Senior Full Stack Engineer – Ruby on Rails, ReactJS

ItsaCheckmate

Senior Full Stack Engineer developing innovative web-based restaurant-tech solutions at Checkmate. Collaborating with Product and Engineering teams in a remote-first environment.

Posted 5/6/2026full-timeRemote • 🇺🇸 United StatesSenior💰 $180,000 - $190,000 per yearWebsite

Tech Stack

Tools & technologies

AWSDockerGraphQLJavaScriptMySQLPostgresReactRubyRuby on RailsSQL

About the role

Key responsibilities & impact

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

Requirements

What you’ll need

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

Comp & perks

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

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Ruby on RailsReact.jsRESTful APIsGraphQL APIsSQLPostgreSQLMySQLAWSDockerAI coding agents

Soft Skills

collaborationmentorshipaccountabilityownershipcommunicationproblem-solvingtechnical specification writingroot-cause analysisteamworkadaptability

Certifications

Bachelor’s degree in Computer ScienceBachelor’s degree in Engineering