✦ Luna Orbit — Software Engineering

Senior Full-Stack Software Engineer, Applied AI

at Circle.so

📍 Remote, US Remote 💰 $130K – $140K USD / year Posted March 25, 2026
Salary $130K – $140K USD / year
Type Not Specified
Experience mid
Exp. Years Not specified
Education Not specified
Category Software Engineering

This role involves developing full-stack AI solutions using Ruby on Rails and React, focusing on AI features, infrastructure, and experimentation. The engineer will work on innovative projects involving large language models and scalable AI applications.

  • Ship full-stack AI projects
  • Design and run experiments
  • Build AI infrastructure
  • Optimize performance
  • Iterate on AI features

The position requires expertise in web frameworks (Ruby on Rails, React), AI development, and infrastructure for LLM inference. The environment emphasizes rapid experimentation, testing, and deploying AI features in production.

The ideal candidate is a mid-level full-stack software engineer with hands-on experience in Ruby on Rails and React, and a strong interest in AI and large language models. They should be curious, experimental, and capable of building scalable AI features in production.

Ruby on RailsReactfull-stack developmentAI experience
AI researchinfrastructure for LLM inferenceA/B testing
Ruby on RailsReactAI frameworksA/B testing tools
ruby on railsreactfull-stack developmentAIlarge language modelsLLMsAI featuresA/B testinginfrastructureperformance optimization
Ruby on RailsReactfull-stack developmentAIlarge language modelsLLMsAI featuresA/B testinginfrastructureperformance optimizationsoftware developmentweb frameworks
curiosityexperimentationcollaborationproblem-solvingadaptabilitycommunication
Industry Technology / SaaS
Job Function Full-stack AI engineer
Role Subtype Software Engineering
Tech Domains Ruby on Rails, React, AI, Large Language Models, Web Frameworks
full-stack engineerruby on railsreactAIlarge language modelsLLMsAI featuresA/B testinginfrastructureperformance optimizationsoftware developmentweb frameworksremotefull-stack developmentAI researchinfrastructure for LLM inference

Lack of experience with Ruby on Rails or React, No experience with AI or LLMs, Unwillingness to work remotely, Lack of hands-on development experience

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