Backend Integration Engineer

About Constellis & LEXSO

Constellis delivers integrated risk management and security solutions that protect people, infrastructure, and operations worldwide.

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.

 

Position Overview

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.

 

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. 

 

Qualifications

• 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 underst