Backend Integration Engineer

Constellis•Virtual, VA

About The Position

LEXSO (Layered Extended Security Operations) is Constellis’ advanced, sensor-agnostic integration platform designed to respond at the speed of sensing. LEXSO is sensor agnostic but as an example, it fuses LiDAR, radar, camera, seismic, Counter-UAS systems, access control systems, and other detection technologies into a unified operational platform that enables real-time detection, automated workflows, and mission-focused decision support. We are seeking a Backend Integration Engineer to expand and support LEXSO’s device ingestion, control, and API integration services across multi-domain security environments.

Requirements

5–7 years of professional experience designing and implementing APIs.
5–7 years building backend systems in distributed or service-based architectures.
Bachelor’s degree in Computer Science, Engineering, or related technical discipline required
Experience integrating third-party systems via REST APIs.
Experience working with production systems requiring high availability.
Experience troubleshooting complex integration challenges.
Experience working in an Agile Development Environment.
Strong proficiency in one backend language such as Python (FastAPI) and Node.js
Experience working in microservice architectures.
Strong understanding of: REST API design best practices, JSON and streaming data formats, Event-driven architectures
Experience with: CI/CD pipelines, Docker or containerized deployments, Cloud environments (AWS, Azure, or hybrid)
Familiarity with authentication and role-based access control models.

Nice To Haves

Experience integrating Counter-UAS systems.
Experience integrating physical access control systems.
Experience working with sensor-based or IoT systems.
Familiarity with message brokers (Kafka).
Experience in defense, federal, or regulated environments.
Familiarity with geospatial data and spatial indexing.

Responsibilities

Develop backend services that ingest and normalize data from LiDAR systems, Radar platforms, Counter-UAS detection systems, PTZ camera systems, Seismic/Acoustic sensors and Access control systems
Build connectors and adapters for vendor-specific APIs and SDKs.
Translate heterogeneous data formats into standardized, spatially aware event models.
Integrate Counter-UAS detection systems that provide UAS identification, pilot localization, tracking telemetry and alert generation
Normalize UAS detection events into actionable backend workflows.
Support integration of drone response systems into automated workflows.
Ensure secure handling of airspace event data and real-time alerting
Integrate physical access control systems (ACS) into LEXSO
Correlate access control events with sensor detections and spatial context.
Support rule-based workflows linking perimeter detection to access control triggers.
Design and maintain RESTful APIs and service interfaces.
Implement secure authentication and authorization (OAuth2, JWT, RBAC).
Maintain API versioning and documentation standards.
Support service-to-service communication across microservices.
Ensure encryption and secure transport between systems.
Build ingestion pipelines capable of processing streaming sensor and system data.
Normalize incoming data into structured event models answering key
Support event prioritization, deduplication, and queue management.
Implement command routing services for supported devices and systems.
Support automated workflows triggered by real-time events.
Implement structured logging, monitoring, and system health reporting.
Participate in deployment validation and operational testing.
Business work hours are Monday-Friday from 8:00 am to 5:00 pm, however some extended or weekend hours may be required.