Senior Test Automation Engineer (API/SQL)

SBS Creatix; St. Louis (MO); Remote; USD 110,000 - 160,000; Full time

Job summary

SBS Creatix LLC is seeking a Senior Test Engineer to lead quality across API-driven applications, data solutions, and system integrations. You will design test strategies, build Postman collections, validate data, and drive end-to-end testing in an Agile environment. Remote role open to candidates local to St.

Louis, MO, with US work authorization. Expect long-term contract potential, strong collaboration with business and technical teams, and a focus on delivering robust, scalable software

Qualifications

• Bachelor’s degree in Computer Science, Information Systems, Engineering, or a related technical field preferred.
• 8+ years of software testing and quality assurance experience.
• 5+ years of experience testing APIs, integrations, and data-centric applications in enterprise environments.
• Strong experience creating test strategies, test plans, test scenarios, and test cases.
• Proven experience testing REST APIs using Postman and Swagger/OpenAPI specifications.
• Demonstrated ability to independently design and execute API, integration, and data validation testing from business requirements, technical specifications, and API documentation without reliance on developer-created test scripts, Postman collections, or validation queries.
• Experience testing applications where APIs, integrations, and data services represent the primary interface, with limited or no traditional user interface available for validation.
• Strong experience validating application and integration data using relational databases and query tools.
• Experience performing end-to-end data validation and business-rule verification across multiple systems.
• Strong understanding of API concepts, including authentication, payload validation, status codes, request/response structures, and error handling.
• Experience managing defects throughout the full lifecycle, including identification, documentation, validation, retesting, and closure.
• Experience working within Agile software development teams.
• Proven experience using Jira, Confluence, and test case management tools, preferably Zephyr.
• Strong analytical, troubleshooting, and problem-solving skills.
• Strong written and verbal communication skills.
• Ability to work independently, manage multiple priorities, and deliver high-quality results with minimal supervision.

Responsibilities

• Develop and execute testing strategies for API-driven applications, integrations, and data solutions.
• Analyze business requirements, technical specifications, API documentation, and data models to identify testing scope, risks, and coverage needs.
• Design, create, and maintain test plans, test cases, test data, and testing documentation.
• Build and execute Postman collections from business requirements and Swagger/OpenAPI specifications to validate API functionality, business rules, authentication, and error handling.
• Perform independent validation of API transactions and underlying database records to verify data accuracy, business-rule execution, and end-to-end processing results.
• Execute functional, integration, system, regression, and user acceptance testing activities across multiple applications and services.
• Validate data movement and transformations across interconnected systems, integrations, and downstream consumers.
• Identify, document, troubleshoot, and validate defects through resolution, leveraging API responses, application logs, and data analysis to support root cause investigation.
• Partner with business and technical teams to clarify requirements, assess quality risks, and ensure complete test coverage.
• Communicate testing progress, risks, defects, and results while supporting release validation and deployment activities.

Skills

API testing

Quality assurance

Agile

Analytical thinking

Independent validation

Education

Bachelor’s degree in Computer Science/Information Systems/Engineering

Tools

Postman

Swagger/OpenAPI

Jira

Confluence

Zephyr

SQL

Job description

Long term, ongoing contract with the potential to extend up to 5 years

US Citizen or Green Card Holder only

Must be on our W2, no C2C

Must be presently authorized to work in the U.S. without a requirement for work authorization sponsorship by our company for this position now or in the future

Fully remote but must be local to St Louis, MO

The Test Engineer Senior serves as a technical quality leader responsible for ensuring the quality, reliability, and integrity of API-driven applications, system integrations, and data solutions. This role analyzes business requirements, technical specifications, API documentation, and data models to develop and execute effective testing strategies. The ideal candidate can independently create test scenarios, build Postman collections, validate data and system behavior, investigate defects, and maintain test plans and test cases throughout the software development lifecycle.

Job Specific Responsibilities

• Develop and execute testing strategies for API-driven applications, integrations, and data solutions.
• Analyze business requirements, technical specifications, API documentation, and data models to identify testing scope, risks, and coverage needs.
• Design, create, and maintain test plans, test cases, test data, and testing documentation.
• Build and execute Postman collections from business requirements and Swagger/OpenAPI specifications to validate API functionality, business rules, authentication, and error handling.
• Perform independent validation of API transactions and underlying database records to verify data accuracy, business-rule execution, and end-to-end processing results.
• Execute functional, integration, system, regression, and user acceptance testing activities across multiple applications and services.
• Validate data movement and transformations across interconnected systems, integrations, and downstream consumers.
• Identify, document, troubleshoot, and validate defects through resolution, leveraging API responses, application logs, and data analysis to support root cause investigation.
• Partner with business and technical teams to clarify requirements, assess quality risks, and ensure complete test coverage.
• Communicate testing progress, risks, defects, and results while supporting release validation and deployment activities.

Required

• Bachelor’s degree in Computer Science, Information Systems, Engineering, or a related technical field preferred.
• 8+ years of software testing and quality assurance experience.
• 5+ years of experience testing APIs, integrations, and data-centric applications in enterprise environments.
• Strong experience creating test strategies, test plans, test scenarios, and test cases.
• Proven experience testing REST APIs using Postman and Swagger/OpenAPI specifications.
• Demonstrated ability to independently design and execute API, integration, and data validation testing from business requirements, technical specifications, and API documentation without reliance on developer-created test scripts, Postman collections, or validation queries.
• Experience testing applications where APIs, integrations, and data services represent the primary interface, with limited or no traditional user interface available for validation.
• Strong experience validating application and integration data using relational databases and query tools.
• Experience performing end-to-end data validation and business-rule verification across multiple systems.
• Strong understanding of API concepts, including authentication, payload validation, status codes, request/response structures, and error handling.
• Experience managing defects throughout the full lifecycle, including identification, documentation, validation, retesting, and closure.
• Experience working within Agile software development teams.
• Proven experience using Jira, Confluence, and test case management tools, preferably Zephyr.
• Strong analytical, troubleshooting, and problem-solving skills.
• Strong written and verbal communication skills.
• Ability to work independently, manage multiple priorities, and deliver high-quality results with minimal supervision.

Preferred

• Experience working with Salesforce applications and integrations.
• Experience with API test automation.
• Experience using Karate for API testing and automation.

What Success Looks Like

The successful candidate will bring a strong quality mindset and the technical ability to independently validate APIs, integrations, and data-intensive solutions. This individual will be comfortable analyzing requirements, building Postman collections from API specifications, validating data across multiple systems, and identifying defects without relying on developer-created testing artifacts. They will help improve overall testing quality while serving as a technical resource and trusted partner to the broader project team.