Backend Integration Automation Tester

Job Summary 100% Automation. Zero Manual Testing. Maximum Impact.

If you are a backend automation purist who thrives on testing complex, high-throughput architectures (think MuleSoft, ESB, MQ, and Kafka), this is your playground. As our Senior Automation Engineer, you will be the blueprint designer for a brand-new integration testing practice.

This is a high-visibility, long-term opportunity for a mature engineer who wants to move past standard UI testing, write robust headless code in Java/Python, and serve as the critical bridge between our most vital applications.

location

San Antonio, Texas

job type: Contract to Perm

salary: $55 - 65 per hour

work hours: 8am to 5pm

education: Bachelors

Responsibilities Lead Integration Automation: Architect, develop, and maintain comprehensive, headless test automation frameworks for enterprise-wide integration layers, specifically focusing on MuleSoft (external connectors) and Enterprise Service Bus (ESB) architectures.

End-to-End Service Verification

Validate backend services, API endpoints, notifications, and data pipelines to ensure seamless communication between digital platforms, third-party vendor integrations, and core legacy mainframes.

Asynchronous Messaging Testing

Design and execute automated test scripts to validate high-throughput messaging queues and data streams, ensuring proper message routing and delivery across IBM MQ and Apache Kafka pipelines.

Cross-Functional Coordination

Act as the central integration testing liaison; proactively collaborate with upstream and downstream application teams, development squads, and business units to ensure rigorous end-to-end testing coverage ahead of critical ESB releases.

Practice Transformation

Champion modern Quality Engineering practices within a highly visible, newly established integration space. Challenge the status quo by introducing robust automation patterns that move away from manual verification toward full CI/CD test integration.

Qualifications

Experience: Minimum of 5-6+ years of dedicated software test automation experience, with a proven track record focusing strictly on backend, API, and integration layer testing (no manual UI testing profiles).

Framework Expertise

Strong, hands-on proficiency with Karate and Behavior-Driven Development (BDD) frameworks.

Programming & Scripting

Strong coding skills in Java and Python for building headless automation scripts and interacting directly with backend queues.

Middleware & Messaging

Solid understanding of enterprise integration technologies, including MuleSoft, ESB, IBM MQ, and Apache Kafka.

Soft Skills

High level of professional maturity and communication skills; ability to operate autonomously as an individual contributor and single point of contact while coordinating with multiple application teams.

Education

Bachelor's degree in Computer Science, Computer Engineering, or a closely related technical field is highly preferred.

Skills Apache Kafka,API,automated test scripts,automation scripts,backend services,backend,Behavior-Driven Development,Computer Engineering,Programming,CI/CD,data pipelines,data streams,Integration Automation,enterprise integration,Enterprise Service Bus,ESB,IBM MQ,Computer Science,integration testing,test integration,Java and Python,Asynchronous Messaging,Middleware,MuleSoft,Scripting,coding skills,software test,UI testing,API endpoints,digital platforms,communication skills,Coordination,dedicated,Soft Skills,point of contact,proactively,autonomously,automation,automation experience,Quality Engineering,Testing

Equal Opportunity Employer: Race, Color, Religion, Sex, Sexual Orientation, Gender Identity, National Origin, Age, Genetic Information, Disability, Protected Veteran Status, or any other legally protected group status.

At Randstad Digital, we welcome people of all abilities and want to ensure that our hiring and interview process meets the needs of all applicants. If you require a reasonable accommodation to make your application or interview experience a great one, please contact HRsupport@randstadusa.com.

Pay offered to a successful candidate will be based on several factors including the candidate's education, work experience, work location, specific job duties, certifications, etc. In addition, Randstad Digital offers a comprehensive benefits package, including: medical, prescription, dental, vision, AD&D, and life insurance offerings, short-term disability, and a 401K plan (all benefits are based on eligibility).

This posting is open for thirty (30) days.