Senior Test Automation Engineer

3Core Systems, Inc; Chicago (IL); On-site; USD 130,000 - 170,000; Full time

Job summary

3Core Systems, Inc. in Chicago, IL is seeking a Senior Test Automation Engineer with 8–10 years of software testing and SDET experience. The role emphasizes Java-based automation, REST API and backend testing, and strong UI automation capabilities.

The position requires hands-on design and development of automation frameworks, mentorship of junior engineers, and ownership of testing strategy through execution. Onsite interviews in Chicago are required; occasional travel may be needed.

Qualifications

• 8–10 years of software testing/SDET experience.
• Strong hands-on Java programming experience.
• Experience designing and developing automation frameworks using Java.
• Strong REST API testing and backend testing experience.
• UI automation and functional testing.
• Knowledge of BDD frameworks and Cucumber.
• Experience with Karate or REST Assured.
• Ability to develop test strategies, test plans, and automation solutions.
• Experience owning features from testing strategy through execution.
• Mentoring junior team members and conducting PR reviews.
• Willingness to attend the second interview onsite in Chicago.

Responsibilities

• Develop test automation code for CI/CD pipelines and automation of systems, infrastructure, and test framework.
• Plan, design, develop, and maintain API test automation framework that facilitates scripting, execution, and analysis of results.
• Provide technical leadership and mentoring for test engineers on multiple applications/projects; train and mentor project team members.
• Coordinate with product owner to resolve issues and understand functionality needs.
• Develop automated functional scripts using Java, Karate, JMeter.
• Perform exploratory and manual testing of the product suite as appropriate.
• Provide expertise in testing methodologies, best practices, and standards.

Skills

Java

REST API testing

BDD frameworks

Cucumber

JMeter

SQL

Python

AWS Cloud

CI/CD

Git

Jenkins

Agile

Microservices

Education

Bachelor's degree

Master's degree

Tools

JBehave

Apigee

Jenkins

Git

JMeter

Job description

Chicago, United States | Posted on 11/02/2026

JobTitle: Senior Test Automation Engineer

Location:Chicago, IL 60661

Duration:12 months contract

Interviewprocess: Round 1: Virtual & Round 2: Onsite interview in Chicago Office (Non- negotiable)

WorkEnvironment

Worker will need to come into office 3-5x a week; A full return to office (5days in office) will eventually happen, so candidates need to make sure theyare good with that.

Musthaves

• 1. 8-10 years of overall experience in software testing/SDETroles.
• 2. Strong hands-on Java programming experience.
• 3. Proven experience designing and developing automationframeworks using Java.
• 4. Strong REST API testing and backend testing experience.
• 5. Experience with UI automation and functional testing.
• 6. Good understanding of BDD frameworks and Cucumber.
• 7. Karate or REST Assured experience.
• 8. Ability to independently develop test strategies, testplans, and automation solutions.
• 9. Experience taking ownership of features from testingstrategy through execution and maintenance.
• 10. Experience mentoring junior team members and conducting PRreviews.
• 11. Willingness to attend the second interview onsite inChicago.

TypicalTask Breakdown

• Developtest 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 facilitatesautomation scripting, execution, and analysis of results.
• Providetechnical leadership and mentoring for test engineers on multipleapplications/projects onshore and offshore; train and mentor project teammembers to create, execute, analyze, and maintain automated regression suites.
• Coordinatewith product owner to resolve open issues/enhancements/upgrades and understandthe use of a specific functionality as needed.
• Developautomated functional scripts using tools such as Java, Karate, JMeter.
• Performexploratory and manual testing of the product suite as appropriate.
• Provideexpertise in testing methodologies, best practices, and standards.

CANDIDATEREQUIREMENTS

Education & Experience Required

• Yearsof experience: 8-10 yrs experience.
• Bachelor’sand Master’s degree and 8+ years of experience.

RequiredTechnical Skills

Required

• Strongdesign and development skills in two or more of the following technologies andtools: Java (3-5 years), Cucumber (3-5 years), JBehave or other BDD testing frameworks.
• Atleast 8 years of test automation framework design.
• Strongexperience in testing Webservices (REST APIs) (3+5 years).
• Provenexperience developing test scripts, test cases, and test data.
• Theability to write queries in SQL or other relational databases.
• 3+years of experience in developing scenario-based performance testing usingJMeter.
• Experiencetesting full stack and integration testing with 3rd parties.
• End-to-endsystem integration testing experience for software platforms.
• Handson experience with Python.
• Developmentexperience in AWS Cloud technology.
• Experiencein TDD, continuous integration, code review practice is strongly desired.
• Experiencewith Apigee or other API gateways is a plus.
• Experiencewith DevOps concepts and tools (e.g., CI/CD, Jenkins, Git).
• Atleast 2 years working on an Agile team with a solid understanding of Agile/Leanpractices.
• Understandingof a micro service Architecture.
• Experienceload and performance testing.
• Strongdocumentation skills.

SoftSkills

• Abilityto adapt quickly to a complex environment.
• Pro‑active,flexible and creative.
• Verystrong communication skills and the ability to collaborate with developers andbusiness users.

Skill set

Software Testing, SDET, Java, REST API testing, Backend Testing, UI Automation, Functional Testing, BDD frameworks, Cucumber, Test Strategies, Test Plans.