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KBR, Inc. · 1 day ago

Senior Software Integration Engineer-API Design

Beavercreek, OH

Full-time

Hybrid

Senior Level

5+ years exp

KBR, Inc. is a leader in providing high-end engineering and advanced technology solutions to the national security community. They are seeking a highly experienced Senior Software Integration Engineer to design and optimize API web services that enhance defense systems and ensure national security.

ConsultingCyber SecurityInformation TechnologyProject ManagementSoftware EngineeringTraining

No H1B

Security Clearance Required

U.S. Citizen Only

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

Qualification

API design/integrationOpenAPIJSON SchemaGRPCGraphQLOAuth2/OIDCJWTMTLSData modelingEvent streamingMulti-classification operations

Required

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

Preferred

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

Benefits

401K plan with company match

Medical

Dental

Vision

Life insurance

AD&D

Flexible spending account

Disability

Paid time off

Flexible work schedule

Company

KBR, Inc.

Glassdoor4.0

At KBR, we deliver science, technology and engineering solutions that are helping governments and companies around the world take on the great challenges of our time.

Founded in 1919

Houston, Texas, USA

10001+ employees