ZipRecruiter

Log In

1

Senior Software Engineer In Test Jobs in O Fallon, MO

VRProIT

Java - SDET

Saint Louis, MO

Title: Java - SDET Location: St Louis, MO Duration: 3 yrs SDET ROLE * Let me be very clear here - these are NOT traditional QA roles. I.e. Selenium-only or QTP/UFT-only guys who are QA Engineers.

VRProIT

Java - SDET

Saint Louis, MO · On-site +1

Java - SDET Location: St Louis, MO Duration: 3 yrs SDET ROLE * Let me be very clear here - these are NOT traditional QA roles. I.e. Selenium-only or QTP/UFT-only guys who are QA Engineers. Instead, I ...

Mastercard, Inc.

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories ... test strategies, automation plans, integration specifications, and operational readiness ...

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories ... Develop robust test automation using Java, Spring, JUnit, Rest Assured, JBehave, Cucumber, or ...

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Title and Summary Senior Software Engineer Who is Mastercard? Mastercard is a global technology ... optimize test execution, data handling, and performance validation Collaborate in Agile ...

Mastercard, Inc.

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Title and Summary Senior Software Engineer Who is Mastercard? Mastercard is a global technology ... test strategies, and validation models • Ensure secure coding practices are embedded in ...

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Title and Summary Senior Software Engineer Who is Mastercard? Mastercard is a global technology ... in test automation, code coverage, and system reliability Analyze and optimize system performance ...

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories ... Design, develop, test, deploy, and support scalable software solutions that power Mastercard ...

Mastercard, Inc.

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories ... Role As a Senior Software Engineer, you will: • Design, develop, test, deploy, and support ...

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Operating in more than 210 countries and territories, we are building a sustainable world that ... Promote test automation and quality gates to ensure consistent and reliable delivery. Ensure ...

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

... in an independent, autonomous environment. Responsibilities Software Engineering & Development - Design, build, test, deploy, and maintain software components, automation frameworks, and validation ...

Mastercard, Inc.

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

... in an independent, autonomous environment. Responsibilities Software Engineering & Development - Design, build, test, deploy, and maintain software components, automation frameworks, and validation ...

MasterCard

Senior Software Engineer

O Fallon, MO

$114K - $151K/yr

Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories ... A Senior Software Engineer is an experienced individual contributor who designs, develops, tests ...

Mastercard, Inc.

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories ... A Senior Software Engineer is an experienced individual contributor who designs, develops, tests ...

next page

Showing results 1-20

All JobsSoftware Engineer In Test JobsSenior Software Engineer In Test JobsSenior Software Engineer In Test Jobs in O'Fallon, MO

Senior Software Engineer In Test information

See O Fallon, MO salary details

$21K

$117.5K

$152.9K

How much do senior software engineer in test jobs pay per year?

As of Aug 15, 2026, the average yearly pay for senior software engineer in test in O'Fallon, MO is $117,460.00, according to ZipRecruiter salary data. Most workers in this role earn between $103,400.00 and $134,200.00 per year, depending on experience, location, and employer.

What is the difference between Senior Software Engineer In Test vs Software Development Engineer in Test?

AspectSenior Software Engineer In TestSoftware Development Engineer in Test
CredentialsBachelor's in CS or related field, experience in testing and automationBachelor's in CS or related field, strong coding skills, experience in testing
Work EnvironmentDesigning test strategies, automation frameworks, collaborating with development teamsDeveloping test tools, writing automated tests, integrating testing into CI/CD pipelines
Industry UsageCommon in tech companies, especially in QA and testing teamsWidely used in software development companies focusing on automation

The main difference is that Senior Software Engineer In Test often focuses on testing strategy and automation leadership, while Software Development Engineer in Test emphasizes developing testing tools and automation code. Both roles require strong coding skills and testing experience, but their focus areas differ slightly within the testing lifecycle.

What are some typical challenges a senior software engineer in test faces when designing automated testing frameworks?

