#435 senior full-stack engineer (ruby & next.js) (us)

We are looking for a Senior Full-Stack Engineer with deep expertise in Ruby (Ruby on Rails) and Next.js / React to join our team. In this role, you will lead the architecture and implementation of scalable, high-performance web applications, bridging modern backend architecture with fast, responsive frontend experiences. This is a primarily remote role across the US, but because we host periodic in-person team building sessions and collaborative offsites, proximity to our hubs in New York City (NYC) or Los Angeles (LA) is highly preferred.

Key Responsibilities

• Full-Stack Architecture: Design, build, and maintain scalable web applications using Ruby on Rails for robust API/backend systems and Next.js for modern, high-performance user interfaces.
• Frontend Excellence: Leverage modern Next.js features (App Router, Server-Side Rendering, Server Actions) and React patterns to deliver intuitive, high-speed UX.
• Backend & Database Management: Write clean, modular, and well-tested Ruby code. Optimize database queries (PostgreSQL / Redis) and handle asynchronous background processes.
• System Performance: Ensure high availability, microservices/API integration, and low-latency response times across the stack.
• Technical Leadership: Conduct code reviews, mentor team members, and partner with product managers and designers to drive architectural decisions.

Required Qualifications (Must-Haves)

• Experience: 5+ years of professional software engineering experience, with at least 3+ years in a Senior Full-Stack capacity.
• Core Stack Proficiency: Backend: Strong, hands-on expertise in Ruby on Rails (REST/GraphQL APIs, Active Record, Sidekiq). Frontend: Advanced mastery of Next.js and React (TypeScript experience is a strong plus).
• Database & Cloud: Strong knowledge of relational databases (PostgreSQL) and cloud infrastructure/deployments (AWS, GCP, Heroku, or Vercel).
• Architectural Acumen: Proven track record of designing scalable full-stack applications, handling data modeling, and optimizing web performance.
• Location & Availability: Based in the United States, ideally within commuting distance of NYC or LA for occasional in-person offsites and team gatherings.

Preferred Qualifications (Nice-to-Haves)

• Proficiency with TypeScript in Next.js applications.
• Experience with caching layers, message queues, and background processing (Redis, RabbitMQ).
• Familiarity with CI/CD pipelines, containerization (Docker), and automated testing frameworks (RSpec, Jest, Cypress).
• Prior experience working in fast-paced startup or scale-up environments.