Senior/Staff Full Stack Engineer

About the Company

Ethos is on a mission to bridge the human readiness gap by transforming how training is developed, consumed, and aligned with strategic business outcomes. As a well-funded Series A startup, we are a trusted partner to 150+ enterprise customers across the U.S. military, life sciences, manufacturing, supply chain, and professional sports.

Responsibilities

• Build end-to-end features spanning Go services and React/TypeScript UI
• Use AI coding tools (Claude Code, Cursor, Copilot, etc.) as daily workflow tools
• Build and improve agentic workflows and AI-powered product features
• Improve system performance, latency, and reliability through caching and resilient patterns
• Raise the bar on testing, code quality, and observability
• Lead design reviews and mentor teammates (Staff level)

Requirements

• 5+ years of building enterprise-scale software systems
• Active, fluent use of AI development tools in daily workflow
• Strong Go skills or deep experience with another typed backend language
• Proficiency with React/TypeScript or equivalent modern frontend frameworks
• Strong API design skills (REST/gRPC)
• Demonstrated excellence in system design, testing strategy, and CI/CD
• Authorization to work in the U.S.

Preferred Qualifications

• Experience with agentic workflows, AI-powered features, or LLM integrations (RAG, agents)
• Experience deploying Go services with Docker and Kubernetes
• Strong observability experience with OpenTelemetry, Prometheus, or Datadog

Benefits

• Competitive base salary with significant equity upside
• Subsidized health insurance, 401(k), and life insurance
• Cell phone stipend
• Remote-first culture