Senior SDET Java REST API and Performance Testing
3Core Systems
Chicago, IL · Posted October 29, 2026
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About the job
Role: Senior SDET Java REST API and Performance Testing (509924) Location: Chicago, IL - Onsite 3-5 days/week Duration: 13 Month Contract Must Have Skills/Attributes: API, Automation Testing, Cucumber, Java, JMeter, REST Experience Desired: · Test automation framework design (8+ Years), · Java, Cucumber, JBehave, BDD testing frameworks (3-5 Years), · Experience testing Web services/REST APIs (3-5 Years), · Experience developing scenario based performance testing using JMeter (3+ Years), · Experience testing full stack and integration testing with 3rd parties (8 Years) Required Minimum Education: Bachelor’s Degree Job Description Education Requirements: Bachelor's degree Required Skills for the Senior SDET: · Strong design and development skills in two or more of the following technologies and tools: Java (3-5 years) Cucumber (3-5 years), JBehave or other BDD testing frameworks · At least 8 years of test automation framework design · Strong experience in testing Webservices (REST APIs) (3+5 years) · Proven experience developing test scripts, test cases, and test data · The ability to write queries in SQL or other relational databases · 3+ years of experience in developing scenario based performance testing using JMeter · Experience testing full stack and integration testing with 3rd parties · End-to-end system integration testing experience for software platforms · Ability to adapt quickly to a complex environment · Pro-active, flexible and creative · Very strong communication skills and the ability to collaborate with developers and business users Preferred Skills: · Hands on experience with Python · Development experience in AWS Cloud technology · Experience in TDD, continuous integration, code review practice is strongly desired · Experience with Apigee or other API gateways is a plus · Experience with DevOps concepts and tools (e.g., CI/CD, Jenkins, Git) · At least 2 years working on an Agile team with a solid understanding of Agile/Lean practices. · Understanding of a micro service Architecture · Experience load and performance testing · Strong documentation skills Senior SDET Overview: · Extend testing automation framework using JAVA/JAVA Script · Take ownership in understanding business requirements/ACs and develop test strategy/test plan · Develop automation test cases using existing automation framework Responsibilities: · Develop test automation code for Continuous Integration (CI), Continuous Delivery (CD), of systems, infrastructure, and test framework · Plan, design, develop, and maintain API test automation framework that facilitates automation scripting, execution, and analysis of results · Provide technical leadership and mentoring for test engineers on multiple applications/projects onshore and offshore; train and mentor project team members to create, execute, analyze, and maintain automated regression suites · Coordinate with product owner to resolve open issues/enhancements/upgrades and understand the use of a specific functionality as needed · Develop automated functional scripts using tools such as Java, Karate, JMeter · Perform exploratory and manual testing of the product suite as appropriate · Provide expertise in testing methodologies, best practices, and standards