Backend Integration Engineer

Constellis•Washington, DC

About The Position

The Backend Integration Engineer will design and implement backend services that integrate diverse third-party systems into LEXSO’s microservice architecture, including: Ground-based sensors (LiDAR, radar, seismic) Video surveillance platforms Counter-UAS detection and tracking systems Access control systems (badge readers, gate systems, identity platforms) Drone/UAS response systems OSINT and weather systems where applicable This is a hands-on engineering role focused on API integration, real-time event processing, and deterministic device control within distributed systems.

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.