Senior Software Integration Engineer-API Design

KBR, Inc.Beavercreek, OH
2dHybrid

About The Position

KBR’s National Security Solutions team provides high-end engineering and advanced technology solutions to our customers in the intelligence and national security communities. In this position, your work will have a profound impact on the country’s most critical role – protecting our national security. KBR is seeking a highly experienced Senior Software Integration Engineer to join our team in Beavercreek, OH. The ideal candidate will be expert in API web design with a Secret DoW clearance.

Requirements

  • 5–8+ years in API design/integration; strong OpenAPI, JSON Schema, protobuf/gRPC, and GraphQL experience
  • Security: OAuth2/OIDC, JWT, mTLS, policy enforcement; experience with gateway technologies
  • Data modeling, metadata/lineage design, and auditability for regulated domains
  • Active DoW Secret clearance

Nice To Haves

  • Experience integrating legacy/constructive simulation systems into modern API ecosystems
  • Event streaming (Kafka/NATS) for asynchronous workflows and telemetry
  • Comfortable designing interfaces for multi‑classification operations
  • Active Top Secret clearance with SCI eligibility

Responsibilities

  • Define and govern the API‑first contracts that modularize the simulation core and onboard legacy tools as modern services
  • Ensure transparency, repeatability, and security across all integrations (tools, data, metadata, orchestration)
  • Design REST/gRPC APIs and GraphQL schemas for simulation core services: timing, state‑of‑play, user input, orchestration
  • Lead API governance: versioning, schema evolution (OpenAPI/JSON Schema/proto), deprecation policy, and documentation
  • Wrap existing simulation/wargaming tools as secure web services via SDKs; standardize authentication/authorization (OIDC/JWT) and mTLS
  • Implement API gateway patterns: routing, rate limiting, quotas, request validation, and zero‑trust controls
  • Model metadata & lineage: tagging of tools/inputs/results; expose reconciliation endpoints for VV&A, fidelity compatibility assessment, and repeatability

Benefits

  • KBR offers a selection of competitive lifestyle benefits which could include 401K plan with company match, medical, dental, vision, life insurance, AD&D, flexible spending account, disability, paid time off, or flexible work schedule.
  • We support career advancement through professional training and development.

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What This Job Offers

Job Type

Full-time

Career Level

Mid Level

Education Level

No Education Listed

Number of Employees

5,001-10,000 employees

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