Unit Testing Engineer

Cloud Hybrid Technologies, LLC; Lisle (IL); On-site; USD 90,000 - 130,000; Full time

Job summary

A technology solutions company is seeking a highly skilled Unit Testing Engineer (SDET) to enhance their development and QA efforts. The ideal candidate will design and maintain unit test suites for applications built on Java, .NET, and Spring Boot, focusing on microservices and API integrations. Responsibilities include validating Kafka message flows, collaborating with developers, and integrating testing within CI/CD pipelines. Candidates should have extensive experience in unit testing and test automation with proficiency in Java, .NET, and relevant frameworks.

Qualifications

• 8-10 years of experience in software testing with a strong focus on unit testing and test automation.
• Proficiency in Java and .NET programming languages.
• Solid experience with Spring Boot, Kafka, and Microservices architecture.

Responsibilities

• Design and maintain unit tests for backend services and APIs.
• Validate Kafka message flows and microservices interactions.
• Develop mocks, stubs, and test doubles to simulate external APIs.
• Collaborate with developers to ensure testability of code.
• Integrate unit test execution within CI/CD pipelines.
• Ensure unit-level test coverage for REST and SOAP APIs.
• Analyse test results and assist in defect resolution.
• Document test strategies and metrics.

Skills

Unit Testing

Java

.NET

Microservices

Kafka

API Integrations

Tools

JUnit

TestNG

Mockito

xUnit

NUnit

Moq

Azure DevOps

Git

Docker

Kubernetes

Job description

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 Java, .NET, 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 Java, .NET, 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.
• Analyse 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 and .NET programming languages.
• Solid experience with Spring Boot, Kafka, and Microservices architecture.
• Hands‑on experience with unit testing frameworks such as:
• Java: JUnit, TestNG, Mockito
• .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).

Cloud Hybrid is an equal opportunity employer inclusive of female, minority, disability and veterans, (M/F/D/V). Hiring, promotion, transfer, compensation, benefits, discipline, termination and all other employment decisions are made without regard to race, color, religion, sex, sexual orientation, gender identity, age, disability, national origin, citizenship/immigration status, veteran status or any other protected status. Cloud Hybrid will not make any posting or employment decision that does not comply with applicable laws relating to labor and employment, equal opportunity, employment eligibility requirements or related matters. Nor will Cloud Hybrid require in a posting or otherwise U.S. citizenship or lawful permanent residency in the U.S. as a condition of employment except as necessary to comply with law, regulation, executive order, or federal, state, or local government contract.