Senior Software Engineers in Test often encounter challenges such as integrating automated tests with complex, evolving codebases and ensuring tests remain reliable as features change. Balancing thorough test coverage with execution speed, especially in continuous integration environments, is another common concern. Additionally, collaborating with both development and QA teams to align on testing strategies and maintaining documentation for test frameworks are key responsibilities that require strong communication and adaptability.

What is a senior software engineer in test?

Senior Software Engineers in Test are experienced professionals who design, develop, and implement automated testing frameworks and tools to ensure the quality and reliability of software products. They work closely with development and QA teams to identify testing needs, create robust test plans, and write automated scripts that validate software functionality. In addition to hands-on coding, they often mentor junior engineers, drive process improvements, and contribute to the overall testing strategy of the organization.

What are the key skills and qualifications needed to thrive as a senior software engineer in test, and why are they important?

To thrive as a Senior Software Engineer in Test, you need a deep understanding of software development, test automation frameworks, and a background in computer science or a related field. Mastery of tools like Selenium, Jenkins, JUnit, and experience with CI/CD systems, as well as relevant certifications such as ISTQB, are typically required. Strong analytical thinking, problem-solving abilities, and effective communication skills set top candidates apart in this role. These skills are crucial for ensuring robust, scalable, and reliable software delivery in complex technical environments.

What are popular job titles related to Senior Software Engineer In Test jobs in O'Fallon, MO?

For Senior Software Engineer In Test jobs in O'Fallon, MO, the most frequently searched job titles are:

What cities near O'Fallon, MO are hiring for Senior Software Engineer In Test jobs?

Cities near O'Fallon, MO with the most Senior Software Engineer In Test job openings:

Senior Software Engineer In Test jobs near you
Infographic showing various Senior Software Engineer In Test job openings in O'Fallon, MO as of August 2026, with employment types broken down into 1% Internship, 83% Full Time, 12% Part Time, and 4% Contract. Highlights an 87% Physical, 4% Hybrid, and 9% Remote job distribution, with an average salary of $117,460 per year, or $56.5 per hour.

SENIOR SOFTWARE DEVELOPMENT ENGINEER IN TEST (Sr. SDET) at Resource Informatics Group Inc O Fal[...]

Shell Lubricants Hub Hamburg

O Fallon, MO • On-site

$90 - $120/hr

Other

Posted 9 days ago

Job description

SENIOR SOFTWARE DEVELOPMENT ENGINEER IN TEST (Sr. SDET) job at Resource Informatics Group Inc. O Fallon, MO.

Role: SENIOR SOFTWARE DEVELOPMENT ENGINEER IN TEST (Sr. SDET)

Location: O’fallon MO

Visa: USC/GC Preferred

Duration: 9 Months

Interview: Phone/Skype

Overview
  • Push Payments Development team owns a number of applications, primarily focusing on the Mastercard Send application.
  • Mastercard send is an API based application which primarily focuses on P2P and Disbursement transactions and is heavily integration with Mastercard core applications.
  • Automate UI, API and Batch regression test suites.
  • Integrate automation tests in CI/CD pipeline.
  • Participate in and provide direction to testing activities to ensure the quality and functionality of assigned MasterCard developed systems.

Do you want to be a part of a collaborative team environment

Are you motivated to stay on the cutting edge of digital payments technology

Role
  • Defect management and oversight
  • Performance Testing
  • Automated regression testing
  • Status reporting and metrics creation
  • Point of escalation for issues discovered during the testing phase
All About You
  • Expertise knowledge using Selenium and any BDD framework (Cucumber, Jasmine or JBehave)
  • Intermediate Knowledge in REST API testing and knowledge of any API automation framework (Restassured, Spock or Karate).
  • Intermediate Knowledge of StormRunner or other performance testing tools
  • Intermediate knowledge in core Java, Groovy, Node.js, and ReadyAPI
  • Advanced experience writing user stories and acceptance criteria
  • Strong communication and problem solving skills
#J-18808-Ljbffr

Apply