Senior Full-Stack Engineer (Ruby & Next.js) (US)

Description: We are looking for aSenior Full-Stack Engineerwith deep expertise inRuby (Ruby on Rails)and Next.js / Reactto 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 aprimarily remote roleacross the US, but because we host periodic in-person team building sessions and collaborative offsites, proximity to our hubs inNew York City (NYC)orLos 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 inRuby on Rails(REST/GraphQL APIs, Active Record, Sidekiq).Frontend: Advanced mastery ofNext.jsand 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 ofNYCorLAfor occasional in-person offsites and team gatherings.

Preferred Qualifications: (Nice-to-Haves) Proficiency with TypeScriptin 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. Cooperation termsB2B cooperation under a Consulting Agreement12 days of Paid Time Off per year5 days of Medical Time Off per year3 paid holidays per year Online Wellness & Psychologist Consultations Professional Development Budget - courses and conferences

About the Company: ScrumLaunch is an award winning US-based software development company. We work with both high growth startups and major corporations on building cutting edge software across many industries. Employment Type FULL TIME