Senior Systems Integration Engineer

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Job Description:

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.

What you will do

• 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

Required qualifications

• 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/OpenSearch, 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

Preferred qualifications

• Experience with HashiCorp 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

Why join Parsons in this role

• Work on technically demanding integration challenges with real operational impact
• Modernize a global platform from legacy interfaces to resilient microservices
• Deliver software, edge systems, cloud, networking, and observability solutions

Join a team where senior engineers have m