Sr. API Engineer

Apex Systems, LLC; Hoover (AL); Hybrid; USD 83,000 - 138,000; Full time

Benefits offered by this job

Medical insurance

401K

HSA

Employee Assistance Program (EAP)

ESPP

Job summary

Everforth Apex is seeking a Senior API Engineer to join our remote-first team supporting an enterprise API security modernization program. You will secure REST APIs, upgrade Java stacks and implement OAuth 2.0 and JWT-based access controls across multiple repositories.

You will collaborate with security and platform teams, update OpenAPI specifications, and deliver automated tests and documentation to production readiness. This role offers a strong focus on production quality and career growth.

Qualifications

• Bachelor's degree or equivalent in CS/engineering/IS preferred.
• 5+ years of enterprise API/backend engineering experience preferred.
• Hands-on modernization and security expertise required.

Responsibilities

• Assess repositories and secure REST APIs; configure OAuth 2.0, JWT roles, scopes, and claims.
• Upgrade applications through modernization path: Gradle 8.x, Spring Boot 3.x, Java 21, Gradle 9.x.
• Resolve compatibility issues from framework/library upgrades.
• Update OpenAPI specifications and deprecate legacy endpoints.
• Implement application logging and SIEM integration.
• Develop and maintain automated unit/integration/API security tests.
• Support testing, deployment validation, and hypercare activities.
• Document implementation evidence and participate in standups.

Skills

Java 17/21

Spring Boot

OAuth 2.0

JWT

OpenAPI 3

Swagger

CI/CD

Git

Security testing

Education

Bachelor's degree or equivalent

Tools

Okta

SIEM

Harness

Anypoint/API gateway

Flyway

JaCoCo

Job description

# Sr. API EngineerApply**Job#: 3052955****Job Description:**Sr. API Engineer**Location:** remote, United States (Remote)Role OverviewWe are seeking a Senior API Engineer to support an enterprise API security remediation and platform modernization initiative. This role involves securing REST APIs, modernizing the Java stack, implementing authentication and authorization controls, and delivering production-ready changes with supporting technical validation and documentation for four separate Java application repositories. The ideal candidate will have demonstrated hands-on modernization and security expertise.Key Responsibilities* Assess existing repositories and Jira stories; develop and secure REST APIs; configure OAuth 2.0, JWT roles, scopes, and claims.* Upgrade applications sequentially through the required modernization path: Gradle 8.x, Spring Boot 3.5.x, Java 21, and then Gradle 9.x.* Resolve compatibility issues related to framework, library, and dependency upgrades.* Update OpenAPI 3 specifications and deprecate legacy API endpoints.* Implement application logging and SIEM integration.* Develop and maintain automated unit, integration, and API security tests.* Resolve defects discovered during testing and deployment validation.* Participate in standups, document implementation evidence, and support deployment and hypercare activities.Required Qualifications**Education:** A Bachelor’s degree in Computer Science, Engineering, Information Systems, or equivalent practical experience is preferred.**Experience:** 5+ years of enterprise API/backend engineering experience is preferred.**Technical Skills:*** Advanced Java 17/21, Spring Boot 3.x, and Gradle experience, including major-version upgrades and dependency remediation.* Advanced Spring Security with hands-on OAuth 2.0, JWT scopes/roles/claims, and secure REST API development.* OpenAPI 3/Swagger expertise plus strong automated unit, integration, and API security testing experience.* Experience working with Git-based source control and CI/CD pipelines.* Ability to troubleshoot complex application, dependency, and integration issues.Preferred Qualifications* Experience with Okta or comparable enterprise Identity Provider, including API configuration across QA and production environments.* Experience with SIEM integration, structured security-event logging, and enterprise logging SDKs.* Experience with Harness, Anypoint/API gateway, Flyway, JaCoCo, DNS/load-balancer coordination, and production deployments.Work EnvironmentThe delivery team includes an Engagement Manager, API Architect, and API Engineer(s). This role requires strong ownership, clear communication, collaboration across security and platform teams, disciplined risk escalation, documentation, adaptability, and attention to production quality. *Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRateds Best of Staffing in Talent Satisfaction in the United States and Great Place to Work in the United Kingdom and Mexico.**Everforth Apex uses a virtual recruiter as part of the application process. Click here for more details. By applying for this job, you agree to receive calls, AI-generated calls, text messages, or emails from Everforth Apex and its affiliates, and contracted partners. Frequency varies for text messages. Message and data rates may apply. Carriers are not liable for delayed or undelivered messages. You can reply STOP to cancel and HELP for help. You can access our privacy policy at https://www.apexsystems.com/privacy-policy**Everforth Apex Benefits Overview: Everforth Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Everforth Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Everforth Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our ‘Welcome Packet’ as well, which an Everforth Apex team member can provide.**Everforth Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Everforth Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law.**If you require an accommodation under the Americans with Disabilities Act to participate in an interview with a virtual recruiter or to use our website for a search or application, please contact our Benefits Department at [e-mail] or 804-523-8228. Please note that this contact information is strictly to be used for medical ADA accommodations and that no other inquiries will be answered.**UnitedHealthcare creates and publishes the Transparency in Coverage Machine-Readable Files on behalf of Everforth Apex Systems.***Employee Type:** Contract**Remote:** Yes**Location:** Hoover, AL, US**Job Type:** Engineering and Technicians**Date Posted:** September 23, 2026**Pay Range:** $85 - $100 per hour