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Full Stack Ruby on Rails Software Engineer

icortica
Full-time
On-site
Waltham, Massachusetts, United States

Description

We are seeking a Full Stack Ruby on Rails Engineer who is skilled at building scalable applications and comfortable leveraging AI in both development workflows and product features. This will be icorticaโ€™s second full time engineer in our very small startup with big plans.  You will work across the stack, from backend services and APIs to front-end interfaces, helping us deliver data-driven insights and workflow automation.

Responsibilities

  • Primary focus on developing integrations with third-party systems and our own API
  • Build and maintain full stack web applications with Ruby on Rails, PostgreSQL, and modern front-end frameworks
  • Write high-quality, well-tested code
  • Optimize application performance, scalability, and security
  • Collaborate with product and design teams to deliver features end-to-end
  • Contribute to code reviews, architecture discussions, and engineering best practices

Requirements

  • 1-2+ years in a startup environment
  • Strong proficiency with Ruby on Rails (5+ years professional experience preferred)
  • Solid understanding of PostgreSQL and relational database design
  • Knowledge of multi-tenant architectures and data privacy/security best practices
  • Experience with background job processing and automated testing
  • Front-end experience with HTML, CSS (Tailwind), JavaScript, and Hotwire (Stimulus and Turbo).
  • Demonstrated experience using AI tools (Cursor, Codex, Claude Code) in the development process
  • Experience with crafting fault tolerant, resilient, and observable integrations with 3rd party APIโ€™s

Benefits

  • Health Care Plan (Medical & Dental)
  • Paid Time Off (Vacation, Sick & Public Holidays)