[Remote] Senior Full Stack Engineer - Ruby on Rails & ReactJS

Note: The job is a remote job and is open to candidates in USA. Checkmate is a restaurant technology solution provider that has continually evolved over time. They are seeking a Senior Full Stack Engineer to design, build, and maintain scalable web applications while leveraging AI technologies to drive innovative features and improvements in their product platform.

Responsibilities

• Collaborate with Product, Design, and Engineering teams to design, build, test, deploy, and maintain scalable web applications
• Leverage AI coding agents to accelerate product development and defect resolution
• Develop and maintain RESTful and/or GraphQL APIs
• Develop asynchronous application processing using tools like Sidekiq
• Build and maintain responsive, high-performance React.js interfaces and reusable components
• Write and optimize SQL queries across PostgreSQL/MySQL databases
• Improve application reliability, scalability, and long-term maintainability of large enterprise systems
• Create, and collaborate with other engineers on, technical specifications aligned against short term and long term Product roadmaps and enterprise architectural goals
• Use APM and observability tools to detect, diagnose, and fix performance bottlenecks
• Identify technical debt and drive practical solutions to pay down debt
• Own features and complex issues from product design through development, deployment, and monitoring
• Participate in all parts of the Product, Design, and Engineering processes building new features together in a collaborative pod-based environment
• Interact with our internal customers using your contributions to our software platform in support of our external customers
• Work with team members to identify, prioritize, and reduce technical debt and improve scalability and performance across the codebase
• Participate in architecture and technical design discussions across Product and Engineering
• Contribute to peer code reviews, automated testing, CI/CD pipelines, and deployment workflows
• Investigate and resolve outages with root-cause analysis and clear follow-up improvements
• Mentor junior engineers and promote engineering best practices using AI-led practices

Skills

• Bachelor's degree in Computer Science, Engineering, or equivalent practical experience
• 6+ years of experience building enterprise level applications using Ruby on Rails
• 3+ years working with React.js or a related modern javascript frameworks
• 3+ years working within a 30+ team member sized engineering team
• 3+ years working 100% remote and a desire to continue working remotely
• 3+ years developing and operating applications on AWS
• 2+ years developing using AI coding agents including Claude Code or Codex
• Experience working using Docker locally
• Experience running enterprise level production workload apps on AWS
• Experience integrating with RESTful and GraphQL APIs
• Experience write raw SQL queries in a relational database
• Experience building asynchronous background job process across multiple tools/frameworks
• Experience with observability tools like Datadog, Sentry, or New Relic
• Experience writing automated unit tests having > 60% code coverage
• CI/CD development experience creating Github Actions
• Experience modernizing legacy Ruby on Rails applications
• Experience working in product led engineering organization
• Experience working in a multi-team / pod-based engineering team
• Works with an accountability and ownership mindset and calls out gaps where they exist
• Experience working in high-volume transactional production environments
• Exceptional at translating product requirement documents into detailed technical specifications
• Work US Eastern Timezone hours between 9am - 5pm ET

Benefits

• Health Care Plan (Medical, Dental & Vision)
• Retirement Plan (401k)
• Life Insurance (Basic, Voluntary & AD&D)
• Flexible Paid Time Off
• Family Leave (Maternity, Paternity)
• Short Term & Long Term Disability
• Training & Development
• Work From Home

Company Overview