Senior API QA Engineer - Remote (STL Area)

SBS Creatix LLC; 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

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