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Senior Full Stack Engineer / Ruby on Rails / Union Square, NYC
New York, NY, US
Ruby on Rails
Direct Hire, Direct Hire
$160000 - $200000
On-site
Other/Non Classified
New York, NY, US
$160000 - $200000
Direct Hire, Direct Hire
Other/Non Classified
On-site
Ruby on Rails
Job details
Senior Full-Stack Engineer (Senior–Principal Level)
A mission-driven startup operating at the intersection of climate and fintech is seeking a Senior Full-Stack Engineer to help build products that make sustainable building upgrades—such as heat pumps, batteries, and EV chargers—more accessible through innovative financing. This is a hybrid role based in New York City, with flexibility on level from Senior to Principal.
What You’ll Do
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Own end-to-end feature development, from ideation and architecture through deployment
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Write and review code across the full stack while balancing speed and quality
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Shape technical architecture, best practices, and decisions around technical debt and build-vs-buy
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Partner closely with founders and product stakeholders to influence roadmap and priorities
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Work cross-functionally and gain exposure to multiple areas of the business, including sales and customer discovery
What You’ll Bring
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5+ years of experience with Ruby on Rails or similar full-stack frameworks
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Strong understanding of modern web application development
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Deep experience with database design and management
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Excellent communication skills and comfort working across product and technical teams
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Ownership mindset and ability to thrive in ambiguity
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Experience building systems from 0?1 and scaling them
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Experience or strong interest in AI, ML, and LLMs
What’s Offered
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$160,000–$200,000 base salary (NYC) plus competitive equity
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Health, dental, and vision coverage
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Unlimited PTO
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Opportunity to join early and make a meaningful impact at a fast-growing, mission-oriented startup in climate and fintech
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