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Senior Software Engineer In Test Jobs in O Fallon, MO

The Timberline Group

Senior Software Engineer

Saint Louis, MO · On-site +1

$119K - $157K/yr

In this role, you should be able to work independently with little supervision. You should have ... Design, implement, review, test, debug, and document high-quality software * Discuss, review and ...

The Timberline Group

SR. SOFTWARE ENGINEER

Saint Louis, MO · On-site +1

$119K - $157K/yr

... in adherence with client and industry-recognized standards and templates. * Perform test planning ... Leadership * Coach less senior Software Engineers in processes, techniques and problem solving ...

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Title and Summary Senior Software Engineer Who is Mastercard? We work to connect and power an ... Proficient in authoring test code with lots of smaller tests followed by few contract tests at ...

Mastercard, Inc.

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Title and Summary Senior Software Engineer Who is Mastercard? We work to connect and power an ... in authoring test code with lots of smaller tests followed by few contract tests at service level ...

Nerdy

Senior Software Engineer

Saint Louis, MO · On-site

$114K - $151K/yr

Proficiency in utilizing various Agentic coding tools to significantly amplify impact and ... Write automated tests to thoroughly validate the correctness of your code. * Deploy large-scale web ...

Biomerieux

Sr. Software Engineer

Hazelwood, MO · On-site

$113K - $149K/yr

Description As a member of the R&D organization responsible for creating software for the development of innovative in vitro diagnostic solutions, the Senior Software Engineer contributes to the ...

bioMerieux

Sr. Software Engineer

Hazelwood, MO · On-site

$115K - $152K/yr

As a member of the R&D organization responsible for creating software for the development of innovative in vitro diagnostic solutions, the Senior Software Engineer contributes to the design and ...

bioMérieux

Sr. Software Engineer

Hazelwood, MO · On-site

$115K - $152K/yr

Description As a member of the R&D organization responsible for creating software for the development of innovative in vitro diagnostic solutions, the Senior Software Engineer contributes to the ...

BioFire Diagnostics

Sr. Software Engineer

Hazelwood, MO

$115K - $152K/yr

As a member of the R&D organization responsible for creating software for the development of innovative in vitro diagnostic solutions, the Senior Software Engineer contributes to the design and ...

Eastman

Senior Software Engineer

Saint Louis, MO · On-site

$114K - $151K/yr

... in a modern CI/CD environment with automated build, test, and deployment workflows. • Experience with cloud platforms, preferably Azure, with familiarity in AWS considered a plus. • Experience ...

Eastman

Senior Software Engineer

Saint Louis, MO

$119K - $157K/yr

... in a modern CI/CD environment with automated build, test, and deployment workflows. • Experience with cloud platforms, preferably Azure, with familiarity in AWS considered a plus. • Experience ...

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 ... Ensure adequate test coverage through unit, functional, integration, and performance testing ...

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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 Engineer

The Timberline Group

Saint Louis, MO • On-site, Remote

$119K - $157K/yr

Full-time

Re-posted 28 days ago

Job description

Description of role:
We are looking for a Senior Software Engineer to produce and implement functional software solutions. You will work with upper management to define software requirements and take the lead on operational and technical projects.
In this role, you should be able to work independently with little supervision. You should have excellent organization and problem-solving skills and be comfortable in an Agile Scrum SDLC. If you also have hands-on experience with backend software development, we would like to meet you.
Your goal will be to develop high-quality software that is aligned with user needs and business goals.
Responsibilities
  • Design, implement, review, test, debug, and document high-quality software
  • Discuss, review and identify potential improvements in new features through code review
  • Brainstorm, challenge, support and convey new ideas proposed by yourself and the team
  • Accurately reproduce and address production software deficiencies in a timely manner
  • Efficiently identify, prioritize and complete tasks in agile scrum software development life cycle
  • Produce clean, readable, testable and efficient code by adhering to standards and conventions
  • Automate and optimize business processes via development of scripts, tools and applications
  • Collaborate with internal teams and vendors to maintain and improve products
  • Evaluate and select the most appropriate technologies that meets business requirements
Requirements
  • Proven experience as a Senior Software Engineer
  • Demonstrated ability to work a project from start through completion
  • Must be self-directed and able to work independently
  • Extensive experience in software development
  • Familiarity with Event Driven Architectures
  • Extensive experience in designing and implementing solutions
  • Expert in C# .Net Core
  • Experience with API driven development and REST web services
  • Experience in AWS (Jenkins, Nuget, k8s is a plus)
  • Strong git bash skills
  • Analytical mind with problem-solving aptitude
  • Excellent organizational and leadership skills
  • BSc/BA in Computer Science or other technical degree
Personal Attributes:
  • Open communication
  • Genuine enthusiasm for financial services, digital assets and trading applications
  • Must be a team player that enjoys solving challenging problems
  • Desire to continue learning and constantly improve skills
  • Ability to mentor more junior developers

The Timberline Group
Phone: 636-209-5537
PO Box 385, Lebanon, MO 65536
www.timberlinegrp.com
resumes@timberlinegrp.com
"Delivering quality solutions through quality people"

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