Senior Systems Integration Engineer

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Parsons is seeking a Senior Systems Integration Engineer to help design, modernize, and sustain integrations for a mission-critical, globally deployed identity and mobility platform
. This is a hands‑on engineering role for someone who has built and operated complex system-to-system integrations across Java microservices, event-driven architectures, edge environments, and cloud platforms
.

You will work on both standards-based and custom integrations spanning external data providers, identity and verification services, biometric and peripheral devices, access-control systems, and country- or customer-specific third-party platforms. The environment ranges from low-power edge clusters in austere locations to large, centralized deployments to cloud-forward AWS architectures
.

This role is ideal for an engineer who enjoys solving hard interoperability problems, modernizing legacy interfaces, and building resilient integrations that operate reliably under real-world network, performance, and operational constraints.

• 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 running in a distributed platform architecture.
• Build integrations across edge, data center, and AWS cloud deployment models.
• Engineer for resilience, observability, auditability, latency, and intermittent/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 and 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 closely with software, cloud, network, QA, field engineering, analytics/observability, and security teams.

• 8+ 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
  , or similar messaging platforms.
• MongoDB
  , Elasticsearch/Open Search
  , or comparable data platforms.
• AWS deployment and operations in production environments.
• Experience designing and supporting integrations in high-availability, mission-critical, or regulated environments
  .
• Strong understanding of integration concerns such as authentication/authorization, certificate-based security, schema evolution, error handling and 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.

• Experience with Hashi Corp tooling
  , especially Consul, Nomad, and Vault
  , or with adjacent platforms whose skills transfer quickly.
• 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
  .

• Work on technically demanding integration challenges with real operational impact.
• Modernize a global platform from legacy interfaces to resilient…