Full-Stack Software Engineer, Core Platform
Lumbra•Arlington, VA
•Onsite
About The Position
Nebula turns days of manual synthesis into minutes of analysis. We want a full-stack engineer to own features end to end across the Python backend and the React frontend, putting real AI tooling directly in analysts' hands.
Requirements
- Ships production Python (async, relational modeling, layered services) and production React and TypeScript
- Reasons comfortably about data flow through every layer, from schema to UI state
- Writes clean, well-tested code and works test-first
Nice To Haves
- Agentic AI systems: harness engineering, context engineering, or building on LLM APIs
- Distributed task orchestration systems
- Graph databases or vector search for knowledge representation and retrieval
- Model Context Protocol or similar tool-use frameworks
- Identity management (OAuth2/OIDC)
- Open-source developer-tooling contributions
- Intelligence analysis, OSINT, or analytical workflows that inform product intuition
- Cloud infrastructure (GCP or equivalent): managed Kubernetes, managed databases, secrets management
Responsibilities
- Design and build FastAPI endpoints backed by PostgreSQL and SQLAlchemy for agent configuration, workflow orchestration, and evaluation pipelines.
- Implement interactive React and TypeScript features: conversation interfaces, workflow visualization, and knowledge-graph exploration.
- Build durable workflow orchestration for long-running agent execution, including delegation, monitoring, and timeout propagation.
- Own features across the full stack, from database migration through API contract to UI state.
- Bring clean abstractions and well-defined interfaces to a fast-moving codebase, writing code that survives constant change and stays easy to understand, refactor, and extend.
- Write contract-driven tests across backend and frontend that cover the spec rather than the implementation, working test-first.
- Design testing for non-deterministic AI components: metamorphic testing, property-based testing, and regression suites that catch capability loss without overfitting to specific outputs.
- Contribute to the Python and TypeScript client SDKs so programmatic consumers get ergonomic, well-typed access.
- Own performance across the stack and profile before guessing: API latency, query efficiency, render performance, and end-to-end streaming latency.
- Treat slowness as a defect.
- Debug across service boundaries with local environments and distributed tracing.
Benefits
- Comprehensive medical, dental, and vision plans
- Premiums 100% covered by Lumbra for all employees
- Exceptionally low premiums for spouses and dependents
- Basic life insurance and disability 100% covered for all employees by Lumbra
- Option to purchase additional life insurance available
- Take the time off that you need, when you need it' paid time off, not accrual based
- Generous company holiday calendar including a holiday shutdown in December
- Supportive leave of absence program including time off for military service, medical events, and parental leave
- Full 401(k) retirement plan for all full-time eligible employees
- Company-funded commuter benefits
- Free access to on-site gym at office
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What This Job Offers
Job Type
Full-time
Career Level
Mid Level
Education Level
No Education Listed
