Sr Principal Engineer - Software

Responsibilities:

• Engineer enterprise solutions that align with best practices to support mission critical objectives.

• Work on 1-3 mid- to large-scale projects concurrently, assigned from program and internal leadership.

• Participate in regular project design and incremental status meetings.

• Collaborate with different teams across the program to discuss, analyze or resolve usability issues and work on projects.

• Provide effective communication across multi-functional teams, stakeholders and end-users.

Basic Qualifications:

• Senior Principal level: Bachelor’s Degree in a STEM (Science, Technology, Engineering or Mathematics) discipline and 8 years of related engineering experience; OR a Master’s degree in a STEM discipline and 6 years of related engineering experience OR a PhD degree in a STEM discipline and 4 years of related engineering experience

• Your ability to transfer and maintain the final adjudicated Top Secret clearance & SCI (DoD must be in-scope or enrolled in Continuous Evaluation) and any program access(es) required for the position within a reasonable period of time, as determined by the Company.

• Enterprise Integration Patterns (EIP): Proficiency with Spring Integration or Apache Camel to build robust adapters and message routers.

• Java 21+ Proficiency, microservice development and front-end interfaces

• Experience with Observability technologies, health indicators, and dashboarding including Prometheus and Grafana

• Experience with Apache Niagara Files (NiFi)

• Deep knowledge of data flow technologies and networking, including UDP, TCP, and hybrid protocols

• Hybrid S3 Integration: Ability to develop in Java 21+ using the AWS SDK for Java v2 for scenarios where a standalone microservice is more performant than a NiFi processor.

• Dashboard Development:

• Backend: Java 21+/Spring Boot service with a time-series or document-oriented store (e.g., MongoDB or Elasticsearch) for status history.

• Frontend: Proficiency in Angular, React or Vue.js to build the custom "web app" for status display.

• Real-time Updates: Implementation of WebSockets (via Spring WebSocket) or Server-Sent Events (SSE) to push prober status changes to the dashboard instantly.

Preferred Qualifications:

• Active SCI and SAP security clearance.

• Java 21+ Mastery: Leverage Virtual Threads (Project Loom) for high-concurrency probing and file processing tasks.

• Protocol Translation: Deep experience with Protobuf (Google Protocol Buffers), JAXB/Jackson for XML (UCI) processing, and JSON schema validation.

• Asynchronous Messaging: Mastery of JMS (Java Message Service) specifically with ActiveMQ Classic. Candidates should understand connection pooling, message persistence, and dead-letter queue (DLQ) management.

• Resiliency Patterns: Implementation of Circuit Breakers (e.g., Resilience4j) to handle "Relay" failures without cascading into the main effort.

• Data Pipeline Orchestration: Advanced knowledge of Apache NiFi. Looking for ability to design custom FlowFiles, use ListS3/FetchS3, and implement complex routing logic.

• Containerization: Proficiency in Docker/OCI image optimization and deploying standalone Spring Boot apps in resource-constrained environments.

• Testing: Mastery of Test containers for local integration testing of S3 (LocalStack) and ActiveMQ brokers.

• Stream Processing: Familiarity with Project Reactor or Java Streams to process large file metadata efficiently without memory overflows.

• Custom Observability: Experience extending Spring Boot Actuator to expose non-standard health indicators and custom metrics via Micrometer.

• Schema-Driven Monitoring: Ability to design Avro or Protobuf schemas for transmitting custom observability data to ensure cross-org compatibility.