SDET Engineer - API Automation - Chennai

SDET Engineer

Role Overview

We are seeking a highly skilled SDET Engineer with strong expertise in API testing, automation framework development, integration testing, and quality engineering practices. The ideal candidate will be responsible for ensuring the quality, reliability, and performance of APIs and backend services across enterprise applications. This role requires close collaboration with development, product, and business teams to deliver robust and scalable solutions while driving test automation throughout the software development lifecycle.

Key Responsibilities

• Lead and drive API Testing, Integration Testing, System Testing, and End-to-End (E2E) validation across multiple applications and platforms.


• Design, develop, and maintain scalable API automation frameworks using Java, Rest Assured, Cucumber, TestNG/JUnit, or equivalent frameworks.


• Create and execute automated API test suites covering functional, integration, regression, and negative test scenarios.


• Validate RESTful APIs, microservices, and backend services including request/response verification, schema validation, authentication, authorization, and error handling.


• Perform service-level testing using tools such as Postman, Rest Assured, Swagger/OpenAPI, Newman, or similar open-source frameworks.


• Collaborate with developers, business analysts, architects, and third-party vendors to ensure comprehensive API test coverage and successful delivery.


• Perform test planning, estimation, scheduling, and execution for large and complex initiatives.


• Develop and maintain automated test execution within CI/CD pipelines to support continuous testing practices.


• Conduct backend and database validations using SQL and MongoDB Compass.


• Analyze application logs and troubleshoot integration issues across distributed systems and microservices.


• Support SIT, UAT, production deployments, and release validation activities.


• Manage defects, perform root cause analysis, and track issues using JIRA or Azure DevOps (ADO).


• Participate actively in Agile ceremonies including sprint planning, backlog refinement, stand-ups, reviews, and retrospectives.


• Coordinate effectively with onshore and offshore teams to ensure timely delivery and quality outcomes.


• Provide regular status updates and communicate testing progress, risks, and dependencies to stakeholders.


• Coordinate effectively across onshore and offshore teams.


• Maintain flexibility to overlap with onsite working hours (until noon, as needed).

Required Skills & Experience

• 5+ years of experience in API Testing and API Automation is a must.


• Experience with API testing tools such as Postman, Newman, Swagger/OpenAPI, or equivalent frameworks.


• Strong understanding of REST APIs, JSON, XML, HTTP/HTTPS protocols, OAuth, JWT, and API security concepts.


• Experience testing microservices-based architectures and distributed systems.


• Strong SQL skills and experience with database validation and data integrity testing.


• Experience with source control and CI/CD tools such as Git, Jenkins, GitHub Actions, or Azure DevOps.


• Strong debugging and troubleshooting skills, including network and service-level analysis.


• Experience using monitoring and observability tools such as Kubernetes (K8s), Kibana, Dynatrace, Splunk, or similar platforms.


• Strong analytical, communication, and stakeholder management skills.


• Experience working in Agile/Scrum environments.

Preferred Qualifications

• Experience with Playwright or Selenium for UI automation testing.


• Knowledge of Node.js and JavaScript-based testing frameworks.


• Experience with API performance testing tools such as JMeter or k6.


• Experience testing event-driven systems and messaging platforms such as Kafka.


• Mobile application testing experience.


• Experience with responsive web and cross-browser validation.


• Familiarity with Retail domain applications and business processes.

Primary Focus: 60% API Automation & Backend Validation, 40% UI/E2E Testing (Automation & Manual).