Senior Software Integration Engineer-API Design jobs in United States
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KBR Careers · 2 days ago

Senior Software Integration Engineer-API Design

positionBeavercreek, Ohio
timeFull-time
remoteHybrid
senioritySenior Level
date5+ years exp

KBR is a leader in providing high-end engineering and advanced technology solutions for national security. The Senior Software Integration Engineer will be responsible for defining API contracts, ensuring secure integrations, and designing REST/gRPC APIs for simulation core services, contributing to impactful defense systems.

Information Technology & Services
badNo H1BnoteSecurity Clearance RequirednoteU.S. Citizen Onlynote

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 modelingMetadata designEvent streamingMulti-classification operationsAuditability

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 Careers

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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.
dateFounded in 1919
location
Houston, TX, US
people-size10001+ employees
web-link
https://careers.kbr.com/

Funding

Current Stage
Late Stage

Leadership Team

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Becky Sewell
Chief Training Officer (CTO)
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Dana Dorsey
Sr. VP, Chief Financial Officer
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Company data provided by crunchbase