal for engineers who thrive in fast-paced environments, enjoy working across the entire stack, and want to make a direct impact in a high-growth startup. This is a hybrid position based in NYC with flexibility on leveling from Senior to Principal Engineer. What You'll Do Own end-to-end feature development, from ideation and planning through execution and deployment Write and review code across the full stack while balancing quality and execution speed Make key architectural decisions, define best practices, and manage technical debt Work closely with the founding team to shape the product roadmap, understand customer pain points, and influence priorities Gain exposure to all aspects of a startup, including sales, customer discovery, and strategy Required Skills & Experience 5+ years of experience in full-stack development, preferably with Ruby on Rails or similar frameworks Strong understanding of modern web application development practices Expertise in database design and management Excellent communication skills and ability to work cross-functionally to balance product and technical requirements Ownership mindset with the ability to operate in an ambiguous, fast-moving environment Experience designing and scaling systems from 0 to 1 and beyond Interest or experience in AI, ML, and LLMs is a plus What You Will Be Doing Tech Breakdown 50% Back-end development (Ruby on Rails, database management) 50% Front-end development & full-stack architecture Daily Responsibilities 70% Hands-on development, coding, and reviewing 20% Collaborating with product, design, and business teams 10% Researching and implementing new technologies and best practices The Offer $140,000 - $180,000 salary (New York) + competitive equity package Health, dental, and vision insurance Unlimited PTO A unique opportunity to join a mission-driven, fast-growing startup at the ground level Posted by: Henry Mills

Specialization:

Javascript