Senior Software Integration Engineer-API Design

Title:

Belong. Connect. Grow. with KBR!

KBRs National Security Solutions team provides high-end engineering and advanced technology solutions to our customers in the intelligence and national security this position your work will have a profound impact on the countrys most critical role protecting our national security.

Why Join Us

• Innovative Projects: KBRs work is at the forefront of engineering logistics operations science program management mission IT and cybersecurity solutions.

• Collaborative Environment: Be part of a dynamic team that thrives on collaboration and innovation fostering a supportive and intellectually stimulating workplace.

• Impactful Work: Your contributions will be pivotal in designing and optimizing defense systems that ensure national security and shape the future of space defense.

Role summary

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.

Key responsibilities

• Define and govern the APIfirst 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 stateofplay 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 zerotrust controls
• Model metadata & lineage: tagging of tools/inputs/results; expose reconciliation endpoints for VV&A fidelity compatibility assessment and repeatability

Work Environment:

• Location: On-site/Hybrid/Remote
• Travel Requirements: 15%
• Working Hours: Standard

Qualifications:

Required:

• 58 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

Desired:

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

Ready to Make a Difference

If youre excited about making a significant impact in the field of space defense and working on projects that matter we encourage you to apply and join our team at KBR. Lets shape the future together.

KBR 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.

Belong Connect and Grow at KBR

At KBR we are passionate about our people and our Zero Harm culture. These inform all that we do and are at the heart of our commitment to and ongoing journey toward being a People First company. That commitment is central to our team of teams philosophy and fosters an environment where everyone can Belong Connect and Grow. We Deliver Together.

KBR is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race color religion disability sex sexual orientation gender identity or expression age national origin veteran status genetic information union status and/or beliefs or any other characteristic protected by federal state or local law.