Senior Backend Engineer

Senior Backend Engineer

We are hiring a Senior Backend Engineer with deep Django expertise to help drive the next generation of RangeGPT—an intelligent cyber range design and analysis platform that blends real‑time infrastructure automation, scalable backend services, and AI‑driven orchestration.

RangeGPT empowers cybersecurity teams to design and deploy realistic training environments using natural‑language interaction, semantic retrieval, and automated scenario generation. In this role, you’ll build and evolve the backend systems that make this possible—owning schema design, API development, service architecture, and integration with AI‑driven workflows.

• Design, implement, and maintain backend services using Python and Django, powering RangeGPT’s API, orchestration, and data layers.
• Lead PostgreSQL schema design and migrations, ensuring strong data modeling, performance, and long‑term evolution.
• Develop and enhance RESTful APIs consumed by a React‑based frontend and internal services.
• Create, manage, and manipulate complex JSON structures for API payloads, system configuration, and AI‑driven workflows.
• Build backend logic that drives cyber range creation, cloud resource provisioning, and infrastructure automation.
• Contribute to infrastructure‑as‑code workflows and backend automation pipelines supporting dynamic deployment.
• Implement backend components that account for networking, service interconnects, and environment‑aware logic.
• Collaborate closely with frontend engineers to ensure seamless integration between Django REST APIs and the React UI.
• Manage containerized development and runtime environments using Docker.
• Support CI/CD workflows, preferably using Azure Dev Ops.
• Participate in architecture discussions focused on scalability, modularity, reliability, and long‑term maintainability.

• 7+ years of backend or full‑stack engineering experience with a strong backend focus.
• Expert proficiency in Python, with proven production experience using Django (DRF, ORM, migrations, middleware).
• Strong knowledge of PostgreSQL schema design, indexing, migrations, and query optimization.
• Extensive experience building and optimizing REST APIs and backend service layers.
• Strong understanding of JSON serialization, API‑driven data modeling, and payload validation.
• Experience working with Docker and containerized development workflows.
• Familiarity with networking fundamentals including routing, service communication, and infrastructure components.
• Experience with infrastructure‑as‑code, CI/CD principles, and automated service provisioning.
• Solid software engineering fundamentals including testing, debugging, observability, and reliability engineering.

• Experience building or integrating LLM‑driven systems, agentic workflows, or retrieval‑augmented generation pipelines.
• Familiarity with orchestration frameworks such as Lang Graph or similar structured reasoning frameworks.
• Experience working with vector databases and semantic search systems.
• Background in cybersecurity, simulation tooling, or cloud automation platforms.
• Knowledge of FastAPI, Django Channels, or async Python programming.
• Experience with distributed systems, message brokers, or task queues such as Celery, Redis, or RabbitMQ.
• Familiarity with infrastructure orchestration tools such as Terraform or Ansible.
• Hands‑on experience with Azure Dev Ops pipelines and deployment workflows.

• Excellent verbal and written communication skills.
• Proactive problem‑solver with strong analytical thinking.
• Self‑motivated with the ability to work effectively in a remote environment.
• Collaborative mindset and team‑oriented approach.
• Adaptable to changing priorities and requirements.

Circadence Corporation is proud to be an equal‑opportunity employer.
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Benefits:
Medical insurance, Vision insurance, Dental insurance, 401(k), Paid maternity leave, Paid paternity leave, Disability insurance.

Circadence is a premier provider of cyber range solutions, boasting unparalleled proficiency in crafting,…