Senior API Gateway Engineer (Kong / webMethods)

About The C.A.S.E. Engineering Group At The C.A.S.E. Engineering Group, we specialize in cybersecurity advisory services, modernizing IT architectures, developing IT strategic plans, and engineering innovative systems and software. C.A.S.E. stands for C*ybersecurity, Architecture, Stratey, and E*ngineering. We take a balanced, tailored approach to solving unique organizational challenges while leveraging industry best practices for long-term success. This role supports a mission-critical federal enterprise integration environment processing approximately one billion transactions per month across a hybrid cloud and on-premises footprint. Position Overview Job Type: Full-Time Location: Remote (U.S.) with occasional on-site meetings in the Washington, DC area Target Salary Range: $165,000 – $190,000 / year (Note: Final offer is subject to candidate experience and expectations) Position Contingency: Contingent upon contract award (Anticipated award: September 2026; Estimated start date: Fall / November 2026) As our Senior API Gateway / Platform Engineer, you will serve as the senior technical resource sustaining a high-availability production gateway while leading the engineering execution of a phased migration from IBM webMethods API Gateway to a next-generation gateway platform (e.g., Kong). Key Responsibilities Platform Operations: Operate, configure, and sustain an enterprise API gateway platform supporting ~255 production APIs and 1B+ monthly transactions at a minimum 99.5% availability. Gateway Engineering: Engineer gateway services, routes, policies, plugins, certificates, authentication/authorization integrations, and environment promotion patterns within Zero Trust security boundaries. Phased Migration: Lead installation, configuration, and production-readiness for the new enterprise gateway product. Develop API inventory classification, migration wave plans, dual-run operations, and rollback-ready cutover execution. Testing & Validation: Perform functional, connectivity, security, performance, and observability validation for gateway changes and migrated APIs to produce acceptance-ready test evidence. Security & Compliance: Enforce Zero Trust controls, including OAuth 2.0, OpenID Connect, mTLS, JWT token validation, rate limiting, and least-privilege access. Documentation & Leadership: Produce runbooks, configuration baselines, and release packages. Mentor junior/automation engineers and conduct senior technical reviews of gateway configuration changes. Qualifications & Requirements Experience: At least 8 years of enterprise integration or API platform engineering experience. At least 5 years of hands-on production experience with enterprise API gateway products. Technical Expertise: Hands-on experience with IBM webMethods API Gateway administration/configuration (strongly preferred). Hands-on experience with Kong Enterprise or Kong Konnect implementation/configuration (strongly preferred). Working knowledge of container platforms (OpenShift or Kubernetes) supporting gateway workloads. Familiarity with CI/CD-integrated gateway configuration, configuration-as-code, and environment promotion. Observability tooling experience (AppDynamics, ELK, OpenTelemetry). Clearance & Security: Must possess U.S. work authorization. Must be able to obtain and maintain a federal Moderate Risk Public Trust (MBI level) background investigation. (Prior federal agency suitability or active federal background investigations are highly desirable). Our Hiring Process We keep our recruitment process structured, transparent, and efficient: Submit Application: Apply directly on Indeed with your updated resume. Salary & Contingency Confirmation: State your expected salary range and confirm your availability for a contingent start in Fall 2026. Alex AI Assessment: Complete an automated AI assessment interview through Alex AI. (Candidates achieving a score of 80/100 or higher will automatically advance). Recruiter Screening Call: Connect with a member of our recruiting team to discuss your hands-on technical experience, federal background/suitability, and contract alignment. Final Technical Review & Selection: Final candidate slate submission and formal placement consideration. Why Join Us? Scale & Impact: Lead the modernization of an enterprise platform operating at a 1-billion-transaction-per-month scale. Modernization: Work with cutting-edge cloud, container, and API management technologies in a Zero Trust environment. Flexibility: Enjoy a remote-first work model with reasonable flexibility. Pay: $165,000.00 - $190,000.00 per year Benefits: Dental insurance Health insurance Paid time off Vision insurance Application Question(s): What are your salary expectations? Location: Washington, DC (Required) Work Location: Remote