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Senior Software Engineer - Backend (Seattle, WA)

Pacific Northwest National Laboratory

Salary not specified
Oct 24, 2025
Seattle, WA, US
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PNNL's National Security Directorate (NSD) needs to develop advanced AI systems and data analytics capabilities to counter increasingly complex, AI-enabled threats to national security. This involves architecting and delivering next-generation AI systems, multi-intelligence fusion platforms, and large-scale analytics capabilities to strengthen the nation's security infrastructure.

Requirements

  • Advanced Python, C-Sharp/.Net, with proficiency in JavaScript/TypeScript, [Java, C/C++, Rust]
  • AWS/Azure architecture, Kubernetes orchestration, Infrastructure as Code, [GCP, Multi-cloud, Edge computing]
  • S3, Elasticsearch/OpenSearch, PostgreSQL, MongoDB, Redshift, Delta Lake, Vector stores
  • Agentic AI systems, LLMs, model deployment & orchestration, MLOps platforms, distributed training, model serving at scale, vector databases, graph analytics
  • Data fusion, GEOINT processing, signals analysis, threat correlation
  • Spark/Databricks, Kafka/streaming, data lake/mesh architectures, real-time analytics, distributed computing
  • Geospatial processing frameworks, time-series databases, distributed computing, secure enclaves

Responsibilities

  • Design and build distributed platforms in state-of-the-art secure facilities, architect high-availability microservices, conduct performance testing on enterprise-scale systems
  • Deploy and optimize software systems in operational environments, troubleshoot mission-critical applications in real-world conditions, collaborate directly with system operators and infrastructure teams
  • Build ultra-high-performance APIs that handle millions of requests per second, architect systems that operate under extreme performance constraints, solve scalability challenges at national scale
  • Build platforms that process streaming data with sub-millisecond latency, architect fault-tolerant systems that achieve 99.99% uptime, optimize performance for mission-critical operations
  • Develop scalable microservices architectures that coordinate across multiple domains, build robust API gateways for classified environments, architect service mesh implementations that handle the nation's most sensitive traffic
  • Lead distributed system design processing data from hundreds of sources simultaneously, architect real-time streaming platforms that handle terabytes per hour, design event-driven architectures that scale horizontally across data centers
  • Develop container orchestration platforms that span multiple security domains, architect CI/CD pipelines processing millions of deployments, build monitoring and observability systems across secure enclaves

Other

  • This position is based in Seattle, WA, and requires an on-site presence Monday through Thursday, with Friday as required by business needs.
  • PhD and 1 year of relevant experience -OR- MS/MA or higher and 3 years of relevant experience -OR- BS/BA and 5 years of relevant experience -OR- AA and 14 years of relevant experience -OR- HS/GED and 16 years of relevant experience
  • U.S. Citizenship
  • Applicants selected will be subject to a Federal background investigation and must meet eligibility requirements for access to classified matter in accordance with 10 CFR 710, Appendix B.
  • The candidate selected for this position will be subject to pre-employment and random drug testing for illegal drugs, including marijuana, consistent with the Controlled Substances Act and the PNNL Workplace Substance Abuse Program.