Senior SDET / Python Automation Engineer

Job Description

A leading organization is seeking a Senior SDET and Python Automation Engineer to support quality engineering initiatives for large-scale, data-driven platforms. This position focuses on backend and API testing, automation framework development, data validation, and quality assurance for complex business and analytics systems.

The ideal candidate is a hands-on engineer with strong Python and SQL expertise who can independently design testing solutions, improve automation coverage, and ensure the reliability of backend services and data processing workflows.

Responsibilities

• Design, develop, and maintain automation frameworks using Python.
• Create automated testing solutions focused on APIs, backend services, and data-intensive applications.
• Develop testing strategies for complex systems involving large datasets, business rules, and data processing workflows.
• Validate backend functionality, service integrations, and application logic through automated testing practices.
• Build scalable test coverage that supports application quality, reliability, and long-term maintainability.
• Analyze test results, identify quality risks, and proactively address gaps in coverage.
• Collaborate with engineering, product, and data teams to support quality objectives throughout the development lifecycle.
• Support automated test execution within continuous integration and deployment workflows.
• Troubleshoot defects, investigate root causes, and contribute to quality improvements across the platform.
• Drive testing initiatives independently while managing priorities and delivering solutions with minimal oversight.

Required Experience and Skills

• 3–5 years of professional experience in software development, software test engineering, or automation engineering roles.
• Strong Python programming and software development skills.
• Experience testing APIs, backend services, and distributed applications.
• Advanced SQL skills with experience validating and analyzing large datasets.
• Experience designing, developing, or significantly enhancing automation frameworks.
• Strong understanding of software testing methodologies, automation best practices, and quality engineering principles.
• Experience supporting data-intensive systems and complex business logic workflows.
• Ability to independently interpret requirements and deliver end-to-end automation solutions.
• Strong analytical, debugging, and problem-solving skills.
• Excellent communication and collaboration abilities.

Preferred Experience and Skills

• Experience with Playwright, particularly for API-focused testing.
• Exposure to data platforms, analytics environments, or large-scale data pipelines.
• Familiarity with forecasting systems, financial platforms, or complex business rule validation.
• Experience integrating automated testing into CI/CD pipelines.
• Experience working within cloud environments such as AWS, Azure, or Google Cloud Platform.

FAQ

1. What does a Senior SDET / Python Automation Engineer do?

A Senior Software Development Engineer in Test (SDET) designs and maintains automated testing solutions for software applications and services. The role combines software engineering with quality engineering to build reliable test frameworks, validate application behavior, and identify defects throughout the development lifecycle.

2. How is Python used in test automation?

Python is used to build automation frameworks, write reusable test scripts, validate APIs, process test data, and integrate automated testing into CI/CD pipelines. Senior engineers also use Python to improve framework maintainability, execution speed, and test coverage.

3. What types of testing are typically automated in this role?

Automation may cover unit, integration, API, functional, regression, end-to-end, and UI testing depending on the application. The SDET determines which scenarios provide the most value for automation while maintaining an appropriate balance between automated and manual testing.

4. Which automation frameworks and tools are commonly used?

Common technologies include PyTest, Selenium, Playwright, Requests, REST API testing tools, mocking libraries, and CI/CD platforms. The exact framework depends on the application’s architecture, technology stack, and existing quality engineering practices.

5. How does an SDET test APIs and backend services?

The engineer validates API requests and responses, authentication, status codes, data payloads, business rules, error handling, and service integrations. Automated API testing helps identify backend defects early and provides faster regression coverage than relying only on UI tests.

6. What role does CI/CD play in test automation?

Automated tests are integrated into CI/CD pipelines so code changes can be validated consistently before deployment. SDETs help configure test stages, manage test environments, publish results, and establish quality gates that provide rapid feedback to development teams.

7. How does a Senior SDET improve test framework quality?

At the senior level, the engineer designs reusable automation components, establishes coding standards, improves reporting and diagnostics, and reduces flaky or redundant tests. They also review automation architecture and mentor other engineers on effective testing practices.

8. What challenges are common in Python test automation?

Common challenges include flaky tests, unstable environments, changing application behavior, inefficient test suites, unreliable test data, and maintaining automation as applications evolve. Senior SDETs address these issues through better framework design, isolation, synchronization, monitoring, and continuous maintenance.