Unit Testing Engineer (Sr. SDET)

Job Title: Unit Testing Engineer (Sr. SDET)
Location: Lisle IL (Hybrid)
Experience: 8-10 years
Job Type: Contract / Vendor Engagement

Role Overview
We are looking for a highly skilled and experienced Unit Testing Engineer (SDET) to join our development and QA efforts. This role focuses on designing developing and maintaining robust unit test suites for enterprise applications built on and Spring Boot with a strong emphasis on microservices Kafka and API integrations. The ideal candidate will play a key role in ensuring code quality and test coverage within our CI/CD ecosystem collaborating closely with developers and DevOps teams.

Key Responsibilities
Design implement and maintain unit tests for backend services and APIs developed using and Spring Boot.
Validate Kafka message flows and microservices interactions through unit-level testing.
Develop mocks stubs and test doubles to simulate external APIs and dependencies.
Collaborate with developers to understand application logic and ensure testability of code.
Integrate unit test execution within CI/CD pipelines using Azure DevOps and Git.
Ensure unit-level test coverage for REST and SOAP APIs.
Analyze test results debug failures and assist in root cause analysis and defect resolution.
Document test strategies test coverage metrics and reusable unit testing components.

Required Skills & Experience
8-10 years of experience in software testing with a strong focus on unit testing and test automation.
Proficiency in Java programming languages.
Solid experience with Spring Boot Kafka and Microservices architecture.
Hands-on experience with unit testing frameworks such as:
o Java: JUnit TestNG Mockito
o .NET: xUnit NUnit Moq
Experience integrating tests into CI/CD pipelines using Azure DevOps and Git.
Strong understanding of REST and SOAP APIs and approaches for unit-level validation.
Experience with mocking frameworks and service virtualization tools.
Experience working in Agile development environments with cross-functional teams.

Preferred Qualifications
Experience with static code analysis and test intelligence tools (e.g. SonarQube Codacy).
Familiarity with test management and automation tools including TOSCA and qTest
Exposure to containerized environments using Docker or Kubernetes.
Excellent analytical problem-solving and communication skills.
Contributions to open-source testing libraries or tools (a plus).