Sr. Systems Integration Engineer

Global C2 Integration Technologies•Reston, VA

2d•$100 - $100•Onsite

About The Position

GC2IT is seeking a Senior Systems Integration Engineer to design, modernize, and sustain integrations for a mission-critical, globally deployed identity and mobility platform. This hands-on role focuses on complex system-to-system integrations across Java microservices, event-driven architectures, edge environments, and cloud platforms.

Requirements

Eight or more years of experience in software engineering or systems integration.
Strong hands-on experience building Java-based distributed services.
Proven production experience with API integration and event-driven messaging.
Experience with one or more of the following: RabbitMQ, Kafka, JMS, AMQP, MongoDB, Elasticsearch/OpenSearch, or AWS production deployment/operations.
Experience designing and supporting integrations in high-availability, mission-critical, or regulated environments.
Strong understanding of authentication/authorization, certificate-based security, schema evolution, error handling/retries, observability, and supportability.
Experience modernizing legacy or monolithic integrations into service-oriented or microservices-based architectures.
Ability to work effectively in a highly collaborative engineering environment with direct ownership of delivery outcomes.
TS/SCI Clearance Required

Nice To Haves

Experience with HashiCorp tooling, especially Consul, Nomad, and Vault, or adjacent platforms.
Experience with AWS-native services and infrastructure automation.
Familiarity with ELK, Grafana, Kibana, Logstash, or other observability stacks.
Experience integrating biometric devices, document readers, cameras, license plate readers, or other field peripherals.
Experience with degraded, disconnected, or low-bandwidth environments.

Responsibilities

Design, build, and maintain secure, reliable integrations between a distributed platform and third-party systems using REST APIs, asynchronous messaging, secure file/data exchange, and device/peripheral interfaces.
Modernize legacy integrations into Java-based microservices operating within a distributed platform architecture.
Build integrations across edge, data center, and AWS cloud deployment models.
Engineer integrations for resilience, observability, auditability, latency, and intermittent or low-bandwidth network conditions.
Integrate with government and commercial systems such as identity and verification services, traveler data platforms, biometric and document-capture peripherals, and access-control/gate systems.
Define interface contracts, schemas, versioning strategies, retry/idempotency behavior, and certification/test approaches.
Troubleshoot issues across application, data, messaging, and network layers.
Partner with software, cloud, network, QA, field engineering, analytics/observability, and security teams.