Senior Full Stack Engineer

Job Title:
Senior Full Stack Engineer – RangeGPT Platform

Location:
Remote (Boulder/Denver, CO preferred)

Department:
Engineering

Reports to:
Chief Engineer

Compensation:
$150,000–$180,000, commensurate with experience

Benefits:
Comprehensive benefits including medical, dental, and vision insurance, 401(k) with company match, HSA/FSA options, life and disability insurance, unlimited PTO, and paid holidays.

Job Summary

Circadence is hiring a Senior Full Stack Engineer to join the team behind RangeGPT—an intelligent cyber range design and analysis platform that combines a WYSIWYG interface with AI-powered automation.

RangeGPT enables cybersecurity professionals to visually design and deploy realistic training environments, while leveraging LLM-based agents for network topology/infrastructure generation, scenario guidance, and range analysis. As a full stack engineer, you'll contribute across backend services, API design, and a React-based frontend—helping build a 0-1 new product leveraging the latest technologies.

You’ll thrive in this role if you enjoy designing clean interfaces, building robust backend services, and integrating cutting-edge capabilities like tool-calling agents and real-time infrastructure orchestration.

Key Responsibilities

• Develop and maintain full stack features using Python (Django/FastAPI) and React + TypeScript
• Design scalable APIs and orchestration logic that integrate LLM agents, retrieval systems (RAG), and infrastructure generation pipelines
• Collaborate closely with AI and platform engineers to expose agentic capabilities via intuitive UI/UX patterns
• Build backend systems to support scenario authoring, misconfiguration detection, and real-time validation workflows
• Contribute to the canvas-based WYSIWYG editor, helping users bridge natural language input with visual infrastructure diagrams and deployment artifacts
• Participate in architecture and system design discussions, with an eye toward performance, maintainability, and extensibility
• Support DevOps and local development setups (Docker, Kubernetes, Azure DevOps), CI/CD pipelines, and observability instrumentation
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Required Qualifications

• 7+ years of experience in full stack or backend-heavy roles
• Strong proficiency in Python with production use of Django and/or FastAPI
• Professional experience with React + TypeScript, including component design and frontend state management
• Deep familiarity with REST API design and service-oriented architecture
• Experience working in containerized environments (Docker, Kubernetes) and implementing modern CI/CD workflows
• Solid knowledge of relational data modeling and PostgreSQL database management.
• Exposure to LLM integration, including function/tool calling, context injection, or orchestration systems
• Strong debugging, testing, and system design skills in production-grade environments

Preferred Qualifications

• Experience building canvas-based editors, graph tools, or low-code platforms
• Familiarity with LangGraph, semantic retrieval frameworks (e.g., Weaviate, PGVector), and RAG pipelines
• Background in cybersecurity, simulation tooling, or infrastructure-as-code
• Knowledge of MCP (Model Context Protocol) or other cyber range orchestration frameworks
• Experience with XYFlow/ReactFlow or similar graph visualization libraries