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Principal Software Engineer

ECS

Salary not specified
Nov 19, 2025
St. Louis, MO, US
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ECS is seeking an energetic person to join ECS Federal's elite engineering team supporting one of National Security's most critical modernization initiative. As a Principal Software Engineer, you'll architect solutions that directly enable warfighters, intelligence professionals, and first responders to make split-second decisions with world-class GEOINT data.

Requirements

  • Java, JavaScript or Python enterprise application development, Web services architecture, design, and development
  • Relational database design
  • Spatial database design
  • SQL database design
  • Micro-service architecture, design and development
  • Containerization and/or Orchestration
  • API Development
  • Cloud Native Development, AWS, Azure, Google Cloud or similar Cloud Service providers
  • Experience with Continuous Delivery and Continuous Integration (CI/CD) techniques, test-driven development, or automated testing practices
  • Experience with relational database development
  • Hands-on experience implementing CI/CD pipelines that meet strict security accreditation requirements (ATO, IAVA)
  • Success translating complex intelligence requirements into a variety software architectures

Responsibilities

  • Architect full-stack geospatial intelligence solutions processing petabytes of data across classified networks, designing APIs and microservices that integrate real-time collection feeds with analytic platforms for sub-second intelligence delivery
  • Lead enterprise automation initiatives reducing analyst workload by 60%+ through intelligent pipeline design and React-based workbenches that synthesize multi-INT data sources into actionable intelligence products
  • Mentor engineering teams of 3-5 developers through code reviews, architecture design sessions, and technical spike planning while representing the team in cross-program integration forums
  • Champion DevSecOps transformation by implementing CI/CD pipelines achieving 99.7% deployment success rates using GitLab, Jenkins, container orchestration, and automated security scanning
  • Collaborate directly with GEOINT analysts to translate operational mission workflows into technical requirements and present capability demos to customer leadership during quarterly reviews
  • Drive technical decisions across the stack leveraging Java/Python/JavaScript frameworks, AWS GovCloud infrastructure, geospatial technologies (OGC services, PostGIS), and data engineering platforms (Kafka, PostgreSQL, Elasticsearch)

Other

  • Requires final acceptance by the Prime contractor and government customer.
  • Validation of required clearances upon acceptance and approval from a cognizant government contracting officer. After customer indoctrination, the candidate will be submitted for a Counterintelligence Polygraph.
  • US Citizen
  • Active TS/SCI security clearance required to apply/interview; must be able to pass a CounterIntelligence (CI) polygraph following customer indoctrination
  • High School Diploma and 17+ years of relevant experience; alternatively, a Bachelor's degree with 15+ years, or a Master's degree in a related field of study with 13+ years, or a combination of military (17+ years), experience, training or certifications
  • Minimum of 5 years or more experience with agile and lean philosophies, with at least 2 years serving as scrum or team lead
  • Proven track record leading enterprise-scale development efforts with measurable mission impact
  • Ability to mentor engineers and elevate team technical capabilities
  • Independent operator comfortable working in ambiguous, fast paced environments
  • Work with clients or stakeholders to develop user-stories in support of full-service consumer and business applications