Senior Systems Integration Engineer

Gc2it; Reston (VA); On-site; USD 130,000 - 190,000; Full time

Job summary

GC2IT is seeking a Senior Systems Integration Engineer to design, modernize, and sustain integrations for a mission-critical identity and mobility platform. You will work across Java microservices, event-driven architectures, edge environments, and AWS cloud deployments to ensure secure, reliable system-to-system integrations.

This hands-on role requires strong hands-on experience with API integration, messaging systems like Kafka or RabbitMQ, and HA environments, with responsibility for

Qualifications

• Eight or more years of software engineering or systems integration.
• Strong hands-on experience with Java-based distributed services.
• Production experience with API integration and event-driven messaging.
• Experience with Kafka, RabbitMQ, JMS, AMQP, MongoDB, Elasticsearch/OpenSearch, or AWS deployments.
• Experience in high-availability, mission-critical, or regulated environments.
• Understanding of authentication, certificate security, schema evolution, and observability.
• Experience modernizing legacy integrations to microservices.
• Ability to collaborate across multiple engineering teams.

Responsibilities

• Design, build, and maintain secure integrations between the platform and third-party systems.
• Modernize legacy integrations into Java-based microservices.
• Build integrations across edge, data center, and AWS deployments.
• Ensure resilience, observability, and low-latency in integration networks.
• Define contracts, schemas, versioning, and testing approaches.
• Troubleshoot issues across application, data, messaging, and network layers.
• Collaborate with software, cloud, network, QA, and security teams.
• Support integrations with identity and verification services and peripherals.

Skills

Java distributed services

API integration

Event-driven messaging

HA / high availability

Security & auth

Service-oriented architecture

Tools

Consul

Nomad

Vault

AWS

Elasticsearch/OpenSearch

Job description

Location: Reston, Virginia

Position Summary

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.

Key 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.

Required Qualifications

• 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.

Preferred Qualifications

• 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.

Security Clearance Requirement

Active Top Secret/SCI security clearance required.

PHYSICAL DEMANDS

The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

While performing the duties of this job the employee is regularly required to climb, bend, stretch, walk, sit use hands to handle or feel; frequently use fingers to type; talk and hear; occasionally stand, kneel, stoop, crouch, bend, twist or reach out; may require lifting or moving 10 lbs; frequently required to reach with hands and arms. Vision requirements for this position include close vision, distance vision, color vision, peripheral vision, depth perception and ability to adjust focus.

WORK ENVIRONMENT

Work environment will have moderate noise when working in an office environment.

ADDITIONAL INFORMATION

Equal Opportunity Employer -

The Company does not discriminate based upon race, religion, color, national origin, sex, sexual orientation, gender, gender identity, gender expression, transgender status, sexual stereotypes, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics.

All applicants must be able to perform the essential functions of the position, including corresponding core job requirements, with or without reasonable accommodation. Reasonable accommodations may be made to enable individuals with disabilities (and others in accordance with applicable law) to perform the essential functions of the job, consistent with applicable laws and Company policy.

Job Type: Full-time