Senior Software Engineer, Full-Stack (Web Core)

Greenlight is looking for a Senior Software Engineer, Full-Stack for our Web Core team. This is an exceptional, high-impact opportunity to help bring Greenlight's core product functionality to the web. As part of a horizontal platform team, you'll build and evolve the foundational systems that power web experiences across the organization, partnering with product and engineering teams to enable scalable, high-quality development. In addition to contributing across our frontend and backend services, you'll provide technical leadership, mentor engineers, and help drive engineering excellence across the platform.

This role reports to a Director, Engineering.

Work perks at Greenlight:

• Medical, dental, vision, and HSA match
• Paid life insurance, AD&D, and disability benefits
• Traditional 401k with company match and Roth IRA
• Unlimited PTO
• Paid company holidays and pop-up bonus holidays
• Professional development stipend
• Mental health resources
• 1:1 financial planners
• Fertility healthcare
• 100% paid parental and caregiving leave, plus cleaning service and meals during your leave
• Flexible WFH, both remote and in-office opportunities
• Fully stocked kitchen, catered lunches, and occasional in-office happy hours
• Employee resource groups

Technologies we use:

• Frontend: React, Next.js, TypeScript, Tailwind CSS, Modern build tools (Turborepo, etc.), Testing (Cypress, React Testing Library, Jest).
• Backend & Infrastructure: Node.js, Express, TypeScript, REST APIs, Kubernetes (EKS).

Your day-to-day:

• Lead the design and implementation of groundbreaking web experiences, translating mobile features to the web with world-class UX.
• Drive technical strategy, define engineering standards/best practices, mentor engineers, and establish the technical vision for the web platform.
• Manage technical debt, champion code quality, and lead architectural evolution.
• Design, modify, and develop backend services that power web products, ensuring systems scale and championing system reliability, performance, and observability.

What you’ll bring to the team:

• BS in Computer Science or equivalent
• 7+ years of software development experience with a track record of technical leadership
• Deep expertise in React/Next.js/Remix
• Strong experience building REST APIs and backend services with Node.js/TypeScript
• Experience with modern build tools, testing, and CI/CD.

Preferred experience:

• Experience with A/B testing/experimentation and modern MarTech tools (Segment, Optimizely, Mixpanel, Amplitude).