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 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. • Preferred Experience • 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.

BENEFITS

Constellis offers a comprehensive, total rewards package that includes competitive compensation and a flexible benefits package that reflect its commitment to creating a diverse and supportive workplace.