Senior API Migration Engineer (REST APIs - Cloud Migration)

Senior API Migration Engineer (REST APIs – Cloud Migration)Anywhere – Contract – Engineer – Financial Services – Remote – Reference ID: JN -042026-106219 – Date Posted: 03/31/2026Our client seeks a Senior API Migration Engineer to lead the migration, validation, and optimization of REST APIs from on-prem Exadata to Oracle Database in the cloud. The role focuses on compatibility remediation, authentication alignment, performance tuning, and end-to-end validation using tools such as Postman or Insomnia. The engineer will coordinate with IT teams on migration strategy, testing cycles, and release readiness while maintaining reliability and security standards. This is not a net-new development role.Rate: $65.00 to $75.00/hr. w2ResponsibilitiesLead migration and validation of REST APIs from on-prem Exadata to Oracle Database Cloud.Analyze and remediate API compatibility issues across endpoint changes, authentication mechanisms, and data handling logic.Execute API testing and validation using Postman and Insomnia.Optimize API performance within the Oracle Cloud environment.Update backend queries, stored procedures, and integrations impacted by migration.Partner with internal IT teams on migration strategy, testing cycles, and release readiness.Troubleshoot and resolve API defects during validation cycles.Ensure APIs meet performance, reliability, and security standards post-migration.Qualifications6–10 years of experience in API engineering with a focus on migration work.Demonstrated experience migrating REST APIs in enterprise environments.Strong experience with REST API design, testing, and validation.Experience executing API migration between environments from on-prem to cloud.Hands-on experience with Postman and/or Insomnia.Experience with Oracle databases including Exadata and Oracle Database Cloud.Experience modifying API integrations tied to database changes.Understanding of authentication mechanisms such as OAuth and token-based methods.Ability to work in large-scale data environments.Preferred experience with Oracle Database Cloud migrations, financial services or regulated environments, large-scale data systems, and platform modernization initiatives.BenefitsW2 employees of Eliassen Group who are regularly scheduled to work 30 or more hours per week are eligible for the following benefits: medical (choice of 3 plans), dental, vision, pre-tax accounts, other voluntary benefits including life and disability insurance, 401(k) with match, and sick time if required by law in the worked-in state/locality.Skills, experience, and other compensable factors will be considered when determining pay rate. The pay range provided in this posting reflects a W2 hourly rate; other employment options may be available that may result in pay outside of the provided range.EEO StatementEliassen is committed to building a diverse and inclusive team from a variety of backgrounds, perspectives, and skills. We are an Equal Opportunity and Affiantive Action Employer and all employment decisions are based on merit, performance, and business needs. Eliassen does not discriminate on the basis of race, color, gender identity or expression, sexual preference or orientation, sex (including pregnancy, childbirth, and related medical conditions), marital status, creed, religion, physical or mental disability, genetic information, military or veteran status, age, ancestry, national origin, citizenship status, prohibited criminal record inquiries of applicants and employees, or any other category protected by federal, state, or local laws.J-18808-Ljbffr